For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111
Edition: Model Aviation - 1980/04
Page Numbers: 44, 45, 46, 120, 121, 122
For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111
Edition: Model Aviation - 1980/04
Page Numbers: 44, 45, 46, 120, 121, 122
For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111
Edition: Model Aviation - 1980/04
Page Numbers: 44, 45, 46, 120, 121, 122
For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111
Edition: Model Aviation - 1980/04
Page Numbers: 44, 45, 46, 120, 121, 122
For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111
Edition: Model Aviation - 1980/04
Page Numbers: 44, 45, 46, 120, 121, 122
For starting snarling beasties good one- hand hold positions steadies crate flipping No mistaking prop pulled throughnote long follow-through Emphatic pull-through avoids bitten finger MOST construction articles start out ultimate modeL does everything better other Youve read before wont insult intelligence probably youre wondering What kind name FAWF combat plane should build name FAWF identifies First Airplane Flew test session includes six different airplanes Rich Brashers Rota tion Station arrived scene West Coast everything else suddenly outdated plans Rotation Station avail able soon discovered dedicated make fly right couldnt just build fly FAWF different story have built about 20 competitive right off board Consistency prime factor winning combat much having consistent-flying airplanes building same design time must pay attention certain details airplane must balanced same must very careful plane straight did best combat men opt foam airplane finds better machine ways dis sertation foam cut interesting readable weve yet en countered Combat fliers will dig rationale both design mater ialsand bits wisdom youwire less guys well Keeping mind have several times past three years have found myself airplanes just before contest built couple FAWFs brought home some trophies Unless have built foam models before construction techniques FAWF prob ably entirely new frequently claimed foam faster easier build Wrong Its whole new ballgame experienced builder beginner advantage foam combat will grab string pop knot off wood wont cut thing Before get step-by-step construction procedures lets discuss some different types combat airplanes now use chose article type plane Also Pd like pass along experiences different materials used build foam combat airplanes started building foam combat models because someone said could build two hours also said tapered wing models easy straight wing models Someone else said couldnt get warps foam wings ideas proved totally false kept telling myself must some reason build foam kept plugging away first efforts included original FAWF Flite Line kit two partially cored tapered44 Model Aviation wing models Flite Line kit flew pretty well didnt like way built two taper-wings warped turned extremely tight after straightening liked flop end lines FAWF well just flew super Through course next couple years changed almost everything about airplane Most things changed changed back least now know merits other methods biggest area experimentation cover ing started out using low-temperature heatshrink model covering Solarfilm EconoKote etc worked best everything have tried what am presently using next thing tried gift wrap paper used wallpaper paste adhesive finished off clear polyurethane varnish pretty cheap way go has following draw backs slightly heavier plastic somewhat brittle cracks leading edge foam panels join root rib would recommend method going build large number models very short life expectancy After tried tissue paper applied wall paper paste Dirty Dans favorite method thought plumb awful Its almost impos sible tear makes kinds ofwarps cant get out last material tried adhesive-backed decorator plastic available variety hard ware grocery stores brand have used Kwik Kover IL material probably way go cost important typically costs less $2 per roll roll will least two airplanes slightly heavier model coverings also very low-temperature material shrinks setting about number lower MonoKote iron does Solarfilm first thing consider building foam airplane cut foam Over past several years have seen types exotic devices detailed various model mags Most require two people operate Being too cheap too lazy build elaborate device having body help operate decided something simpler order drilled end workbench stuck piece o wire about 5 long drilled series s about 25 away first hole about t allows adjust tension hot wire stuck another piece o wire 5 long stretched piece 018 flying line between Presto table-mounted foam cutter Right now youre thinking must some big dumb dude pick up workbench torn upside down use foam cutter rm probably dumh quite big decided hold block foam pass over hot wire Cutting foam cutter basically like other cutter requires bit practice get perfect cores will go details below first few words about foam have read articles about various kinds foam say kind use onepound-per-cu-ft density expanded polystyrene hope correct have never able find anything else experiment brand use Zonolite seems avallable major cities doubt brand name has much signifi cance Try get 2-in thick sheets cant laminate thicker sheets can used necessary first step construction cutter cut two pieces o wire S long File grind notch about 1/32 deep around end piece about Now cut piece 018 flying line 30 long Cut two pieces aluminum brass tubing Use piece tubing tie end 018 line grooved end pieces o wire Use other piece tubing make up other end 018 line leaving loop just large enough slip over other piece o wire Now drill two s nearly through top workbench Drill holes angled slightly away other Insert two pieces o wire drilled holes string 018 flying line between may have move holes get proper tension cutter wire spacing correct piano wire stays slightly bent after cutter wire taken back off Except power supply one-man cutter now complete popular power supply seems heavy-duty electric train transformer what use have read about various other power sources including tapping various cells 12volt car battery havent contact Before can actually use cutter will need make various templates Since quality finished product depends largely quality templates make carefully Templates can made various materials three have tried ood aluminum Formica Plywood common modelers shop easiest work Aluminum probably best somewhat difficult make good templates using commonly available tools have jigsaw some sort Formica thing use Its easy cut using very fine blade leaves smooth surface wire slide over What ever material use templates sand edges smooth possible Plywood tem plates should waxed paraffin first templates make square templates cutting out blanks should 3 X 3 e -sq spruce Hot Stuffed side position will need two sets rib templates set cutting wing shape other set cutting spar notches coring After templates cut shape should stacked top another drill nail holes drill press possible Make sure nail holes exactly alrfoil center line After airfoil templates cut shape drilled will need glue short pieces 1/16 X 3/16 spruce extend tin leading edge 2 trailing edge pieces must centered aligned airfoil centerline exten sions guide wire enters leaves blank absolute must have tried make part template always ended up small notch would catch wire start cut thats left now before cutting foam some thing hold templates foam use 6penny box nails cut 1 long sharpened Two nails template should job first step cutting foam cores cutting blanks Using square templates cut several blanks 10 X 17-9/16 Plan scrap some foam before consistent perfection achieved Draw centerlines ends blanks Align airfoil templates centerlines ends blank secure place April 1980 45 now engine running author maintains same one-handed grip left tweaks needle just-so mixture right demonstrates traditional launch Note angle ship both hands have just lifted free nails last ready cut foam Hopefully got some kind feel hot set wire cutting blanks Wherever set temperature cutting blanks good place start Position foam blank extensions leading edge templates resting cutter wire Grasp foam blank corners thumb fingers form C around cutter wire Turn cutter immediately begin draw foam blank across cutter wire beginning trickiest part leading edge forms nearly right angle template extension wire tends stick corner Once moving continue smoothly evenly across templates until wire clear foam Turn off cutter Now examine cut have just made smooth consider yourself very lucky will have change rate speed move temperature wire both way determine temperature rate speed best practice few things look Gentle ripples usually mean wire hot enough moving too fast Notches mean wire too hot and/or may have rough spots templates Cores thin middle can caused too much heat moving wire too fast causing sag middle Trailing edges thin middle can caused holding piece foam being cut bottom Practice key good cores 3/8s 3/4 MAPLE NT MOUNTS 1/32 PLY SPAR SE PLATES 178 PLY DOUWER /4s 5/8 SPRUCE SPARS7 Now have part down pat its time cut spar notches Practice some bad cores first operation Secure tem plates already-cut cores Rest core cutter wire wire against front spar notches Turn cutter minimum heat will make cut Allow core fall its own weight cut front edge spar notch Allow wire dwell corner few seconds Slowly move core toward cut bottom spar notch reach back corner again allow wire dwell few seconds Now gently raise up core cut back side spar notch Repeat procedure other spar notch Check make sure spars fit snugly Continued page 120 4FOG 36 ENGINE LEADING FOGE CORING LINES VENT HOLE 7 K II/30Z BLADDER3/16 BALSA PLUGTIP WEIGHT ---ACCESS HOLE I/B PLY BELLCRANKREAR CORING PLATFORMLINES EN ER RB S I/2BALSA W H 6 ONBOTHAjII S DES 3/32 BRASS TUBING LEADOJT GUIDES G/52MUSIC WIRE PLISHROD TAIL BOOM IS I/2BALSA WITH 1/16 PLYWOOD ON BOTH SIDES __LI 36 BALSA WNGTPS I/B BRASS TUBING FOR BUSHING 3/3DMUSIC WIRE HINGE PIN I/B PLY DOUBLERS r 1/4 BALSA ELEVATOR-- BALANCE 2/4 BEHIND LEADING EDGE I/B PLY GOBLER LARGE BELLORANKLARGE CONTROL HORN 1/4 BALSA /16 PLY 6VER 1/2 BALSA I25455 /4s3/B SPRUCE SPAR CORED AREAS - ffihzz7- FOAM CUTTING TEMPLATE 1/16 PY ON BOTH SDES 1/2 BALSA CENTER RIB FAWF STYROFOAM AMA COMBAT MODEL DESIGNED & DRAWN BY GENE PAPE DRAWN BY OE DEMARCO FULL SIZE PLANS AVAILABLE SEE PAGE 128 46 Model Aviation Since quick construction away life combat fliers follows Genes one- men foam cutter would ingeniously simple eli Gene cutting blanknote guides hold accurately positior hands foreground pulling itthrough Right Howthe foam blank drawn across cutting wire hand forming 6 corners text deals comprehenaively fine points technique SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS NEW. SIMITAR SPORT 19 - 40 Power 50 Inch Span Standard Kit Includes Ply Wing Sheeting Foam Cores Balsa Fuselage Gear Formed Sliding Tray Full Site Plans $5995 SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS 6 High Quality 1000 Cutton $ ulti-color Silkscreen Sites SML&XL Eleck Rider Yellow Plus $100 Astron Light Blue Shipping Simitar 540 Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS AIR/CRAFT 20825/ ROSCOE BLVD CANOGA PARK CA 91306/ TEL 213 344-6391 OR 709-0894 lum thrown back thus giving down elevator sending pride joy ground suppose super careful let model fly out hands could get away doubt since modelers see hand-launch tend throw model last moment must make sure no binding binges ailerons elevators move very freely have used system consider both easy install absolutely free binding use small cotter pins obtained hardware store insert wing aileron spar spreading out back side through small piece light plywood have small heads pro truding spar same ailerons themselves ailerons put wing cotter pin heads next other remains done take long thin wire run through aligned holes bend over end wire protrudes wing tip elevator tip fasten piece Scotch tape thus making easily removable necessary have never bind binge wire fail out using system Also next invisible both systems elevator aileron notice stops put restrict movement pendulum use can see pictures balsa blocks movement required can just slice off piece block conversely glue another piece restrict further As bearings tubing used bearings connecting wire passes through wing ribs fuselage formers prefer put large holes respective parts making sure wire does touch anything between pendulum bellcrank elevator horn another reason recommend using heavy wire between points use bearings must make sure direct line ifjust out line will tend bind up entire system hence use lazy method use large holes previously mentioned Besides can kid myself thinking Im following advice famous designer Bill Stout axiom Simplicate add lightness must concede sound advice scale modelers that fear dive would actuate pendulums increase hazard answer let say aircraft steep dive already have hands full model clearly out trim case ailerons will still operate bring wing up least try keep spiral dive -developing model dive effect trying run away pendulums would tend keep neutral until wing dropped whereon would operate picking up wing however would have no effect dive would still have crash hands word installation loosely use word horizontally mounted pendulum can see Figs 4 & 5 pendulum hanging least 150 200 down its pivot can accommodate glide angle glide steeper youre trouble own angle necessarily restricted mount pendulum wing depth ribs themselves large models such Bellanca should pose no problem does simply use Jacks system mount fuselage ample room word caution sure use heavy enough wire parts mechanical system itself say use heavy wire connecting piece pendulum bellcrank lot pressure exerted between pendulum aileron try save weight effect adding weight uselessly light small connecting wire will work ftne tilt hand under flight loads will flex bend rather operate aileron Heavy wire should also used pendulum itself permit carry weight also prevent flexing under load bellcrank should also sturdily made made mistake using clear plastic first ones replace broke under slightest impact Access panels over cranks proved extremely valuable time allowing small openings wing easy replacement parts sure no slop system just little first bearing smidge rod connecting crank etc keeps multiplying until whole system rendered next useless play elevator systems use RC-type clevis allows adjust amount up down elevator really works great allowing crank amount elevator needed flying ROG pendulum elevators almost mandatory ROG since running launching hand pendu FAWF/Pape Continued page 46 notches problem have run procedure having notches much deeper center ends caused having wire too hot time now poke holes through wing panels can pass cutter wire through core out need piece o wire propane torch heatthe end red hot something guide simple way make guide drill 5/32 hole lengthwise through 1-in-long piece of2 X2 1 side Insert 1-ia-long piece 5/32 o d brass tubing hole Hot Stuff place Check see o wire sticking out 18 guide end still about 1 off table Mount wing panel pieces cut off first cut out should wing centerline 1 above table Carve shim necessary Now end sticking out about 2 guide heat end red hot Moving quickly set guide table slide up end core wire entering core center part cored 120 Model Aviation SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR SI MI TAR Rosies D&R Power Pod Fits COX T- D & Med 049 -051 Engs Rubber Band Screw Mounting Eng mtS upright inverted Running time appx 4 mm Nylon injection mouldedColors Power 3 lb all-planes total weight I4 OL$595RED BLACK WEYELLOW ALSOORANGE MAKE BANTAM ServosWrite D&R SticksFor Free ConnectorsCatalog Bulkhead SwitchFine Products mounts TX Sjfety Switch 1-jeavy duty gear Weld de i*esing 1ff 18 Rand aiim line preduisa 3501-C W Moore St Santa Ana CA 92704NEW 1/2-A Witch Hawk 111979 Nats Winner Wing Area~d Record Setter CONTEST WINNERS 1/2-A Country Boy Wing Area 275 1/2-A OKIE BIRD 1979 FF Champs Winner 3 Times Nats Winner EACH KIT $1400 Add 10% postage Postage paid two kits Ciemcraft P 0 Box 524 Sand Springs OK 74063 leading edge Slowly push wire rest way through wing paneL may have stop reheat wire middle pass have trouble wire wandering probably because trying push through too fast Repeat procedure time puttingthe hole about front rear cored area now ready core wing panels Remove end cutter wire its post pass through front hole wing panel templates must place time hook back up Turn cutter pull wing panel straight toward Use same temperature used cut out panels feel wire make contact both templates carefully feed wing panel around hole template Stop feel cutter come free gets starting point Turn cutter off Take wire loose post pull out wing core should come Take care coring twist wing paneL can cause cutter come out through surface panet Now front cored out put wire through hole rear core hook up Turn cutter allow wing fall its own weight until wire contacts both templates Run around rear core front should now have good wing panet have two good ones ifs time read some experimentation methods can used cut tapered wing panels say benefit stunt RC fliers may reading combat fliers tapered wings open up whole new can worms can end up flying better part extra performance worth tile investment Now easy part wood Start laminating 1/16 plywood both sides sheet medium hard a plan build model cuta6 X 12 sheet plywood half glue piece X 12 balsa Use contact cement Cut center rib tail boom arent parts might well cut rest out youre engine mount doubler hellcrank mount elevator bearing doublers cut wood tips 3/16 medium C-grain balsa motor mounts s X e spar webs 1/32 plywood elevator C-grain balsa use Sig 1/4 X 3 taper-cut sheet because half carving already done sub-assemblies next Epoxy bellcrank mount through center rib Shape elevator bearing doublers glue tail boom Epoxy motor mounts ply wood doubler drying make up control system Note really works better have pushrod pass under bellcrank makes pushrod exit wing nearer trailing edge helps reduce pushrod flex outside maneuvers Make up round balsa plug scrap 3/16 balsa glue place about 6 root end leading edge cored hole out board wing paneL becomes bladder tube Mount bellcrank assembly bellcrank mount Use dummy pushrod time long enough reach trailing edge Hold inboard panel up center rib mark pushrod will pass through wing Use razor saw cut slot pushrod about wing paneL Assemble inboard wing panel center rib check clearance necessary carve foam required clearance everything else clears align pushrod will controls hooked up Heat end piece brass tubing red hot slide down over pushrod bellcrank will give clean pushrod hole wing Disassemble mount pushrod intend use flying Coat surfaces center rib wing panels water-based contact cement will join together set aside dry dont have much experience waterbased contact cement Goldbergs Glue Goo works welt setting will need make alignment jig putting pieces together made finding two pieces cut outside wing panels same thickness front back Line up side side flat table have jig Once contact cement has set carefully assemble inboard wing panel center rib very careful alignment must right first time wont get second chance Lay inboard panel center rib attached outboard panel jig Now just slide together Once outboard panel contacts center rib basic wing complete Assemble spars wing glue Use razor saw make slots 1/32 plywood spar tie plates Glue spars tie plates place white glue Titebond Sight down leading trailing edges make sure wing straight Mark leadout hole locations inboard wing tip drill holes through tip 3/32 o d brass tubing leadout guides Round inboard tip leadouts will come outyou wont able after leadouts place Thread leadouts through inboard tip glue place five-minute epoxy Pins used hold place epoxy sets Epoxy outboard tip place Slip leadout guides holes couple drops Hot Stuff will hold place Epoxy -oz tip weight outboard tip Finish leadout ends After glue has dried thoroughly spars sand wing over Trim trailing edge end center rib Cover wing using previously-discussed materials After covering cut notch engine very sharp knife Cover bare foam area scrap plastic covering Shape elevator cover plastic covering Shape tail boom cover plastic covering Drill hole s tubing hinge bearing very careful get hole straight Push brass tubing through tail boom secure Hot Stuff Finish rest hinge same way other combat modet Remove covering center rib tail goes epoxy tail assembly wing dry mount horn finish control assembly Cut motor mount assembly shape Cut covering away center rib motor mount goes Install motor mount tem porarily Put engine plan use complete prop place motor mount check balance point holding rubber bands Slide motor back forth until plane balances properly Mark motor mount hole locations Remove motor mount drill engine mounting holes Epoxy motor April 1980 121 EU 330EU WV PROPS FOR BIGGIES Now can experience full thrust potential chain saw engine prop-drive new durable efficient glass-filled nylon pY NATNrati props Platt Seen QSAA Fun Flys Louisville Las Vegas Look us up WRAMS TOLEDO Direct Factory Introductory Prices New items biggies coming DYNAHUB easist safest way start big engines DYNATI-IRUST Prop Balancer Accurate Easy-to-use & inespensive Add 50 PER PROP shipping USA pay shipping charges orders 6 s Send CHECK MO VISA MC COD mounts place Cut holes bladder tube fuelproof its interior pouring about two ounces thinned white glue sloshing around pouring out excess Fuel-proof motor mount slow-curing epoxy glue last step before engine mounting check warps also im portant steps position full soft drink can four corners wing flat surface Put straight pins tip leading edge trailing edge four pins rest cans wing straight now time mount engine go flying yours fly good hope dont meet contest CL Scale/Gretz Continued page 47 fourth control line first Zlin Akrobat used standard G-S 3-line bellcrank system throttle control An inverted style bellcrank mounted fuselage solid music wire pushrod going Fox Eagle carburetor Rhom Air retract system am familiar IN STOCK NOW 186 188 208 2010 $700 700 900 900 COMING EARLY 1980 156$500 16550 166500 Dynathrust Props Inc 2541 NE 11th Court Pompano Beach FL 33062 Raymond Colelli 305 941 9119 having used since 1973 has 4-way switching valve actuate up down movements landing gears presume other pneumatic systems have similar valve valve basically junction box systems up down pressure air hoses valve has grooved sliding barrel inside routes pressurized air appropriate up down hose end barrels travel RC applications standard servo drives inner barrel end valve other Zlin use throttle pushrod same job As can see accompanying drawing spur wire wrapped soldered throttle pushrod spur wire two wheel collars small enough slide valve push barrel valve body itself securely fastened fuselage structure throttle pushrod moves forward open carburetor number 2 collar pushes barrel front valve thus connecting up air hose pressure hose bringing landing gear up Conversely throttle pushrod closes carb number 1 collar pushes barrel rear valve completes down circuit lowers landing gear use wheel collars spur wire makes exact timing retraction ex tension gears adjustable within power range engine number 2 collar adjusted gears came up absolute full high throttle Obviously makes necessary take offwith just slightly less full power avoid prematurely retracting gear ground doesnt present problem model adequately powered number 1 collar adjusted gear came down throttled back about /s-/z power setting Im sure sort actuating arrangement would work equally well model size wing loading range Zlin years flew particular model including two Nationals never reason wish could operate retracts independently throttle fact might consider using extra pneumatic air cylinder operate flaps tailhook etc conjunction retracts throttle could simply plug extra cylinder retract system same way done retractable tailwheel nose gear Mike Gretz Box 162 Montezuma IA 501 71 CL Aerobatics/Paul Con finued page 48 ears Lastly Bob said engine offset called plans might try some shims under front engine see helps line tension might also have move leadouts back forward change amount line tension Most profile kits built leadouts position Bob may have move around see helps summary good order trouble shooting case would 1 wing alignment including flaps also see stabilizer matched up line wing 2 wind direction 3 tip weight 4 engine Bob might want try entirely different engine same make another make see original just plain worn out 5 engine offset 6 leadout variation Sam Howard Quebec Canada wrote asking about banded crankshaft ST 46 Some RC friends told him imperative remove Actually have heard instance band coming loose subscribe Murphys Law would probably want remove However since operating stunt engines 7000 9500 rpm range less chance band coming loose RC fraternity usually run engines top end rpm range 15000 17000 Some people feel keeping band adds little bit crankcase packing helps performance Now time planning contest next summer use P AM P categories has become quite widespread area contest has started using method should promote P M P categories 1 Expert average AMA score 500 over 2 Advanced average score 400 499 3 Intermediate average score 300 399 4 Beginner average score under 300 Most fliers should have idea what average score dont can make educated guess after first round flying can change categories need areas stunt turnout large contest administrators have combined two classes based 122 Model Aviation IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus parts Jim Messers ERCOUPE KIT- $19500* Concepts BIG FLEET KIT-$17995* Barkleys TIGER MOTH KIT- $24995* *includes FREE Du-Bro Wheels /4-SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $2495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sizes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENGINESfor Fleet- $3000 COVERITE 15 rolls- 20% off 24-Hour Service. Add $200 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 196 Valley View DrAllegany NY 14706 Heres equipment yeu need give props toe very Sent balance--balance directions Carefully crafted free top grade materials BUBBLE BALANCER accomodates 3/161/49/32 prop holes Other sizes available special order Dealers invited $1495 Add $150 HOWARD B HUEBL SEPT 005 postage handling iz Mion add 4% sales tan No CODs Boo 193 Reule 4 Mankato Mn 5011111