WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536
Edition: Model Aviation - 1989/04
Page Numbers: 71, 72, 73, 74, 168, 174, 175
WHEN THE DESIRE Sport Scale Flight planes take up modControl Line model surfaced few months eling time would simplified Scale ago decided would nice change subject same time designed pace usual stick-and-tissue Free just go around circle Thoughts about project began jell equipment materials accumulate large file someday Im going too Scale three-views photos Top Finished automotive spray paints light gray black enamel white lacquer rudder Al H simple comes out looking very realistIc coat clear spray epoxy protects colors fuel Above left first time out shop author Al H ended up unexpected contest Upon arriving field discovered contest progress decided fly Sport Scale event being able get engine run slow enough touch-and-goes taxiing cost Al extra points options trophy model received positive comments Above right Sigs 4-In star-and-bar insignia turned out easiest part finish really complete look text describes easy way duplicate black letters numbers make own stick-on decals April 1989 71 Left Our author chose RC version OS 15 engine power model Temporarily mount engine determine exactly cowl blocks should placed Right Tapering fuselage doubler will give model nicer appearance later finish applied Left The stab elevator joined plastic strip hinges pinned place toothpicks control horn shown Sig RC-type leaf hinges could also used free-moving controls Right fuselage plank engine mount sticks right side doubler already epoxied place left side doubler about coated epoxy preparation lamInating onto fuselage plank just waiting raided time rummaged through pile some photos Id taken AtH Skyraider rose top Obviously was ready build because photos clipped Douglas Aircraft three-view copy Profile Publication #60 enough data hand begin keeping sport plane AtH designed profile model enough detail usual necessary model elements wouldnt overly detract scale effects end product shows convention al Scale outlines dihedral landing gear type wing excess width elevator skinny body ing giveaway nonscale features chose authentic markings worked up simplified method duplicating resulting model quite satisfying looks well flying abilities Already its drawn two interesting comments other modelers fellow said doesnt fly like 15 looks acts like much larger model Hes right model flies fairly fast good speed range stays out lines very well other com ment Skyraider doesnt look like profile air Credit thought probably goes cowling definitely sets Al H apart pure profile-bodied models AD series Douglas Skyraiders have fascinating airplanes start Quite few variations have built interesting-looking planes hard workers Design efforts AD itially designated XB2D-1 Dauntless II began 1944 Its first flight made April 1945 548 aircraft dered shortly afterward Very early its life name changed Skyraider Navys new designation system changed BT2D-l AD-l plane signed variety roles continued evolve up through AD-7 version AD Skyraiders flew Korea Vietnam con firming expected performance Because went through permuta tions model project Sport Scale AD can finished number waysin silver XBT2D-l silver 1in spinner #4 BT2D-1 navy blue white markings AD-6 light gray A1H designation changed AD-6 A1H along color change 1960 prototype AlH gray mostly because would fairly easy make up black markings based old photos Much Id like suppose its possi ble wont build planes repre sented someday file AlH photos must admit taken 1965 Construction body AlH based plank -in sheet balsa Before doing cutting engine mounts determine what size will bea suitable range 15 25 cu check engine mount size required OS Max 15 fits 1-in spacing shown plan yours may require moving mounts farther apart Cut two doublers A6 ply De pending depth engines crank case left-side piece may need cut 72 Model Aviation out clearance between mount sticks Taper rear edge doubler rasp sandpaper nicer finish later mount sticks place epoxy doublers body Cut out clearance space bellcrank its platform Blind nuts work well mounting bellcrank should installed point Drill engine mounting holes fit blind nuts cowling cowl strictly decorative does look nice worth bit ex tra work Begin roughing out cowl two blocks add A-in sheet right-side block increase its width A-in sheet ring Quite bit right-side block will need removed clear engine throttle needle valve fuel line muffler suggested method cut engine clearance holes first hollow block out enough fit over throttle crankcase carve exterior shape cowl pieces permanently attached fuselage after enough clearance has created allow installation re moval engine through openings plan shows cowling somewhat offset compromise shape neces sitated profile body pro pellers center lies surface flat body offset isnt obvious com pleted model because ones eyes dis tracted paint markings engine muffler removed allow access engine mounting screws rein stalled use muffler highiy rec ommendedit might make difference keeping gaining flying site Exciting though sound unmuffled model en gine may Ive discovered using muffler takes away some flight line jit ters Thats personal observation Ive never seen print anywhere else thats worth considering Wing Begin cutting out ribs Ply wood ribs used help share load wing-mounted landing gear LG Notch rib fit over LG mount blocks Al chose J Roberts 3-line unit mod OH As shown its already mounted ply platform Its easier drill mount ing holes fit blind nuts plat form first epoxy inside fuselage make painting easier use hook made coat hanger Fasten engine mount hang model up can conveniently sprayed allowed dry save some sanding later lead ing edge LE trailing edge TE strips can tapered now before pinned down spars must tapered will fit wing out toward tip Use Wi rib jig set center ribs slight angle Ultimately ribs will lie adjacent body completed wing ready install Add small piece LG mounting gear stock Wl rib create strong anchoring point wire LG Use %2 drill bit connect grooves pieces Fit ribs care fully LE TE ends ensure strong glue joints Glue flap aileron pieces together sandwich carve 1A x 2in sheet taper cutting mate rial thickest edges Cut apart flap aileron piecesGlue aileron por tions TE tack glue flaps place Add tips upper spar Use Wl rib jig again gauge LE TE spars must sanded wing panels joined dihedral Cut out ply spar joiners being sure make slightly different shown since April 1989 73 cutouts bottom fuselage designed fit slot wing mate its interior result very strong center section overall very rugged model Wing construction quite conventIonal two halves being joined ply wood spar joiner Use epoxy strength allow yourself time get everythIng aligned wings taper thickness Join wing panels either air pinned down board tips blocked up using whichever strategy seems easier method block tips board glue panels together re move wing board allow fit ting joiners handful clothespins will help clamp joiners place Add wing sheeting sanding bot tom center section flat will blend fuselage Join fuselage wing may have thin fuselage bit open up wings center slot allow things fit gether becomes very strong joint especially epoxy used Doublecheck alignment before epoxy sets up Landing gear stabilizer elevators Make up landing gear wires fit glue %-m-sq filler pieces ends grooves Make LG doors will held LG some small wood screws through brass clips drop Hot Stuff holes will make stronger threads balsa Bend tail wheel wire its folded-over top end Anchor wire epoxy-filled hole fuselage Cut out stab elevators cut down bend horn shown Sand pieces shape add hingeseither plastic RC variety cloth over/under type model has plastic strip elevator hinges fairly stiff dont al low very free controls traditional Con trol Line flying plastic Klett type pinned hinges would produce flexible controls still good idea Control Line models Flaps bellcrank controls Cut flaps away fit Du-Bro aileron horn homemade equivalent rightside flap Fit other flap hinges well dont glue time being Due dihedral wing taper left flap needs flexible link right Bend link wire glue place flush lower surface flap Make socket left flap necessary because link wire needs move bit fore aft piece flattened tubing parts place link wire can bent needed make flap positions identical side still working wing add about oz weight right tip help maintain line tension Mount bellcrank begin making controls Make flap/throttle rod first since its little harder get Two pieces threaded-at-the-end rod used throttle flaps third piece plain rod hooks throt tle hole bellcrank Bend three pieces close approximation fi nal shape join together wrapped copper wire piece 3A6-in brass tub ing solder clevis end allows some adjustment length Bend rod bellcrank needed free max imum movement Make elevator pushrod Since threaded-end rods quite stiff guide rod isnt necessary Attach both rods bellcrank soldered washers Wash ers small enough hole can made punching through scrap brass tin can stock awl Trim pieces round snips files Its advisable get flaps eleva tors working well before model cov ered painted Hinges should fitted place although might find convenient avoid gluing flap hinges until after covering painting done Covering painting finishing Use favorite method follow method Continued page 168 74 Model Aviation fuel tank mounted original model brass strap two screws course traditional hook rubberband arrangement could used equally well Skyralder takes shape bare wood cowling landing gear doors simple Include add realistic touches normally seen profile model m ZAP UNIVEHEITY COLLEGE OF GLUE KNOWLEDGE DUAL STRUT NICKEL PLATED NOSE GEAR chased club Percy Pierce Philadelphia divided among mem bers black pure para A2 thick came A-in -in widths Talc usual lubricant although some members used liquid soap Motors made up S-hook end held shape rubberbands hooks also covered small rubber tubing Thus motor could easily used inter changed flying field general models flying sticks exposed motors common type twin pusher oc casionally twin tractor single tractor Good flying models rubber en closed fuselage appear until late 1920s 10 years later Ambroid glue generally used joints bound fine silk thread Almost component model built 1914 made builder Besides rubber material locally avail able goldbeaters skin like doped white tissue purchased supply houses East other materi als could found right Milwaukee Tis sue used lens tissue drugstore Piano wire sold hardware stores Wood shops sawed sticks prop blanks pine basswood bamboo blind curtain store provided fine bamboo splitting needed Lynn often pur chased group supplies other mem bers provided lot own well As time went member stacks models parts often interchanged Building flying con tinual process model bit advanced lighter weight cleaner de sign Flight matter launching wind letting model take its own directionsome natural circle others went straight line Glide never prime factor duration Since original aim distance straight flight desired Besides twin pushers excelled club possibly advanced country design flying single tractors Contrary some contemporary writings Milwaukee trac tor smooth-flying model good transition power flight glide flew slowly builder could trot alongside model gently glided land ing Generally wheels floats fitted models ROG ROW flying Hand-launched models no landing gear twin tractor wheels held Ervin Eiring can seen photo Milwaukee Model Airplane Club enterprising forerunner todays clubs Next month will wrap up tory early innovative group SAFE FLYING IS NO ACCIDENT used prototype shown pho tos choice finish driven three factors First color selection gray isnt commonly found dope epoxy Second wanted finish easy duplicate Third decided decorate model painted-on stuck-on markings end need protect mark ings fuel became decisive factor Clear spray-on epoxy shielded markings opened door sorts possi bilities dope paint fuel-proof Searching light gray disclosed Dove Gray used 1979 Fords available acrylic lacquer touch-up spray cans auto parts store Two coats clear nitrate dope ap plied whole model covered wet silkspan tissue After dry ing two coats nitrate clear ap plied small amount powder/dope fill er about two tablespoons talc four ounces clear dope applied plane sanded thoroughly few extra coats filler applied wherever silkspan overlapped After additional sand ing Dove Gray spray applied Youll need devise some type hanger Continued page 174 old timer perfectly pwportioned modeling Curtiss Robin 049 EngInes -Channel RIC 41 Wingspan Electric Power Optional 01 #103 Very few full scale aircraft ideally suited model flight rs appealing old Curtiss Robin horn spruce linen age beautifully proportioned rubber electric glow aegines Easy tun build traIner-lIke performance Flyline Models Catalog 506Phuna 7031 273-9503 4 FLYLINE MODELS INC Fairfax VirgInia 22031 USA 168 Model Aviation Skyraider/Lidberg Continued page 74 Revised Lightweight Dual Spoiler ModuleV dual spoilers made rigid PVC weigh 3 oz per set closed position total ovesul height hes modlflel2leto 1 Inch unmodified blades fully attended total overall height 2% Inches modules accuate dierimaly smooth emily single module 5fl6 inches thick byfl Inches long Modules can ganged and-to-end longer Incressed surface aro Only *14J6 per set Ask local hobby shop today DsrsadcAC R/C Inc details ALTEC PRODUCTS INC 18800 St 47E Stdne OH 45365 EIi 513498-1721 GATOR RIC PRODUCTS TIGER TAIL 4S DELUX ALL BALSA KIT An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing off balsa kit machined wood parts complete hardware package includes plug-in $djustable stab parts new wing mounts Wing Span -72 inWing Ara 860 sq Complete Delux KitSI 5995 TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Black leather grain aluminum trim Irking clasp S 1995 MV-i TYPHOON New F3A competition Big beautiful flyer balsa construction plug-in wings 120 four stroke 60 two stroke power Plans-two sheetsSI 495 Fiberglass cowlSI 895 Clear butyrate canopy. 5 995 OTHER PLANS Tiger rail 4S-two sheets 120 four strokes51495 TAR baby 120 four strokesS 1195 Alley Kat 40 size trainer sport5 895 Gator Flea 40 size sport5 895 Bobcat 40 size sportS 895 GATOR SOFT MOUNTS COMPLETE SOFT MOUNTS QNCLUDES ALL HARDWARE Optimized lowest vibration transmission airframe minimizing engine shake Available VS-60 OS-6051495 SOFT MOUNT COMPONENTS 4-lug Mounting Plate 606 I-T-6 black anodized Undrilled. SS95 Drilled YS-6005-60. S695 Rubber Iso-Mounts SIB diameter x f2 long 8-32 female end 8-32 x 112 male other end Specify soft 50 durometeryellow firm 60 durometer-purplci Each. 53OOPkg 4S995 feather Ilte glass cloth 7 ozsq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions 5895 Include $2 SOiltem UPS esidents Add 6% Sales Tax GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 76-8639 use during painting processthe plane painted single color land ing gear rule can serve hook isnt yet attached suggest bending coat hanger wire hooking hanger securely under couple engine mount bolts can bang plane stepladder clothesline paint create markings isnt necessary follow somewhat tedious method adopted considerably easier procedure can also used prototype masked block letter/numbers using artists frisket sprayed black enamel smaller letters used Leroy lettering dia ink clear sticky decal material Peck Polymers cut out stuck Sigs 4-in star-and-bar insignia also utilized An easier approach make Xerox copy letter desired cut arrange 8 x 11-in piece paper hold ing Scotch tape rubber cement take blueprint shop Ask clerk Xerox markings onto sticky-back ma terial can cut apart used like sticky-back decal will cost about $1 per sheet antiglare panel rear faces cowls step panels masked paint ed black Silver white light blue can used canopy rudder should white few lines representing panels hinges trim tabs cowl flaps etc signifi cantly enhance scale appearance Use drafting pen-and-ink marker meant writing film plastic usually la beled permanent Let everything dry about four days apply two coats Black Baron clear spray epoxy mate rial will withstand up about 15% nitro fuels after aging week Final assembly Once epoxy dry fit LG its doors straps screws taching wheels soldered washers wheel collars Add bellcrank pushrods make solid wire lead-outs elevators neutral throttle high-speed position throttle lead-out made up 3% longer elevator lead-outs Add engine muffler Attach fuel tank silicone glue rubberbands brass strap wood screws muf fler has pressure fitting run line lower vent tank Remove line muffler end overflow filling tank reattach Cap top vent plugged folded-over piece fuel linea very neat arrangement does away fuel dripping out vents over plane As shown plan A1H can bal ance over considerable range still flyable balance point far forward plane will highly stable fairly slow respond control changes As balance point moved rearward model becomes sensitive prototype bal ances just behind leading edge wing fuselage tank empty Its nice plane fly since its very stable doesnt require constant elevator correc tions also glides well engine off heavier engine would wise add some weight tail bring balance point least wings leading edge Some serious fliers have fact ad vised balancing farther back makes better slow-speed flight Once youve achieved desired balance point dry run home model hooking up flying lines handle Make sure throttle flaps move cor rectly response commands third line Flying Bear mind A1H taildragger sure maintain up elevator keep plane nosing over its re leased takeoff especially grass Have helper hold model first few flights release high-speed flaps-up position As learn about plane may want try taxiing around low speed opening throttle take off Set throttle speed sufficiently low allow touch-and-go maneuvers landing under power taxiing taking off again linked throttle flaps un usual arrangementnot by-the-book Scale bit orthodox latch-type flaps used Carrier models prefer monthly publication covering International RC Soaring Scene US $17 yr 21/yr 1st Class Canada/MexIco $22/yr US funds Asia & Pacific S28Iyr US funds Europe UK $28/yr US funds Surface Mail Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Poyson AZ 85547 174 Model Aviation SOFT MOUNT THE EASY WAY WITH VIBRA-DAMPTM B EA1AS patent pending use up 60 in3 2cycles Laboratory tested contest proven 21 50 plus $175 shipping Mich residenls add tax ALL HARDWARE INCLUDED UNIVERSAL engine isolation mounting system PER FORMA NCE PRODUCTS UNLIMITED 7093 E Dodge Rd Mt Morris MI 48458 313 631-4894 FoR DerAiLs & BRocHur4e OF OTHER HIGH TECH Pooucrx SEND $1 00 Carrier-type flaps hook can easily adapted after model completed due profile construction Other possibilities flap configura tion can also explored such sliding link flaps arrangement flaps would pulled lowered posi tion spring sliding link would set raise during last thirdor throttle rod travel Takeoffs could made nearly full power flaps down full-scale flight After takeoff last bit throffle move ment can raise flaps high-speed flight Model projects such often re quire some assistance thanks go old flying buddy John Patton technical help dedicated efforts Sport Scale model Control Line answers present needs A1H wont disappoint Its durable plane should bring hours flying pleasure Hardware etc Used AtH items available well-equipped hobby shop Sig 0S Max 15 throttle muffler 8-4 Master Airscrew prop Engines tween 15 25 suitable Perfect #21 short Senior wedge tank 1 oz capacity x 025-in brass strip K&S plus screws tank mount 4-40 engine bellcrank mounting bolts blind nuts need six J Roberts standard upright plane control unit handle Can use LR products essentially similar Du-Bro strip aileron horn connectors Sig 4-in horn Goldberg Klett hinges need seven Threaded pushrods least 24-in size two 6-in size Nylon small clevis need three Perfect 2-in wheels Y4-in 1-in tail wheel Sig landing gear mounts /I6 x % need two Sig landing gear straps Flying lines 015 stranded wire three 52ft lines / IVE 6 Plasticote Car Color touch-up spray 1979 Ford Dove Gray stock #FM 8084 available Pep Boys need two 6-ozsize cans Other brands sources prob ably OK contents marked acrylic lacquer Balsa etc noted plan SAM SOCIETY OF ANTIQUE MODELERS GET IN ON THE FUN OF FLYING OLD TIMERS FREE FLIGHT AND RC BOB DODDS 209 SUMMERSIDE LN ENCINITAS CA 92024 ISSUES OF SAM SPEAKS Hot Stuff Super T joints Epoxy glue specified joints Black Baron clear spray need can Nitrate dope need about pint responding advertisers mention read about ModelAvlatlan MEMBERSHIP $1000 YEAR April 1989 175 $975AVAILABLE AT AMERICAS8525 FINEST HOBBY SHOPS DISTRIBUTED BY ZNUWDWRZZD 7590 Sao Gobriel Rood oodero CA 93422 490-1717 ZAP UNIVERSITY COLLEGE OF GLUE KNOWLEDGE naay-oo-ry p, caIn nano UraTe St Mays PA 1S7 34-2536