Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip
Edition: Model Aviation - 1986/06
Page Numbers: 66, 67, 68, 69, 165, 166, 167
Our author poses design prior Stunt season Aerodynamically clean destined well hands right pilot notables author has pro duced Control Line Precision Aerobatics machine capable top-level performance MY MOST-FLOWN competition ship Buccaneer 5 nearly reached end its useful career fuselage wood oil-soaked ship gained over 6 oz due oil various repairs front end literally coming apart dearly needed new Precision Aerobatics ma chine Normally would build fresh Stunt plane six months three-year hiatus building due job pressures other needs new design planning included read ing both old new articles magazines Stunt concepts designs engine/tank combination opera tion concept adopted suc cessful Buccaneer 5 Since wanted experiment other engine tank combinations designed nose new Envoy receive mostfavored engine also two others other tank design Originally Supertigre 46 Sullivan RST 6-oz tank power source providing needle valve exhaust holes building process pos sible use ST 40 OS Max 40H standard 1-in-high metal tank Carolina-Taffinder Builing way could try different combinations having unsightly modifications after plane finished painted outboard needle valve holes cut runningplastic tanks Jun Lynch has made firm believer system Dont afraid route fuel line inboard side engine using plastic tank also keeps needle valve away hot muffler using customary metal tank needle valve should inboard side overall design concept Envoy first came three most-read older articles Olympic Mk VI Sting Ray Bob Gialdini Stunt Machine Gene Schaffer Further refinement design specifications came articles Ted Fancher .. tion develop ments Gialdini Schaffer highly influ enced earlier Scimitar profile Stunter Gialdinis discussion Sting Ray 66 Model Aviation Borrowing own previous work other Allen W Brickhaus led Envoy decided new Envoy wing needed thicker better lift should also have blunt leading edge prevent early separation airflow over wing tip airfoil should thicker root airfoil should placed forward thickest section root concept delays tip stalls adds stability both turns level-flight tracking also wanted try swept-forward flap configuration see well would work theory claimed keep center lift wing moving too far aft relation center gravity Various sweep angles drawn out thought over i forward sweep finally chosen Olympic Mk Vis flaps designed 12% total wing area give maximum lift induce extreme amount drag during square triangular corners pattern Envoy flaps designed mind increased slightly 135% due heavier model weight expected wanted use foam wing flaps looked over recent Stunt designs find wing flaps suiting needs new plane Ted Fanchers Excitation seemed 650 sq size wanted Small changes flap length made original noted plans stab/elevator 235% LeTt Lead-out spacing aajustaoie Tor Tine-Tuning ana TflO Taise rib shown used hold airfoil shape priorto covering Rigni point wing ready glued fuselage Flap neutral adjustment easlerto set up using foam cradle jig Left Tail assemblies finished except gluing hinges MonoKoted before glued fuselage Right Take par ticular note opening forthe elevator control horn narrow fuselage Open shield provides small amount rudder offset June1986 67 Left fuselage must completed point before gluing wing stab Rigidity must Above 3-in belicrank shown inboard wing panel Handle line spacing must wider setup standard 3-in belicrank also works well wing area Note 53% horizontal tail area elevator 47% stabilizer thickness percentages taken Norm Whittles Eagle V design modified airfoil wedge shape ease construction Envoy wing flaps stab ele vators made foam can purchased Par Troy Sound Write care Mark Salvador Sussex Co Mail Rt 94 Newton NJ 07860 Ask Exci tation wing flaps plus stab elevators Norm Whittles Eagle V Eagle V tail assembly has true airfoil wedge-shaped tail drawn plans Both work well souse whichever best serves building flying needs Although Envoy can built allfoam flying surfaces plans also show built-up structures prefer framework construction original foam assemblies cut spar glued place false plywood ribs attaching wing-mounted landing gear blocks Both wing tail gear removable much practice flying over grass compete over asphalt concrete rougher grass areas need large lightweight wheels placed bit forward usual very short tail gear hard surfaces bolt set smaller wheels nice gear fairings longer tail gear Both gear types shown plans flying surfaces combined fuselage dimensions Bucca neer V though sketches made before final fuselage shape de termined twin rudders Olympic Mk VI Scimitar used instead single vertical stab previous design twin-rudder concept chosen keep air slipping over tips rudders channel air directly over airfoil make stab/elevator effective Also like appearance pro vided twin rudders Construction model easy build will comment few fine points wing flap foam cores will come left right panels suggest purchase wing spar two front ribs panel putting landing gear securely wish mount main gear fuselage bolt 5M-in music wire back side former wing/fuselage joint cut away necessary part wing leading edge order put landing gear close relationship wing possible gluing wing sheeting gether run grain sheeting parallel leading edge wing until near aft portion sheeting will cover flap hinge line sheeting should cut glued run parallel hinge line Thus cutting flaps loose completely-sheeted wing will cutting across grain Determine flap hinge line will Draw line over point both top bottom wing draw parallel lines t original line Cut away flaps fore aft pencil lines glue -in balsa trailing edge wing leading edge flaps After fully finishing sheeting shap ing wing cores flaps install wellbushed control system Measure mark lead-out lines determines neutral setting bellcrank will after wing cores trued up glued together Glue -in balsa ribs wing tips before adding actual tips balsa rib will help keep airfoil shape true covering applied Glue actual tips lead-out guide weight box flap horn wing afterjoining cores togetherwith 15-mm epoxy Treat tail surface foam cores same manner will ready proceed next step Klett PEG-i pusbrod exit guide glued wing tip lead-out slot strengthen slot after covering applied Fuselage Mark reference lines building board align sides form ers gluing together fuse lage doublers glued sides 5mm epoxy engine mount blocks 3/B 3/4 MAPI SCRAP BALSA WOCs1/16 BALSA SHEETINGLG BLOCKS TOP ANDBOTTOMTOP B BOYSOM LEOUcBJT- -1----POOTION-f------izIm BALSA BIBS LISHYINiII II I-1413W-12W-II-10W-9 WINS TIP S/B BALSA BALSAKLETT NYIIIN HINGES BLOCKHIK9-15 TYPICAL LOCATION BALSA I/B BALSABLOCK NASSER3/BSO BALSA LEASING EDGE 4 -ISTABILIiER -4HINGEIIII STAB -ELEV LOCATION P VIEW 4 II-4 CR055 SECTION 4T --4 1/2 3/H MOOCH BZIJN1SI-I/S BALSA BL9CK AIR DUCTHOLLOW TO 1/H F-IC 2-I/A DIG SPINNERF-I -27 7/PA -- 00 000 000 F-It L SA PLYTANKTRI-SIUCK--AREA F-IA--ESHAUST lAG2' PLY--4 L BALSA BLOCK N F-IS ST HO ENGINE SEE TEST I/3S PLY DOOBI /G PLY MOT MOUNTS GRASS LO LO C AT cR1 S/ADIA SSwKFIBIWHEELS/ PLOPLY HOLEF IP IA/H H PLY BOLSA TRI-STOCK 0I2245HHUND SURFACE glued slow-setting cyanoacrylate CyA fuselage doublers F-i F-2 set place sides pinned down building board Align components glue together Glue aft end fuselage together 68 Model Aviation Left Cowl system clean effective easy use Vents help keep engine cool Above authors son James launches Envoy Note model equipped grass gear setup Different gear setups noted text pians Full-Size Plans Available. See Page 172 i/B PLY TOP B BOTTOM -BELLERANK MOUNTBUSH LEADOUT WIREI/4I/2HARD BALSA WITH 2-3/4 8-32 THREADED RODAT BELLCRANKSPARS TOP B BOTTOMI/4E 1/OBALSA LECAPS TOPS BOTTOM-SEE DETGJLMATCH LINE BELOW -V4I/O BALSA -II--If zrrI~~.jEZLEADING EDGE IfII 4 3-41--0/il41-i~ PI.A TOP WAW-SW-3I3/32MW a1 ~W7lW-H1W9-10-IIWI --.---WIt3-Fll3- IRIBS11 I/IN BALSA FLAP SHEETING I/IA BALSA SHEETINGEDGEI/IKBALSADP WEIGHT ACCORDINGLY I/IN BALSATOP B BOTTOMLAP SHEETING RIBSEDT IAN BALSA4-40 FT BALSASHEETING[ 1-f3 B 3/4 MAPLE BLOCKTOP B BOTTOM LANONG GEAR --k1-t1B OCKS II-ofi-I---- 3/BES/B3 REQUIREDNUTP 3WI/H MUSIC WIREBLINDLANDING GEAR BLOCIS I11BALSA 3/BE 1/2 h____BALSA JI3111VVBBALSAADOUTW-14 IIRUDDERGUIDE #ELEVATR-IIIhI -2V OR /2E IILANDING GEAR ING DETAILALL RIBS S WING SHEETING TOBALSA1/H BALSA TOP SHEETING4 /0 HARDIS CONTEST WEIGHT 3/30 INSBLOCKOPTIONAL BALSA BLoaII/B I/ARUBEERBALSA SPARS SBALSA MAY BE AGEDI/BSSBALSAOUTLINELEADING EDGE 7BALSASPINE 7SCRAP FT-2FT-3/FT-AFT-SFT-BFTILINE3/5 BALSA SHEET 3/32MW II PUSHROD 3AAP ASOLDER -FU TOP STRENGTHENER\ NEUTRAL SETTINGI/B BALSA SHEETiNG\--RUDDER 3W-I L/BCOPPEHTGBE BALSA TRI- FOR NEUTRAL ADd F-3HSTOCK/-4F-S STAB -ELEGTIP RUDDERS ARE 1/BRALSA SHEET NOTE GRAIN ROOT VIEWDIRECTION USE 3/4 OZ FIBERGLASS CWTR AND T-I THRO FTIRFUSELAGE SIDE VIEW 3RMERS YPICAL V BALSA HBALSASEBALSAI/B BALSA PAGE SIDES OMITTED FOR CLARITY FT-I__________ -iF F-3A WEIGHT F-3BF-4SLENGTH RWHEELSENGINE 7VHPLY/ 4-40 BOLTS S BLIND NUTSI/H BALSA SHEET BOT GEAR LOCATION 3/30 MUSIC WIRE STOOGE HOOK 3/4 DIG TAILWHEEL HOBBY POSY II TO STRENGTHEN MODEL AVIATION ENVOY DESIGNED BY ALLEN W BRICKIIAUS TRACING BY OE DEMARCO ALL RIGHTS RESERVED SPECIFICATIONS WING SPANSB WING AREA850 SO IN SO 53 OZ 4SS 40 glue remaining formers Bolt engine onto fuselage place wing fuselage cutout Carefully align use incidence meter precise measurements satisfied alignment glue wing place CyA Stiffen wing inside fuselage joint small sections balsa triangular stock lay 2-inwide strips 6-oz fiberglass cloth inside fuselage wing joint glue clothin place quick-setting CyA length cloth should run fore aft width should extend over wing surface flow upwards upon fuselage sides better strength Both top bottom wing done way Heayily bush flap horn item takes much abuse Extend pushrod elevators toward back have fuselage-former bushings ready glue place Finish constructing fuselage bot tom rear cowl Include ply removable tail gear Carve outside dimensions canopy area arid tack-glue place Carefully align stab glue place Close open top section fuselage sheet /3o balsa Cut openings sheet access flap horn -in copper tubing neutral adjustment segment elevator pushrod Now time solder flap elevator neutral adjustments through access holes Pop off canopy block hollow dotted lines shown plans Reglue place add front blocks -in nose ring Glue two n balsa stringers top fuselage sheeting Rough-cut top fuselage formers glue place Add stringer top formers add final sheeting Wet outside bend sheeting can curved shape formers Use triangular stock corners fuselage edges will add much strength use Dremel tool sanding drum route out triangular stock lighten pieces Rough-cut cowling block mounting holes bolts can put place Bolt semi-shaped piece place carve final shape Unbolt cowl hollow dont hollow entire bloek shape inside force airflow tightly around back cylinder head -inwide slot rear engine hole narrow opening widens quickly force hot air out holes bottom cowl very similar ducting used CL Speed fliers cool engines little extra balsa weight cowl used way well worth good does ridding engine cavity unneeded heat Fill small cracks holes lightest easiest-to-sand filler know Final-sand entire plane 400 wet/dry sandpaper used dry remove dust residue Covering finishing etc flying sur faces covered MonoKote Run covering within lage Use Hobbypoxy II glue slightly thinned base coat fuselage Sand 400grit paper dry glue has cured Use Epoxolite fillets flying surface Continued page 165 June 1986 69 entry round eights Establish correct rate turn quickly possible addition round figure eights vic tims second last generic mistake month rule rather exception some very good fliers mess up inter sections round eights flying beyond proper point tangency See B Figure II What happens pilot waits too long too tentative reversing direction turn As result point tangency moves up and/or around first loop second becomes too large too high and/or misshapen set eights gives us four chances screw up cure mistake timing control inputs pilot waits until sees ship point tangency change directions Jle too late must learn initi ate change positively just before point will take little practice perfect proper entry loops initiated too soon result will modified lazy eight must avoided See C Figure II Several dividends above beyond better scores accrue proper entry tangent inter sections First line tension much better maneuvers kept below 500 sec ond because maneuvers will closer reference ground proper size becomes much easier keep really round next month Product note Ton Dixon back business providing quality products services Stunt fraternity Tom marketing plans service Bolly glass-fibre props line modified Fox engines exciting new line Merco engines has loaned new CL version Merco 60 evaluate Looks good outside Send SASE Tom Dixon 1938 Peachtree Rd Suite 401 Atlanta GA 30309 Ted Fancher 158 Flying Cloud Isle Foster City IA 94404 Envoy/Brickhaus Continued page 69 fuselage joints sure fillets flowed over edge plastic covering seals edge covering prevents fuel leakage porous balsa beneath Mask off wing stab brush slightly thinned coat Stuff r What happens famous STICK combined St Croix quality CANARD-PUSHER configuration Simply EASIEST-TO-BUILD BESTFLYING canard airplane available high qualify wood parts kit precision cut EASY TO ASSEM8LE withgreatinstructionsand plans youll canard flying lust few days Plus L thoroughly tested aerodynamic perfor mance assures airplane will easy fly LOADS OF FUN Fly bare bones have fun customiz make very own Star Wars ship Now can join CANARD REVOLU TION easy way.at price can afford -9 Tell dealer want experience fun canard flying Its easIest best avaIlable call 800-626-7042 toll free ORDER9 ONLY ST CROIX MODELS OX 279 FALLS WI 54552 Hobbypoxy Sand 240-grit paper smooth surface preparation further painting Mask off seal final primed area coat Rustoleum gloss clear Remask fuselage areas spray dusted-on layer Rustoleum gloss white heavier wet coat hour later finish bottom trim paint before work top surface allows get familiar masking tape charac teristics tack time paint am using top wing surfaces done next fuselage top takes three maskings black anti-glare panel done first canopy sprayed fuselage back done last Add name Envoy AMA numbers Now flaps elevators can glued place Bolt whichever landing gear will using make up lead-out ends Put enough weight wing tip weight box allow outer wing tip drop model held point spinner end center rudder Put balance point least ard point noted plans sure flaps elevators bind Have clean fuel new clean fuel filter englne solidly bolted place sure engine well broken-in before attempting fly Envoy fuel tank must firmly mounted fuselage use thickly-folded pieces foam keep tank place prevent vibration Tank vibration will cause fuel bubble send uneven mixture fuel air englne major source running problems Allow give some information type flight engine run enjoy prefer using set stage Envoy has 650 sq wing approximate trim weight 53 56 ox Lead-outs set according plans wing tip weight previously discussed englne Supertigre 46 stock venturi 161 dia spraybar system handle spacing equivalent stock EZ-Just small handle must adjust other handles different over hangs ie measuring center handle hand exit lead-out DIVISION OF BAR/RiCii SALES CO #2 FAIRWAY HANNIBAL MO 63401 3141 221-8803 aster FACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60SPARTAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15HIPERBIPE SE1JD450 per 5/8 ID Coupler or5OOperS/4 lDTo DANA AEROSPACE CORP 1110 E 5th St Box 41 Superior WI 54880 x 35 8s 4 $400 per blade $800 per pair PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOR HUB # 110 lable 6x 3 $400 per blade $800 per pair PROP HUB AflEMBLT# 111 For2540 engines electric motor equivalent 20 grams$20OO PROP BLADES FOR HUB # 111 lable 9 x 4 10 x 411 x 4 $500 per blade $1000 per pair Send SSAE tor catalog sheet complete line June1986 165 j PITCH 3 4 283 3* 4 56 3 3&3/4 4 5 6 8 4 56 6* 7 4 56 6* 7 7* 4 5 6 6W 6* 7 8W 6EW 4 6 7 7* 7* 7&3/4 8 6EW 6 7 4W 5 5W 6 5 6 5 6 56 6 7 8 FOUR-CYCLE TAILORED HELICAL PITCH 1266* 7 7* 8 136 7 7*8 1467718 1567 16678 PRICE $149 $179 $189 $1 99 $199 $209 $219 $229 $239 $239 $279 $359 $459 $659 $949 $299 $389 $489 $689 $989 PYLON RACING 7SN SIN 8&3/46* 6&3/4 7 7* 7&3/4 97 7* 7&3/4 W Wide blwle EW Extra wide $279 $289 $289 N Narrow ALL PRICES ARE POSTPAID ON ORDERS OVER $10 ORDERS SHIPPED FIRST CLASS MAIL WITHIN 24 HRS CALIFORNIA RESIDENTS ADD 6% TAX ADD $100 IF YOU WANT INSURED MAIL ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO COD VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES COMPLETE INVENTORY OF CUSTOM & STOCK PARTS HARD-TO-FIND ITEMS SUCH AS CUSTOM NEEDLE VALVES RACING WHEELS QUICK FILLS SOLID CONTROL LINES ETC SOCIETY OF ANTIQUE MODELERS MA TERIALS CARBON FIBER COILS CONDENSERS SILK TRANSISTOR IGNITION SYSTEMS TIMERS ETC REPLICA OR WICK ENGINES wire Lines 018 stranded cables 64 ft long measured eyelet eyelet have used plastic metal tanks As long set up uniflow muffler pressure have worked well needs Normally S oz fuel consumed full pattern usually complete around 10 12 laps after exiting cloverleaf Props use either Rev-Up 10-6EW Rev-Up 12-6 Release rpm about 8250 seen Royal tachometer needle will should hold very steady 8250 rpm mark RevUp 12-6 tach should bounce toward 8500 setting using 106EW Lap times should area 55 57 sec setup muffler shortened Du-Bro stack plate bolted exhaust end Four holes %-in dia drilled exhaust Harry Higley Big Tapper used muffler pressure tank Any change listed setup will effect change number laps lap time etc Suppose plane weighs 60 oz other specs remain listed Changes props venturis line lengths must made allow fly plane through pattern parameters have given used will offer some decent practice sessions modelers fly Stunt like have lap times prefer still gives goal shoot make changes suit particular situation and/or desires Some experiences racked engine run problems early part last years seasonto extent ruining two good engines possibly third ring/cylinder seal three have rebuilt broken inhopefully no long-term ill effects Changes tanks re-cleaning fuel lines needle valves using different props didnt solve problem What did matter re-introduction all-castor-oil fuel Tom Dixon Lex ington contest using club fuel contained half castor oil half synthetic oil lubricant excellent RC folks club engines operate higher rpm heat dissipated better load down Stunt engines perhaps heavier plane bigger props slower rpm heat build-up sig nificant all-castor-oil fuel seems cool engine better needs really nothing wrong synthetic lubricants fuel all-castor variety serves purposes better seems engine run good until horizontal eights square eights goes lean stays might suggest try all-castor-oil fuel such Carolina-Taffin ders 10% nitro PAC Precision Aero batics Castor decide yourself flew total five contests June Envoy engine run prob lems first St Louis second Paducah KY During prac tice flights prior Lexington contest still experiencing lean runs Tom Dixon gave atank fuel character engine changed com pletely next flight successful no over-lean problems Continued use fuel solved 95% lean runs last year Envoys first place Paducah spite inappropriate fuel used castor fuel allowed concentrate practicing pattern having worry whether engine would run correctly re-discovered all-castor fuel led three first places row Envoy Lexington Atlanta Rockford IL Sad say Envoy lost crash during last flight contest Rockford Winds gusting 25 mph gusts caught Envoy first loop cloverleaf slammed ground feet judges unfitting end short successful career Envoy new Envoy * SCALE DOCUMENTATION * SCALE DRAWINGSMODEL PLANS PHOTOS BOOKS EPLA-TECH 1986 INTERNATIONAL AIRPLANE CATALOG OVEN 100 PAGES48500 MCKENZIE HWY $300VIDA OREGON 9T488 THE DIFFERENT FOAM MODEL Lowest Cost Modeling 3 Send *100 latest fine-grain sheet foam 3 developments foam samples FREE foam sources Hard Shell finishes now lable Dozens easy build foam air plane plans Peanuts RIC lEEJ FOAM SCALE MODELS Box 662MA St Croix Falls WI 54024 166 Model Aviation JUH INVkNILJHY AVHAi OVER 8000 PROPSIII SPECIAL PRO SERIES DIA 6 7 8 8* 9 10 10 11 11 11* 12 13 14 15 16 Quiet Please PSSSST use muffler Its thinking today Lets tone down tar tender ears Thats what modelers say wasnt years ago noise accepted thing No seemed really bothered As gave art fling along came word decibel calories noise Shouting sound too obese must silence little joys So developed decibel eater strapped stack Now thats left mellow humm As muffler enjoys snack Lou Roberts PAW DIESELS Englands Finest 049 35 RIC STD Send $100 list Eric Clutton 913 Cedar Lane Tullahoma Tenn 37388 presently being constructed very few changes first certainly hope article Envoy will help some way increase interest activity Con trol Line Precision Aerobatics etched stone will making changes discover problems need solved Join PAMPA take few contests expert flier area Remember expert began novice flier Enjoy sport will find time activity will improve personal flying building expertise FF Indoor/Tenny Continued page 71 prop block consists YI6-in rubber foam exactly blade-shaped epoxied dummy blade made Vio-in balsa having required twist camber Both new blade blanks clamped inside mold form twist camber Prop assembly After finishes sanding tapering blade blanks Stan soaks warm water 30 minutes Three pieces Japanese tissue cut 7-in larger blades first tissue layer goes bottom half mold first blade placed tissue covered second piece tissue second blade laid covered third tissue Finally top mold foam rubber next tissue/blade sandwich strapped place rubberbands whole assembly baked oven about 175 0F result finished prop no raised grain Apparently tissue clamping prevent raised grain blades resulting water-soaking careful avoid damaging finished blades removing mold wire inserted spar slot can used separate blades block necessary blades can separated easily Stan thins glue retarder lacquer thin ner make slow-drying glue applies fine-tipped brush glues spar lAThES ING MACNINIS INE SHOP SUPPLIES Aoation Modeler MACHINERY AN) TOOLS INC Coil roll free 1-800872-6500RepreEHHtUtIeHS WV 1-502-3538Many MH1EHfHCIWHFS P0 Boo 530-V Horriceon WV 25520 Catalep $100 Over 200 PONHE SILICONE TUBING lOft28 ft50 ft SMALL 062 dl. $200 MED 1092 dI.I $400 SHOe $1600 LANGE 126 dl. $500 $1 125 02000 US $ CAN POSTPAID DOP6E diR 0 INC 10210 MannIng Ave N Shllwater MN 55082 SCALE DOCUMENTATION WORLDS LARGEST COLLECTION Color FOTO PAAKSKOKUFAN 3oiews 36000In 100k2000 20 04ev CATALOG 52005180 SASSSCALE MODEL AESEARCH SatOlaoIrOn418 E Oceantronl M GuareeteedNewport Beach Caltorera 9255 1 either tip root blade first applies glue top edge spar brush clamps blade place top mold until glue dry Prop spars Since spar must absorb rubber energy side must same stiffness keep prop correct align ment weak damaged spar will change blade geometry under load causing prop wobble Again wood spar half must match its mate both thickness den sity match strength us ing technique splicing two half-spars cut spar halves pairs side-by-side same sheet balsa Obviously raw spar halves must start same cross section Stan Chilton uses tapered guide sand ing block taper spars identical cross sections measured locations along blade final test needed assure equal strength two spar halves Spar testing Three photos show home made deflection-tester testing spar strength first photo trio shows raw spar ing tested deflection under load spar clamped left fixture adjustable scale set tip spar weight hung spar deflection noted second spar half compared first raw spars similar strength final match can made during sanding operation major dif ference point either balsa density varies sheet spars cut ac curately After sanding exact match spars spliced prop shaft tached remaining pair photos shows close-up details dolls miniature clothes pin clamp adjustable deflection scale Next time will detail spar assembly discuss lightweight props used micro film-covered models Also will some other prop tips before going other topics Down prop wobble Bud Tenny Box 545 Richardson TX 75080 Unfinished Business Back December 1985 issue author Bud Tenny commented aspects planning 1985 Nats Indoor schedule resulted dissatisfaction among some Indoor fliers lengthy editorial comment inserted Budes column point expressing point view differing Buds time Bud Tenny addressed letter editor wishing further explain thinking said inserted some editorial comment Indoor column December 1985 MA am con cemed some remarks will create basic misunderstanding nature Nats entry blank contractual nature entry blank highly beneficial both AMA con testant Having advance knowledge entry essential AMAs logistical support worlds largest complex modeling event Having advance knowledge event scheduling special conditions allows contestant plan own participation competition strategy comments mentioned fine-tuning resolve scheduling problems have officiated 15 Nats have seen fine-tuning action almost concept certainly new AMA does fine-tune given situation breaking June 1986 167 Name Street Address city StateZip