NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER
Edition: Model Aviation - 1984/07
Page Numbers: 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 139, 142, 143
NO OCR TEXT AM WELL PLEASED first Electric airplane design has thor oughly tested parasol cabin versions variety power systems good aircraft must think twice before inflicting first anything public includes large number experi enced modelers design category can because have much help good peoplethe manufacturers columnists like Mitch Poling through own column perceptive inputs pioneers like Heinz Koemer Bob Kopski Gus Munich firsthand flying sessions Don Srull such treasure trove information old FF Rubber Gas flier 36 years RC sport flying fun flying cup tea youll cer tainly enjoy Mr Funs design relaxed style RC Electrics 10-min-plus soaring flights mind has flown mostly Leisure LT-50 gear reduction also flies quite satis factory other 05-size electric motorseither direct drive reduction Its choice whether build para sot wing mount cabinthough conversion parasol cabin can quickly done has no excuse failing attain specific performance envelope much said about simple electric piloting techniques construction article usual sense can build model open framework construction plan surely dont need tell Pictures show some key points Whether may already Electrics just glow-engine RCer inclined bother' Electric stuff should build model best answer tell did found Electrics worth Note plan shows Jomar controller rather three-servo setup op E-2 Cub itand relaxer could result Installed 2A1 geared motor 6 cells RevUp 11 .d increase total lift Wing tips reminiscent used Bellanca Wittman Digital charger allows precise monitoring 100th volt Peak charging reads approx 105 volts R mile flmnihor romnmmande rhnrninn to SW nor rail e,ffiriont fine anon flvina tional use on/off servo microswitch locate compart ment controller shown enjoy glow-engine power build Electrics too find both essential find Electric pleasant addition allows fly ways places otherwise would difficult impossible Electric missionaries bear down Electric silent nearly dont need heavy field box can park car nearby dont need wipe off airplanes flip switch fly Youve heard litany Basically true However some needed things no air plane can fly some effortbelieve Lets translate real life Depending design kind fly ing like propulsion sys tem may may able fly Electric wherever want fly some funny places Like Rubber Gas energy limit plane big tank can fly RC day turns Beautiful rubber-powered flights made relatively short ex penditure energy Electric has its own spectrum can cram Electric full batteries high-rpm motor climb like rocketand dump energy couple minutes can design high soaring flights gentle performance expending energy over 5 10-mm greater period range design performance goals wide indeed mood strikes can let LeCrate take off street have 30-mm Left Nose parasol version shows removable cowl made aluminum printing plate cabane structure access hatch compartment charging iack switches connectors Jomar speed controller shut-off servo may substituted latter Right Opening provides access battery cooling air flow later opening enlarged per plan Has torsion-type landing gear Left Beneath tail see horns shortened clevis rods attach 3/16 sq firm balsa pushrods Right Center wing section cutout sacrifices bit drag sake whimsy Original wide trailing edge scalloped save weight narrower TE per plan adequate 34 Model Aviation Don SruH gently eases LeLrate tne air witn MIII vvinter controiiing tetti site witn deep grass paved surface takeoffs automatic needing control input cabin version has better spiral stability parasoldue added side area NO OCR TEXT Left Top longerons glue sides top nose sheet Jigged two clamps Lite Ply main former self-aligning Note bot tom longerons laminated through cabin area Right After spruce cabane precisely assembled over plan index-marked align fuselage top side clamped place gluing note ply used prevent clamps marring structure r soaring flights some out-of-the-way fieldflying sites everywhere School yards athletic fields occasional parking lots convenient airportssome less four blocks away People dont notice flying kite equally non-offensive Joggers circle track kids play ball no looks up ignored An occa sional kid becomes interested Trexler air wheelsthats share flying two other guys doing same thing have low-key flying session no different Rubber Scale except far higher degree performance does eliminate glowit adds Electric unique offers thousand-in-one combinations dont build anything because Electric design opportunities zeroed 05-size motor currently popular sport flying Ive seen OSs zing little crates like Goldberg Ranger 42on direct drive start enjoying lazy Gentle Left Alternate nose can shaped soft scraps preferred Ply nose ring lies behind front scraps slots cut take aluminum motor mounting tabs LR-50 motor Right Nose rough-sanded shape motor being trial-fitted Take care avoid thrust setting left up Thrust-line adjustments can made inserting thin shims between tabs nose ring Power system hooked together pre-installation check Six sub-C-cell pack rear Jomar controller front battery Holder Radio Shack 20-amp blede-type fuse soldered positive motor lead using shut-off servo microswitch required 36 Model Aviation Left Single full-depth 1/32 ply joiner clamped glued main spars wing panel Right After blocking up first panel joiner attached opposite paneL Its good idea study pictures plan Hank Clarks cutaway before getting started Left Center section pieces glued place Front cutout two pieces solid block Right After center section has completed leading edge gussets diagonal grain added Note diagonal supports between spars vertical-grain sheet webs behind spars Left Stabilizer partially assembled Note thin ply rib template ribs still stacked after sanding Notches will cut Zona Saw Right Completed stabilizer Elevators have assembled aligned cutout area Center ribs form slot vertical fin Lady Drifter etc same combina tionthats ideally 7-3 7-4 nylon prop also have seen 05-powered planes way scant 300 squares up 720using various gear drive ratios turning giant folding props 4000 rpm fans produce enormous thrust reduction Playboy 11-7 majestic easy-tofly slow high climbing ship snares thermals has 570 squares Srulls Electric Sparky 460 squares superb machine 05 using everything 11-7 up 20-in high-pitch folder ratios 2 1/2 3 36 homemade 5-to-i set stage LeCrate design presented know fun see Design objectives like watch planes fly own may like aerobatics requires Free Flight stability maximum motor run time excellent glide Le Crate would have climb steadily least 5 mm reach high altitude high dares go wing loading should compromise floating slow circling glide lift seeking cause fast approach speeds Duration capability 10 July 1984 37 mm Drag should great enough cause high battery drains due hard working overloaded prop prop should able unload air Since generous area required duration minimum gross weight plane fly slowly relative minimize drag chose 58-in span chance resulted same area Electric Sparky460 sq Since scaling-up classic Rub ber job Don Srull did Sparky could use smaller fuselage stumpy landing gear enhance slow glide resorted Free Flight experience calling large area lifting-type stabilizer aft center gravity CG Sparky has 10% airfoil sneaked up 13% Antici pating possible publication parasol con figuration chosenala Q-Teejust interesting plane capable automatic dont touch anything takeoffs easy hand launching high grass very confined sites offer builders choice parasol cabin both design executed permit building parasol adding simple sheet balsa cabin requires cutting short parasol mounting rails make change can build way change build cabin begin parasol dihedral given will require much use rudder stickthe cabin spirally stable will fly hands-off betterwith occa sional rudder inputs needed hing 3/18 GUS SE TSLEADING 3/18SO ON =_ RRIIC RIB#3 S/325HE01j~HI\ YRIWDI I/4GHEEY-- /LAMINATE\ I\II /I/4SHEET / LEFT WING PLANtGOOOHK --iu 30 LIGHTEN Ia#3 IRIGHTON CABIN VERSION ON PARASOL3/16SHEETIM03/ISPRUC GM HOGSTYPICAL rC TA HATCH POS ONISEE BELOWI/ 38 SOF BA GAPLY RON RAE_ SSASIFHR3/IN HATCH OUTLINES~_ CUTOUTAFTER [i MBLY IMPROVIHO PROP PERFORMANCE II3SPLY.IHUTCH1/ ~R 3/IHSHEET SECTION3/IA SI/A CBALSA 3/32 PLO-K2~ 4V0/IH1j GEAR PLATE POSITIONCUT OFF ON CABIN VERSION THIN ALUM HOOS.~INCIOENCE 1 CR0 JACK N IWI3/IASPCS 3/16 SOFT BALSA3/IBSOFT FILLI N/I0ANS 3/32PLY AJ POSITION AIR INTAKE. -2 MUSH COBBE3/I6SOFT SHEET FILL FOR SHAPINGNYLON HEATOINK ON I/NI PLY /i~ S/IS SHINJOMAR CONTROLLER3j SORESfill IALTIRSAHE SHAINI HANSLANSING GEAR I/I FRONT STRUT II/IS CRASS HAlING TRESLER CS WHEELS0 ALTERNATE WHEEL CONSTRUCTION up circling diameters first three flights parasol 6 mm plus 8 mm plus 14 mm plus Normal dead air times after sundown cool heavy airon 5/2-min runs six-cell pack 1030 1045 total glide time almost equal motor run time bad especially using 1 l-7/2 nonfolder may eat up much 40% 38 Model Aviation Bill Winter snapped cabin version after 46th test flight seven-cell battery 2Y21 geared motor driving 11-7 Rev-Up prop Near press time author trying cobalt 05 direct-drive 74 prop getting 8-min-plus flights LR-50 mo tor geared 381 14-10 folder expects get flight duration 14-mm range start parasol version convert cabin airborne radio gear will located upper cabin Note parasol rails have cut off front back Full-Size Plans Available. See Page 176 FRONT SPAR\$~SQ ITOP B BOTTOMI -= /1 I/32SHEET BRAIN SPARIIiII HEAR SPARS/16SOTOP1/ASO TOPONLYIrTI~ 3/32SGN BOTTOMALL RIGS 3/35SHEET S LEFTSCRAP A.PANEL TRAILINS EDUEIAU3/4 _____ IBDREUj~ TOP VIEW 3/IA SHEET rE / TE SANDED FOR WASHOUT DIHEDRAL SI/H AT TIP RIB EACH PANEL3/I6SOFT GUSSET SN BOTTOM ITYPICALI- 3/IA 55 V -rFILL OPEN ELEVU- - 3/IASUFT/MED BOTTOM SPAR TO TIP ITYPICALI 3/DUSHEET // ROCKET CITY NYLON LINE RINSE HOT STUFFED /TIP RIB S 3/16 SQ HARD OR MED I/4 SOFT 3/32 HARD HORN POD ITION FIN INSERTS [I FILLEH BLOCK I/32WEB 10 I FIRST RIB ______________ 3/16 55 AM NA ESPEN 072___ 1 URILLINACABIN____ ______WING JOINERI/32PLY UEAR PLATE-S/SOPLYITOPVIEWIIFRNG SPRUCE SUB C SANTOPRUNYTRIM UPPERDOWEL DELETE UN IIVERSION________ U OR BA ER ESL 2I/IBPIHHOOD_____ S— ______________________________________TEMPLATE AT SECTION AHOT STUFFED BOTTOM VIEWBRACKETS UCKET CITY STRIP HINGE SHEETING 1/4LNTORSION-TYPE SEAR3/IA SOFT 3/3D SHEE Th_ ADD SN CABIN VERSION-.W/3/IA SO I/HSS SPRUCE RUDENOTES CRONSPIECE3/32SQ DIAGONAL WRAPS TH N W RE AR r- NI PUSHROSSSNUERUNS B UPR UNTS ~LiVOS 3/I 3/IA GO BA SA THIS SIDE ONLYI/IA SHEET MED THIS SIDE ONLY MTO BAYTSSANTO RSUBC-- bGELAMINATE TWOSIDE VIEW 0/16 3Q06 BUTTUM RAIL REMAINS3/32 SHEET SIDING/ 3/1653/HOUTEREDGE[ CABIN CSNVERSISN-TOP VIEW -A 3/I KSUFT SHEET I SECTISN E SECTION 5 ______________________ YFUSE SIDEII3/IASHEETI/IAPLT IfU3/IBSI/S DUE REMOVE FOR BATTRY GERVICEHOUR3/32 SHEETBURT BUTTRUBBER BAND BUTT E BLO 3A6GO BAND STOP Xe6XaLe NIGHLY EFFICIENT ELECTRIC AIRPLANE DESIGNED BY BILL WINTER SPAN SHINS AREA465 SQ INS WEIGHT3A ODD POWERLEISURE LYSO ELEC MOTOR S VOl RATIO PROP REV-UP IIDU7P SR IIDU7LIDP TRACED FOR MUARI AVIORIUR BY HHPD CIAIIBO IS/B3 potential glide time 90-degree humid day total time off much 1 /2 mm full-scale stuff raw-truth aerodynamics never perceive almost unlimited glow-engine power reserve fuel about weight good range 05 electric motor considered 35 45 oz make things real test used Ace Bantam receiver Bantam servos minis Still weight 39 oz six cells After changing cabin usual wear tear became 41 oz plan shows World Engines mini servos use use mini receiver well will come out close 35 oz six cells use 250 mAh re ceiver pack good condition provides over 60 mm flying timeactually since use two servos very little controlling little servo drain good 100 mAh pack will yield about 40 mm should change such packs dur ing flying session use field charger especially after long soaring flight usually wont fly longer 30 mm Continued page 40 July 1984 39 LEFT SOFT SCRAP FILL Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No202 Air CleanerFine Replacement Inserts Cat No 104 Pkl2 Inserts Coarse Cat No 204 Pkl2 Inserts Fine $225 $225 $195 $195 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Add 75 shippingMichigan residents add 4% sales tax Bru Line Industries Inc po Box 3786 Center Line Michigan 48015 AlTENTION Fliers Modelers Collectors Special prrce Reduction Sale Following Ross Line famous Multi-Engines isa final Close-Out No Ross engines being produced nor will have molds dies jigs have Ample Parts Stock Future Servicing Fine engines In-line 4 cyl 6 cyl personally assembled Lou Ross personally engraved signature crankcase always wanted Multi-Cylinder engine now time buy DONT DELAY GET YOURS NOWIMMEDIATE DELIVERY Engines Except In-line Twin Come Mounts Exhausts Engines Have Plus Prices Are Postpaid Insured Engines Only Good Collector s Items Are Great Flying Engines JIMMY ROBERTSON 0 ROSS POWER 35 Stonecrest oseph MO 64506 Phones Home 816/279-1127Work 816/232-4491 CSI occasion might want soar hour moreso watch Motor prop use Leisure LT-50 05 2/2-to- reduction gear box stage plan shows used standard six-cell pack comes Sanyo batteries Sub-Cs Prop Rev-Up 1 1-7 also has flown 1 l-7 11-7 deBolt-reworked RevUp 11-7 removes material around hub streamlines root undercuts bit near hub thins blades uses sharp edges tapers outer tip slightly rounds actual tipit does unload gives better climb limit motor run six cells 5 /2 mm high altitude impossible know motor power fades takes long time before can detect loss alti tude lift will deceived must time motor run have used six mm occasionally run too long batteries will overheat Further want have reserve power extended approaches go-round too high 5-mm motor run safe Gross weight does tell full story Equally important ratio battery weight gross Srull probably will pub lish test results am privileged use data equipment measuring rpm current drains simultaneously motor prop combination possible select optimum combinations motor prop batteries given design bottom line percentage battery weight gross 20% minimum reasonable performance might fly less 20% bit doggy optimum per centage planes like LeCrate lies between 25 30% difficult obtain 35% though sailplane type might reach 40% example 30% battery weight LeCrate 35 gross would 10 oz 45 gross becomes 13 oz However flew seven cells found plane getting diminishing returnsunless folder used also flew Astro Cobalt 05 direct drive 7-4 nylon prop seven cells used final tests LT-50 Pilot technique As far described Le Crate amazingly insensitive trim using 1 l-7/2 regardless CG range shown big freewheeling prop dampens out sorts things big non-folder find cut power can immediately apply full up-trim merely keeps glide speed accelerating As glide possible gradually add back stick forward CG until holding both full up-trim up elevator Normally too slow glide always has higher sink rate anything near mush point good big propit will freewheel against drag motor magnets fast enough hear drive gears high altitudeany faster airspeed spins dead prop rapidly glide tim cut 50% slower glide big prop higher durationunless 40 Model Aviation ILLa 13311 Beach Ave na Del Rey Long Engine Life * * Use BRU LINE Air Cleaner Opposed Twin 60 cu In-line Ross Twin 60 cu Opposed 4 cylinder 120 cu opposed Ross 6 cylinder ioo co 5295O0.Now 515900 5495OO.Now $29500 59950O.Now $49500 Was S2995O0.Now $159500 use folder folder will always fold unless motor stopped freewheeling prop can stopped either projecting inner Sullivan rod shut-off servo motor brake resistor takeoffs climb-out couple clicks up-trim set before flying may need occasional tap up-stick after launch Once up speed climb steady hands off find best allow very large left climbing circles think left circles climb better right before heading straight upwindvery important turbulence upwind trees its lifting tail plane climbing appears level flight set bit up-trim accomplish slight climb attitude Dont try steep climbs allow model hang propthis produces higher battery drain shorter lower flight As plane climbs high say 3 mm have passed remove some up-trim reduce climb angle slightly find allows longer motor run Since will compelled circle times under power because plane does travel far use circles locating lift Frequently find lift before power gone can shut off motorleaving good reserve after losing thermal continued climb lift search confine plane desired sector flying site search lift adjust rudder trim rightI find right glide turns effective left finding using lift Dont slow plane ex treme lift fairly fast glide best purpose too overbanked diving around downwind side circle strong lift matters less freewheeling prop minus get glide trim established both elevator rudder go hands off using rudder widening tightening circles lift plane locks natural circles could put transmitter down cabin ver sion cabin version tends glide straight upwind after losing thermalthen tends turn slightly either right left de pending nearness lift getting lift again will go back auto matic right turn have left trim alone have no explanation whatsoever see no duration changes flown either full-forward full-aft CG However front position requires up-trim glide may reach full upelevator time passes rear CG posi tion less trim stick involved pos sibly no back stick An interesting thing happened tried seven cellsalso moving CG aft position shown plan power cut two three clicks up-trim requiredsuggesting perfect CG could lie aft 50% chord point Since glide long has minutes play before thinking approach use period continue wide circling someContinued page 42 PAR ROW HAW K 1/32 SCALE PLASTIC MODEL KIT Send Si complete catalog kits accessories Dept MA WILLIAMS BROTHERS INC 181 PAWNEE ST SAN MARCOS CA 92069 Twelve page-Fully Illustrated complete detaw MUFFLERS ENGINE MOUNTS ENGINE TESTING EQUIP SCALE ACCESSORIES SMOKE KITS ETC Send *1 00 Catalog Eli iii ii I BIGE SpcificAiuofts Wqpo84 A2069. Aol Wjbb.dy P00EURA ZENOAH oORIAORA PbaupciIy AicI ,qA birq cud ado odod,q yoc bi E.yobild.20boshOboO CuacocdAodlloqokRlCEwa sod0q lo.q lolw .d WdAq qua locoo qE Ad. pdo.d iotA l.qA .A dck ,qodoolcolb.coqbodopbca FlblcIlpooibpOiiOpO0 UNloc o01 aoocboo aab. llcl.oo 8 1012 dl boA., ocp Al oloil aooablo bollofop0y i. ThE NEW UPDATED E & L ZENOAN EPiqiriE Zuoob Accoool. l IPRECISE RIUL VibRAtioN book pdoud lo,ulclcd boloaclac oC.A co.poooioo 010 odilkd all. opoodiioqcAcooooa0Oiad48OOdt~Orooiiktiia 51895lkoq olId R.l pop dollSpacilicoioac 228 CID 2-cock pbooo pood iqoiko qo aqio 40 lb ,uobockRoll bodoq 084 pA aol plo2 piooa iq Tp,doluaioaQUADRA bock plo 81895 Pooadtll Thoo0 lklOpcpoi 1800RPM 55 SooobMcblOOibO0OAAObOlOOCld Ooll boll bokaqcookOloli Solldoo, qokjo oc poiia Wiqlo41b 200cc EooyloodoOciq VISAI & L MASTERCARD 8681 Eo Lodo to. SconOdob July 1984 ii US Navy Sparrowhawks operated two dirigibles aircraft carrier during 13Us among colorful aircraft aviations Golden Age KIT FEATURES U Decals permit finishing model six different Sparrowhawks Two types wheels hard flexible tires U Monofilament rigging U Detailed interior NEW FOURMOST PRODUCTS Bulk head Fitting simple method feed fuel vent tubes through solid bulkheads Drill hole No 18 drill size bulkhead firewall up 3/8 thick Provides sealed tank compartment eliminates fuel line chaffing Color coded easy identification7 MOULDED NYLON FUELPROOF Weight /zGM EACH Size 3/32 10 PRICE 2for$250 FOURMOST PRODUCTS 4040 24th Ave Forest Grove OR 97116 Bomb Release Fourmost Bombreiease mechanism isa simple light weight device ideai fun-fly events Fasten unit plane screws provided Attach spring-loaded latch thread connect throttle rudder servo Corrosion problem unit molded nylon sprIng stainless Weight 1/10 OUNCE PRICE $250 503 357-2732 times encountering lift again down about 200 ft glide back forth 90 degrees line sight always keeping nose slightly crabbed wind never turning downwind about 100 ft go wide downwind leg coming around continuous curve onto ap proach intended low altitude prevent overshooting add touch power drag ship just enough assure hitting spot Jomar controller Although sev eral electric motor throttles controllers market Joe Utasi asked evaluate described MA arti cle produced Jomar replaces third servo normally required motor on/off three-position means microswitch use on/off altitude control landing patterns touch-and-goes late land ing approaches tiny steady crement rpm can added tooled will Very nice Also use turn ing motor takeoff hand launching model high air slow stick movement controller minimizes gear strainwhich can serious bang-bang on/off power driving big props vital use specified diode directed across motor Seven Cells climb speed rate higher course controls solid LeCrate find no duration improvementI suspect bit less have used 2-to-l 3-to-i gearing Rev-Up 11-7 l-7V2 respectively 38-to-l same Leisure deBolt reworked Y-O 12-7 propbut find added weight cell produces faster glide 460 squares drives prop faster freewheeling goes potential point model should have folder Also shut down 5 mm begin worry 4/2 mm rather 5/2 done six cells Dili gence must exercised slow glide seven cells bigger nonfolding prop sink noticeable compared six cells shows watch Cobalt 05 Direct drive nylon Top Flite 7-4 really hums seven cells sur prised after hand launching plane faster solid power performance could shut off about 5 mm approximately equal high altitude would take prolonged testing two people determine difference total time big selling point cobalt motor ability its brushes handle heavy drains Thats big competition great power demanded shorter motor run noted less battery drain comparable reduction-drive arrangements similar props spells longer motor run poten tial find direct-drive Astro Cobalt 05 quite acceptable LeCrate can consider new Super Ferrite motors too particular sleeper Continued page 139 42 Model Aviation ASSOCIATES INC 21658 CLOUS WAY ARD CA 04545 753-4868 p06000 SI 8080080 SCALE 0140455 SAYS OSEN 000 FLY TIlE 0600160 FLY ISIS TOLD ME 501 SIztteries Hot Line Save new Hot Line phone number order ask technical questions about finest RIG battery packs made Call Monday Friday between 9 am 2 pm Eastern time now accept Visa MasterCard UPS COD orders 1# SR Batteries Inc Box 287 Bellport New York 11713 Bob feels Quadra Q5OX glow engine looks almost naked flywheel mag neto glow power up weight down higher fuel costs King 70 In-Line Twinand another view new Waibro carburetors Instead choking press flexible clear plastic bubble prime engine lumbus OH 43220 B&B Specialties 14234 Cleveland Rd Granger IN 46530 Balsa USA PO Box 164 Marinette WI 54134 Byron Originals PO Box 279 Ida Grove IA 51445 CB Associates Inc 21658 Cloud Way Hayward CA 94545 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Don Harris 23668 Shadow Dr Auburn CA 95603 Homer Salqs Inc 300 Dixie Hwy Beecher IL 60401 Wendell Hostetler 1041 Heatherwood Ln Orrville OH 44667 PK Products PO Box 6226 Hayward CA 94540 Sig Mfg Co Montezuma IA 50171 Sullivan Products North Haven St Baltimore MD 21224 T&D Fiberglass Specialties 30925 Block Garden City MI 48135 SEE THE STATE-OF-THE-ART IN ULTRALIGHTS AND RADIO CONTROL INDOOR EXHIBITION -STATE OF THE ART MANUFACTURERS DISTRIBUTORS DEALERS HISTORICAL CLUBS & ASSOCIATIONS SSION Adults$400 Adult two-day pass$600 Students & Seniors$200 Children$100 BEER GARDEN BIGGEST LITTLE AIRSHOWCOMP~ 0FF-ROAD RADiO CTRCAR RACING ___EXHIBITION _________ TIMES SATURDAY 930a m SlOpm Flying llOOam &200pm SUNDAY 930 5 00 p m FlyIng 2O0p 3 HOURS FROM DETROIT 1 HOUR FROM BUFFALO HOUR FROM TORONTO CONTACT FRANK OR VICKI ANDERSON 416 624-5922 DAYS 27e-527e EVENINGS MAIL TO 495 MEADOWS BLVD UNIT 1 MISSISSAUGA ONTARIO CANADA L4Z iHi US Quadra 1032 E Manitowoc Oak Creek WI 53154 Nick Ziroli Models 29 Edgar Dr Smithtown NY 11787 LeCrate Winter Continued paqe 42 Astros 05 075 identical order six cells have 05 seven have 075 think will very well beCrate either directit turns 8-6-or reduction Using belt gear reduction techniques guys Electric experience probably can obtain duration performance boost 25% over what plane currently does use Don Srulls prop techniques shown past Fun column high reduction ratios know runs can exceed 13 mm Manufacturers wont believe have timed Dons planes know glide LeCrate totally different airplane direct-drive motor seven cells installed tiny 7-4 prop reduces Continued page 142 BY SOME OF CANADAS TOP FLYERS SPONSORED ST YOUR HOBBY ULTRALIGIIT INDUSTRY MODEL AVIATION ASSOCIATIONS CliCK-TV 11 & CABLING OKEEFE LOCATION GLASS CLOTHO6 oz Lightest best covering glass clothO6 oz/sq yd SatIsfIed customers 49 States 6 24 Countries 15 ft $2090. 30 ft $3660 35 wide K Postage pd US & CanImmediate shipment Check MO. MasterCard & Visa welcomed DAN PARSONS PRODUCTS Dept 11809 Fulmer NE Albuquerque NM 87111 1505296-2353 July 1984 139 ULTRALIGHT DEMONSTRATIONS MODEL AIRCRAFT FLYING SHOW T jgB4 NELSON RECREATIONAL COMPLEX 4235 NEW ST BURLINGTON ONTARIO CANADA Jim uum P-40 CARD KIT FULL COLOR EXACT REPRODUCTION $500 REMEMBER HOW ON YWELL THEY FLEW lItAid.SpaRhi BR. IBdodos 5sep05 rsis5ie l..9eIanrs siB4 ci haM pdse Sced Ml seeMs 4dtAk4 5sf FIB MsdIB-PO BBs 52 intl SNIOUS ROBTALOIC OFT SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS *IN EPLA-TECH 1984 AIRPLANETERNATIONAL CATALOG48500 MC KENZIE HWY $300VIDA OREGON 97488 LeCrate/Winter Continued page 139 drag greatly glide crisp faster Without big freewheeling prop strange damping effect disappears Instead being insensitive trim elevator controls become quite responsive necessary fly precision avoid partial stalls trim first two test hops direct-drive 05 showed approximate 8-mm total rather good seven-cell weight Notes If wish gild lily ways used center section cutout cosmetic reasons turbulence loss however Consider running trailing edge TE straight across nothing stop playing aft cabin profile running top longeron down tail starting TE cabin rear top longerons blended razor-back drag would go down still also improving airflow over vertical tail Trexler air wheels high drag However no seems make decent wheels Electrics suggested low-drag wheel shown plan wish ultimate use type wheel elect use really big folders extend landing leg lengths suit mentioned touch power may prefer three mini-servos switch motor off advisable big prop especially seven cells use three-position switch dont go abruptly full off full can tough reduction drives say troops As construction sure use Lite Ply shown dont alter wing joiner thicknessit standard As ply assured light construction will stand up have hit CB over paved parking lot thought ship goner flew after next charge Unless im pact nose steep angle mild crackups should necessitate minor repairs such case power pack battering ram well suggest sticking six-cell packs plane unless experiment things like big folders Bring cell voltage up 14 16 apiece find peak charging worth bother shortens battery life unless done frequent annoying trickle-charge periods keep batteries equalized seven cells charger probably needs resetting obtain charge time means have monitor charger avoid battery dam age 12-volt car battery may able peak seven cells also recom mend installing fuse power circuit regardless what anyone sayseven three servos allow quick shut off have radio failureand have happenyou can lose works dont have fuse have exotic questions about Elec trics try columnists have ques MOD-LERM AFOR DABLE MODELING ACCESSORIES SOCKET HEAD SCREWS W/WASHERS No0284-40 x 5/812Pk$ 90 No03B4-40 x 3/412Pk$1 00 No0786-32x3/412Pk$110 No0886-32 x 112Pk$120 No1188-32 x 1-1/212Pk$1 55 BLIND NUTS ANDLOCK NUTS No1284-40 Blind12Pk$ 95 No1486-32 Blind12Pk$110 No1588-32 Blind12Pk$125 No1684-40 Lock12Pk$ 45 No1886-32 Lock12Pk$ 50 No1988-32 Lock12Pk$ 55 NYLON WING BOLTS No 2088-32x1l2Pk$ 80 No 2188-32 x 11/212 Pk$ 90 No 23810-32 x 1-1/412 Pk$110 No 24810-32 x 1-1/212 Pk$135 No 2681/4-20 x 1-1/212 Pk$210 No 2881/4-20 x 212 Pk$250 No 3081/4-20x312 Pk$298 PROPSTOPPER 45A Sturdy flexible vinylplastic finger guard Protects against Cuts bruises starting engine Package contains 1 small 1 medium 1 large$150 SILICONE FUEL TUBING 60A332 Small Medium 3 Ft$175 61A18 Medium Large 3 Ft$189 14ODEL KLEEN 75A2 ounce package makes full gallon Removes glow gas fuel residue Mixes tap water Spray wipe off soft cloth paper towel$1 98 00 less $150 shipping over $1200 free shipping Ky residents add 5O/ sales tax CODs cash add $125 MOD-LER POBOX 70 McKEE KY 40447 Write complete price list Dealer inquiries welconie MODEL MAGIC FILLER Balsa Foam Fiberglass Quick setting Sands like balsa Non toxic Easy use Light weight Non shrinking SuperiorStrength Adhesion & Flexibility Compatable finishes & coverings Model Magic Tips Month 1 Repair BJ Sureflite other foam floats MMF 2 You get what pay 5595Rnfit 9 ft n70 od Model Magic Products PO Box 7784 St Paul Mien 551i9 715 425-1397 FilletsGap fillingDing repair See dealer first write call As Seen Toledo New Model Magic Products Model Magic Epoxy Plus 2 Part 8 Mm Use anywhere two part epoxy used Light weight Sandable Carveable Excellent Gap Filling Non Sagging Superior Strength 6 fI oz$895 lOfIoz $1195 NAL PERSOHAUTY TRAINER BEEMS BEAUTIFUL SUPER CHAMP Power Soar New Heights LT-50 GEAR MOTOR Leisures Gear Drive conversion 31 powerful LT-5O develops up 2 lbs static trhrust Gear Drive also features ball bearing Delrinlbrass gearing glass loaded polycarbonate housing Send self-addressed stamped envelope catalog ap plication notes Leisure 11 Deerspring/IrvinelCA 92714 THE BEGINNERS KITTEN AND EXPERTS TIGER Revolutionary snap-on wing eliminates bolts sr rubber bands Csmplete kit $5495 dealer dired GEMINI MODELS INC po eax se Pwsac NJ 07055 142 Model Aviation SHIPPING AND HANDLING 84 Page CATALOGUE Up $800 add $150$200 PP/Sat Class $801 $2000 add $225A copy will sent $2001 $4500 add $300 free-when requested$4501 $7000 add $350 order over $7000 add $400HOBBY HORN CA Addressees add 6% taxachobby specialtiescO Send MO Visa/MC#Exp15173 Moran Street Al Check allow op 30po Boa 2212 days check clearanceWestminster Ca 02883 CODExact Charges 714 8938311 Hdl Cash Only[AIl UPSI714 0051203 INTRODUCING THE NEW FOX 29 BB Bore732 Stroke715 Displacement299 RPM 96 prop.. 14000 Weight9 Ox Fuel ConsumptIon 5 ox mm Fox Schneurie 29 brand new replacement popular Baffle 29 todays modern technology latest model Fox 29 produces half again power older 29 does little no nitro new 29 interchangeable earlier model Fox 29s Isnt time trust model powerful new Fox engine 23000 Fox 29BBRC Schneurie$5995 13000 Fox 29BBCL Schneurie4495 90236 TiItup Muffler1495 90237 TlitDown Muffler1495 F OXMFG Co 5305 TOWSO14 AVEFORT SMITH ARK 72901 MasterCard Visa Accepted tions about LeCrate equipment used youll get quick answers After did Dont make head-to-head Com parisons glow engines Electrics LeCrate am living pleasant double life Radio Technique/Myers Continued aie airplane engine reversible-pitch propeller such T-max 13W T-min Beyond need two-position propeller-pitch control transmitterand would also nice have additional detent throttle mark throttle setting level flight chosen design speed 60 mph example test purposes tried RC-Ver stell-Propeller J Landert CH-8625 Gossau TeL 01 9352681 bought somebody Toledo Show 1981 according date marked box may still avail able know seems im ported Germany 11 inches diameter changes pitch 1- 15 de greeS importer still business let know Ill pass Weve finally come Turnaround transmitter Fitted Curare controlled Landing Gear switch act like two-position propeller Landert propeller gave chance test theoretical Turnaround trans mitter Let comment kept pretty busy learning fly propeller airplane same time order avoid changing propeller pitch full throttle tried school myself Throttle Down flip propeller re versing switch Throttle Up reverse pitch dive Throttle Down again initiate pullout Throt tling Up detent filed throttle-stick ratchet level flight lot main thing learned need lighter Curare Other worked thing sure made very careful landings sure dont want damage prop anyone now thinking seriously about building Turnaround transmit ter suggestion implement Propeller Pitch Control two-posi tion affair End Point Control simplest way can think to use Buddy-Box-type pushbutton Channel 5 Ace Silver Seven trans mitter setup insures pitch wont changed accidently some fooling transmitter new RC systems have End-Point Adjustment EPA Auxiliary controls could used same way George Myers 70 Froeblich Farm Rd Hicksville NY 11801 SAILPLANE LAUNCH EQUIPMENT FOR EVERY FIELD SPORTWINCH $225 0 * $300 Q9 * z inc1isd $350Q9 * $250 QP * * ptus shIpplg source QUIET FLIGHT supplies hi-starts electric motors& reducers batter ies pa rachutes tow line drums accessories braided nylon line selected kitsthe PROPHET sailplane kit moreVISA MASTERCARD DAVEY CORPORATION SYSTEMS ONE WOOD IANEMAIVERNPA19355 215644-0692 6772 Write call information aiy mat inc1ed July 1984 143 H0rn Wing Span-796 Wing Area--564 Sq JVEfW / 0~ SENSOAR glider HOBBY HORN Eaclasive HOBBY HORN Kit SENSOAR Glider kit high quality kit Machine cat 8 sanded parts Select quality balsa end spruce Detailed plans written instructions Far THERMAL SLOPE ar 05 ELECTRIC POWER VALUE PRICED 51600 IrThR KflS Pull au3 Partial Kits P & Semt-Kto Combined full stripwood plan Now intl Wire Window etc Mat fNole rhese may purchased lust semi kilo will planswrite call tsr prices 1936 Succaneer-f4-SI1 1938 Clipper MIt I-72--$30 1937 DaIlaire Sptaer109061 1941 Ranger48 027 1939 Mercury72$16 1035 MIss America94$19 1941 Playboy Jr -14020 1041 Playboy Sr00$46 1938 Pacer House94R43 1040 Sailplane70- $74 1940 So Long50$18 1039 Trenton Terror-77-S32 1930 Zlpper04049 1030 Korda Wakelleld44 037 MWWAY MODEL CO Semi-kits Combined w/strip 1936 PlyIng Quaker-04-040 3937 Quaker Flaah-6T$30 1937 Long Cabls79$42 1937 Air Chlaf61-841 STRUCKS 1540 74 Span 835 Sq SEMI-KIT Plan IncIl--033Oa flaw ruler Combo Full Kit $6300 ~ALPLANS DRAWINGS 510 HEINKEL HElOOD 62 63 sTOoo P OWR TOW P0W P Z 0DM RETRIEVER