Airmaster

NO OCR TEXT NO OCR TEXT outside loops ground attitude shown plan allows canard kick early takeoff run reduces amount elevator necessary rotation Since using twin 40 engines put prototype through extensive ground tests hard dirt runway before first flight tests way could identifi changes made second prototype early game Designing something original has its frustrations During high-speed ground runs taxi tests glow-plug-size pebbles scattered along dirt runway kicked up Left Rather functioning tail sa tfle lower vertical tin supplies necessary fin area behind CG Right Close-up battery/receIver bay receiver Ni-Cds packed neatly foam pipe insulation case forward Spring-Air nose wheel unit C Left The canard wing attached nylon bomus inwung ii cushy removable access us ins inronie servo ana yar iranspori i ne yore ana aft fuel tank compartments can accommodate tanks up 12-ounce capacity Right Lite Ply lower hatch has removed expose four fuselage bays Note Spring-Air retract valve behind rudder retract gear servo 20 Model Aviation Biplane lovers might want try canard get two lifting wings no rigging problems Left A look underside canard wing shows elevator servo installation 1I plywood keeper holds elevator servo place flush servo installation can prevent damage fuselage event mishap Right Although aileron servo carried well forward wing servo lead extension must still used reach receiver front fuselage Y BALSP 11I- STOCK LE IGHT I4RE IF COULD Ju5T1141N&5 REACI BITGOTA - E 36BLSA Im TTaKFL sTocis PRE-FORf1ED R SHT/ ii IEIIWWI3 AL frASTER3 RI CflP8 PLY I ATc PLY rRIC CANARDEL 0 4 O~1T7i SECTAA FFW FUEL TANK SUPPORT 7j AA 0O~AkU AAAAA0A7 JOAAO OS AV ff7L2 S4SATOCANOTLO4O7A AY-OAPLYWOOA nose wheel passed through pusher propeller damaging tip Raising aft engine inch minimized problem second model meant redesigning upper vertical fin rudder ensure clearance pusher prop stone problem never developed grass runway Incidentally full-scale airplanes such Dornier 335 use fender nose wheel prevent prop tip damage See article RC Push-Pull 240 April 1989 Model Aviation As full-scale tail-first designs test flying determine desirable center-ofgravity CG particular model can unpredictable Dr Heinrich Focke lost life during experiments CG location Focke-Wulf 19A canard late 1920s fact its first fli2ht Airmaster number never left 10-foot box Camera ready stood beside runway estimated takeoff point two 40s full throttle model executed perfect 10-foot-diameter loop immediately after lift-off Test pilot Al Camp startled instantly chopped power whereupon model completed loop firmly olanted its 22 Model Aviation During early stages design construction author checks location lit related parts installing temporary subassemblies major canard wing parts one-piece elevator ready assembly rugged ca nard wing uses efficient airfoil section instead conventional flat-plate design Left balsa skins preformed soaking ammonia water wrapping around suitable cylindrical form Allow skins dry before use method minimizes locked-in construction stresses eliminates big pile wood shavings Right aft fuselage bulkheads vertical fin rudder parts isid out relative positions As noted lower fin does function tail skid Full-Size Plans Available. Page 204 FUSELAGE TOP VIEW ThjA PASAHITHHAAALASTAPSBEETSBS RUBBER BOBSSAS BALSA STEET ---~SBAPLS// eK CSOeASH TASAAAH{A BEET OCATIASOCAAHSB BALSA SASET S HA THACTAS AIRMASTER ENGINE OPTIONS SOSSASEASESBASAASBLAS5 SB HUHSs pA B ASP PB HP S AT S AS S A BA S H A/BPIAAT-PJELESALES BOB SERVOTRAYSSECT ALETH ASS AHUEL SAL ASSTAABAAUASA SASET PBSHI ABSAWlS SSAISS AA IA PASBPLSL FUSELAGE SDE A ___AAIISTABAAHASATSAA I-S7~SSPAH AAASSBHBASHSSIAAIAASJTP SHSBAAATSASAAAEH / -HSTHSOISIBAASA -HA-STBALHSSSLSA SATSASBALSA -~-SABET ASS SA PSAPELLEBSAPS ALL BAHESAL H BEAUS BBLSB AH~FNSIIPPORi SSSBEIHSLASPLSF AFWFESAEEAHPB1 -TWIN PUSH- PULL MODEL AVIATION AIRMASTER DESIGNED BY AL MASTERS TRACING BY OE DEMARO three wheels spot theyd vacated about second earlier photo managed snap caught moment lift-off clearly shows result full up control down elevator very effective elevator no damage achieve necessary design changes made new fuselage Airmaster number two Adding four inches nose section moved nose gear forward permitted shifting retract gear servo air tank valve system main wing forward fuselage front engine four inches farther forward less ballast would needed balance model ballast required achieve correct center-of-gravity four versions second prototype first tested K&B 61 engine pusher aft position Walt Paris club secretary drew first honors rewarding flight Two vertical fins added wing tips offset added fuselage area forward CG although later removed adverse effect directional stability designed both firewalls accept either 40 60 engines blind nuts both sizes mount place Once flight tests completed 60 pusher version simple matter add K&B 40 up front replace K&B 61 OS 4OFP pusher spot Voila twin structural problem has occurred upper vertical fin rudder section Knowing experience pushers rough tail sections purposely beefed up fin attach area Using rudder fin try knife-edge flight can subject flight loads such magnitude both can pass through pusher prop break off Hence vertical fin rudder post sandwiched between two plywood supports sure use epoxy attaching assembly fuselage Relying CyA area did second prototype can result loss pusher prop destruction model vortices pusher prop tip may create bending stresses rudder great enough cause break Guard against using medium-hard balsa rudder make sure Airmaster could handle less ideal field conditions Ray Doan did final flight tests too recently mowed grass strip other club field can confident design has thoroughly tested canard airframe easy build youre given choice engine configurations retractable landing gear enhances models appearance Finally biplane lovers get two wings rigging problems August 1991 23 Looking down completed canard structure elevator elevator servo will removed covering hinge points will installed last Nylon bolts attach wing Construction Regardless section prefer build firstwing fuselage tail componentsbegin making formed A-in sheet balsa top fuselage youre ready add fuselage will thoroughly dry Select two sheets 4-in-wide A-in thick medium balsa 36-in-long stock Cut 12 inches sheet soak four pieces ammonia water least five minutes Drain wood wrap piece around cylindrical form Use whatever have hand cardboard tubes soup cans held together tape coffee cans etcthe diameter isnt critical Hold shape masking tape assemblies drying begin R-A wheel well has partially opened Rhom retract unit being fitted Both Spring-Air Rhom systems work well author prefers Spring-Air unit cause runs air line has positive downlock event air loss has easy-to-mount control valve making kit parts Fuselage Use two sheets -in Lite Ply sides 6 wide 48 long Placing sheet under plan side view locate endpoints straight lines OC BCROT CANARD PLANPIE CEr BALESSTERN noo 50CANARD DETAIL N SOOTSABS N RAXAONA ~NRORCOfle~TOCjAOT -N NONROOCCANARD DE CANARDBRACED ATRITS NOT NNOAN ON LEFT F 2 NONRCA ROLSA OR 000CR PANEL FOR CAN TOCEAANO EASELRARNA EAAR SANONA 0T V _I WING LANP VIE pin pressed through ply Locate thrust line same way will serve datum line Connect pin marks straightedge ball-point pen curved sections two wing saddles can traced after slipping carbon paper between plan plywood Cut out first side Mark thrust line bulkheads three x -in longeron positions Make side full length extending past firewall end youll trimming suit engine dimensions later Sand first side outline use pattern tracing second side has cut sanded hold sides together masking tape sanding matching size Take moment differentiate right side left bulkhead lines thrust line should inside surface side Draw lines second side mark longeron positions well Attach longerons CyA Let upper extend above side will trimmed accept top sheeting later see F-2 plan simplify tracing bulkheads formers have arranged near edge plan Always include vertical centerline making parts take utmost care cut 24 Model Aviation two I32 music wire aileron links pass through K&S lIs-in-sq brass tubes Epoxied place tubes can neatly covered over grooved balsa triangle stock Except installation aileron up per left wing panel structurally complete aileron servo must used ex tension reach receiver front fuselage Wing construction methods standard straightforward completed Airmaster structure sits its trigear ready covering Full-Size Plans Available. See Page 204 00000 T00T0E008 802 ROLSO 1 27TT i 7{ILI jII ~ Li ~Th2JT 8880 ______________ EL VA OR V i8000 SD $ DETAIL 0C OS 88 88 088 0ISW-S000080o~ooooSECT A-A L G RIB80WHEEL WELL DETAILLA MOUNT 08O00LO0000008000~ooE800O8V 000000 L 8080 00LS8000 0008L001880OJ80J0 -7 k o -18 $ooo 0 TV fl n /\\ /4Q W 8o WING0 NT 00 0800-* L7 _____________ WING TIP FRAMES DIHEDRAL BRACESDETAIL0O 0 000ROLSO 040 I I 800S00G __ - ____ 008000 I 0000000208 MODEL AVIATION AIR MASTER 0000 0W800S 000 000000DESIGNED BY AL MASTERS 00 00000000 00000 08005800 OO 0E00L ING BY JOE DEMARCO 0000080008 8000 8000 0800 00 8000000 0800080 NIRNYS RESERVES SD 0D -- 7LK-~ ItB KBy~4KtiIv itthat sides remain parallel bottoms square sides slots fin supports F-7 F8 aft firewall AFW must accurately cut Make sure fin supports fit snugly slots Also test fit %-in balsa sheet will used vertical fin fit should loose Choose engine installation point decide twin configuration have engines different makes use heaviest tractor Mount engine align thrust line firewall cant desired Note position engine respect fuel tank carburetor Mark firewalls install blind nuts Position nose wheel retract F-i secure blind nuts Fults RF 500 fixed nose wheel unit can used retracts will installed good time trial fit fuselage sides bulkheads pressed place parts will hold together nicely can work out arrangement Left tractor engine should canted exhaust outlet clears canard leading edge fuselage length trimmed fit engine chosen case K&B 40 Right Make sure rudder horn pushrod installed correct side proper coordination nose wheel steering author correct shown 05 40 wIth standard muffler has fitted pusher spot Trim section aft firewall suit engine pilot optional fuelproofing sealing engine compartments August 1991 25 0--I Continued page 92 Al rmaster/Masters Continued page 25 Ni-Cds receiver servos check fit air tank Its also helpful drill holes control rods point Begin fuselage assembly supporting uprights sides epoxying front firewall place using F-5 spacer elsewhere theres no need humongous gobs epoxya thin layer will suffice epoxy has cured bring aft section together epoxy aft firewall place Hold clamps tape until epoxy has cured Sight along assembly make sure both firewalls match up vertical centerlines Force remaining bulkheads place Verify everything alignment sighting along assembly checking vertical centerlines youre satisfied lock parts together shot CyA Recheck trueness correcting necessary before double gluing F-i F5 epoxy Push two fin supports position flush tops bulkheads Use epoxy bulkhead contact points area Set fuselage aside Canard Build basic frame directly over plan protected layer waxed paper equivalent Pin 4 x A-in rear spar / x /2-in subleading edge over plan Since ribs flat bottomed prepared shim leading edge scrap balsa necessary Glue /32 balsa sheet ribs Fit dont glue front rear -in plywood braces four slotted plywood center ribs Accurately position subassembly lock place CyA Double glue plywood joints epoxy Cut top bottom /I6 plywood center sections making sure grain $15900 Postage & Handling Color Catalog nine other quality kits $300 info write Call 517-781-3000 Fax 517-781-4322 AERODROME MODELS LTD e 2623 5 Miller Rd e Saginaw Ml 48603 running shown plan wood can formed over ribs Locate canard wing bolt centers fuselage plan drill two -in pilot holes bottom center section piece Accuracy center-to-center dimension important servo clearance front-to-rear location can vary slightly Remove partially completed canard panel building board attach bottom center section piece epoxy clamps Glue two vertical-grain hard balsa fill blocks sanding flush top plywood ribs Attach A6 plywood top piece epoxy clamping place Starting -in pilot hole side drill two holes No 21 159 drill Drill through blocks top piece Complete canard adding A6 x 1-in balsa sheet rib caps -in triangle-stock leading edge Tapered elevator stock used canard tips Elevator cut 3/ x -in elevator stock Cut lightening holes Drill -in holes Robart hinge points mark drill rear spar canard matching holes Remove material top surface elevator core will accept 3/ plywood insert top-mounted control horn Complete elevator adding /~ Continued page 96 FLYINGNEW FREE FLIGHT MICRO-4 MOTOR FOR 511 TO 10 SQUARE IRER MODELS MANY lOC & 25t tIT DESIGNS SUITABLE ENTIRE SYSTEM VEIGHS 20 GRAMS EVERYTHING NEEDED TO FLY motor nicads pops switch charger pnrtstless 3 dry cells FREE PLAN INCLUDED 1 l95S2~ Postage end Handling 92 Model Aviation nepeciaIists OVER 1000 TOOLS & ACCESSORIES Brand Names. Unusual Items. Exclusive Products savings up 40% designed make project easier enjoyable professional I I ITO ORDER Send 61 00 coupon br name address toADDRESS MicrosMark s3401039 Snyder Ave Berkeley Heights NJ 07922CITYSTATE________ ZIPJ - ————————————————— plot airfoils dot matnx printer with.. FOILED AGAIN! PLOT AIRFOILS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNEsS CAMIIER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR SJSERFEIENDLY MENU-DRIVEN OPERATION INCLUDES SI AIRFOIL FILES 26-PAGE USER MANUAL $4500 i,,,i,IbankdO,OSSSS Otqi, IOM-PC/X1*T ,pIiflI3--Ci0 ,,0,r & roirno pp 0 do,gsp,i 525 o3S Piok CYGNET Software619 792 8012 3525 Del Mar Heights #237b San Diego 92130 Inson Iu last time really enjayed building kit Stinson high quality hand cut kit lots vacuformed extras piece detailed Fiberglass Cowl Wire parts pre-bent complete hardware package included Kit requires 5 servos 7 flaps Wing Span 74 Wt 8-9 lbs Engine Sizes 60-120T FS 60-90 TS Plug Wing Panel easy transporting Go ahead Spoil Yourself Deserve f DescriptionPriceOty Amoun _I__ Ii__ No handling charge/USA order over $50000 ERICANHANDLING CHARGE________ order 7/a% Tax TN Only _________ Card order Order ____II____ ___I ___ Sub Total __________ Handling ___________ TOTAL ________ Hmidllna Chars far Persian Orders actual costace duo $500 will hold order noldv Eat once $ amount needed shipping Name Street Address CityState...ZipI EMasterCard EVisa ElAmerExp EDiscover Exp Date______ Card No EShip COD EMy Check enclosed $ LiJust send FREE catalog MA J HOWW BB INTERNATIONAL INCn 5614 FRANKLIN PIKE CIRCLE BRENTWOOD TN 37027 615 373-1444 Fax 615 377-6948 Al rmaster/Masters Continued page 92 sheet balsa both sides hinge points will installed after covering Set unit aside Wing Trace cut set ribs following plan conventional way use templates making other set Finish-sand ribs pairs Cut dihedral braces rib doublers specified plywood being sure make right left set rib doublers Use -in ply doubler wheel well Glue rib doublers respective ribs Drill doublers holes will accept retract air lines choose install retracts standard fixed-wire gear grooved blocks mounted suitable plywood rib doublers may substituted Another suggestion standard formed aluminum gear mounted plywood forward main wing design shown has tested wide main gear tread gives excellent ground control gear should held length shown plan Cover plan protective film Cut four straight x -in balsa spars length Glue lower dihedral brace spar halves position spar over plan Secure pins weights Position ribs 1 12 spar making sure construction tabs work surface Make spar notches larger ribs 1 2 fit over dihedral brace Pin x %-in trailing edge TE / x h-in sub-leading edge place ribs aid alignment ribs perpendicular work surface CyA spar sub-leading edge trailing edge Glue upper spar place Block sand upper surface trailing edge slightly follow rib contours Add %2 balsa TE sheet 2-in stock allowing enough length extend past location yet-to-be-added rib iC Add four hinge supports vertical-grain webs between ribs 1 12 Slip rib lC place spar l/ off work surface rib 12 position perpendicular work surface Trim %2 trailing edge sheet centerline IC Glue latter trailing edge TE sheet lightly tack glue spars sub leading edge Set panel aside build second same way Enlarge spar notches ribs iC 1 2 accept spars -in plywood dihedral braces Elevate first panel 2Y4 shown plan butt join lower spars Fit clamp upper dihedral brace Make sure fits flush slightly below spars since its difficult sand down later Razor-saw leading edge dihedral brace clamp position Check over subassembly making sure spars run straight tip tip glue joints CyA Take care keep glue off clamps Remove clamps carefully turn wing over clamp CyA lower dihedral brace Add four 34-in triangle braces ribs 1 2 Complete spar webbing center section Cut off construction tabs Add plywood wing mount mount should flush tops ribs 1 lC center section top sheeting can fitted over Bolster area /2-in triangle stock Use soft balsa blocks youll drilling wing bolt access holes Make blocks 1 /2 sides drill Y4 -in hole through inside center hole over two pilot holes wing mount CyA block place Repeat other block Sand blocks flush ribs Make up fit main gear retract mounts have used both Rhom-Air Spring-Air units over years Either satisfactory Spring-Air system runs air line has positive downlock event air loss features easily mounted control lock Its important wheels extend close center-of-gravity possible main gear down reducing canard loading minimizes elevator input required rotation prior takeoff Main gear struts should /32 wire wheel wells deep enough either 850 900 units can made fit Position glue 346 plywood gear mounts Add adjacent triangle stock supports Feed air lines storing aileron servo bay Close up center sections complete wing Continued page 100 96 Model Aviation Continued page 96 sheeting Open up wing bolt access holes true up openings sandpaper wrapped around piece %-in dowel Make template wheel well strut cutout areas use trace outline bottom sheeting Cut out balsa sheet rib sections required provide necessary clearance gear Reinforce area %-in sheet scrap balsa indicated plan Complete wing adding tips leading edge LE rib caps Microns Cut two aileron cores x 1 /2-in aileron stock Cut out lightening holes cover core /l6 lightweight balsa sheet Drill four holes hinge pins using A-in bit Drill /32 hole torque rod Transfer hinge locations wing drill wing match Trial fit ailerons hinge pins torque rod assemblies everything alignment epoxy brass tubes wing trailing edge Remove ailerons final sanding covering Sand top wing center section shape leading edge final form se wing can trial fitted wing saddle Make absolutely certain both sides fuselage meet top wing same angle Sand saddle good fit wing Remove wing Epoxy wing holddown blocks clamp place until glue has cured wing leading edge centerlines drill /6 pilot hole through leading edge %-in plywood LE brace about 1 /2 rib iC Keeping drill perpendicular plywood LE brace redrill hole /l6 diameter fit dowel same size Insert dowel wing hold wing saddle assemble F-5A over dowel A-in ply piece permits adjustment wing Tape wing place check recheck alignment directions youre satisfied clamp F-5A F-S inside Using wing mount pilot holes guide drill through hardwood blocks %2 drill Remove wing tap blocks /4 -20 wing bolts Redrill holes /4 fuselage can now completed Carve away middle longeron battery/receiver bay shown section A-A plan Add fuel tank supports Fit servo trays place Epoxy A-in plywood canard mount place Using canard guide drill through canard mount No 21 drill 159 Tap two holes 1032 nylon wing bolts ream wing bolt holes canard Y16 bit Bolt wing place Apply vaseline /6 dowel hole F-5A push piece /16 dowel through F-5A wing Epoxy F-5A place Remove wing epoxy has cured remove dowel wing latter will epoxied place after wing has covered Close up fuselage top now thoroughly dried preformed balsa sheet Carve top longerons down angle fit 24-in pieces between F-2 F-6 refer section B-B plan Trim pieces required glue place inside hold sheet against bulkheads longitudinal seam can made anywhere top no problem section under elevator can little tricky junction curved sheet angled A-in cross-grained balsa sheet piece Make paper template piece keep cutting trying till get right aft section sheeting first install formed sheet F-6 F-8 leaving %-in-wide slot vertical fin Add some small Y8-in triangle stock pieces F-8 support sheet bulkhead seam Although plan shows two pieces sake clarity youll actually gluing three four Carve triangle stock pieces correct angle sheet transition before fitting sheet Since section 100 Model Aviation Airmaster/Masters compound curve youll have cut piece sheeting Extend sheet well aft AFW trim behind firewall will depend aft engine installation Apply pressure sheet use CyA inside will no aft engine balsa block can added shaped builders choice Hatches Epoxy hatch anchors place Install 4-40 blind nuts Cut piece 6-in-wide Lite Ply stock length lower hatch glue hatch tongue end Screw six 4-40 socket-head hatch screws blind nuts inside allowing %2 protrude above nut hatch blank place press indent material screw location Drill holes screws attach hatch blank Trace outline cut out hatch opening retract nose wheel strut carried forward permit hatch moved aft clear tongue screws removed hatch can lifted clear nose wheel complete access underside fuselage youre using fixed nose wheel make hatch U-shaped strut allow removal Trial mount front engine trim fuselage desired length Add shape balsa block chin no engine will installed front block area round off suit Fit front hatch Fins rudder Use %-in-thick balsa sheet vertical fin rudder post %-in plywood Carry fin material plywood post bottom /32 plywood fin supports fuselage Cut lightening holes treat inside edges holes CyA Cap leading edge %-in balsa triangle stock lower fin doesnt function tail skid contributes needed fin area behind center-of-gravity Make 1A-in Lite Ply %-in balsa triangle stock Cut rudder elevator stock Fit inlay /32 plywood control horn Make holes rudder hinge points Covering assembly Play inside goodies convince yourself theyll go Remove cover structural components favorite material Cover vertical fin down its point entry fin support slot Since glue joint critical area should left exposed Cover fuselage fin epoxy latter place Cover lower fin epoxying place take great pains ensure its absolutely congruent fuselage centerline upper fin post unit Fuel Around Anything Smaller new 32-ounce super-capacity fuel tank #395 biggest can get Sullivan major manufacturer can get Dont wony making plenty em So can sure enjoy longer exhilarating flights ever before fewer stops refueling new BT-32 equipped vent bubble can always get full 32 ounces fuel tank Its versatile too complete kit includes both glow fuel gasoline tubing stoppers also comes standard Sullivan hdwe easy installation maintenance tank equipped forward extensions protect valuable tubing course something smaller mind Sullivan offers 48 others choose So no matter what youre looking fuel tank thats aiu1IIiij pretty good reason take off yourJPRODUCTS dealers store right nowPD Box5166Balumore MD 21224 Getting Better Ideas Off Ground Before epoxying hinge points place treat hinge centers petroleum jelly guard against loss hinge action after epoxy cures Epoxy wing dowel place Add canopy provisions pilot desired Always fuelproof seal engine compartments Install nose gear rudder servo rudder control rod /16 music wire running through Nyrod sheath Its attached rudder horn Du-Bro 2-56 swivel ball linkage prevent flutterinducing rudder play Use servo extensions facilitate removal both canard wing main wing Leads can extended changing plug socket cutting three wires soldering required lengths stranded extension wire purchased Radio Shack Du-Bro heatshrink tubing used over solder joint larger shrink tubing over threewire joint bundle Choked extensions necessary FM PCM systems used four prototypes Mufflers Its preferable mandatory change position aft engine muffler exhaust directed rearward Standard mufflers used test models Some muffler Continued page 102 August 1991 101 outlets can sawn off 45-degree angle desired 05 40 muffler outlet can rotated achieve suitable exhaust direction Muffler styles available 05 40 HB 40 pusher installations others may available well Propellers An important caveat Because location rudder lower fin pusher prop must exceed 10 inches diameter Also avoid highly flexible style pusher prop especially 60size engine aft spot have specified three-bladed unit Grish Magnum series because type prop can absorb high power larger engines CS COMPETITION ENGINES CSG049NORMAL ABC28K RPM$14200 CSG049SPEED ABC35K RPM$14900 CSG061NORMAL ABC27K RPM$14200 CSG061SPEED ABC35K RPM$14600 CSG09NORMAL ABC27K RPM$13700 CSG09SPEED ABC35K RPM$14200 CSG15PSPORT SBB18K RPM$ 5500 CSGISNORMAL ABC27K RPM$12900 CSG15SPEED ABC37K RPM$13900 CSA15SPEED AAC37K RPM$14900 CSD1STRDIESEL AAC23K RPM$16900 CRC15TEAM RACE CARB DIESEL$ 5900 CSG212 ABC18K RPM$12900 CSG21SPEED ABC28K RPM$13900 CSG21NMARINE ABC28K RPM$14900 CSG602 ABC 2-18K RPM$15500 CSITUNED PIPE 049-081$ 2900 C59TUNED PIPE 09$ 3100 CS2TUNED PIPE 15-21-60$ 3900 CSHGLOWPLUGS 049-15$ 399 CSRSPEEDPAN 049-09$ 3995 CSWSPEEDPAN 15-21$ 4695 CSPCARBON RACE OR PAl PROPS$ 1475 ALL ENGINES ARE TEST RUN BEFORE THEY LEAVE THE FACTORY GUALITY OF WORKMANSHIP ANTY YOUNGSTERS SPECIAL SS 15 UC DIESEL $2775 CS iSP UC GLOW $4775 MUST BE UNDER 16 YEARS OLD FOR THIS SPECIAL PLEASE! ename m Must have expiration date MoeCfatlbz5bl LAnai IflflI RecognizedCSA CertifiedA Andersen File No3J File No E26226LR251 54wPmducfsInc Only certified checks money orders accepted Minirnom order $1400 three packages 4 Pomerpoles $400 per package $200 shippiog handling CT residents add sales tan Prices subjecn change notice DEALER INQUIRIES INVITED forther information dealer pr cnn send SASh Business Card SERMOS RIC SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 1203 322-6294 deflecting intoand chewing upthe tail section Aft fuel tank After much testing put fuel tank clunk forward position clunk line should short possible still flexible enough reach tank bottom permits use shorter fuel pressure lines Avoid placing aft fuel tank too low See article Push-Pull 240 April 1989 Model Aviation Ballast everything place gear down add ballast achieve indicated center-of-gravity before filling fuel tank NEW HIGH PERFORMANCE HIGH TECH ENGINES FOR THE 908 ABC DUAL BALL BEARING SCHNUERLE RPM FIGURES ON FAI FUEL 0 NITRO NITROGEN GAS HARDENED STEEL CRANK BRONZE BUSHED HIGH PERFORMANCE ALUMINUM ALLOY ROD CIRCLIP WRIST PIN MAT FINISHED ALUMINUM CRANKCASE FOR BETTER COOLING NEW HIGH TECH ENGINES FOR THE 9OaII 21 MARINE & 60 2x2 COME WITH CARB ALL OTHER ENGINES EXCEPT 1STR COME WITH UC VENTURI & NEEDLE VALVE ASSEMBLY Ia & 15 ENGINES COME WITH BUTTONHEAD TYPE GLOW PLUG ALL ENGINES EXCEPT 15P-15TR & 80 COME WITH ALUMINUM SPINNER THE 21N HAS GROOVE FOR BELT START NEW CS PULSE JET ENGINES ALL STAINLESS STEEL CONSTRUCTION NO MOVING PARTS TO WEAR OUT USE REGULAR GASOLINE EASY START SJP1 26 LBS THRUST $18075 SJP-2 51 LBS THRUST 21575 NEW 15 COMBAT SPECIAL AND 40 QUICKEE 500 SPECIAL SEND IN YOUR REQUEST SEND NO MONEYI YOU WILL BE NOTIFIED WHEN AVAILABLE SEND MAIL ORDERS TO CHEROKEE HILL SOUTH AERO ENGINES LTD 2914 BUCKLEY AVE LAKE WORTH FL 33461 407-9658150 FROM 8PM TO 9PM EXCLUSIVE CS DISTRIBUTOR DEALER INQUIRIES INVITED SEND $500 FOR SHIPPING & HANDLING COD ADD $450 FLORIDA RESIDENTS ADD 6% SALES TAX CHECK OR MONEY ORDER PLANS & FIBRIGLASS COWL BOB NELITZ 1/3 SCALE ~ER J-3 CUB twin 40 installation requires about nine ounces ballast single 60 engine pusher spot youll need pound two lead up front rebalance model sounds like lot wing loading will still well within bounds other hand youre using single 60 up front relocating Ni-Cds receiver gear servo rear will reduce amount aft ballast required Hying own peace mind allow plenty speed buildup first takeoff run can confident Airmaster wont take off prematurely stall attitude often happens conventional-tail designs have yet meet pilot comfortable snap roll microseconds after lift-off As canards generally Airmaster predictable stable air Retract gear watch move out Looks great Whether use single- 60 twin- 40 engine installation no small overpowered airplane flitting around patch like scalded cat Its assertive flier character spare Both roll rate penetration excellent plane will loops sizes type stakes out large chunk sky spectacular tight dog chasing its tail variety twinengine rendition will stay comfortable flight either engine stopped reduced power elevator adjusted full up model appears hover almost zero forward speed sharp-breaking stall has yet experienced Dont afraid make nose-high approachespositive aileron control continues way touchdown Always remember feed little throttle final approach slow rate descent before run out elevator Doubtless its matter time before some hot-pilot builder hangs two 60s design Theyll go nicely no modifications other adjusting center-of-gravity offset added weight Take easy removing ballast experiment moving CC 102 Model Aviation PAN br juadra PLANS & COWL $7499 HOBBY BARN PO BOX 17856 TUCSON AZ 85731 CALL 602 747-3633 rearward flight character can change groovy twitchy no control allD Toledo 91/Myers Continued page 30 modules expected later year both 72 MHz 75 MHz Futaba will continue sell crystal pairs both 72 75 MHz Hobby Shack showed Excell line new addition its Cirrus line began 1972 described digitized FM/PCM system 512-bit code dual conversion narrow-band receiver accepts either 512 1024-bit code PCM PPM versions available Made Futaba prices range $110 three-servo four-channel FM set $230 four-servo sevenchannel PCM system Cox Hobbies showed prototypes dual conversion narrow-band AM receiver Cobra line now features bean-shaped narrow-band two-and three-channel transmitters $35 upgrade has announced older wideband versions radio system Cox radios usually appear high-production toys like RTF airplanes predict system will find favor among sailplane pilots Users 75 MHz systems have loss sanction 30 channels because 75 MHz AM systems wont modified narrow-band performance IMPRA International Model Power Boat Association held its Directors meeting Toledo during show invited address matter frequencies Afterwards voted sanction use 30 75 MHz channels proviso oddchannel radios must FM think excellent decision because will allow continue wideband radios phase narrow-band equipment becomes available Narrow-band FM transmitters odd channels likely interfere decent wideband receivers channels narrow-band FM receivers odd channels should ignore decent wideband transmitters channels decent wideband system would qualify old RCMA/AMA silver sticker some discussion beginning RCMA/IMPBA sticker system 75 MHz radios nothing settled Now lets look some pictures showD RC Helicopters/Jolly Continued page 31 glass tail rotor blades providing enhanced performance models well-known smooth flying qualities Magic 60 L Helicopter pilots accustomed counterclockwise ThkeA Load Off needs carry around dead weight Sullivan Skylite Its lightest conventional style wheel can buy Engineered unique foam core thin tough rubber skin Skylite cuts weight conventional wheel about half So can take off easier fi ion er maneuver better Whats Skylites rugged build handles repeated take-offs landings bit well its heftiest competitors never falls spring back round atter long model sits runway workbench So youve thinking about takingCIdfllij off weight talk dealer about seeingPRODUCTS light Skylite isP0 Dcx 5166 Baltimore MD 21224 Getting Better Ideas Off Ground rotor-system rotation will surely appreciate new Magic 60 L Robbe/Schluter Heli copter kit will now able enjoy Schluter engineering its fullest machine retains extensively engi neered qualities standard Magic 60 kit mechanics have rede signed accept new spur gear re verses rotor systems rotation 60 60 L Robbe offers attractive Schluter alternative pilots whether used clockwise- counterclockwise-rotation systems Junior 50 II Robbe/Schluters smallest hottest performing 50-size Helicopter now better tedious job building wooden servo trays has become thing past Schluter Helicopters sharing system 88 mechanics Like Scout 60 Magic 60 Junior 50 II now equipped plastic servo structure redesigned canopy canopy has sleeker aerodynamic shape extends yond rear side frames give Junior II whole new look newly de signed canopy matching bulkhead plastic servo structure available ac cessories existing Junior 50 Heli copters Champion fairing Originally designed option Magic 60 side fairings have proven popular effective now available Champion Continued page 108 August 1991 103