Radio Control: Soaring

Radio Control Soaring Byron Blakeslee UPDATE During IMS Show Pasadena January US F3B team members met AMAs Executive Council industry rep resentatives Reports meetings very upbeat positive Depending upon funds raised good chance team will have eight membersthree previously announced very important because AMA contest success rests 80% pilot 20% plane World Champs its like pilot plane support crew flight two winches have put out working time flight time must tracked re-launches must considered doneplus other planes flight group have monitored see doing pilot has concentrate flight cant distracted trying manage too takes lot organizationand good well-trained people guys will great job can support team purchasing team pin $5 patch $10 best both $15 contributors will eligible big sweep stakes drawing will give away lots really good prizes merchandise list yet com pleted well print soon available Please send check F3B Soaring Team PO Box 9328 Albuquerque NM 87119 As buildup F3B World Championships column will devote quite bit space F3B think F3B boosters will find some things interest first item letter Trey Wood Daph ne AL has some thought-provoking com ments about getting F3B competition par tial answer Treys prayer provided John Wyss piece launching John lives Boulder CO familiar term F3B world-class intemational competition Sailplanes consists tasks Thermal Duration Speed Distance See pages 102-105 1986-87 AMA Official Model Aircraft Regula tions complete rules designation F3B assigned Federation Aeronautique temationale FAI Treys letter people write columns maga zines always saying want modeler input will have some idea what put articles decided write unload After being fairly successful locally AMA contests decided F3B next step 79 Nats Lincoln saw very first Sagitta given Skip Miller told Lee Renaud might sell prototype kit called did did believe 1980 went Texas compete elimination rounds F3B didnt go Finals because dis tance didnt think really good enough Two years later went Finals Jotiet IL During first round drop out radio problems What Im getting AMA contests F3B elimination rounds everyone willing help anyone needs wants help things have always enjoyed about flying Sailplanes guy first place contest will help guy second third best can Ive seen many times F3B Finals its cutthroat man himself Since no F3B activity area AMA Sailplaners quit rely wife brother help guy Finals helped wasnt flying repaired crack fuselage tried convince stay competitionusing backup plane Everyone else seemed too wrapped up own psycho logical warfare true champion though Dwight Hol ley went spectator 1981 World Champs Sacramento CA standing near tent watching Dwight work Gobbler wanting distract him too much asked short simple question about hinged ailerons surprise put down model opened toolbox gave hinges gave name address someone made jig make hinges winners 86 international Postal Challenge contest L FSV Versmoid West Germanywith theirtlying wings Reinhard Werner saysthatthetwoweird-looking experimental models centerwere allowed toflythisycardespite some uglyserodynamic appendages rear FSV Versmolds flying wings being launched R 86 Postal Challenge Details column 46 Model Aviation Tflree sample photos trom Scale Model Researchs 25-picture packageof 6E Photo-Peaks specifically selected assist Scale model builders column get deal price list special homemade tool required make brass hinges midst World Championship Dwight found time help someone else real champ realize competition fierce F3B contestants cant expected help everyone else what about guy might best pilot represent USbut doesnt get try team because doesnt have necessary backup personnel F3B pilots take own helpers Finals go World Champs too Another problem technical info still dont know what arrow-shaft hinge 1 read magazines pick up tip hint can Im still missing lot informtion source deals new construction methods ideas seems lot talk about lack interest F3B US believe people think F3B just too much trouble takes lot people equipment just practicemuch less run contest dont know what real problem dont take poll ask comments what modelers dont like about F3B would interested know what other fliers cite reasons participating F3B First glad hear Treys comments about Dwight Holley Dwight winner Sacramento World Championships Trey men tioned may have missed small announcement February Model Aviation Dwight passed away business would closed Bob Kopski lot say RC Electrics column March issue Over past few years Dwight gotten interested Electric airplanes built up quite retail business field Dwight longtime Sailpianer very successful East Coast competitor As Pete Carr said Dwights skill consistent people would say either spent 10 minutes looking lift 10 min utes working lift Either way Sail plane would lead rest us first flight final standings will missed Second Treys comment people US think F3B just too much trouble has undoubtedly hit nail head F3B com petition lot workand costly boot top technology gap Trey alluded takes lot time trouble find out whats hottest planes radios winches etc means either invest thousands hours lots money developing com petitive plane Rich Spicer group did Synergy program buy known com petitive plane Peter Muller Germany $500 per copy Steve Work Fi nalists Minnesota went latter route simply because relatively less trouble either case person must very gung ho about F3Band have pretty deep pockets previous paragraph notwithstanding F3B highest form hobby/sport very demanding very competitive therefore definition arena ardent skill ful players can compete liken F3B flying Indianapolis Formula 1 auto racingI like watch dont expect drive Treys idea poll find out modelers F3B interest has remained low good invite anyone else would like unload write Ill look common threads publish consensus column Now John Wyss answer F3B Technology Gap John finalist last two team selection Finals doing hard way developing building own F3B Continued page 151 May1987 47 SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS CRACKING ATTACK AND STYROFOAM CHIPPING CORES LL YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 Layhigh Hamilton OH 45013 513 738-1576 Qantas Airways once again welcomes F3D RC Pylon World Championship Melbourne Australia April 16201987 separate compartment space will also need supply air exit Use heat sink radiate high metal temperature proximity wood Three-view sources Bill Hannan prolific writer magazine columns articles books latest work book Peanuts Pisrachios primarily intended builders small rubberpowered Scale models However book may special interest Scale modelers cause contains five three-view drawings can used build size airplane model Anyone owns plans acquire two-cylinder four-stroke engines cur rently attractive may have searching three-view drawings aircraft having such power plant Bills book two such prototypes depicted 1924 low-wing Bristol Brownie 1935 mid-wing Farman F450 long-nose Moustique Both have exposed two cylinders make ideal subjects power OS Saito twin Aside British Hawker Cygnet US Welch Aeronca series too two-cylinderpowered aircraft suitable using four-strokes provide reasonably scalelike appearance Both Bristol Farman relatively simple air craft other drawings Bills book include 1926 Farman Sport La Carte Postale Post Card parasol monoplane named because its wing shape has aspect ratio about 21 Another its distinctive features novel six-cylinder radial engine actually pair threecylinder radials placed back-to-back similar Curtiss Challenger Also included drawings 1932 Gee Bee R-l racer Flying Barrel 1935 Corben Super Ace latter betterlooking early home-builts featured serialized construction article Popular Avi ation magazine era powered four-cylinder Ford Model engine Write W C Hannan Graphics PO Box Escondido CA 92025 1938 Steve Wittman built flew early Bonzo racer Thompson Trophy race primitive-appearing airplane labeled Back yard Racer press days Steve used immense 12-cylinder V-type Curtiss D-12 engine nominal 400 horsepower originally made Curtiss P-I pursuit racer now part EAA Museum Oshkosh recently restored restoration crew enterprising Scale mod eler Bob Sonnleitner proceeded make sketches record dimensional data work carried out Steve Wittman lives Oshkosh airport border restoration nearly authentic possible Bob converted data completely accu rate pair drawings one-inch-to-one-foot scale two sheets 24 x 36 five exterior views intemal structure Price set $13 postpaid US rolled draw ings mailing tube modeler wants bit nostalgia history days unlimited glory air racing Bob Dolly Wiseher S-22 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 design called Virga Fortunately us John top F3B competitors quite willing share hard-earned information trouble dont have time write down what know indeed indebted John giving us following article mechanical aspects launching has promised additional articles airplane design F3B flying F3B competition flier required supply own launch system obvious competitor needs best launch system can afford legal according rules point will describe several systems used 1986 F3B Finals hope will give aspiring F3B fliers starting point selection launch system Motors important part launch system motor main rule requirements motors have physical size Check rule book two motors currently being used country popular F3B fliers first modified Ford long-shaft motor stock Ford starter motor used 98% countrys winches AMA events competitive F3B modifying relatively inexpensive motor some competitors have come up competitive system common mods clude adding extra field coils using better brushes balancing adding needle bearings output side shaft standard mods can performed good starter-rebuilding shop around $70 additional mods motor common knowledge Modified Ford motors used some members team Synergy Another motor used F3B competitors motor designed built DGM racing car starters motor designed specifically past USA F3B teams has used sev May1987 151 Continued page 154 ZMA Name Street Address City StateZip Problems lems Splitting thin ribs pinning Keeping ribs square vertical straight Strong glue joints Stop Dont ruin new / airplane wg tailWhat Need Are NEW Joint Points come 5 slot sizes 1/16 3/32 1/8 3/16 1/4 Makes perfect strong joint Needs no pins Distributes point loading compression tension torque Ask Favorite Hobby Deaier forJOiflt Points Package sea $119 Su-Pr-Line product AI-Tec Products inc Sidney Ohio 5 Remember 40 Wing 15 25 Engines Dealers 8 Distributors Welcomed Phone 703 2739593 FLYLINE MODELS INC PO Be, 2136 Fairta, V,ginls 22031 USA RC Soaring/Blakeslee Continued page 151 eral different countries past two World Championships currently used 50% F3B competitors similar Ford longshaft uses same mounting plate shaft Ford otherwise completely dif ferent similarity Ford allows motor replace Ford major modifications winch frames drums first built motor advertised guaranteed break wings used carefully Apparently did break few opinion motor powerful Fords standard modi fications motor costs around $200 DGM located Torrance California Phone 213 320-3170 current prices third motor used F3B Finals Bosch starter used Mercedes diesels motor popular Europe does have long shaft needs extensive modification get power drum Ron Vann used F3B Finals drum gear-driven prob ably heaviest winch Finals appeared very powerful Winch Line Monofilament now stan dard F3B Monofilament superior braided nylon two main reasons first stretch quality line Most monofilament very stretchy allows winch energy trans ferred Sailplane smooth way tranfer energy especially evident zoom phase launch monofilament necessary have abrupt pitch changes Sail plane during zoom quality appears less stressful Sailplane Rich Spicer used stretch monofilament very effectively putting tension line Sailplane would climb tow several seconds pulsing winch wind speed 10-15 mph stretch line combination strong wind allowed Rich kite heavy Synergy maximum height before zoom launch pulse/kite pulse/kite zoom Very effective second desirable quality monofilament its good aerodynamic drag quality quality easily seen during launch drag braided nylon creates curve sowline Sail plane turnaround pulley curve evident windy days Because draginduced curve Sailplane approaches point directly over turnaround line actually pulling backward down forward down simple vector analysis Line drag takes energy away Sail plane Some work has done using Kevlar line air-line attached braided nylon groundline reduce drag Success Kevlar has limited because has no stretch difficult tie monofilaments sine Some too stiff hold knots some have low dur ability have used Japanese-produced line called Jinkai excellent results well over 200 F3B launches no line-breaks using 200-lb-test 160-lb-test Some competitors using 125-lb-test line because its better stretch quality breaking line regu larly Jinkai available mail Janus Inc 10903 Inglewood Avenue Inglewood Ca 90304 Write current prices Phone 213 678-4821 Turnarounds Bicycle-wheel-hub turnarounds will work monofilaments hub must have diameter greater inch prevent burning line Aircraft control cable pulleys ball bearings seem key ingredient turnaround will damage monofilament have no trouble turnarounds based stainless steel ball-bearing pulley about 1 in diameter Other factors Drum diameters varied 2/2 inches over four inches consensus very important adjust diameter drum match motor Sailplane ex pected wind conditions Very few drums belt-driven directly driven off motor shafts Most winches pulsed foot hand switch group led Roger Roth Larry Jolly used very interesting system two-speed winch winch used two separate switches first part launch switch de pressed reduced current motor use stainless steel resistor produced low constant speed no pulsing As Sail plane approached zoom altitude second switch depressed supplied full current motor maximize zoom twospeed system very effective conclusion 1986 F3B Finals contestants launched competitively using va riety systems factor stood Out mind fact Sailplane greatest wingspan Synergy consistently launched highest name Michael Selig now very familiar Sailplaners interested high-performance air foils Over past few years Michael has modi fied some existing airfoils Epplers Bames also developed some own Michael now doing graduate work Princeton University has use large low-speed lowturbulence wind tunnel really important news because up now wind-tunnel work RC Sailplane airfoils done Ger Eppler Althaus course US Government agencies like NASA aircraft builders like Boeing have never much inter ested low Reynolds number Rn experimenta tion dont build planes 10-in chord flying 20 mph January Michael sent out letters asking modelers construct wind tunnel models wing sections having spans 335/, 12-in chord models needed both 1 built-up sheeted covered Monokote 2 foam-cored sheeted covered fiberglass Michael wants test 30 airfoils says goal ambitious possible will limited number wind tunnel models receive Unlike previous tests others focus experiments will testing known airfoils also developing experiment new better class airfoils RC Sailplanes support can settle issues ultimately accelerate quality sport Michael also said builders models will acknowledged final report published Soartech Michaels comments about some airfoils testing interesting Im going reprint full Clark-Y No matter look air foil seems crop up airfoil tested Althaus showed very low draglower predicted Eppler would like know right would Stan Watson has already started construction Clark-Y wind tunnel model E193 main reason testing compare results Althaus tests E205 205 basically decambered 193 should perform similarly lower lift 154 Model Aviation Classic R/C Scale TH sGREAT LAKES RADIO CONTROL SHORTKITS FOR THE SPORTFLYER INTROOU PRICE $4995 A-26 INVADER TNIN designed HAL PARENTI WING SPAN 68ENGINE SIZE 2510 45WEIGHT 7A 108 LBS THIS HIGH PERFORMANCETWIN ENGINEFLYING MACHINE IS EASYTO BUILD AND FUNTO FLY LIKE ALL OF OUR SHORT KITS IT IS DESIGNED AROUND PRECISION CUT FOAM WING CORE FOR STRENGTH AND TRUENESS THERE IS PLENTY OF WING AND TAIL AREA FOR POSITIVE HIGH AND LOW SPEED CONTROL WE USE STRAIGHT FORWARD QUICK AND STURDY LIGHT WEIGHT CONSTRUCTION THAT MAKES SENSE SHORT KITS INCLUDE PRECISION CUT FOAM WING CORES ABS HIGH IMPACT FORMED COWLINGS CLEAR FORMED CANOPIES WITH FRAMEWORK DETAIL MORE CLEAR - PARTS ON TWIN FORMED STEEL ENGINE MOUNTS EASY TO FOLLOW PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES PRE CUT PLTWOOD FIREWALLS CONTROL SURFACE HINGES LANDING GEAR BLOCKS STRAPS AND SCREWS NOT APPLICABLE ON TWINS BILL OF MATERIALS NO BALSA INCLUDED MOLDED TOP NACELLE PAIRINGS FOR TWIN ONLY FtOrie 815/459-0417 FREE CATALOG WITH ANY ORDER ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS 450 PER KIT CANADIANS ADD 650 TO WING MFG PO BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESIDENTS ADD 64% SALES TAX ALL ORDERS MUST REIN US FUNDS SEND 355 FOR PRODUCT CATALOG DESCRIBING DUR COMPLETE LINE OF FOAM WING ODRES ACCESSORIES KITS TOOLS AND MUCH MORE I1/NG MEG WORLD WAR II FIGHTER SERIES JAPANESE ABM2 ZERO29 TO 45 ENGINE SPAN 544 CHANNEL4 LBS AMERICAN P40 TOMAHAWK 29 TO 45 ENGINE SFAN 554-CHANNEL4 LBS GERMAN FW-1902910 45 ENGINE AFAN S44-CHANNEL4 LOS ITALIAN C205 FOLGORE29 ro 45 ENGINE SPAN 564-CHANNEL4 LBS what expect will shown experiment wonder also 205 truly good its fame suggests sheer momentum keeps going E2 14 After seeing airfoil Wind song have curious about ever since Right away shape airfoil should tell something designed like rest Eppler pack 193 201 203 205 207 209 385 387 exception 211 needs stripped off mighty Windoongs back spected closely FX 60-100 Like Clark-Y airfoil came flying colors tested Althaus did better predicted Eppler something Special about FX 60-100 Clark-Y have entered world experimental error isnt airfoil popular since has such low drag experimen tally compared other popular airfoils HQ 15/90 25/90 airfoils im press people want know what Quabeck has published airfoils designed sophisticated way Apparently designed like old NACA series air foils except time Quabeck did wind tunnel would like shed some light very grey area MB2535 15 airfoil has always attention anything intense E205 vs MB253515 debate Eighties started terest airfoils Frankly thought side 15%-thick foils 100% crazy because really believed thicker better Eppler results proved Now however after comparing inadequate theoretical model experiments airfoil after airfoil Im quick believe Eppler results anymore time put two wind tunnel com pare bias have hunch MB does have some surprises store us S2027 airfoil redesigned MB2535 15 better theory suggests Can believe theory airfoil letters have received seems just good betterbut experiment can say sure S3002 have told reliable source airfoil wont get out its own way Id like get wind tunnel reevaluate reliability sourceno hard feelings S3021 airfoil designed improvement over E205 recent wind-tunnel tests Althaus airfoil flight tests 25-meter Algebra equipped airfoil seems have accomplished its goal certain Althaus needs test 205 comparison event plan test both Princeton convince selves S4061 thoroughbred could Paul Carlson fly flat-plated Prodigy Nats win After building flying Prodigy own think its super airfoil/plane great LID must come airfoil doesnt show up wind-tunnel tests trouble S4062 new lower-drag higher-Rn version 4061 large cross-country Sailplanes According Eppler program possible design airfoil lower drag higher L/D new true real world however Only wind-tunnel ex periments can push find limits 4062 start will first candidate new line non-conservative airfoils Stan Watson has started construction too 1986 InterBatioBal Postal ChalleBge held last September scheme clubs around world fly th same tasks same day own fields count top five scores club see won No prizes awards given idea great because gives club opportunity compete friends overseas Thats wonderful thing about hobby/sport can travel almost country world find some folks enthusiastic about flying Sailplanes Reinhard Werner West Germany coor dinator 86 event member winning Versmold Club club spe cializes flying wings Lets let Reinhard de scribe effort Five clubs competed once again third time row flying wing nuts Germany managed place top did Continued page 159 ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 10 11 & 12 1987 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Veager co-director ticket address shown below ADVANCED TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon US Stamps orders above 5 tickets must contain extra postage Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Deadline ticket orders March 31 1987 Ticket sales final non orders program will returned near mid-March Tickets also available door COMPETITION CLASS NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models COMPETITION BOAT MILITARY SCALE BOAT HELICOPTER PLEASURE POWER BOAT R/C CAR WORKING VESSEL-UNARMED May1987 155 QUALITY PRODUCTS SINCE 1964 NEW SPECIFICATIONS Wing Span 59 Weight -48 LBS Engine 452 Cycle Radio 4-5 Channel CONSTRUCTION Balsa Wood pre-painted finished cover Fully assembled except installing Wings Tail Section Landing Gear Engine Radio F Tn-Cycle Gear Introductory Price 1 4800 Reg 22800 prices include Engine Mount installed Tank Control-Rods Canopy Servo-Tray Landing-Gear Tire Two Floats Linkage Accessories DEVELOPMENT COFree Delivery Models -- P FULLERTON CA 92633 X 2406 879-3266UOrder Prepaid Check 690-2019 win Because flew tnose terrible wings Well yes think its less psychological phenomenon Because some fellows actually believing old fairy tale self-imposed handicap appearing flying field extra-grim determination Determined know give wings true F-O-B treatmentfly burst competition fact first some spectacular burstsonly zero score crossing safety line Besides having fine weather really good winch some 25 kw 16 enthusiastic com petitors will course also help compile ac ceptable team score time two models genuine experimental status took part proceedings Both Dieter Perlick Dietmar Koker came up weirdlooking designssome hilarious booms sticking out aft wings some peculiar tail feathers fastened so-called tailplanes believe Being no dogmatists course allowed take partand dear fellows placed first second Gave us some thing think about bet Other clubs competing Brisbane MSC Australia MBC Vogelweide ModelingAustria Pelican SAUSA Wellington MAC New Zealand Top fliers Pelican Team John Gunsaullus Doble Dr Walt Good Samun Rick Bonnell Windsong Ed Berton original Carl Schrader Sagitta 2m 1987 IPC just concluded having flown last weekend March year three rounds Duration Distance again Ill pass along results available Also Ill try give info entering 1988 IPC Dodgson Designs New 1987 two-hour video tape now available has great flight sequen ces plus Bob D giving design philosohies four planes stable 134-in-span Windsong 60-in/72-in Pivot Plus Two-Meter Pixie 100-in Camano flying shots include slope flatland contest footage Especially impressive Dave Banks hand-launching climbing out Windsong fliers think market Dodgson kit will find quite few items interest after watching the tape think going find hard resist reach ing checkbook Bob hoping wontresist Actually Bob deserves lot credit mak ing sophisticated multi-channel kits available American Sailplaners Sailplane kit manu facturers have come gone 14 years Dodgson Designs has existence Bob has stuck ideas successful Specifically has always maintained Sailplanes ailerons flaps offer greatest versatility serious contest-minded flier might say Bob has ahead time because more contest fliers going concepts Also buy Dodgson kit youre getting extensive background design development testing plane will perform advertised built set up specified tape available VHS Beta 8mm Its perfect club meetings weddings bar mitz vahs whatever Send $10 shipping handling plus $15 deposit $25 total Dodgson Designs 21230 Damson Road Bothell WA 98021 Attention Scale enthusiasts Bob Banka Scale Model Research has Foto-Paaks 32 Sailplanes 14 powered Sailplanes available Foto Paaks contain eight 30 full-color 3/a-in 5-in photos taken modeler mind show details like instruments spoilers flaps paint schemes markings Prices range Float Model Introductory PriceTail Dragger Introductory Price 2O8OO Reg 298 001 48OO Reg 22800 MILLING MACMINIS INI 11I0 surun For Adetion Modeie BLUE4iDGE MACHINERY AN~LS INC POBoet3t-WV25026 N, CoM,gSI384503538I J [DCO SKY D[VI[ 65 Ignition Approxcd 90 Day Warraisty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORD[R DIRCT T&D RESEARCH AssoclArEs 6371 El Cajon Blvd Suite 115 San Diego CA 92115 51 FOR BROCHURE May1987 159 CUTTING TOOLS BALSA STRIPPER Precision stripwood easy Master Airscrew BALSA STRIPPER Strips up 1/2 wide 1/4 thick can cut quickly accurately trom sheet stock ver nier wheel advances %2 per turn adjustment precise stripper comes standard type 11 hobby blade unconditionally guaranteed against failure five years S495 suggested retail Mco-*StabIe available dealer WINDSOR PROPELLER CO $7 $19 Some ships slso have Koku-Fan three-view drawings svailable Xerox copies three-views magazines other sources Bobs complete list over 400 Foto-Psaks available $2 plus long SASE address 2334 Ticonderoga Costa Mesa CA 92626 special arrangement Bob send long SASE address end column Ill send Xerox page contains Sailplanes Motor-Gliders Second International First US F3H Cross-Country Contest will sponsored Thousand Oaks Soaring Society TOSS July 9 through 12 event has both FAI AMA sanctions F3H rules will strictly followed site Taft CA weather advertised being hot very good lift annual contest TOSSbut first time American club has obtained FAI sanction full de scription F3H International events see Larry Jollys May 86 Model Aviation report First International Cross-Country contest held South Africa December 1985 Larry won contest nosed out Joe Wurts 1986 TOSS X-Country complete contest info write Chuck Griswold 1646 LaJolla Drive Thousand Oaks CA 91360 F3H Fanatics can warm up Second InterW1.i *sts 132 ea / RAZOR PLANE new Master Airserew RAZOR PLANE uses heavyduty industrial blade held place two locating screws allowing cutting depth set very rigidly accurately plane has variety uses ding smoothing contours fuselages cowlings shap ing edges thinning strips making custom-sized strip stock frame blade retainer made tough Lesan plastic should prove almost indestruc tible normal use$495 suggested retail 384 Tesconl Ct Santa Rosa CA 95401 national entering Santa Maria Soaring So cietys Seventh Annual X-Country June 6 7 single-launch event over 25-mile triangu lar course California Valley will big barbeque raffle Saturday night Contact Larry Turner 323 Noguera Place Arroyo Grande CA 93420 Third Annual Western US RC Soaring Championships will moved Merwin Ranch Modesto year Dates June 13 14 event growing countrys biggest decided Modesto way lodging dining did Courtland Also Modesto RC Club assuming responsibility whole shebang Get details Dave Darling 2705 Harvest Road Modesto CA 95355-3430 Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 49 promotional material Goldberg al ready catalogs printed about 2000 bound After about hundred phone calls between Hazel Dan Ueberman Goldberg conferring lawyers moans groans considerable con versation figured best thing could would sit back have good laugh must say have con troversy about name new product am glad Carl Goldberg Models Right off offered change name pull advertising Although both us well introductory programs felt would easier less expensive us change name product instead Now needed new name could continue introductory program Back fort hustled change catalogs resurrect already-sent magazine advertising tried conduct business normal Hazel Maxey boys job renaming new covering material finally came upon idea tying new covering material Supercoat Dope natural already decided match colors covering dope anyway So its back mundane ordinary life Sig have experimenting new cyanoacrylate glue lately need real good catchy name Maxey wandered other day suggested Ultra-Jet Hmm what think think people Sig Goldberg perfect examples fact treat everyone right maintain sense humor can make living hobby Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Old-Timers/Mathews Continued page 51 lives have absolutely no business out flying model airplanes three four days highheat/humidity weather tragic death such occurred last years SAM Champs points out too clearly such activities ill-advised types played tennis year round jogged some such regularly perhaps lesser hazard would present nature model-building activities us get littleif anyreally strenuous exercise such us go running around countryside heat summer chasing model airplanes truly fool hardy seems sort contest aimed old folks like us should placed south Continued page 162 NORTHEAST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 e 207-490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 See local dealer call us referral 160 Model Aviation Leader Small Airfoil Technology MASTER AIRSCREW BEL-AIR 60

Radio Control Soaring Byron Blakeslee UPDATE During IMS Show Pasadena January US F3B team members met AMAs Executive Council industry rep resentatives Reports meetings very upbeat positive Depending upon funds raised good chance team will have eight membersthree previously announced very important because AMA contest success rests 80% pilot 20% plane World Champs its like pilot plane support crew flight two winches have put out working time flight time must tracked re-launches must considered doneplus other planes flight group have monitored see doing pilot has concentrate flight cant distracted trying manage too takes lot organizationand good well-trained people guys will great job can support team purchasing team pin $5 patch $10 best both $15 contributors will eligible big sweep stakes drawing will give away lots really good prizes merchandise list yet com pleted well print soon available Please send check F3B Soaring Team PO Box 9328 Albuquerque NM 87119 As buildup F3B World Championships column will devote quite bit space F3B think F3B boosters will find some things interest first item letter Trey Wood Daph ne AL has some thought-provoking com ments about getting F3B competition par tial answer Treys prayer provided John Wyss piece launching John lives Boulder CO familiar term F3B world-class intemational competition Sailplanes consists tasks Thermal Duration Speed Distance See pages 102-105 1986-87 AMA Official Model Aircraft Regula tions complete rules designation F3B assigned Federation Aeronautique temationale FAI Treys letter people write columns maga zines always saying want modeler input will have some idea what put articles decided write unload After being fairly successful locally AMA contests decided F3B next step 79 Nats Lincoln saw very first Sagitta given Skip Miller told Lee Renaud might sell prototype kit called did did believe 1980 went Texas compete elimination rounds F3B didnt go Finals because dis tance didnt think really good enough Two years later went Finals Jotiet IL During first round drop out radio problems What Im getting AMA contests F3B elimination rounds everyone willing help anyone needs wants help things have always enjoyed about flying Sailplanes guy first place contest will help guy second third best can Ive seen many times F3B Finals its cutthroat man himself Since no F3B activity area AMA Sailplaners quit rely wife brother help guy Finals helped wasnt flying repaired crack fuselage tried convince stay competitionusing backup plane Everyone else seemed too wrapped up own psycho logical warfare true champion though Dwight Hol ley went spectator 1981 World Champs Sacramento CA standing near tent watching Dwight work Gobbler wanting distract him too much asked short simple question about hinged ailerons surprise put down model opened toolbox gave hinges gave name address someone made jig make hinges winners 86 international Postal Challenge contest L FSV Versmoid West Germanywith theirtlying wings Reinhard Werner saysthatthetwoweird-looking experimental models centerwere allowed toflythisycardespite some uglyserodynamic appendages rear FSV Versmolds flying wings being launched R 86 Postal Challenge Details column 46 Model Aviation Tflree sample photos trom Scale Model Researchs 25-picture packageof 6E Photo-Peaks specifically selected assist Scale model builders column get deal price list special homemade tool required make brass hinges midst World Championship Dwight found time help someone else real champ realize competition fierce F3B contestants cant expected help everyone else what about guy might best pilot represent USbut doesnt get try team because doesnt have necessary backup personnel F3B pilots take own helpers Finals go World Champs too Another problem technical info still dont know what arrow-shaft hinge 1 read magazines pick up tip hint can Im still missing lot informtion source deals new construction methods ideas seems lot talk about lack interest F3B US believe people think F3B just too much trouble takes lot people equipment just practicemuch less run contest dont know what real problem dont take poll ask comments what modelers dont like about F3B would interested know what other fliers cite reasons participating F3B First glad hear Treys comments about Dwight Holley Dwight winner Sacramento World Championships Trey men tioned may have missed small announcement February Model Aviation Dwight passed away business would closed Bob Kopski lot say RC Electrics column March issue Over past few years Dwight gotten interested Electric airplanes built up quite retail business field Dwight longtime Sailpianer very successful East Coast competitor As Pete Carr said Dwights skill consistent people would say either spent 10 minutes looking lift 10 min utes working lift Either way Sail plane would lead rest us first flight final standings will missed Second Treys comment people US think F3B just too much trouble has undoubtedly hit nail head F3B com petition lot workand costly boot top technology gap Trey alluded takes lot time trouble find out whats hottest planes radios winches etc means either invest thousands hours lots money developing com petitive plane Rich Spicer group did Synergy program buy known com petitive plane Peter Muller Germany $500 per copy Steve Work Fi nalists Minnesota went latter route simply because relatively less trouble either case person must very gung ho about F3Band have pretty deep pockets previous paragraph notwithstanding F3B highest form hobby/sport very demanding very competitive therefore definition arena ardent skill ful players can compete liken F3B flying Indianapolis Formula 1 auto racingI like watch dont expect drive Treys idea poll find out modelers F3B interest has remained low good invite anyone else would like unload write Ill look common threads publish consensus column Now John Wyss answer F3B Technology Gap John finalist last two team selection Finals doing hard way developing building own F3B Continued page 151 May1987 47 SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS CRACKING ATTACK AND STYROFOAM CHIPPING CORES LL YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 Layhigh Hamilton OH 45013 513 738-1576 Qantas Airways once again welcomes F3D RC Pylon World Championship Melbourne Australia April 16201987 separate compartment space will also need supply air exit Use heat sink radiate high metal temperature proximity wood Three-view sources Bill Hannan prolific writer magazine columns articles books latest work book Peanuts Pisrachios primarily intended builders small rubberpowered Scale models However book may special interest Scale modelers cause contains five three-view drawings can used build size airplane model Anyone owns plans acquire two-cylinder four-stroke engines cur rently attractive may have searching three-view drawings aircraft having such power plant Bills book two such prototypes depicted 1924 low-wing Bristol Brownie 1935 mid-wing Farman F450 long-nose Moustique Both have exposed two cylinders make ideal subjects power OS Saito twin Aside British Hawker Cygnet US Welch Aeronca series too two-cylinderpowered aircraft suitable using four-strokes provide reasonably scalelike appearance Both Bristol Farman relatively simple air craft other drawings Bills book include 1926 Farman Sport La Carte Postale Post Card parasol monoplane named because its wing shape has aspect ratio about 21 Another its distinctive features novel six-cylinder radial engine actually pair threecylinder radials placed back-to-back similar Curtiss Challenger Also included drawings 1932 Gee Bee R-l racer Flying Barrel 1935 Corben Super Ace latter betterlooking early home-builts featured serialized construction article Popular Avi ation magazine era powered four-cylinder Ford Model engine Write W C Hannan Graphics PO Box Escondido CA 92025 1938 Steve Wittman built flew early Bonzo racer Thompson Trophy race primitive-appearing airplane labeled Back yard Racer press days Steve used immense 12-cylinder V-type Curtiss D-12 engine nominal 400 horsepower originally made Curtiss P-I pursuit racer now part EAA Museum Oshkosh recently restored restoration crew enterprising Scale mod eler Bob Sonnleitner proceeded make sketches record dimensional data work carried out Steve Wittman lives Oshkosh airport border restoration nearly authentic possible Bob converted data completely accu rate pair drawings one-inch-to-one-foot scale two sheets 24 x 36 five exterior views intemal structure Price set $13 postpaid US rolled draw ings mailing tube modeler wants bit nostalgia history days unlimited glory air racing Bob Dolly Wiseher S-22 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 design called Virga Fortunately us John top F3B competitors quite willing share hard-earned information trouble dont have time write down what know indeed indebted John giving us following article mechanical aspects launching has promised additional articles airplane design F3B flying F3B competition flier required supply own launch system obvious competitor needs best launch system can afford legal according rules point will describe several systems used 1986 F3B Finals hope will give aspiring F3B fliers starting point selection launch system Motors important part launch system motor main rule requirements motors have physical size Check rule book two motors currently being used country popular F3B fliers first modified Ford long-shaft motor stock Ford starter motor used 98% countrys winches AMA events competitive F3B modifying relatively inexpensive motor some competitors have come up competitive system common mods clude adding extra field coils using better brushes balancing adding needle bearings output side shaft standard mods can performed good starter-rebuilding shop around $70 additional mods motor common knowledge Modified Ford motors used some members team Synergy Another motor used F3B competitors motor designed built DGM racing car starters motor designed specifically past USA F3B teams has used sev May1987 151 Continued page 154 ZMA Name Street Address City StateZip Problems lems Splitting thin ribs pinning Keeping ribs square vertical straight Strong glue joints Stop Dont ruin new / airplane wg tailWhat Need Are NEW Joint Points come 5 slot sizes 1/16 3/32 1/8 3/16 1/4 Makes perfect strong joint Needs no pins Distributes point loading compression tension torque Ask Favorite Hobby Deaier forJOiflt Points Package sea $119 Su-Pr-Line product AI-Tec Products inc Sidney Ohio 5 Remember 40 Wing 15 25 Engines Dealers 8 Distributors Welcomed Phone 703 2739593 FLYLINE MODELS INC PO Be, 2136 Fairta, V,ginls 22031 USA RC Soaring/Blakeslee Continued page 151 eral different countries past two World Championships currently used 50% F3B competitors similar Ford longshaft uses same mounting plate shaft Ford otherwise completely dif ferent similarity Ford allows motor replace Ford major modifications winch frames drums first built motor advertised guaranteed break wings used carefully Apparently did break few opinion motor powerful Fords standard modi fications motor costs around $200 DGM located Torrance California Phone 213 320-3170 current prices third motor used F3B Finals Bosch starter used Mercedes diesels motor popular Europe does have long shaft needs extensive modification get power drum Ron Vann used F3B Finals drum gear-driven prob ably heaviest winch Finals appeared very powerful Winch Line Monofilament now stan dard F3B Monofilament superior braided nylon two main reasons first stretch quality line Most monofilament very stretchy allows winch energy trans ferred Sailplane smooth way tranfer energy especially evident zoom phase launch monofilament necessary have abrupt pitch changes Sail plane during zoom quality appears less stressful Sailplane Rich Spicer used stretch monofilament very effectively putting tension line Sailplane would climb tow several seconds pulsing winch wind speed 10-15 mph stretch line combination strong wind allowed Rich kite heavy Synergy maximum height before zoom launch pulse/kite pulse/kite zoom Very effective second desirable quality monofilament its good aerodynamic drag quality quality easily seen during launch drag braided nylon creates curve sowline Sail plane turnaround pulley curve evident windy days Because draginduced curve Sailplane approaches point directly over turnaround line actually pulling backward down forward down simple vector analysis Line drag takes energy away Sail plane Some work has done using Kevlar line air-line attached braided nylon groundline reduce drag Success Kevlar has limited because has no stretch difficult tie monofilaments sine Some too stiff hold knots some have low dur ability have used Japanese-produced line called Jinkai excellent results well over 200 F3B launches no line-breaks using 200-lb-test 160-lb-test Some competitors using 125-lb-test line because its better stretch quality breaking line regu larly Jinkai available mail Janus Inc 10903 Inglewood Avenue Inglewood Ca 90304 Write current prices Phone 213 678-4821 Turnarounds Bicycle-wheel-hub turnarounds will work monofilaments hub must have diameter greater inch prevent burning line Aircraft control cable pulleys ball bearings seem key ingredient turnaround will damage monofilament have no trouble turnarounds based stainless steel ball-bearing pulley about 1 in diameter Other factors Drum diameters varied 2/2 inches over four inches consensus very important adjust diameter drum match motor Sailplane ex pected wind conditions Very few drums belt-driven directly driven off motor shafts Most winches pulsed foot hand switch group led Roger Roth Larry Jolly used very interesting system two-speed winch winch used two separate switches first part launch switch de pressed reduced current motor use stainless steel resistor produced low constant speed no pulsing As Sail plane approached zoom altitude second switch depressed supplied full current motor maximize zoom twospeed system very effective conclusion 1986 F3B Finals contestants launched competitively using va riety systems factor stood Out mind fact Sailplane greatest wingspan Synergy consistently launched highest name Michael Selig now very familiar Sailplaners interested high-performance air foils Over past few years Michael has modi fied some existing airfoils Epplers Bames also developed some own Michael now doing graduate work Princeton University has use large low-speed lowturbulence wind tunnel really important news because up now wind-tunnel work RC Sailplane airfoils done Ger Eppler Althaus course US Government agencies like NASA aircraft builders like Boeing have never much inter ested low Reynolds number Rn experimenta tion dont build planes 10-in chord flying 20 mph January Michael sent out letters asking modelers construct wind tunnel models wing sections having spans 335/, 12-in chord models needed both 1 built-up sheeted covered Monokote 2 foam-cored sheeted covered fiberglass Michael wants test 30 airfoils says goal ambitious possible will limited number wind tunnel models receive Unlike previous tests others focus experiments will testing known airfoils also developing experiment new better class airfoils RC Sailplanes support can settle issues ultimately accelerate quality sport Michael also said builders models will acknowledged final report published Soartech Michaels comments about some airfoils testing interesting Im going reprint full Clark-Y No matter look air foil seems crop up airfoil tested Althaus showed very low draglower predicted Eppler would like know right would Stan Watson has already started construction Clark-Y wind tunnel model E193 main reason testing compare results Althaus tests E205 205 basically decambered 193 should perform similarly lower lift 154 Model Aviation Classic R/C Scale TH sGREAT LAKES RADIO CONTROL SHORTKITS FOR THE SPORTFLYER INTROOU PRICE $4995 A-26 INVADER TNIN designed HAL PARENTI WING SPAN 68ENGINE SIZE 2510 45WEIGHT 7A 108 LBS THIS HIGH PERFORMANCETWIN ENGINEFLYING MACHINE IS EASYTO BUILD AND FUNTO FLY LIKE ALL OF OUR SHORT KITS IT IS DESIGNED AROUND PRECISION CUT FOAM WING CORE FOR STRENGTH AND TRUENESS THERE IS PLENTY OF WING AND TAIL AREA FOR POSITIVE HIGH AND LOW SPEED CONTROL WE USE STRAIGHT FORWARD QUICK AND STURDY LIGHT WEIGHT CONSTRUCTION THAT MAKES SENSE SHORT KITS INCLUDE PRECISION CUT FOAM WING CORES ABS HIGH IMPACT FORMED COWLINGS CLEAR FORMED CANOPIES WITH FRAMEWORK DETAIL MORE CLEAR - PARTS ON TWIN FORMED STEEL ENGINE MOUNTS EASY TO FOLLOW PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES PRE CUT PLTWOOD FIREWALLS CONTROL SURFACE HINGES LANDING GEAR BLOCKS STRAPS AND SCREWS NOT APPLICABLE ON TWINS BILL OF MATERIALS NO BALSA INCLUDED MOLDED TOP NACELLE PAIRINGS FOR TWIN ONLY FtOrie 815/459-0417 FREE CATALOG WITH ANY ORDER ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS 450 PER KIT CANADIANS ADD 650 TO WING MFG PO BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESIDENTS ADD 64% SALES TAX ALL ORDERS MUST REIN US FUNDS SEND 355 FOR PRODUCT CATALOG DESCRIBING DUR COMPLETE LINE OF FOAM WING ODRES ACCESSORIES KITS TOOLS AND MUCH MORE I1/NG MEG WORLD WAR II FIGHTER SERIES JAPANESE ABM2 ZERO29 TO 45 ENGINE SPAN 544 CHANNEL4 LBS AMERICAN P40 TOMAHAWK 29 TO 45 ENGINE SFAN 554-CHANNEL4 LBS GERMAN FW-1902910 45 ENGINE AFAN S44-CHANNEL4 LOS ITALIAN C205 FOLGORE29 ro 45 ENGINE SPAN 564-CHANNEL4 LBS what expect will shown experiment wonder also 205 truly good its fame suggests sheer momentum keeps going E2 14 After seeing airfoil Wind song have curious about ever since Right away shape airfoil should tell something designed like rest Eppler pack 193 201 203 205 207 209 385 387 exception 211 needs stripped off mighty Windoongs back spected closely FX 60-100 Like Clark-Y airfoil came flying colors tested Althaus did better predicted Eppler something Special about FX 60-100 Clark-Y have entered world experimental error isnt airfoil popular since has such low drag experimen tally compared other popular airfoils HQ 15/90 25/90 airfoils im press people want know what Quabeck has published airfoils designed sophisticated way Apparently designed like old NACA series air foils except time Quabeck did wind tunnel would like shed some light very grey area MB2535 15 airfoil has always attention anything intense E205 vs MB253515 debate Eighties started terest airfoils Frankly thought side 15%-thick foils 100% crazy because really believed thicker better Eppler results proved Now however after comparing inadequate theoretical model experiments airfoil after airfoil Im quick believe Eppler results anymore time put two wind tunnel com pare bias have hunch MB does have some surprises store us S2027 airfoil redesigned MB2535 15 better theory suggests Can believe theory airfoil letters have received seems just good betterbut experiment can say sure S3002 have told reliable source airfoil wont get out its own way Id like get wind tunnel reevaluate reliability sourceno hard feelings S3021 airfoil designed improvement over E205 recent wind-tunnel tests Althaus airfoil flight tests 25-meter Algebra equipped airfoil seems have accomplished its goal certain Althaus needs test 205 comparison event plan test both Princeton convince selves S4061 thoroughbred could Paul Carlson fly flat-plated Prodigy Nats win After building flying Prodigy own think its super airfoil/plane great LID must come airfoil doesnt show up wind-tunnel tests trouble S4062 new lower-drag higher-Rn version 4061 large cross-country Sailplanes According Eppler program possible design airfoil lower drag higher L/D new true real world however Only wind-tunnel ex periments can push find limits 4062 start will first candidate new line non-conservative airfoils Stan Watson has started construction too 1986 InterBatioBal Postal ChalleBge held last September scheme clubs around world fly th same tasks same day own fields count top five scores club see won No prizes awards given idea great because gives club opportunity compete friends overseas Thats wonderful thing about hobby/sport can travel almost country world find some folks enthusiastic about flying Sailplanes Reinhard Werner West Germany coor dinator 86 event member winning Versmold Club club spe cializes flying wings Lets let Reinhard de scribe effort Five clubs competed once again third time row flying wing nuts Germany managed place top did Continued page 159 ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 10 11 & 12 1987 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Veager co-director ticket address shown below ADVANCED TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon US Stamps orders above 5 tickets must contain extra postage Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Deadline ticket orders March 31 1987 Ticket sales final non orders program will returned near mid-March Tickets also available door COMPETITION CLASS NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models COMPETITION BOAT MILITARY SCALE BOAT HELICOPTER PLEASURE POWER BOAT R/C CAR WORKING VESSEL-UNARMED May1987 155 QUALITY PRODUCTS SINCE 1964 NEW SPECIFICATIONS Wing Span 59 Weight -48 LBS Engine 452 Cycle Radio 4-5 Channel CONSTRUCTION Balsa Wood pre-painted finished cover Fully assembled except installing Wings Tail Section Landing Gear Engine Radio F Tn-Cycle Gear Introductory Price 1 4800 Reg 22800 prices include Engine Mount installed Tank Control-Rods Canopy Servo-Tray Landing-Gear Tire Two Floats Linkage Accessories DEVELOPMENT COFree Delivery Models -- P FULLERTON CA 92633 X 2406 879-3266UOrder Prepaid Check 690-2019 win Because flew tnose terrible wings Well yes think its less psychological phenomenon Because some fellows actually believing old fairy tale self-imposed handicap appearing flying field extra-grim determination Determined know give wings true F-O-B treatmentfly burst competition fact first some spectacular burstsonly zero score crossing safety line Besides having fine weather really good winch some 25 kw 16 enthusiastic com petitors will course also help compile ac ceptable team score time two models genuine experimental status took part proceedings Both Dieter Perlick Dietmar Koker came up weirdlooking designssome hilarious booms sticking out aft wings some peculiar tail feathers fastened so-called tailplanes believe Being no dogmatists course allowed take partand dear fellows placed first second Gave us some thing think about bet Other clubs competing Brisbane MSC Australia MBC Vogelweide ModelingAustria Pelican SAUSA Wellington MAC New Zealand Top fliers Pelican Team John Gunsaullus Doble Dr Walt Good Samun Rick Bonnell Windsong Ed Berton original Carl Schrader Sagitta 2m 1987 IPC just concluded having flown last weekend March year three rounds Duration Distance again Ill pass along results available Also Ill try give info entering 1988 IPC Dodgson Designs New 1987 two-hour video tape now available has great flight sequen ces plus Bob D giving design philosohies four planes stable 134-in-span Windsong 60-in/72-in Pivot Plus Two-Meter Pixie 100-in Camano flying shots include slope flatland contest footage Especially impressive Dave Banks hand-launching climbing out Windsong fliers think market Dodgson kit will find quite few items interest after watching the tape think going find hard resist reach ing checkbook Bob hoping wontresist Actually Bob deserves lot credit mak ing sophisticated multi-channel kits available American Sailplaners Sailplane kit manu facturers have come gone 14 years Dodgson Designs has existence Bob has stuck ideas successful Specifically has always maintained Sailplanes ailerons flaps offer greatest versatility serious contest-minded flier might say Bob has ahead time because more contest fliers going concepts Also buy Dodgson kit youre getting extensive background design development testing plane will perform advertised built set up specified tape available VHS Beta 8mm Its perfect club meetings weddings bar mitz vahs whatever Send $10 shipping handling plus $15 deposit $25 total Dodgson Designs 21230 Damson Road Bothell WA 98021 Attention Scale enthusiasts Bob Banka Scale Model Research has Foto-Paaks 32 Sailplanes 14 powered Sailplanes available Foto Paaks contain eight 30 full-color 3/a-in 5-in photos taken modeler mind show details like instruments spoilers flaps paint schemes markings Prices range Float Model Introductory PriceTail Dragger Introductory Price 2O8OO Reg 298 001 48OO Reg 22800 MILLING MACMINIS INI 11I0 surun For Adetion Modeie BLUE4iDGE MACHINERY AN~LS INC POBoet3t-WV25026 N, CoM,gSI384503538I J [DCO SKY D[VI[ 65 Ignition Approxcd 90 Day Warraisty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORD[R DIRCT T&D RESEARCH AssoclArEs 6371 El Cajon Blvd Suite 115 San Diego CA 92115 51 FOR BROCHURE May1987 159 CUTTING TOOLS BALSA STRIPPER Precision stripwood easy Master Airscrew BALSA STRIPPER Strips up 1/2 wide 1/4 thick can cut quickly accurately trom sheet stock ver nier wheel advances %2 per turn adjustment precise stripper comes standard type 11 hobby blade unconditionally guaranteed against failure five years S495 suggested retail Mco-*StabIe available dealer WINDSOR PROPELLER CO $7 $19 Some ships slso have Koku-Fan three-view drawings svailable Xerox copies three-views magazines other sources Bobs complete list over 400 Foto-Psaks available $2 plus long SASE address 2334 Ticonderoga Costa Mesa CA 92626 special arrangement Bob send long SASE address end column Ill send Xerox page contains Sailplanes Motor-Gliders Second International First US F3H Cross-Country Contest will sponsored Thousand Oaks Soaring Society TOSS July 9 through 12 event has both FAI AMA sanctions F3H rules will strictly followed site Taft CA weather advertised being hot very good lift annual contest TOSSbut first time American club has obtained FAI sanction full de scription F3H International events see Larry Jollys May 86 Model Aviation report First International Cross-Country contest held South Africa December 1985 Larry won contest nosed out Joe Wurts 1986 TOSS X-Country complete contest info write Chuck Griswold 1646 LaJolla Drive Thousand Oaks CA 91360 F3H Fanatics can warm up Second InterW1.i *sts 132 ea / RAZOR PLANE new Master Airserew RAZOR PLANE uses heavyduty industrial blade held place two locating screws allowing cutting depth set very rigidly accurately plane has variety uses ding smoothing contours fuselages cowlings shap ing edges thinning strips making custom-sized strip stock frame blade retainer made tough Lesan plastic should prove almost indestruc tible normal use$495 suggested retail 384 Tesconl Ct Santa Rosa CA 95401 national entering Santa Maria Soaring So cietys Seventh Annual X-Country June 6 7 single-launch event over 25-mile triangu lar course California Valley will big barbeque raffle Saturday night Contact Larry Turner 323 Noguera Place Arroyo Grande CA 93420 Third Annual Western US RC Soaring Championships will moved Merwin Ranch Modesto year Dates June 13 14 event growing countrys biggest decided Modesto way lodging dining did Courtland Also Modesto RC Club assuming responsibility whole shebang Get details Dave Darling 2705 Harvest Road Modesto CA 95355-3430 Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 49 promotional material Goldberg al ready catalogs printed about 2000 bound After about hundred phone calls between Hazel Dan Ueberman Goldberg conferring lawyers moans groans considerable con versation figured best thing could would sit back have good laugh must say have con troversy about name new product am glad Carl Goldberg Models Right off offered change name pull advertising Although both us well introductory programs felt would easier less expensive us change name product instead Now needed new name could continue introductory program Back fort hustled change catalogs resurrect already-sent magazine advertising tried conduct business normal Hazel Maxey boys job renaming new covering material finally came upon idea tying new covering material Supercoat Dope natural already decided match colors covering dope anyway So its back mundane ordinary life Sig have experimenting new cyanoacrylate glue lately need real good catchy name Maxey wandered other day suggested Ultra-Jet Hmm what think think people Sig Goldberg perfect examples fact treat everyone right maintain sense humor can make living hobby Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Old-Timers/Mathews Continued page 51 lives have absolutely no business out flying model airplanes three four days highheat/humidity weather tragic death such occurred last years SAM Champs points out too clearly such activities ill-advised types played tennis year round jogged some such regularly perhaps lesser hazard would present nature model-building activities us get littleif anyreally strenuous exercise such us go running around countryside heat summer chasing model airplanes truly fool hardy seems sort contest aimed old folks like us should placed south Continued page 162 NORTHEAST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 e 207-490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 See local dealer call us referral 160 Model Aviation Leader Small Airfoil Technology MASTER AIRSCREW BEL-AIR 60

Radio Control Soaring Byron Blakeslee UPDATE During IMS Show Pasadena January US F3B team members met AMAs Executive Council industry rep resentatives Reports meetings very upbeat positive Depending upon funds raised good chance team will have eight membersthree previously announced very important because AMA contest success rests 80% pilot 20% plane World Champs its like pilot plane support crew flight two winches have put out working time flight time must tracked re-launches must considered doneplus other planes flight group have monitored see doing pilot has concentrate flight cant distracted trying manage too takes lot organizationand good well-trained people guys will great job can support team purchasing team pin $5 patch $10 best both $15 contributors will eligible big sweep stakes drawing will give away lots really good prizes merchandise list yet com pleted well print soon available Please send check F3B Soaring Team PO Box 9328 Albuquerque NM 87119 As buildup F3B World Championships column will devote quite bit space F3B think F3B boosters will find some things interest first item letter Trey Wood Daph ne AL has some thought-provoking com ments about getting F3B competition par tial answer Treys prayer provided John Wyss piece launching John lives Boulder CO familiar term F3B world-class intemational competition Sailplanes consists tasks Thermal Duration Speed Distance See pages 102-105 1986-87 AMA Official Model Aircraft Regula tions complete rules designation F3B assigned Federation Aeronautique temationale FAI Treys letter people write columns maga zines always saying want modeler input will have some idea what put articles decided write unload After being fairly successful locally AMA contests decided F3B next step 79 Nats Lincoln saw very first Sagitta given Skip Miller told Lee Renaud might sell prototype kit called did did believe 1980 went Texas compete elimination rounds F3B didnt go Finals because dis tance didnt think really good enough Two years later went Finals Jotiet IL During first round drop out radio problems What Im getting AMA contests F3B elimination rounds everyone willing help anyone needs wants help things have always enjoyed about flying Sailplanes guy first place contest will help guy second third best can Ive seen many times F3B Finals its cutthroat man himself Since no F3B activity area AMA Sailplaners quit rely wife brother help guy Finals helped wasnt flying repaired crack fuselage tried convince stay competitionusing backup plane Everyone else seemed too wrapped up own psycho logical warfare true champion though Dwight Hol ley went spectator 1981 World Champs Sacramento CA standing near tent watching Dwight work Gobbler wanting distract him too much asked short simple question about hinged ailerons surprise put down model opened toolbox gave hinges gave name address someone made jig make hinges winners 86 international Postal Challenge contest L FSV Versmoid West Germanywith theirtlying wings Reinhard Werner saysthatthetwoweird-looking experimental models centerwere allowed toflythisycardespite some uglyserodynamic appendages rear FSV Versmolds flying wings being launched R 86 Postal Challenge Details column 46 Model Aviation Tflree sample photos trom Scale Model Researchs 25-picture packageof 6E Photo-Peaks specifically selected assist Scale model builders column get deal price list special homemade tool required make brass hinges midst World Championship Dwight found time help someone else real champ realize competition fierce F3B contestants cant expected help everyone else what about guy might best pilot represent USbut doesnt get try team because doesnt have necessary backup personnel F3B pilots take own helpers Finals go World Champs too Another problem technical info still dont know what arrow-shaft hinge 1 read magazines pick up tip hint can Im still missing lot informtion source deals new construction methods ideas seems lot talk about lack interest F3B US believe people think F3B just too much trouble takes lot people equipment just practicemuch less run contest dont know what real problem dont take poll ask comments what modelers dont like about F3B would interested know what other fliers cite reasons participating F3B First glad hear Treys comments about Dwight Holley Dwight winner Sacramento World Championships Trey men tioned may have missed small announcement February Model Aviation Dwight passed away business would closed Bob Kopski lot say RC Electrics column March issue Over past few years Dwight gotten interested Electric airplanes built up quite retail business field Dwight longtime Sailpianer very successful East Coast competitor As Pete Carr said Dwights skill consistent people would say either spent 10 minutes looking lift 10 min utes working lift Either way Sail plane would lead rest us first flight final standings will missed Second Treys comment people US think F3B just too much trouble has undoubtedly hit nail head F3B com petition lot workand costly boot top technology gap Trey alluded takes lot time trouble find out whats hottest planes radios winches etc means either invest thousands hours lots money developing com petitive plane Rich Spicer group did Synergy program buy known com petitive plane Peter Muller Germany $500 per copy Steve Work Fi nalists Minnesota went latter route simply because relatively less trouble either case person must very gung ho about F3Band have pretty deep pockets previous paragraph notwithstanding F3B highest form hobby/sport very demanding very competitive therefore definition arena ardent skill ful players can compete liken F3B flying Indianapolis Formula 1 auto racingI like watch dont expect drive Treys idea poll find out modelers F3B interest has remained low good invite anyone else would like unload write Ill look common threads publish consensus column Now John Wyss answer F3B Technology Gap John finalist last two team selection Finals doing hard way developing building own F3B Continued page 151 May1987 47 SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS CRACKING ATTACK AND STYROFOAM CHIPPING CORES LL YOUR DEALER OR DISTRIBUTOR DAVE BROWN PRODUCTS 4560 Layhigh Hamilton OH 45013 513 738-1576 Qantas Airways once again welcomes F3D RC Pylon World Championship Melbourne Australia April 16201987 separate compartment space will also need supply air exit Use heat sink radiate high metal temperature proximity wood Three-view sources Bill Hannan prolific writer magazine columns articles books latest work book Peanuts Pisrachios primarily intended builders small rubberpowered Scale models However book may special interest Scale modelers cause contains five three-view drawings can used build size airplane model Anyone owns plans acquire two-cylinder four-stroke engines cur rently attractive may have searching three-view drawings aircraft having such power plant Bills book two such prototypes depicted 1924 low-wing Bristol Brownie 1935 mid-wing Farman F450 long-nose Moustique Both have exposed two cylinders make ideal subjects power OS Saito twin Aside British Hawker Cygnet US Welch Aeronca series too two-cylinderpowered aircraft suitable using four-strokes provide reasonably scalelike appearance Both Bristol Farman relatively simple air craft other drawings Bills book include 1926 Farman Sport La Carte Postale Post Card parasol monoplane named because its wing shape has aspect ratio about 21 Another its distinctive features novel six-cylinder radial engine actually pair threecylinder radials placed back-to-back similar Curtiss Challenger Also included drawings 1932 Gee Bee R-l racer Flying Barrel 1935 Corben Super Ace latter betterlooking early home-builts featured serialized construction article Popular Avi ation magazine era powered four-cylinder Ford Model engine Write W C Hannan Graphics PO Box Escondido CA 92025 1938 Steve Wittman built flew early Bonzo racer Thompson Trophy race primitive-appearing airplane labeled Back yard Racer press days Steve used immense 12-cylinder V-type Curtiss D-12 engine nominal 400 horsepower originally made Curtiss P-I pursuit racer now part EAA Museum Oshkosh recently restored restoration crew enterprising Scale mod eler Bob Sonnleitner proceeded make sketches record dimensional data work carried out Steve Wittman lives Oshkosh airport border restoration nearly authentic possible Bob converted data completely accu rate pair drawings one-inch-to-one-foot scale two sheets 24 x 36 five exterior views intemal structure Price set $13 postpaid US rolled draw ings mailing tube modeler wants bit nostalgia history days unlimited glory air racing Bob Dolly Wiseher S-22 Lapham Peak Rd Delafleld WI 53018 RC Soaring/Blakeslee Continued page 47 design called Virga Fortunately us John top F3B competitors quite willing share hard-earned information trouble dont have time write down what know indeed indebted John giving us following article mechanical aspects launching has promised additional articles airplane design F3B flying F3B competition flier required supply own launch system obvious competitor needs best launch system can afford legal according rules point will describe several systems used 1986 F3B Finals hope will give aspiring F3B fliers starting point selection launch system Motors important part launch system motor main rule requirements motors have physical size Check rule book two motors currently being used country popular F3B fliers first modified Ford long-shaft motor stock Ford starter motor used 98% countrys winches AMA events competitive F3B modifying relatively inexpensive motor some competitors have come up competitive system common mods clude adding extra field coils using better brushes balancing adding needle bearings output side shaft standard mods can performed good starter-rebuilding shop around $70 additional mods motor common knowledge Modified Ford motors used some members team Synergy Another motor used F3B competitors motor designed built DGM racing car starters motor designed specifically past USA F3B teams has used sev May1987 151 Continued page 154 ZMA Name Street Address City StateZip Problems lems Splitting thin ribs pinning Keeping ribs square vertical straight Strong glue joints Stop Dont ruin new / airplane wg tailWhat Need Are NEW Joint Points come 5 slot sizes 1/16 3/32 1/8 3/16 1/4 Makes perfect strong joint Needs no pins Distributes point loading compression tension torque Ask Favorite Hobby Deaier forJOiflt Points Package sea $119 Su-Pr-Line product AI-Tec Products inc Sidney Ohio 5 Remember 40 Wing 15 25 Engines Dealers 8 Distributors Welcomed Phone 703 2739593 FLYLINE MODELS INC PO Be, 2136 Fairta, V,ginls 22031 USA RC Soaring/Blakeslee Continued page 151 eral different countries past two World Championships currently used 50% F3B competitors similar Ford longshaft uses same mounting plate shaft Ford otherwise completely dif ferent similarity Ford allows motor replace Ford major modifications winch frames drums first built motor advertised guaranteed break wings used carefully Apparently did break few opinion motor powerful Fords standard modi fications motor costs around $200 DGM located Torrance California Phone 213 320-3170 current prices third motor used F3B Finals Bosch starter used Mercedes diesels motor popular Europe does have long shaft needs extensive modification get power drum Ron Vann used F3B Finals drum gear-driven prob ably heaviest winch Finals appeared very powerful Winch Line Monofilament now stan dard F3B Monofilament superior braided nylon two main reasons first stretch quality line Most monofilament very stretchy allows winch energy trans ferred Sailplane smooth way tranfer energy especially evident zoom phase launch monofilament necessary have abrupt pitch changes Sail plane during zoom quality appears less stressful Sailplane Rich Spicer used stretch monofilament very effectively putting tension line Sailplane would climb tow several seconds pulsing winch wind speed 10-15 mph stretch line combination strong wind allowed Rich kite heavy Synergy maximum height before zoom launch pulse/kite pulse/kite zoom Very effective second desirable quality monofilament its good aerodynamic drag quality quality easily seen during launch drag braided nylon creates curve sowline Sail plane turnaround pulley curve evident windy days Because draginduced curve Sailplane approaches point directly over turnaround line actually pulling backward down forward down simple vector analysis Line drag takes energy away Sail plane Some work has done using Kevlar line air-line attached braided nylon groundline reduce drag Success Kevlar has limited because has no stretch difficult tie monofilaments sine Some too stiff hold knots some have low dur ability have used Japanese-produced line called Jinkai excellent results well over 200 F3B launches no line-breaks using 200-lb-test 160-lb-test Some competitors using 125-lb-test line because its better stretch quality breaking line regu larly Jinkai available mail Janus Inc 10903 Inglewood Avenue Inglewood Ca 90304 Write current prices Phone 213 678-4821 Turnarounds Bicycle-wheel-hub turnarounds will work monofilaments hub must have diameter greater inch prevent burning line Aircraft control cable pulleys ball bearings seem key ingredient turnaround will damage monofilament have no trouble turnarounds based stainless steel ball-bearing pulley about 1 in diameter Other factors Drum diameters varied 2/2 inches over four inches consensus very important adjust diameter drum match motor Sailplane ex pected wind conditions Very few drums belt-driven directly driven off motor shafts Most winches pulsed foot hand switch group led Roger Roth Larry Jolly used very interesting system two-speed winch winch used two separate switches first part launch switch de pressed reduced current motor use stainless steel resistor produced low constant speed no pulsing As Sail plane approached zoom altitude second switch depressed supplied full current motor maximize zoom twospeed system very effective conclusion 1986 F3B Finals contestants launched competitively using va riety systems factor stood Out mind fact Sailplane greatest wingspan Synergy consistently launched highest name Michael Selig now very familiar Sailplaners interested high-performance air foils Over past few years Michael has modi fied some existing airfoils Epplers Bames also developed some own Michael now doing graduate work Princeton University has use large low-speed lowturbulence wind tunnel really important news because up now wind-tunnel work RC Sailplane airfoils done Ger Eppler Althaus course US Government agencies like NASA aircraft builders like Boeing have never much inter ested low Reynolds number Rn experimenta tion dont build planes 10-in chord flying 20 mph January Michael sent out letters asking modelers construct wind tunnel models wing sections having spans 335/, 12-in chord models needed both 1 built-up sheeted covered Monokote 2 foam-cored sheeted covered fiberglass Michael wants test 30 airfoils says goal ambitious possible will limited number wind tunnel models receive Unlike previous tests others focus experiments will testing known airfoils also developing experiment new better class airfoils RC Sailplanes support can settle issues ultimately accelerate quality sport Michael also said builders models will acknowledged final report published Soartech Michaels comments about some airfoils testing interesting Im going reprint full Clark-Y No matter look air foil seems crop up airfoil tested Althaus showed very low draglower predicted Eppler would like know right would Stan Watson has already started construction Clark-Y wind tunnel model E193 main reason testing compare results Althaus tests E205 205 basically decambered 193 should perform similarly lower lift 154 Model Aviation Classic R/C Scale TH sGREAT LAKES RADIO CONTROL SHORTKITS FOR THE SPORTFLYER INTROOU PRICE $4995 A-26 INVADER TNIN designed HAL PARENTI WING SPAN 68ENGINE SIZE 2510 45WEIGHT 7A 108 LBS THIS HIGH PERFORMANCETWIN ENGINEFLYING MACHINE IS EASYTO BUILD AND FUNTO FLY LIKE ALL OF OUR SHORT KITS IT IS DESIGNED AROUND PRECISION CUT FOAM WING CORE FOR STRENGTH AND TRUENESS THERE IS PLENTY OF WING AND TAIL AREA FOR POSITIVE HIGH AND LOW SPEED CONTROL WE USE STRAIGHT FORWARD QUICK AND STURDY LIGHT WEIGHT CONSTRUCTION THAT MAKES SENSE SHORT KITS INCLUDE PRECISION CUT FOAM WING CORES ABS HIGH IMPACT FORMED COWLINGS CLEAR FORMED CANOPIES WITH FRAMEWORK DETAIL MORE CLEAR - PARTS ON TWIN FORMED STEEL ENGINE MOUNTS EASY TO FOLLOW PLANS WITH CONSTRUCTION DETAILS AND ALL NECESSARY TEMPLATES PRE CUT PLTWOOD FIREWALLS CONTROL SURFACE HINGES LANDING GEAR BLOCKS STRAPS AND SCREWS NOT APPLICABLE ON TWINS BILL OF MATERIALS NO BALSA INCLUDED MOLDED TOP NACELLE PAIRINGS FOR TWIN ONLY FtOrie 815/459-0417 FREE CATALOG WITH ANY ORDER ORDERING SEND CHECK OR MONEY ORDER FOR REQUIRED AMOUNT PLUS 450 PER KIT CANADIANS ADD 650 TO WING MFG PO BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESIDENTS ADD 64% SALES TAX ALL ORDERS MUST REIN US FUNDS SEND 355 FOR PRODUCT CATALOG DESCRIBING DUR COMPLETE LINE OF FOAM WING ODRES ACCESSORIES KITS TOOLS AND MUCH MORE I1/NG MEG WORLD WAR II FIGHTER SERIES JAPANESE ABM2 ZERO29 TO 45 ENGINE SPAN 544 CHANNEL4 LBS AMERICAN P40 TOMAHAWK 29 TO 45 ENGINE SFAN 554-CHANNEL4 LBS GERMAN FW-1902910 45 ENGINE AFAN S44-CHANNEL4 LOS ITALIAN C205 FOLGORE29 ro 45 ENGINE SPAN 564-CHANNEL4 LBS what expect will shown experiment wonder also 205 truly good its fame suggests sheer momentum keeps going E2 14 After seeing airfoil Wind song have curious about ever since Right away shape airfoil should tell something designed like rest Eppler pack 193 201 203 205 207 209 385 387 exception 211 needs stripped off mighty Windoongs back spected closely FX 60-100 Like Clark-Y airfoil came flying colors tested Althaus did better predicted Eppler something Special about FX 60-100 Clark-Y have entered world experimental error isnt airfoil popular since has such low drag experimen tally compared other popular airfoils HQ 15/90 25/90 airfoils im press people want know what Quabeck has published airfoils designed sophisticated way Apparently designed like old NACA series air foils except time Quabeck did wind tunnel would like shed some light very grey area MB2535 15 airfoil has always attention anything intense E205 vs MB253515 debate Eighties started terest airfoils Frankly thought side 15%-thick foils 100% crazy because really believed thicker better Eppler results proved Now however after comparing inadequate theoretical model experiments airfoil after airfoil Im quick believe Eppler results anymore time put two wind tunnel com pare bias have hunch MB does have some surprises store us S2027 airfoil redesigned MB2535 15 better theory suggests Can believe theory airfoil letters have received seems just good betterbut experiment can say sure S3002 have told reliable source airfoil wont get out its own way Id like get wind tunnel reevaluate reliability sourceno hard feelings S3021 airfoil designed improvement over E205 recent wind-tunnel tests Althaus airfoil flight tests 25-meter Algebra equipped airfoil seems have accomplished its goal certain Althaus needs test 205 comparison event plan test both Princeton convince selves S4061 thoroughbred could Paul Carlson fly flat-plated Prodigy Nats win After building flying Prodigy own think its super airfoil/plane great LID must come airfoil doesnt show up wind-tunnel tests trouble S4062 new lower-drag higher-Rn version 4061 large cross-country Sailplanes According Eppler program possible design airfoil lower drag higher L/D new true real world however Only wind-tunnel ex periments can push find limits 4062 start will first candidate new line non-conservative airfoils Stan Watson has started construction too 1986 InterBatioBal Postal ChalleBge held last September scheme clubs around world fly th same tasks same day own fields count top five scores club see won No prizes awards given idea great because gives club opportunity compete friends overseas Thats wonderful thing about hobby/sport can travel almost country world find some folks enthusiastic about flying Sailplanes Reinhard Werner West Germany coor dinator 86 event member winning Versmold Club club spe cializes flying wings Lets let Reinhard de scribe effort Five clubs competed once again third time row flying wing nuts Germany managed place top did Continued page 159 ANNUAL RADIO CONTROL EXPOSITION TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO APRIL 10 11 & 12 1987 presented Weak Signals RIO Club Toledo Ohio Exposition information available contacting Wayne Veager co-director ticket address shown below ADVANCED TICKETS may ordered sending self-addressed-stamped busi ness size 4 x 9 envelope Tickets 38235 Castle Romulus Michigan 48174 phone 313 941-6661 Canadian orders must contain International Postal Cou pon US Stamps orders above 5 tickets must contain extra postage Include check money order US funds made payable Weak Signals R/C Club along 25 cents per order handling charge must state expo days tickets used prices $400 per day adults $100 per day children 12 under Deadline ticket orders March 31 1987 Ticket sales final non orders program will returned near mid-March Tickets also available door COMPETITION CLASS NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models COMPETITION BOAT MILITARY SCALE BOAT HELICOPTER PLEASURE POWER BOAT R/C CAR WORKING VESSEL-UNARMED May1987 155 QUALITY PRODUCTS SINCE 1964 NEW SPECIFICATIONS Wing Span 59 Weight -48 LBS Engine 452 Cycle Radio 4-5 Channel CONSTRUCTION Balsa Wood pre-painted finished cover Fully assembled except installing Wings Tail Section Landing Gear Engine Radio F Tn-Cycle Gear Introductory Price 1 4800 Reg 22800 prices include Engine Mount installed Tank Control-Rods Canopy Servo-Tray Landing-Gear Tire Two Floats Linkage Accessories DEVELOPMENT COFree Delivery Models -- P FULLERTON CA 92633 X 2406 879-3266UOrder Prepaid Check 690-2019 win Because flew tnose terrible wings Well yes think its less psychological phenomenon Because some fellows actually believing old fairy tale self-imposed handicap appearing flying field extra-grim determination Determined know give wings true F-O-B treatmentfly burst competition fact first some spectacular burstsonly zero score crossing safety line Besides having fine weather really good winch some 25 kw 16 enthusiastic com petitors will course also help compile ac ceptable team score time two models genuine experimental status took part proceedings Both Dieter Perlick Dietmar Koker came up weirdlooking designssome hilarious booms sticking out aft wings some peculiar tail feathers fastened so-called tailplanes believe Being no dogmatists course allowed take partand dear fellows placed first second Gave us some thing think about bet Other clubs competing Brisbane MSC Australia MBC Vogelweide ModelingAustria Pelican SAUSA Wellington MAC New Zealand Top fliers Pelican Team John Gunsaullus Doble Dr Walt Good Samun Rick Bonnell Windsong Ed Berton original Carl Schrader Sagitta 2m 1987 IPC just concluded having flown last weekend March year three rounds Duration Distance again Ill pass along results available Also Ill try give info entering 1988 IPC Dodgson Designs New 1987 two-hour video tape now available has great flight sequen ces plus Bob D giving design philosohies four planes stable 134-in-span Windsong 60-in/72-in Pivot Plus Two-Meter Pixie 100-in Camano flying shots include slope flatland contest footage Especially impressive Dave Banks hand-launching climbing out Windsong fliers think market Dodgson kit will find quite few items interest after watching the tape think going find hard resist reach ing checkbook Bob hoping wontresist Actually Bob deserves lot credit mak ing sophisticated multi-channel kits available American Sailplaners Sailplane kit manu facturers have come gone 14 years Dodgson Designs has existence Bob has stuck ideas successful Specifically has always maintained Sailplanes ailerons flaps offer greatest versatility serious contest-minded flier might say Bob has ahead time because more contest fliers going concepts Also buy Dodgson kit youre getting extensive background design development testing plane will perform advertised built set up specified tape available VHS Beta 8mm Its perfect club meetings weddings bar mitz vahs whatever Send $10 shipping handling plus $15 deposit $25 total Dodgson Designs 21230 Damson Road Bothell WA 98021 Attention Scale enthusiasts Bob Banka Scale Model Research has Foto-Paaks 32 Sailplanes 14 powered Sailplanes available Foto Paaks contain eight 30 full-color 3/a-in 5-in photos taken modeler mind show details like instruments spoilers flaps paint schemes markings Prices range Float Model Introductory PriceTail Dragger Introductory Price 2O8OO Reg 298 001 48OO Reg 22800 MILLING MACMINIS INI 11I0 surun For Adetion Modeie BLUE4iDGE MACHINERY AN~LS INC POBoet3t-WV25026 N, CoM,gSI384503538I J [DCO SKY D[VI[ 65 Ignition Approxcd 90 Day Warraisty Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORD[R DIRCT T&D RESEARCH AssoclArEs 6371 El Cajon Blvd Suite 115 San Diego CA 92115 51 FOR BROCHURE May1987 159 CUTTING TOOLS BALSA STRIPPER Precision stripwood easy Master Airscrew BALSA STRIPPER Strips up 1/2 wide 1/4 thick can cut quickly accurately trom sheet stock ver nier wheel advances %2 per turn adjustment precise stripper comes standard type 11 hobby blade unconditionally guaranteed against failure five years S495 suggested retail Mco-*StabIe available dealer WINDSOR PROPELLER CO $7 $19 Some ships slso have Koku-Fan three-view drawings svailable Xerox copies three-views magazines other sources Bobs complete list over 400 Foto-Psaks available $2 plus long SASE address 2334 Ticonderoga Costa Mesa CA 92626 special arrangement Bob send long SASE address end column Ill send Xerox page contains Sailplanes Motor-Gliders Second International First US F3H Cross-Country Contest will sponsored Thousand Oaks Soaring Society TOSS July 9 through 12 event has both FAI AMA sanctions F3H rules will strictly followed site Taft CA weather advertised being hot very good lift annual contest TOSSbut first time American club has obtained FAI sanction full de scription F3H International events see Larry Jollys May 86 Model Aviation report First International Cross-Country contest held South Africa December 1985 Larry won contest nosed out Joe Wurts 1986 TOSS X-Country complete contest info write Chuck Griswold 1646 LaJolla Drive Thousand Oaks CA 91360 F3H Fanatics can warm up Second InterW1.i *sts 132 ea / RAZOR PLANE new Master Airserew RAZOR PLANE uses heavyduty industrial blade held place two locating screws allowing cutting depth set very rigidly accurately plane has variety uses ding smoothing contours fuselages cowlings shap ing edges thinning strips making custom-sized strip stock frame blade retainer made tough Lesan plastic should prove almost indestruc tible normal use$495 suggested retail 384 Tesconl Ct Santa Rosa CA 95401 national entering Santa Maria Soaring So cietys Seventh Annual X-Country June 6 7 single-launch event over 25-mile triangu lar course California Valley will big barbeque raffle Saturday night Contact Larry Turner 323 Noguera Place Arroyo Grande CA 93420 Third Annual Western US RC Soaring Championships will moved Merwin Ranch Modesto year Dates June 13 14 event growing countrys biggest decided Modesto way lodging dining did Courtland Also Modesto RC Club assuming responsibility whole shebang Get details Dave Darling 2705 Harvest Road Modesto CA 95355-3430 Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 49 promotional material Goldberg al ready catalogs printed about 2000 bound After about hundred phone calls between Hazel Dan Ueberman Goldberg conferring lawyers moans groans considerable con versation figured best thing could would sit back have good laugh must say have con troversy about name new product am glad Carl Goldberg Models Right off offered change name pull advertising Although both us well introductory programs felt would easier less expensive us change name product instead Now needed new name could continue introductory program Back fort hustled change catalogs resurrect already-sent magazine advertising tried conduct business normal Hazel Maxey boys job renaming new covering material finally came upon idea tying new covering material Supercoat Dope natural already decided match colors covering dope anyway So its back mundane ordinary life Sig have experimenting new cyanoacrylate glue lately need real good catchy name Maxey wandered other day suggested Ultra-Jet Hmm what think think people Sig Goldberg perfect examples fact treat everyone right maintain sense humor can make living hobby Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Old-Timers/Mathews Continued page 51 lives have absolutely no business out flying model airplanes three four days highheat/humidity weather tragic death such occurred last years SAM Champs points out too clearly such activities ill-advised types played tennis year round jogged some such regularly perhaps lesser hazard would present nature model-building activities us get littleif anyreally strenuous exercise such us go running around countryside heat summer chasing model airplanes truly fool hardy seems sort contest aimed old folks like us should placed south Continued page 162 NORTHEAST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 e 207-490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 See local dealer call us referral 160 Model Aviation Leader Small Airfoil Technology MASTER AIRSCREW BEL-AIR 60