Twin pushers design day back early 1900s time putting flights mostly power above twominute mark author prepares launch replica 1912 Wallace Lauder model plane went win 1915 Nats ITS SPECIAL challenge source great satisfaction build replica model plane same materials used pre-balsa era 1907-1927 origi nal plans such airplanes published long ago various magazines can found larger libraries today Usually magazines bound volumes dividual pages can photocopied leaving modeler produce full-sized line drawing over model can built list of magazines found end article Some tractor models pulled prop props can found major ity good fliers twin pusher variety came sizes shapes ranged crude highly re fined Scale models era may built rule possess poor flying ability rarely true-to-scale also Indoor tractors first built about 1920 members Illinois MAC Club construction pine duration about 60 sec 1921 using bamboo-and-balsa con struction superfine silk tissue cover ing some refined technique material selection get minimum weight Bert Pond managed flight 2 mm 50 sec Bert still has model subject model well-designed twin pusher Wallace Lauder Carl Goldberg day October 20 1912 Lauders model won HandLaunched Duration contest Murray Hill NJ flight 223 achieved eight consecutive flights over 210 same day After flying replica conjecture flights mostly power little glide time finest modelers day Lauder went turn longest flight country first Nationals 1915 event club ran meet its own town results sent tabulated National Aero Club declared winner Building Model Planes Its easy get two-minute prop runs replica Lauders model doubt could have done 140 power considering rubber day fact props stated having 34-in pitch low power What would building mate rials youve grown accustom using suddenly unavailable Heres look what like pine basswood stuff models made EJim Noonan Before Balsa Era 62 Model Aviation used such pitch would have resulted really high altitude no freewheel ing props act brake causing re peated stalls quick loss altitude glide characteristics show rep lica Since twin pusher will float glide can lock props horizontal po sition plan fit model prop stopper actuated two bamboo bars some rubberbands dethermalizer fuse idea Don Lockwood However flight re cently Bong field makes hesitate bit about prolonging glide wound up about half capacity launched gentle thermals resulting model being just visible under cloud time power wound out about 70 sec props back-wound model stalled went long dive leveled out glided bit repeated sequence some four times before touching down Bongs thick cush ion weeds Best detherm ever Lauders model published May 1913 issue Aeronautics well Harpers Aircraft Book 1913 saw books years ago took until 1970 copy drawingand until 1987 build model Elliptical wings really new 1912 Frederick Lanchester building models England 1894 using ellipti cal plan form really innovative con cept 1912 very light effi cient structure Lauder used area far ahead anyone else very progressive Illinois Model Club interesting note superiority east ern modelers approach overall design compared other parts coun try succeeding years better ideas circulated via model pages cluded aviation magazines build models such need good woodworking tools small drill press handsaw scroll saw table saw prime needs Also required good assortment pliers wire bend ing soldering irons carving knife Zona handsaw Last least youll need drafting board its allied tools Proportional dividers will make scaling up drawings easy task selecting carving knife purchase Kabar similar high-quality tool carbon steel avoid stainless steel sharpen ing stone Continued page 148 /RSTcp 572/P pYA//HD W A1O722 577C4KS JL -x - LM K 2 VI/R I 0 August 1988 63 matched props carved basswood have slight bottom camber thin air foil section See text details Remember will need carve both leftand right-hand version Contrarotation props eliminates torque related problems Eq/L K C9A/S O3 Wi DL mixed satin catalyst proved lit tle too shiny scale nonetheless gave good base guys Boss grime up airbrushes ships done weighed 13 lb including rocket pods pilots have now flown ships over 17 lb definitely heavy model longstrokes handle 13 lb very well really something see big Huey doing stall turns pirouettes rpm Co bra response models Pro rotor head great fun zigzag across field low level power up sweeping down wind turn can pull power off descend time having blades popping very realistically Anyway have admit Hucys great fun can bet Ill build self right away Next month well take look Hirobos new Boeing Vertol tandem-rotor chopper Ill show set up cable drive tail ro tor Get some flying during meantime keep skids bottom touchdown BCNU RC Pylon Racing/Hager Continued page 60 Note channels RCl2 18 24 30 42 48 54 eliminated configurations Use three configurations possi ble free 31M combinations channels wideband-only matrixes given Configurations 4 5 6 free 31M combinations Channels RC38 40 44 46 50 56 Col 1 26 32 38 44 Configuration 4 Cal 2Cal 3Cal 4 281452 342016 4050any 4656any remaining channels drop whatever space available 50-54 MHz channels drop two available columns Cal 1 16 26 38 52 Configuration 5 Cal 2Ccl 3 2832 3444 4050 46any Cal 4 20 56 any remaining channels drop wherever space available 50-54 MHz channels drop two available columns Configuration 6 Cal 1 Cal 2 Cal 3 Cal 4 28341420 40465056 16 52 go either Col 1 Col 2 26 38 can go either Col 3 Col 4 32 44 go whichever two latter columns did nor receive 26/3 8 Note Contest Directors Configurations 4 5 6 following frequencies must paired same column matrix group together before starting make up matrix will simplify work 38 26 40 28 44 32 46 34 50 14 52 16 56 20 Send contest results pictures flying/building ideas can pass Support organization stands Pylon Racing Join NMPRA Dues $13/year nonflying member $22/year flying mem ber $25/year foreign members Send money Ron Schorr 5224 Teesdale North Hollywood CA 90617 must also clude AMA number events fly See Races PS Please note new address Its listed top column Before Balsa/Noonan Continued page 63 might add word about circular saw blades 10-in blade bit too large craft work find 8-in hollow-ground planer blade 8-in hollow-ground plywood blade need cut thing A2-sq Indoor balsa pine basswood prop blocks sheet strip wood ancient models Remember hold confine wood saw table fence After making cut blade tries lift wood upward will have make pine guides keep wood exactly want well keep fingers harm Carefully plan opera lions dry run before actually per forming Sawing difficult though permits build models conceivable method very low cost Locating Raw Materials Ordinary Japa nese tissue can model supply houses art supply stores stationery stores etc carry variety Japanese tis sues just did long before model supply houses came along Expect pay about dollar sheet will have nice selection weights textures Really light silk goldbeaters skins no longer obtainable today predoped tis sue best bet authenticity use white colored tissue did become available until about 1933 Lauder used Jap anese gampi silklike tissue some times available today called super fine long ago Basswood sheet strip several manufacturers available large hard ware stores dollhouse specialty stores hobby shops catering model railroad trade Spruce strip can found hobby stores carrying Radio Control model sup148 Model Aviation * Configuration 3 courtesy Owen S Black Carmichael CA 2628 3840 5052 2234 46 32 44 56 plies must usually resawed re quired sizes Bamboo can sometimes found listed yellow pages tele phone books larger cities sup plied manufacturers furniture etc best source pine lumber/home supply store Some really fine white pine made millwork can resawed sizes needed models Ordinary 3/4 -in boards also available some good lumber can found carving props well strip sheet wood Take enough time look 50 boards narrowing final selection about five choosing best clarity absence grain lines well lightness Liquids Rubber lube new coming popular use 1915 can make good lube much trouble today simply mixing tincture green soap glycerin equal amounts Both sold drugstores small bottles Nitrate dope best bet today both tissue cement proofing tissue wing covering Banana oil used until early 1930s Its ingredients varied somewhat basically amyl acetate nitrocellulose some gums dissolved purchasing nitrate dope avoid butyrate case always obtain proper thinner Commer cial lacquer thinners always compat ible Nitrate dope will also make model ce ment Just let stand open until becomes thick need built models way during war Dope easy ob tain liaison squadron Construction will need draw wing elevator full-size using singleline drawing divider compass will pick off dimensions small plan line layout Draw two spars wing el evator parallel other three inches apart Note center rib perpendicular others have trail ing edges radiating outward drawing included reduced size therefore use scale ruler reference Locate points dividers draw curved outlines pinning A-sq stick points penciling curves Once side laid out opposite side can traced complete wing exact outline Bamboo will principal material use shiny strips Strips about x A6 x 8 can bent water-soaking heating over large electric solder ing iron Work warm bamboo hands predrawn curve wing rib cooled strips split down middle repeatedly produce % x A6 ribs edge knife scrape nearly round section original model leading trailing edges also bamboo Since such long lengths very rare today edges made two laminated pieces spruce /32 x %2 x 15 making /16 x YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPIES form Plastic White Gelcoat Finish Fiberglass Replacements GMP Kait Schiuter Miniature Aircraft helicopters HEAT SHRINK COVERING Main Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40160 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver3mmWhip Antenna Allen Driver25 mmBlade Balancers Allen Driver -2mm Allen Driver15mm Flybar Weights Starter Extension Quilted Blade Covers aid Blade Stays available helicopters guaranteed ROUND OFF IiTRUSPIN does return $250 foro%PREWEIGHTED return shipment breakOMAIN BLADES tip please send *500 tip replacementFeatures Yaleweight installed return0holders attached white heatshrink shipment gsincluded Modeler must cover balance TRU-SPIN 0CUSTOM-BUILT BLADES iOLFeatures Weighted heat shrink color covering choice balanced reidy bolt Heat Shrink colors white black red blue yellow Allow weak delivery time Orders lr must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 toslot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available OMP Schluter Kait Minlature Aircraft helicopters * Our blades come money-back guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 305 466-8883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom4uiit blades special orders must prepaid peid credit card certified check section tapered toward wing tips water-soaked cemented Elmers carpenter glue bent pinned over plan Allow edges sev eral days thoroughly dry sand corners round Wing tips bamboo bent split make identical outlines main spars spruce / x center tapered / sq tips sanded round off edges Joining parts done Am broid butt joints progressively apply ing coats Ambroid until skin ex tends /2 in directions joint Dihedral joints reinforced thin sliv ers bamboo doublers extensive coverage Ambroid Such skin joints needed because Ambroid cannot pene Dealer Inquiries Invited Yale product distributors Ace R/C Inc Great Planes Model Diet. Horizon Model Distributors ABC imports soie UK Distributor 1 HOBBY MANUFACTURING CO INC 3896 Selvitz Rd Ft Pierce Florida 34881 4071 486-8883 3 trate hardwoods does balsa Covering single-surfaced wing doped tissue problem tissue predoped wood frame allowed thoroughly dry shrink before applying wing frames Wings con structed almost 20 years ago using method completely intact flying today Build rectangular frame rigid pine sticks about size sheet Japanese tissue Cement sheet tissue spray water Allow dry least day apply very thin coat nitrate dope both sides Repeat procedure let tissue dry full day hot sun shine Now cut tissue loose three sides let dry another day hanging August 1988 149 Independent Research Study Proves Black Baron Film Best Using sophisticated laboratory equipment independent study has published compares leading iron-on coverings sold USA film category Black Baron winner WEIGHTSHRINKTEMP Black Baron 13 oz 9%2400F Monokote178 oz19%3680 F Ultracote228 oz10%3700F WEIGHT Black Baron Film 27% lighter Monokote 43% lighter Ultracote Weights 1000 square inches SHRINIC Black Baron Film can shrink 19% Mono kote can shrink up 19% Ultracote stops mere 10% COLORS Opaques white black fire rec lite blue flag blue orange Cub yellow Fokker re4 cream Metalfiakes red blue silver Transparents red blue yellow SIZES Standard 6 foot rofis new 15 footers Both sizes 27 wide ALL OF WHICH EXPLAINS Film requires less its heatWHY BLACK BARON FILM potential shrink makes IS THE FASTESTGRO WING easier use Less HE WORLD bubbles sags & bnttle- $P..I7 IRON-ON COVERING ness SJL C0VERITE 420 BABYLON ROAD HORSHAM PA 19044 loose Cut off tissue sheet lay aside drying shrinking before attaching wing frames Use medium-thick dope paper cement letting paper lay naturally wing covered tissue will shrink tiny bit enough remove sag order keep weight near pos sible original model 2% oz rubber A-frame made 3/~ x % x 40-in pine sticks cut channel section %2 walls cap stripped Pine plugs inserted ends whole sembly cemented Ambroid Apply three coats dope sanding between coats make A-frame join sticks bevel nose spacing 11 apart 12-in-long tapered streamlined bamboo crosspiece projecting /2 end brace about /32 x /z center tapering /32 x ends Sand oval streamlined section fits notches cut sticks carries 040 ID eyelets tubes prop bearings Holes drilled bam boo thread binding Pure silk thread best Add four coats Ambroid set matched props takes long time make its worth itas much sheer pride displaying high-flying performance give model made before doing other parts model spread work out over carving sessions some 14 hours Using piece basswood discarded pattern shop gave matched blanks uni TEMPERATURE Black Baron form wood Blanks X-type /6 x 1Y4 x 12 drilled 040 Proceeding slowly working prop other remove shavings following predrawn lines need right hand left hand Very little bottom camber used thin airfoil section carved until blades /8 thick hub %2 tips trailing edges prop block sanded hand sanded bal anced weighed close uniformity Use coat dope sand apply two thin coats clear lacquer Other details wire elevator inci dence mount wire cans loops keep rubber motors place vented until 1915 Weigh out /8-in rubber two one-ounce pieces Tie six strands fasten place using 5 hooks winding An eggbeater winder needed wind both motors simultaneously Props must turn up out right-hand prop right holding model launching position Launch gently releas ing model straight level gentle power six strands lets climb quite slowly very long time tend think will take 2000 turns would give about 21/2 minutes power twin pusher usually has natural circle caused some small unbalanced force Moving wing tip slightly askew will trim circling Moving wing back ward toward props will smooth out stalling tendency twin forgiv ing flew well very start minor touches needed good trim Moreover said beginning really satisfying see two-dollar nonbalsa model circling high air among expensive contemporary models Makes feel plucky clever content Magazines pre-balsa era Aeronautics Aerial Age Popular Science Aircraft Practical Aviation American Boy Popular Mechanics Aero Digest Flying Aero & Hydro Scientific American FF Duration/Murphy Continued page 65 awards made official NFFS Symposium Thursday July 28 1988 during 1988 AMA Virginia Nationals Congratula tions honored Editorial encore stated last time prob ably wont read much about RC under Dura tion byline name attached lieve reasons given valid purpos es faithful pursue pages However recently caught associated short editorial Colorados Max-Out newsletter said article being accredited Rick Pangell saysContinued page 152 150 Model Aviation
Edition: Model Aviation - 1988/08
Page Numbers: 62, 63, 148, 149, 150
Twin pushers design day back early 1900s time putting flights mostly power above twominute mark author prepares launch replica 1912 Wallace Lauder model plane went win 1915 Nats ITS SPECIAL challenge source great satisfaction build replica model plane same materials used pre-balsa era 1907-1927 origi nal plans such airplanes published long ago various magazines can found larger libraries today Usually magazines bound volumes dividual pages can photocopied leaving modeler produce full-sized line drawing over model can built list of magazines found end article Some tractor models pulled prop props can found major ity good fliers twin pusher variety came sizes shapes ranged crude highly re fined Scale models era may built rule possess poor flying ability rarely true-to-scale also Indoor tractors first built about 1920 members Illinois MAC Club construction pine duration about 60 sec 1921 using bamboo-and-balsa con struction superfine silk tissue cover ing some refined technique material selection get minimum weight Bert Pond managed flight 2 mm 50 sec Bert still has model subject model well-designed twin pusher Wallace Lauder Carl Goldberg day October 20 1912 Lauders model won HandLaunched Duration contest Murray Hill NJ flight 223 achieved eight consecutive flights over 210 same day After flying replica conjecture flights mostly power little glide time finest modelers day Lauder went turn longest flight country first Nationals 1915 event club ran meet its own town results sent tabulated National Aero Club declared winner Building Model Planes Its easy get two-minute prop runs replica Lauders model doubt could have done 140 power considering rubber day fact props stated having 34-in pitch low power What would building mate rials youve grown accustom using suddenly unavailable Heres look what like pine basswood stuff models made EJim Noonan Before Balsa Era 62 Model Aviation used such pitch would have resulted really high altitude no freewheel ing props act brake causing re peated stalls quick loss altitude glide characteristics show rep lica Since twin pusher will float glide can lock props horizontal po sition plan fit model prop stopper actuated two bamboo bars some rubberbands dethermalizer fuse idea Don Lockwood However flight re cently Bong field makes hesitate bit about prolonging glide wound up about half capacity launched gentle thermals resulting model being just visible under cloud time power wound out about 70 sec props back-wound model stalled went long dive leveled out glided bit repeated sequence some four times before touching down Bongs thick cush ion weeds Best detherm ever Lauders model published May 1913 issue Aeronautics well Harpers Aircraft Book 1913 saw books years ago took until 1970 copy drawingand until 1987 build model Elliptical wings really new 1912 Frederick Lanchester building models England 1894 using ellipti cal plan form really innovative con cept 1912 very light effi cient structure Lauder used area far ahead anyone else very progressive Illinois Model Club interesting note superiority east ern modelers approach overall design compared other parts coun try succeeding years better ideas circulated via model pages cluded aviation magazines build models such need good woodworking tools small drill press handsaw scroll saw table saw prime needs Also required good assortment pliers wire bend ing soldering irons carving knife Zona handsaw Last least youll need drafting board its allied tools Proportional dividers will make scaling up drawings easy task selecting carving knife purchase Kabar similar high-quality tool carbon steel avoid stainless steel sharpen ing stone Continued page 148 /RSTcp 572/P pYA//HD W A1O722 577C4KS JL -x - LM K 2 VI/R I 0 August 1988 63 matched props carved basswood have slight bottom camber thin air foil section See text details Remember will need carve both leftand right-hand version Contrarotation props eliminates torque related problems Eq/L K C9A/S O3 Wi DL mixed satin catalyst proved lit tle too shiny scale nonetheless gave good base guys Boss grime up airbrushes ships done weighed 13 lb including rocket pods pilots have now flown ships over 17 lb definitely heavy model longstrokes handle 13 lb very well really something see big Huey doing stall turns pirouettes rpm Co bra response models Pro rotor head great fun zigzag across field low level power up sweeping down wind turn can pull power off descend time having blades popping very realistically Anyway have admit Hucys great fun can bet Ill build self right away Next month well take look Hirobos new Boeing Vertol tandem-rotor chopper Ill show set up cable drive tail ro tor Get some flying during meantime keep skids bottom touchdown BCNU RC Pylon Racing/Hager Continued page 60 Note channels RCl2 18 24 30 42 48 54 eliminated configurations Use three configurations possi ble free 31M combinations channels wideband-only matrixes given Configurations 4 5 6 free 31M combinations Channels RC38 40 44 46 50 56 Col 1 26 32 38 44 Configuration 4 Cal 2Cal 3Cal 4 281452 342016 4050any 4656any remaining channels drop whatever space available 50-54 MHz channels drop two available columns Cal 1 16 26 38 52 Configuration 5 Cal 2Ccl 3 2832 3444 4050 46any Cal 4 20 56 any remaining channels drop wherever space available 50-54 MHz channels drop two available columns Configuration 6 Cal 1 Cal 2 Cal 3 Cal 4 28341420 40465056 16 52 go either Col 1 Col 2 26 38 can go either Col 3 Col 4 32 44 go whichever two latter columns did nor receive 26/3 8 Note Contest Directors Configurations 4 5 6 following frequencies must paired same column matrix group together before starting make up matrix will simplify work 38 26 40 28 44 32 46 34 50 14 52 16 56 20 Send contest results pictures flying/building ideas can pass Support organization stands Pylon Racing Join NMPRA Dues $13/year nonflying member $22/year flying mem ber $25/year foreign members Send money Ron Schorr 5224 Teesdale North Hollywood CA 90617 must also clude AMA number events fly See Races PS Please note new address Its listed top column Before Balsa/Noonan Continued page 63 might add word about circular saw blades 10-in blade bit too large craft work find 8-in hollow-ground planer blade 8-in hollow-ground plywood blade need cut thing A2-sq Indoor balsa pine basswood prop blocks sheet strip wood ancient models Remember hold confine wood saw table fence After making cut blade tries lift wood upward will have make pine guides keep wood exactly want well keep fingers harm Carefully plan opera lions dry run before actually per forming Sawing difficult though permits build models conceivable method very low cost Locating Raw Materials Ordinary Japa nese tissue can model supply houses art supply stores stationery stores etc carry variety Japanese tis sues just did long before model supply houses came along Expect pay about dollar sheet will have nice selection weights textures Really light silk goldbeaters skins no longer obtainable today predoped tis sue best bet authenticity use white colored tissue did become available until about 1933 Lauder used Jap anese gampi silklike tissue some times available today called super fine long ago Basswood sheet strip several manufacturers available large hard ware stores dollhouse specialty stores hobby shops catering model railroad trade Spruce strip can found hobby stores carrying Radio Control model sup148 Model Aviation * Configuration 3 courtesy Owen S Black Carmichael CA 2628 3840 5052 2234 46 32 44 56 plies must usually resawed re quired sizes Bamboo can sometimes found listed yellow pages tele phone books larger cities sup plied manufacturers furniture etc best source pine lumber/home supply store Some really fine white pine made millwork can resawed sizes needed models Ordinary 3/4 -in boards also available some good lumber can found carving props well strip sheet wood Take enough time look 50 boards narrowing final selection about five choosing best clarity absence grain lines well lightness Liquids Rubber lube new coming popular use 1915 can make good lube much trouble today simply mixing tincture green soap glycerin equal amounts Both sold drugstores small bottles Nitrate dope best bet today both tissue cement proofing tissue wing covering Banana oil used until early 1930s Its ingredients varied somewhat basically amyl acetate nitrocellulose some gums dissolved purchasing nitrate dope avoid butyrate case always obtain proper thinner Commer cial lacquer thinners always compat ible Nitrate dope will also make model ce ment Just let stand open until becomes thick need built models way during war Dope easy ob tain liaison squadron Construction will need draw wing elevator full-size using singleline drawing divider compass will pick off dimensions small plan line layout Draw two spars wing el evator parallel other three inches apart Note center rib perpendicular others have trail ing edges radiating outward drawing included reduced size therefore use scale ruler reference Locate points dividers draw curved outlines pinning A-sq stick points penciling curves Once side laid out opposite side can traced complete wing exact outline Bamboo will principal material use shiny strips Strips about x A6 x 8 can bent water-soaking heating over large electric solder ing iron Work warm bamboo hands predrawn curve wing rib cooled strips split down middle repeatedly produce % x A6 ribs edge knife scrape nearly round section original model leading trailing edges also bamboo Since such long lengths very rare today edges made two laminated pieces spruce /32 x %2 x 15 making /16 x YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPIES form Plastic White Gelcoat Finish Fiberglass Replacements GMP Kait Schiuter Miniature Aircraft helicopters HEAT SHRINK COVERING Main Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40160 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver3mmWhip Antenna Allen Driver25 mmBlade Balancers Allen Driver -2mm Allen Driver15mm Flybar Weights Starter Extension Quilted Blade Covers aid Blade Stays available helicopters guaranteed ROUND OFF IiTRUSPIN does return $250 foro%PREWEIGHTED return shipment breakOMAIN BLADES tip please send *500 tip replacementFeatures Yaleweight installed return0holders attached white heatshrink shipment gsincluded Modeler must cover balance TRU-SPIN 0CUSTOM-BUILT BLADES iOLFeatures Weighted heat shrink color covering choice balanced reidy bolt Heat Shrink colors white black red blue yellow Allow weak delivery time Orders lr must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 toslot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available OMP Schluter Kait Minlature Aircraft helicopters * Our blades come money-back guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 305 466-8883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom4uiit blades special orders must prepaid peid credit card certified check section tapered toward wing tips water-soaked cemented Elmers carpenter glue bent pinned over plan Allow edges sev eral days thoroughly dry sand corners round Wing tips bamboo bent split make identical outlines main spars spruce / x center tapered / sq tips sanded round off edges Joining parts done Am broid butt joints progressively apply ing coats Ambroid until skin ex tends /2 in directions joint Dihedral joints reinforced thin sliv ers bamboo doublers extensive coverage Ambroid Such skin joints needed because Ambroid cannot pene Dealer Inquiries Invited Yale product distributors Ace R/C Inc Great Planes Model Diet. Horizon Model Distributors ABC imports soie UK Distributor 1 HOBBY MANUFACTURING CO INC 3896 Selvitz Rd Ft Pierce Florida 34881 4071 486-8883 3 trate hardwoods does balsa Covering single-surfaced wing doped tissue problem tissue predoped wood frame allowed thoroughly dry shrink before applying wing frames Wings con structed almost 20 years ago using method completely intact flying today Build rectangular frame rigid pine sticks about size sheet Japanese tissue Cement sheet tissue spray water Allow dry least day apply very thin coat nitrate dope both sides Repeat procedure let tissue dry full day hot sun shine Now cut tissue loose three sides let dry another day hanging August 1988 149 Independent Research Study Proves Black Baron Film Best Using sophisticated laboratory equipment independent study has published compares leading iron-on coverings sold USA film category Black Baron winner WEIGHTSHRINKTEMP Black Baron 13 oz 9%2400F Monokote178 oz19%3680 F Ultracote228 oz10%3700F WEIGHT Black Baron Film 27% lighter Monokote 43% lighter Ultracote Weights 1000 square inches SHRINIC Black Baron Film can shrink 19% Mono kote can shrink up 19% Ultracote stops mere 10% COLORS Opaques white black fire rec lite blue flag blue orange Cub yellow Fokker re4 cream Metalfiakes red blue silver Transparents red blue yellow SIZES Standard 6 foot rofis new 15 footers Both sizes 27 wide ALL OF WHICH EXPLAINS Film requires less its heatWHY BLACK BARON FILM potential shrink makes IS THE FASTESTGRO WING easier use Less HE WORLD bubbles sags & bnttle- $P..I7 IRON-ON COVERING ness SJL C0VERITE 420 BABYLON ROAD HORSHAM PA 19044 loose Cut off tissue sheet lay aside drying shrinking before attaching wing frames Use medium-thick dope paper cement letting paper lay naturally wing covered tissue will shrink tiny bit enough remove sag order keep weight near pos sible original model 2% oz rubber A-frame made 3/~ x % x 40-in pine sticks cut channel section %2 walls cap stripped Pine plugs inserted ends whole sembly cemented Ambroid Apply three coats dope sanding between coats make A-frame join sticks bevel nose spacing 11 apart 12-in-long tapered streamlined bamboo crosspiece projecting /2 end brace about /32 x /z center tapering /32 x ends Sand oval streamlined section fits notches cut sticks carries 040 ID eyelets tubes prop bearings Holes drilled bam boo thread binding Pure silk thread best Add four coats Ambroid set matched props takes long time make its worth itas much sheer pride displaying high-flying performance give model made before doing other parts model spread work out over carving sessions some 14 hours Using piece basswood discarded pattern shop gave matched blanks uni TEMPERATURE Black Baron form wood Blanks X-type /6 x 1Y4 x 12 drilled 040 Proceeding slowly working prop other remove shavings following predrawn lines need right hand left hand Very little bottom camber used thin airfoil section carved until blades /8 thick hub %2 tips trailing edges prop block sanded hand sanded bal anced weighed close uniformity Use coat dope sand apply two thin coats clear lacquer Other details wire elevator inci dence mount wire cans loops keep rubber motors place vented until 1915 Weigh out /8-in rubber two one-ounce pieces Tie six strands fasten place using 5 hooks winding An eggbeater winder needed wind both motors simultaneously Props must turn up out right-hand prop right holding model launching position Launch gently releas ing model straight level gentle power six strands lets climb quite slowly very long time tend think will take 2000 turns would give about 21/2 minutes power twin pusher usually has natural circle caused some small unbalanced force Moving wing tip slightly askew will trim circling Moving wing back ward toward props will smooth out stalling tendency twin forgiv ing flew well very start minor touches needed good trim Moreover said beginning really satisfying see two-dollar nonbalsa model circling high air among expensive contemporary models Makes feel plucky clever content Magazines pre-balsa era Aeronautics Aerial Age Popular Science Aircraft Practical Aviation American Boy Popular Mechanics Aero Digest Flying Aero & Hydro Scientific American FF Duration/Murphy Continued page 65 awards made official NFFS Symposium Thursday July 28 1988 during 1988 AMA Virginia Nationals Congratula tions honored Editorial encore stated last time prob ably wont read much about RC under Dura tion byline name attached lieve reasons given valid purpos es faithful pursue pages However recently caught associated short editorial Colorados Max-Out newsletter said article being accredited Rick Pangell saysContinued page 152 150 Model Aviation
Edition: Model Aviation - 1988/08
Page Numbers: 62, 63, 148, 149, 150
Twin pushers design day back early 1900s time putting flights mostly power above twominute mark author prepares launch replica 1912 Wallace Lauder model plane went win 1915 Nats ITS SPECIAL challenge source great satisfaction build replica model plane same materials used pre-balsa era 1907-1927 origi nal plans such airplanes published long ago various magazines can found larger libraries today Usually magazines bound volumes dividual pages can photocopied leaving modeler produce full-sized line drawing over model can built list of magazines found end article Some tractor models pulled prop props can found major ity good fliers twin pusher variety came sizes shapes ranged crude highly re fined Scale models era may built rule possess poor flying ability rarely true-to-scale also Indoor tractors first built about 1920 members Illinois MAC Club construction pine duration about 60 sec 1921 using bamboo-and-balsa con struction superfine silk tissue cover ing some refined technique material selection get minimum weight Bert Pond managed flight 2 mm 50 sec Bert still has model subject model well-designed twin pusher Wallace Lauder Carl Goldberg day October 20 1912 Lauders model won HandLaunched Duration contest Murray Hill NJ flight 223 achieved eight consecutive flights over 210 same day After flying replica conjecture flights mostly power little glide time finest modelers day Lauder went turn longest flight country first Nationals 1915 event club ran meet its own town results sent tabulated National Aero Club declared winner Building Model Planes Its easy get two-minute prop runs replica Lauders model doubt could have done 140 power considering rubber day fact props stated having 34-in pitch low power What would building mate rials youve grown accustom using suddenly unavailable Heres look what like pine basswood stuff models made EJim Noonan Before Balsa Era 62 Model Aviation used such pitch would have resulted really high altitude no freewheel ing props act brake causing re peated stalls quick loss altitude glide characteristics show rep lica Since twin pusher will float glide can lock props horizontal po sition plan fit model prop stopper actuated two bamboo bars some rubberbands dethermalizer fuse idea Don Lockwood However flight re cently Bong field makes hesitate bit about prolonging glide wound up about half capacity launched gentle thermals resulting model being just visible under cloud time power wound out about 70 sec props back-wound model stalled went long dive leveled out glided bit repeated sequence some four times before touching down Bongs thick cush ion weeds Best detherm ever Lauders model published May 1913 issue Aeronautics well Harpers Aircraft Book 1913 saw books years ago took until 1970 copy drawingand until 1987 build model Elliptical wings really new 1912 Frederick Lanchester building models England 1894 using ellipti cal plan form really innovative con cept 1912 very light effi cient structure Lauder used area far ahead anyone else very progressive Illinois Model Club interesting note superiority east ern modelers approach overall design compared other parts coun try succeeding years better ideas circulated via model pages cluded aviation magazines build models such need good woodworking tools small drill press handsaw scroll saw table saw prime needs Also required good assortment pliers wire bend ing soldering irons carving knife Zona handsaw Last least youll need drafting board its allied tools Proportional dividers will make scaling up drawings easy task selecting carving knife purchase Kabar similar high-quality tool carbon steel avoid stainless steel sharpen ing stone Continued page 148 /RSTcp 572/P pYA//HD W A1O722 577C4KS JL -x - LM K 2 VI/R I 0 August 1988 63 matched props carved basswood have slight bottom camber thin air foil section See text details Remember will need carve both leftand right-hand version Contrarotation props eliminates torque related problems Eq/L K C9A/S O3 Wi DL mixed satin catalyst proved lit tle too shiny scale nonetheless gave good base guys Boss grime up airbrushes ships done weighed 13 lb including rocket pods pilots have now flown ships over 17 lb definitely heavy model longstrokes handle 13 lb very well really something see big Huey doing stall turns pirouettes rpm Co bra response models Pro rotor head great fun zigzag across field low level power up sweeping down wind turn can pull power off descend time having blades popping very realistically Anyway have admit Hucys great fun can bet Ill build self right away Next month well take look Hirobos new Boeing Vertol tandem-rotor chopper Ill show set up cable drive tail ro tor Get some flying during meantime keep skids bottom touchdown BCNU RC Pylon Racing/Hager Continued page 60 Note channels RCl2 18 24 30 42 48 54 eliminated configurations Use three configurations possi ble free 31M combinations channels wideband-only matrixes given Configurations 4 5 6 free 31M combinations Channels RC38 40 44 46 50 56 Col 1 26 32 38 44 Configuration 4 Cal 2Cal 3Cal 4 281452 342016 4050any 4656any remaining channels drop whatever space available 50-54 MHz channels drop two available columns Cal 1 16 26 38 52 Configuration 5 Cal 2Ccl 3 2832 3444 4050 46any Cal 4 20 56 any remaining channels drop wherever space available 50-54 MHz channels drop two available columns Configuration 6 Cal 1 Cal 2 Cal 3 Cal 4 28341420 40465056 16 52 go either Col 1 Col 2 26 38 can go either Col 3 Col 4 32 44 go whichever two latter columns did nor receive 26/3 8 Note Contest Directors Configurations 4 5 6 following frequencies must paired same column matrix group together before starting make up matrix will simplify work 38 26 40 28 44 32 46 34 50 14 52 16 56 20 Send contest results pictures flying/building ideas can pass Support organization stands Pylon Racing Join NMPRA Dues $13/year nonflying member $22/year flying mem ber $25/year foreign members Send money Ron Schorr 5224 Teesdale North Hollywood CA 90617 must also clude AMA number events fly See Races PS Please note new address Its listed top column Before Balsa/Noonan Continued page 63 might add word about circular saw blades 10-in blade bit too large craft work find 8-in hollow-ground planer blade 8-in hollow-ground plywood blade need cut thing A2-sq Indoor balsa pine basswood prop blocks sheet strip wood ancient models Remember hold confine wood saw table fence After making cut blade tries lift wood upward will have make pine guides keep wood exactly want well keep fingers harm Carefully plan opera lions dry run before actually per forming Sawing difficult though permits build models conceivable method very low cost Locating Raw Materials Ordinary Japa nese tissue can model supply houses art supply stores stationery stores etc carry variety Japanese tis sues just did long before model supply houses came along Expect pay about dollar sheet will have nice selection weights textures Really light silk goldbeaters skins no longer obtainable today predoped tis sue best bet authenticity use white colored tissue did become available until about 1933 Lauder used Jap anese gampi silklike tissue some times available today called super fine long ago Basswood sheet strip several manufacturers available large hard ware stores dollhouse specialty stores hobby shops catering model railroad trade Spruce strip can found hobby stores carrying Radio Control model sup148 Model Aviation * Configuration 3 courtesy Owen S Black Carmichael CA 2628 3840 5052 2234 46 32 44 56 plies must usually resawed re quired sizes Bamboo can sometimes found listed yellow pages tele phone books larger cities sup plied manufacturers furniture etc best source pine lumber/home supply store Some really fine white pine made millwork can resawed sizes needed models Ordinary 3/4 -in boards also available some good lumber can found carving props well strip sheet wood Take enough time look 50 boards narrowing final selection about five choosing best clarity absence grain lines well lightness Liquids Rubber lube new coming popular use 1915 can make good lube much trouble today simply mixing tincture green soap glycerin equal amounts Both sold drugstores small bottles Nitrate dope best bet today both tissue cement proofing tissue wing covering Banana oil used until early 1930s Its ingredients varied somewhat basically amyl acetate nitrocellulose some gums dissolved purchasing nitrate dope avoid butyrate case always obtain proper thinner Commer cial lacquer thinners always compat ible Nitrate dope will also make model ce ment Just let stand open until becomes thick need built models way during war Dope easy ob tain liaison squadron Construction will need draw wing elevator full-size using singleline drawing divider compass will pick off dimensions small plan line layout Draw two spars wing el evator parallel other three inches apart Note center rib perpendicular others have trail ing edges radiating outward drawing included reduced size therefore use scale ruler reference Locate points dividers draw curved outlines pinning A-sq stick points penciling curves Once side laid out opposite side can traced complete wing exact outline Bamboo will principal material use shiny strips Strips about x A6 x 8 can bent water-soaking heating over large electric solder ing iron Work warm bamboo hands predrawn curve wing rib cooled strips split down middle repeatedly produce % x A6 ribs edge knife scrape nearly round section original model leading trailing edges also bamboo Since such long lengths very rare today edges made two laminated pieces spruce /32 x %2 x 15 making /16 x YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPIES form Plastic White Gelcoat Finish Fiberglass Replacements GMP Kait Schiuter Miniature Aircraft helicopters HEAT SHRINK COVERING Main Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40160 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver3mmWhip Antenna Allen Driver25 mmBlade Balancers Allen Driver -2mm Allen Driver15mm Flybar Weights Starter Extension Quilted Blade Covers aid Blade Stays available helicopters guaranteed ROUND OFF IiTRUSPIN does return $250 foro%PREWEIGHTED return shipment breakOMAIN BLADES tip please send *500 tip replacementFeatures Yaleweight installed return0holders attached white heatshrink shipment gsincluded Modeler must cover balance TRU-SPIN 0CUSTOM-BUILT BLADES iOLFeatures Weighted heat shrink color covering choice balanced reidy bolt Heat Shrink colors white black red blue yellow Allow weak delivery time Orders lr must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 toslot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available OMP Schluter Kait Minlature Aircraft helicopters * Our blades come money-back guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 305 466-8883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom4uiit blades special orders must prepaid peid credit card certified check section tapered toward wing tips water-soaked cemented Elmers carpenter glue bent pinned over plan Allow edges sev eral days thoroughly dry sand corners round Wing tips bamboo bent split make identical outlines main spars spruce / x center tapered / sq tips sanded round off edges Joining parts done Am broid butt joints progressively apply ing coats Ambroid until skin ex tends /2 in directions joint Dihedral joints reinforced thin sliv ers bamboo doublers extensive coverage Ambroid Such skin joints needed because Ambroid cannot pene Dealer Inquiries Invited Yale product distributors Ace R/C Inc Great Planes Model Diet. Horizon Model Distributors ABC imports soie UK Distributor 1 HOBBY MANUFACTURING CO INC 3896 Selvitz Rd Ft Pierce Florida 34881 4071 486-8883 3 trate hardwoods does balsa Covering single-surfaced wing doped tissue problem tissue predoped wood frame allowed thoroughly dry shrink before applying wing frames Wings con structed almost 20 years ago using method completely intact flying today Build rectangular frame rigid pine sticks about size sheet Japanese tissue Cement sheet tissue spray water Allow dry least day apply very thin coat nitrate dope both sides Repeat procedure let tissue dry full day hot sun shine Now cut tissue loose three sides let dry another day hanging August 1988 149 Independent Research Study Proves Black Baron Film Best Using sophisticated laboratory equipment independent study has published compares leading iron-on coverings sold USA film category Black Baron winner WEIGHTSHRINKTEMP Black Baron 13 oz 9%2400F Monokote178 oz19%3680 F Ultracote228 oz10%3700F WEIGHT Black Baron Film 27% lighter Monokote 43% lighter Ultracote Weights 1000 square inches SHRINIC Black Baron Film can shrink 19% Mono kote can shrink up 19% Ultracote stops mere 10% COLORS Opaques white black fire rec lite blue flag blue orange Cub yellow Fokker re4 cream Metalfiakes red blue silver Transparents red blue yellow SIZES Standard 6 foot rofis new 15 footers Both sizes 27 wide ALL OF WHICH EXPLAINS Film requires less its heatWHY BLACK BARON FILM potential shrink makes IS THE FASTESTGRO WING easier use Less HE WORLD bubbles sags & bnttle- $P..I7 IRON-ON COVERING ness SJL C0VERITE 420 BABYLON ROAD HORSHAM PA 19044 loose Cut off tissue sheet lay aside drying shrinking before attaching wing frames Use medium-thick dope paper cement letting paper lay naturally wing covered tissue will shrink tiny bit enough remove sag order keep weight near pos sible original model 2% oz rubber A-frame made 3/~ x % x 40-in pine sticks cut channel section %2 walls cap stripped Pine plugs inserted ends whole sembly cemented Ambroid Apply three coats dope sanding between coats make A-frame join sticks bevel nose spacing 11 apart 12-in-long tapered streamlined bamboo crosspiece projecting /2 end brace about /32 x /z center tapering /32 x ends Sand oval streamlined section fits notches cut sticks carries 040 ID eyelets tubes prop bearings Holes drilled bam boo thread binding Pure silk thread best Add four coats Ambroid set matched props takes long time make its worth itas much sheer pride displaying high-flying performance give model made before doing other parts model spread work out over carving sessions some 14 hours Using piece basswood discarded pattern shop gave matched blanks uni TEMPERATURE Black Baron form wood Blanks X-type /6 x 1Y4 x 12 drilled 040 Proceeding slowly working prop other remove shavings following predrawn lines need right hand left hand Very little bottom camber used thin airfoil section carved until blades /8 thick hub %2 tips trailing edges prop block sanded hand sanded bal anced weighed close uniformity Use coat dope sand apply two thin coats clear lacquer Other details wire elevator inci dence mount wire cans loops keep rubber motors place vented until 1915 Weigh out /8-in rubber two one-ounce pieces Tie six strands fasten place using 5 hooks winding An eggbeater winder needed wind both motors simultaneously Props must turn up out right-hand prop right holding model launching position Launch gently releas ing model straight level gentle power six strands lets climb quite slowly very long time tend think will take 2000 turns would give about 21/2 minutes power twin pusher usually has natural circle caused some small unbalanced force Moving wing tip slightly askew will trim circling Moving wing back ward toward props will smooth out stalling tendency twin forgiv ing flew well very start minor touches needed good trim Moreover said beginning really satisfying see two-dollar nonbalsa model circling high air among expensive contemporary models Makes feel plucky clever content Magazines pre-balsa era Aeronautics Aerial Age Popular Science Aircraft Practical Aviation American Boy Popular Mechanics Aero Digest Flying Aero & Hydro Scientific American FF Duration/Murphy Continued page 65 awards made official NFFS Symposium Thursday July 28 1988 during 1988 AMA Virginia Nationals Congratula tions honored Editorial encore stated last time prob ably wont read much about RC under Dura tion byline name attached lieve reasons given valid purpos es faithful pursue pages However recently caught associated short editorial Colorados Max-Out newsletter said article being accredited Rick Pangell saysContinued page 152 150 Model Aviation
Edition: Model Aviation - 1988/08
Page Numbers: 62, 63, 148, 149, 150
Twin pushers design day back early 1900s time putting flights mostly power above twominute mark author prepares launch replica 1912 Wallace Lauder model plane went win 1915 Nats ITS SPECIAL challenge source great satisfaction build replica model plane same materials used pre-balsa era 1907-1927 origi nal plans such airplanes published long ago various magazines can found larger libraries today Usually magazines bound volumes dividual pages can photocopied leaving modeler produce full-sized line drawing over model can built list of magazines found end article Some tractor models pulled prop props can found major ity good fliers twin pusher variety came sizes shapes ranged crude highly re fined Scale models era may built rule possess poor flying ability rarely true-to-scale also Indoor tractors first built about 1920 members Illinois MAC Club construction pine duration about 60 sec 1921 using bamboo-and-balsa con struction superfine silk tissue cover ing some refined technique material selection get minimum weight Bert Pond managed flight 2 mm 50 sec Bert still has model subject model well-designed twin pusher Wallace Lauder Carl Goldberg day October 20 1912 Lauders model won HandLaunched Duration contest Murray Hill NJ flight 223 achieved eight consecutive flights over 210 same day After flying replica conjecture flights mostly power little glide time finest modelers day Lauder went turn longest flight country first Nationals 1915 event club ran meet its own town results sent tabulated National Aero Club declared winner Building Model Planes Its easy get two-minute prop runs replica Lauders model doubt could have done 140 power considering rubber day fact props stated having 34-in pitch low power What would building mate rials youve grown accustom using suddenly unavailable Heres look what like pine basswood stuff models made EJim Noonan Before Balsa Era 62 Model Aviation used such pitch would have resulted really high altitude no freewheel ing props act brake causing re peated stalls quick loss altitude glide characteristics show rep lica Since twin pusher will float glide can lock props horizontal po sition plan fit model prop stopper actuated two bamboo bars some rubberbands dethermalizer fuse idea Don Lockwood However flight re cently Bong field makes hesitate bit about prolonging glide wound up about half capacity launched gentle thermals resulting model being just visible under cloud time power wound out about 70 sec props back-wound model stalled went long dive leveled out glided bit repeated sequence some four times before touching down Bongs thick cush ion weeds Best detherm ever Lauders model published May 1913 issue Aeronautics well Harpers Aircraft Book 1913 saw books years ago took until 1970 copy drawingand until 1987 build model Elliptical wings really new 1912 Frederick Lanchester building models England 1894 using ellipti cal plan form really innovative con cept 1912 very light effi cient structure Lauder used area far ahead anyone else very progressive Illinois Model Club interesting note superiority east ern modelers approach overall design compared other parts coun try succeeding years better ideas circulated via model pages cluded aviation magazines build models such need good woodworking tools small drill press handsaw scroll saw table saw prime needs Also required good assortment pliers wire bend ing soldering irons carving knife Zona handsaw Last least youll need drafting board its allied tools Proportional dividers will make scaling up drawings easy task selecting carving knife purchase Kabar similar high-quality tool carbon steel avoid stainless steel sharpen ing stone Continued page 148 /RSTcp 572/P pYA//HD W A1O722 577C4KS JL -x - LM K 2 VI/R I 0 August 1988 63 matched props carved basswood have slight bottom camber thin air foil section See text details Remember will need carve both leftand right-hand version Contrarotation props eliminates torque related problems Eq/L K C9A/S O3 Wi DL mixed satin catalyst proved lit tle too shiny scale nonetheless gave good base guys Boss grime up airbrushes ships done weighed 13 lb including rocket pods pilots have now flown ships over 17 lb definitely heavy model longstrokes handle 13 lb very well really something see big Huey doing stall turns pirouettes rpm Co bra response models Pro rotor head great fun zigzag across field low level power up sweeping down wind turn can pull power off descend time having blades popping very realistically Anyway have admit Hucys great fun can bet Ill build self right away Next month well take look Hirobos new Boeing Vertol tandem-rotor chopper Ill show set up cable drive tail ro tor Get some flying during meantime keep skids bottom touchdown BCNU RC Pylon Racing/Hager Continued page 60 Note channels RCl2 18 24 30 42 48 54 eliminated configurations Use three configurations possi ble free 31M combinations channels wideband-only matrixes given Configurations 4 5 6 free 31M combinations Channels RC38 40 44 46 50 56 Col 1 26 32 38 44 Configuration 4 Cal 2Cal 3Cal 4 281452 342016 4050any 4656any remaining channels drop whatever space available 50-54 MHz channels drop two available columns Cal 1 16 26 38 52 Configuration 5 Cal 2Ccl 3 2832 3444 4050 46any Cal 4 20 56 any remaining channels drop wherever space available 50-54 MHz channels drop two available columns Configuration 6 Cal 1 Cal 2 Cal 3 Cal 4 28341420 40465056 16 52 go either Col 1 Col 2 26 38 can go either Col 3 Col 4 32 44 go whichever two latter columns did nor receive 26/3 8 Note Contest Directors Configurations 4 5 6 following frequencies must paired same column matrix group together before starting make up matrix will simplify work 38 26 40 28 44 32 46 34 50 14 52 16 56 20 Send contest results pictures flying/building ideas can pass Support organization stands Pylon Racing Join NMPRA Dues $13/year nonflying member $22/year flying mem ber $25/year foreign members Send money Ron Schorr 5224 Teesdale North Hollywood CA 90617 must also clude AMA number events fly See Races PS Please note new address Its listed top column Before Balsa/Noonan Continued page 63 might add word about circular saw blades 10-in blade bit too large craft work find 8-in hollow-ground planer blade 8-in hollow-ground plywood blade need cut thing A2-sq Indoor balsa pine basswood prop blocks sheet strip wood ancient models Remember hold confine wood saw table fence After making cut blade tries lift wood upward will have make pine guides keep wood exactly want well keep fingers harm Carefully plan opera lions dry run before actually per forming Sawing difficult though permits build models conceivable method very low cost Locating Raw Materials Ordinary Japa nese tissue can model supply houses art supply stores stationery stores etc carry variety Japanese tis sues just did long before model supply houses came along Expect pay about dollar sheet will have nice selection weights textures Really light silk goldbeaters skins no longer obtainable today predoped tis sue best bet authenticity use white colored tissue did become available until about 1933 Lauder used Jap anese gampi silklike tissue some times available today called super fine long ago Basswood sheet strip several manufacturers available large hard ware stores dollhouse specialty stores hobby shops catering model railroad trade Spruce strip can found hobby stores carrying Radio Control model sup148 Model Aviation * Configuration 3 courtesy Owen S Black Carmichael CA 2628 3840 5052 2234 46 32 44 56 plies must usually resawed re quired sizes Bamboo can sometimes found listed yellow pages tele phone books larger cities sup plied manufacturers furniture etc best source pine lumber/home supply store Some really fine white pine made millwork can resawed sizes needed models Ordinary 3/4 -in boards also available some good lumber can found carving props well strip sheet wood Take enough time look 50 boards narrowing final selection about five choosing best clarity absence grain lines well lightness Liquids Rubber lube new coming popular use 1915 can make good lube much trouble today simply mixing tincture green soap glycerin equal amounts Both sold drugstores small bottles Nitrate dope best bet today both tissue cement proofing tissue wing covering Banana oil used until early 1930s Its ingredients varied somewhat basically amyl acetate nitrocellulose some gums dissolved purchasing nitrate dope avoid butyrate case always obtain proper thinner Commer cial lacquer thinners always compat ible Nitrate dope will also make model ce ment Just let stand open until becomes thick need built models way during war Dope easy ob tain liaison squadron Construction will need draw wing elevator full-size using singleline drawing divider compass will pick off dimensions small plan line layout Draw two spars wing el evator parallel other three inches apart Note center rib perpendicular others have trail ing edges radiating outward drawing included reduced size therefore use scale ruler reference Locate points dividers draw curved outlines pinning A-sq stick points penciling curves Once side laid out opposite side can traced complete wing exact outline Bamboo will principal material use shiny strips Strips about x A6 x 8 can bent water-soaking heating over large electric solder ing iron Work warm bamboo hands predrawn curve wing rib cooled strips split down middle repeatedly produce % x A6 ribs edge knife scrape nearly round section original model leading trailing edges also bamboo Since such long lengths very rare today edges made two laminated pieces spruce /32 x %2 x 15 making /16 x YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPIES form Plastic White Gelcoat Finish Fiberglass Replacements GMP Kait Schiuter Miniature Aircraft helicopters HEAT SHRINK COVERING Main Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40160 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver3mmWhip Antenna Allen Driver25 mmBlade Balancers Allen Driver -2mm Allen Driver15mm Flybar Weights Starter Extension Quilted Blade Covers aid Blade Stays available helicopters guaranteed ROUND OFF IiTRUSPIN does return $250 foro%PREWEIGHTED return shipment breakOMAIN BLADES tip please send *500 tip replacementFeatures Yaleweight installed return0holders attached white heatshrink shipment gsincluded Modeler must cover balance TRU-SPIN 0CUSTOM-BUILT BLADES iOLFeatures Weighted heat shrink color covering choice balanced reidy bolt Heat Shrink colors white black red blue yellow Allow weak delivery time Orders lr must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 toslot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available OMP Schluter Kait Minlature Aircraft helicopters * Our blades come money-back guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 305 466-8883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom4uiit blades special orders must prepaid peid credit card certified check section tapered toward wing tips water-soaked cemented Elmers carpenter glue bent pinned over plan Allow edges sev eral days thoroughly dry sand corners round Wing tips bamboo bent split make identical outlines main spars spruce / x center tapered / sq tips sanded round off edges Joining parts done Am broid butt joints progressively apply ing coats Ambroid until skin ex tends /2 in directions joint Dihedral joints reinforced thin sliv ers bamboo doublers extensive coverage Ambroid Such skin joints needed because Ambroid cannot pene Dealer Inquiries Invited Yale product distributors Ace R/C Inc Great Planes Model Diet. Horizon Model Distributors ABC imports soie UK Distributor 1 HOBBY MANUFACTURING CO INC 3896 Selvitz Rd Ft Pierce Florida 34881 4071 486-8883 3 trate hardwoods does balsa Covering single-surfaced wing doped tissue problem tissue predoped wood frame allowed thoroughly dry shrink before applying wing frames Wings con structed almost 20 years ago using method completely intact flying today Build rectangular frame rigid pine sticks about size sheet Japanese tissue Cement sheet tissue spray water Allow dry least day apply very thin coat nitrate dope both sides Repeat procedure let tissue dry full day hot sun shine Now cut tissue loose three sides let dry another day hanging August 1988 149 Independent Research Study Proves Black Baron Film Best Using sophisticated laboratory equipment independent study has published compares leading iron-on coverings sold USA film category Black Baron winner WEIGHTSHRINKTEMP Black Baron 13 oz 9%2400F Monokote178 oz19%3680 F Ultracote228 oz10%3700F WEIGHT Black Baron Film 27% lighter Monokote 43% lighter Ultracote Weights 1000 square inches SHRINIC Black Baron Film can shrink 19% Mono kote can shrink up 19% Ultracote stops mere 10% COLORS Opaques white black fire rec lite blue flag blue orange Cub yellow Fokker re4 cream Metalfiakes red blue silver Transparents red blue yellow SIZES Standard 6 foot rofis new 15 footers Both sizes 27 wide ALL OF WHICH EXPLAINS Film requires less its heatWHY BLACK BARON FILM potential shrink makes IS THE FASTESTGRO WING easier use Less HE WORLD bubbles sags & bnttle- $P..I7 IRON-ON COVERING ness SJL C0VERITE 420 BABYLON ROAD HORSHAM PA 19044 loose Cut off tissue sheet lay aside drying shrinking before attaching wing frames Use medium-thick dope paper cement letting paper lay naturally wing covered tissue will shrink tiny bit enough remove sag order keep weight near pos sible original model 2% oz rubber A-frame made 3/~ x % x 40-in pine sticks cut channel section %2 walls cap stripped Pine plugs inserted ends whole sembly cemented Ambroid Apply three coats dope sanding between coats make A-frame join sticks bevel nose spacing 11 apart 12-in-long tapered streamlined bamboo crosspiece projecting /2 end brace about /32 x /z center tapering /32 x ends Sand oval streamlined section fits notches cut sticks carries 040 ID eyelets tubes prop bearings Holes drilled bam boo thread binding Pure silk thread best Add four coats Ambroid set matched props takes long time make its worth itas much sheer pride displaying high-flying performance give model made before doing other parts model spread work out over carving sessions some 14 hours Using piece basswood discarded pattern shop gave matched blanks uni TEMPERATURE Black Baron form wood Blanks X-type /6 x 1Y4 x 12 drilled 040 Proceeding slowly working prop other remove shavings following predrawn lines need right hand left hand Very little bottom camber used thin airfoil section carved until blades /8 thick hub %2 tips trailing edges prop block sanded hand sanded bal anced weighed close uniformity Use coat dope sand apply two thin coats clear lacquer Other details wire elevator inci dence mount wire cans loops keep rubber motors place vented until 1915 Weigh out /8-in rubber two one-ounce pieces Tie six strands fasten place using 5 hooks winding An eggbeater winder needed wind both motors simultaneously Props must turn up out right-hand prop right holding model launching position Launch gently releas ing model straight level gentle power six strands lets climb quite slowly very long time tend think will take 2000 turns would give about 21/2 minutes power twin pusher usually has natural circle caused some small unbalanced force Moving wing tip slightly askew will trim circling Moving wing back ward toward props will smooth out stalling tendency twin forgiv ing flew well very start minor touches needed good trim Moreover said beginning really satisfying see two-dollar nonbalsa model circling high air among expensive contemporary models Makes feel plucky clever content Magazines pre-balsa era Aeronautics Aerial Age Popular Science Aircraft Practical Aviation American Boy Popular Mechanics Aero Digest Flying Aero & Hydro Scientific American FF Duration/Murphy Continued page 65 awards made official NFFS Symposium Thursday July 28 1988 during 1988 AMA Virginia Nationals Congratula tions honored Editorial encore stated last time prob ably wont read much about RC under Dura tion byline name attached lieve reasons given valid purpos es faithful pursue pages However recently caught associated short editorial Colorados Max-Out newsletter said article being accredited Rick Pangell saysContinued page 152 150 Model Aviation
Edition: Model Aviation - 1988/08
Page Numbers: 62, 63, 148, 149, 150
Twin pushers design day back early 1900s time putting flights mostly power above twominute mark author prepares launch replica 1912 Wallace Lauder model plane went win 1915 Nats ITS SPECIAL challenge source great satisfaction build replica model plane same materials used pre-balsa era 1907-1927 origi nal plans such airplanes published long ago various magazines can found larger libraries today Usually magazines bound volumes dividual pages can photocopied leaving modeler produce full-sized line drawing over model can built list of magazines found end article Some tractor models pulled prop props can found major ity good fliers twin pusher variety came sizes shapes ranged crude highly re fined Scale models era may built rule possess poor flying ability rarely true-to-scale also Indoor tractors first built about 1920 members Illinois MAC Club construction pine duration about 60 sec 1921 using bamboo-and-balsa con struction superfine silk tissue cover ing some refined technique material selection get minimum weight Bert Pond managed flight 2 mm 50 sec Bert still has model subject model well-designed twin pusher Wallace Lauder Carl Goldberg day October 20 1912 Lauders model won HandLaunched Duration contest Murray Hill NJ flight 223 achieved eight consecutive flights over 210 same day After flying replica conjecture flights mostly power little glide time finest modelers day Lauder went turn longest flight country first Nationals 1915 event club ran meet its own town results sent tabulated National Aero Club declared winner Building Model Planes Its easy get two-minute prop runs replica Lauders model doubt could have done 140 power considering rubber day fact props stated having 34-in pitch low power What would building mate rials youve grown accustom using suddenly unavailable Heres look what like pine basswood stuff models made EJim Noonan Before Balsa Era 62 Model Aviation used such pitch would have resulted really high altitude no freewheel ing props act brake causing re peated stalls quick loss altitude glide characteristics show rep lica Since twin pusher will float glide can lock props horizontal po sition plan fit model prop stopper actuated two bamboo bars some rubberbands dethermalizer fuse idea Don Lockwood However flight re cently Bong field makes hesitate bit about prolonging glide wound up about half capacity launched gentle thermals resulting model being just visible under cloud time power wound out about 70 sec props back-wound model stalled went long dive leveled out glided bit repeated sequence some four times before touching down Bongs thick cush ion weeds Best detherm ever Lauders model published May 1913 issue Aeronautics well Harpers Aircraft Book 1913 saw books years ago took until 1970 copy drawingand until 1987 build model Elliptical wings really new 1912 Frederick Lanchester building models England 1894 using ellipti cal plan form really innovative con cept 1912 very light effi cient structure Lauder used area far ahead anyone else very progressive Illinois Model Club interesting note superiority east ern modelers approach overall design compared other parts coun try succeeding years better ideas circulated via model pages cluded aviation magazines build models such need good woodworking tools small drill press handsaw scroll saw table saw prime needs Also required good assortment pliers wire bend ing soldering irons carving knife Zona handsaw Last least youll need drafting board its allied tools Proportional dividers will make scaling up drawings easy task selecting carving knife purchase Kabar similar high-quality tool carbon steel avoid stainless steel sharpen ing stone Continued page 148 /RSTcp 572/P pYA//HD W A1O722 577C4KS JL -x - LM K 2 VI/R I 0 August 1988 63 matched props carved basswood have slight bottom camber thin air foil section See text details Remember will need carve both leftand right-hand version Contrarotation props eliminates torque related problems Eq/L K C9A/S O3 Wi DL mixed satin catalyst proved lit tle too shiny scale nonetheless gave good base guys Boss grime up airbrushes ships done weighed 13 lb including rocket pods pilots have now flown ships over 17 lb definitely heavy model longstrokes handle 13 lb very well really something see big Huey doing stall turns pirouettes rpm Co bra response models Pro rotor head great fun zigzag across field low level power up sweeping down wind turn can pull power off descend time having blades popping very realistically Anyway have admit Hucys great fun can bet Ill build self right away Next month well take look Hirobos new Boeing Vertol tandem-rotor chopper Ill show set up cable drive tail ro tor Get some flying during meantime keep skids bottom touchdown BCNU RC Pylon Racing/Hager Continued page 60 Note channels RCl2 18 24 30 42 48 54 eliminated configurations Use three configurations possi ble free 31M combinations channels wideband-only matrixes given Configurations 4 5 6 free 31M combinations Channels RC38 40 44 46 50 56 Col 1 26 32 38 44 Configuration 4 Cal 2Cal 3Cal 4 281452 342016 4050any 4656any remaining channels drop whatever space available 50-54 MHz channels drop two available columns Cal 1 16 26 38 52 Configuration 5 Cal 2Ccl 3 2832 3444 4050 46any Cal 4 20 56 any remaining channels drop wherever space available 50-54 MHz channels drop two available columns Configuration 6 Cal 1 Cal 2 Cal 3 Cal 4 28341420 40465056 16 52 go either Col 1 Col 2 26 38 can go either Col 3 Col 4 32 44 go whichever two latter columns did nor receive 26/3 8 Note Contest Directors Configurations 4 5 6 following frequencies must paired same column matrix group together before starting make up matrix will simplify work 38 26 40 28 44 32 46 34 50 14 52 16 56 20 Send contest results pictures flying/building ideas can pass Support organization stands Pylon Racing Join NMPRA Dues $13/year nonflying member $22/year flying mem ber $25/year foreign members Send money Ron Schorr 5224 Teesdale North Hollywood CA 90617 must also clude AMA number events fly See Races PS Please note new address Its listed top column Before Balsa/Noonan Continued page 63 might add word about circular saw blades 10-in blade bit too large craft work find 8-in hollow-ground planer blade 8-in hollow-ground plywood blade need cut thing A2-sq Indoor balsa pine basswood prop blocks sheet strip wood ancient models Remember hold confine wood saw table fence After making cut blade tries lift wood upward will have make pine guides keep wood exactly want well keep fingers harm Carefully plan opera lions dry run before actually per forming Sawing difficult though permits build models conceivable method very low cost Locating Raw Materials Ordinary Japa nese tissue can model supply houses art supply stores stationery stores etc carry variety Japanese tis sues just did long before model supply houses came along Expect pay about dollar sheet will have nice selection weights textures Really light silk goldbeaters skins no longer obtainable today predoped tis sue best bet authenticity use white colored tissue did become available until about 1933 Lauder used Jap anese gampi silklike tissue some times available today called super fine long ago Basswood sheet strip several manufacturers available large hard ware stores dollhouse specialty stores hobby shops catering model railroad trade Spruce strip can found hobby stores carrying Radio Control model sup148 Model Aviation * Configuration 3 courtesy Owen S Black Carmichael CA 2628 3840 5052 2234 46 32 44 56 plies must usually resawed re quired sizes Bamboo can sometimes found listed yellow pages tele phone books larger cities sup plied manufacturers furniture etc best source pine lumber/home supply store Some really fine white pine made millwork can resawed sizes needed models Ordinary 3/4 -in boards also available some good lumber can found carving props well strip sheet wood Take enough time look 50 boards narrowing final selection about five choosing best clarity absence grain lines well lightness Liquids Rubber lube new coming popular use 1915 can make good lube much trouble today simply mixing tincture green soap glycerin equal amounts Both sold drugstores small bottles Nitrate dope best bet today both tissue cement proofing tissue wing covering Banana oil used until early 1930s Its ingredients varied somewhat basically amyl acetate nitrocellulose some gums dissolved purchasing nitrate dope avoid butyrate case always obtain proper thinner Commer cial lacquer thinners always compat ible Nitrate dope will also make model ce ment Just let stand open until becomes thick need built models way during war Dope easy ob tain liaison squadron Construction will need draw wing elevator full-size using singleline drawing divider compass will pick off dimensions small plan line layout Draw two spars wing el evator parallel other three inches apart Note center rib perpendicular others have trail ing edges radiating outward drawing included reduced size therefore use scale ruler reference Locate points dividers draw curved outlines pinning A-sq stick points penciling curves Once side laid out opposite side can traced complete wing exact outline Bamboo will principal material use shiny strips Strips about x A6 x 8 can bent water-soaking heating over large electric solder ing iron Work warm bamboo hands predrawn curve wing rib cooled strips split down middle repeatedly produce % x A6 ribs edge knife scrape nearly round section original model leading trailing edges also bamboo Since such long lengths very rare today edges made two laminated pieces spruce /32 x %2 x 15 making /16 x YALE HOBBY MFGU CO INC YALE REPLACEMENT MAIN SHAFTS YALE FLYBARS GMP Kalt Schluter Miniature Aircraft helicopters YALE CANOPIES form Plastic White Gelcoat Finish Fiberglass Replacements GMP Kait Schiuter Miniature Aircraft helicopters HEAT SHRINK COVERING Main Tail blades Available black white red blue yellow Yaleweight Kit Two Pound Yaleweight Kit Mixing Arms Cobra/Competitor Training Gear -28 Size Helicopter Training Gear -40160 size Helicopter Reinforcement Brackets Quilted Blade Covers YALE ACCESSORIES Allen Driver3mmWhip Antenna Allen Driver25 mmBlade Balancers Allen Driver -2mm Allen Driver15mm Flybar Weights Starter Extension Quilted Blade Covers aid Blade Stays available helicopters guaranteed ROUND OFF IiTRUSPIN does return $250 foro%PREWEIGHTED return shipment breakOMAIN BLADES tip please send *500 tip replacementFeatures Yaleweight installed return0holders attached white heatshrink shipment gsincluded Modeler must cover balance TRU-SPIN 0CUSTOM-BUILT BLADES iOLFeatures Weighted heat shrink color covering choice balanced reidy bolt Heat Shrink colors white black red blue yellow Allow weak delivery time Orders lr must prepaid paid credit card * Standard Tru-Spin Main Tail blades come white heat shrink covering Add *300 toslot blades Yaleweight * Tru-Spin Rotor Blades superior quality lower prices Replacement blades available OMP Schluter Kait Minlature Aircraft helicopters * Our blades come money-back guarantee replacement item against manufacturing defects Send Price List INSTANT SHIPMENT HOT LINE 305 466-8883 Shipping/COD charges extra MasterCard VISA accepted No COD orders shipped outside USA Custom4uiit blades special orders must prepaid peid credit card certified check section tapered toward wing tips water-soaked cemented Elmers carpenter glue bent pinned over plan Allow edges sev eral days thoroughly dry sand corners round Wing tips bamboo bent split make identical outlines main spars spruce / x center tapered / sq tips sanded round off edges Joining parts done Am broid butt joints progressively apply ing coats Ambroid until skin ex tends /2 in directions joint Dihedral joints reinforced thin sliv ers bamboo doublers extensive coverage Ambroid Such skin joints needed because Ambroid cannot pene Dealer Inquiries Invited Yale product distributors Ace R/C Inc Great Planes Model Diet. Horizon Model Distributors ABC imports soie UK Distributor 1 HOBBY MANUFACTURING CO INC 3896 Selvitz Rd Ft Pierce Florida 34881 4071 486-8883 3 trate hardwoods does balsa Covering single-surfaced wing doped tissue problem tissue predoped wood frame allowed thoroughly dry shrink before applying wing frames Wings con structed almost 20 years ago using method completely intact flying today Build rectangular frame rigid pine sticks about size sheet Japanese tissue Cement sheet tissue spray water Allow dry least day apply very thin coat nitrate dope both sides Repeat procedure let tissue dry full day hot sun shine Now cut tissue loose three sides let dry another day hanging August 1988 149 Independent Research Study Proves Black Baron Film Best Using sophisticated laboratory equipment independent study has published compares leading iron-on coverings sold USA film category Black Baron winner WEIGHTSHRINKTEMP Black Baron 13 oz 9%2400F Monokote178 oz19%3680 F Ultracote228 oz10%3700F WEIGHT Black Baron Film 27% lighter Monokote 43% lighter Ultracote Weights 1000 square inches SHRINIC Black Baron Film can shrink 19% Mono kote can shrink up 19% Ultracote stops mere 10% COLORS Opaques white black fire rec lite blue flag blue orange Cub yellow Fokker re4 cream Metalfiakes red blue silver Transparents red blue yellow SIZES Standard 6 foot rofis new 15 footers Both sizes 27 wide ALL OF WHICH EXPLAINS Film requires less its heatWHY BLACK BARON FILM potential shrink makes IS THE FASTESTGRO WING easier use Less HE WORLD bubbles sags & bnttle- $P..I7 IRON-ON COVERING ness SJL C0VERITE 420 BABYLON ROAD HORSHAM PA 19044 loose Cut off tissue sheet lay aside drying shrinking before attaching wing frames Use medium-thick dope paper cement letting paper lay naturally wing covered tissue will shrink tiny bit enough remove sag order keep weight near pos sible original model 2% oz rubber A-frame made 3/~ x % x 40-in pine sticks cut channel section %2 walls cap stripped Pine plugs inserted ends whole sembly cemented Ambroid Apply three coats dope sanding between coats make A-frame join sticks bevel nose spacing 11 apart 12-in-long tapered streamlined bamboo crosspiece projecting /2 end brace about /32 x /z center tapering /32 x ends Sand oval streamlined section fits notches cut sticks carries 040 ID eyelets tubes prop bearings Holes drilled bam boo thread binding Pure silk thread best Add four coats Ambroid set matched props takes long time make its worth itas much sheer pride displaying high-flying performance give model made before doing other parts model spread work out over carving sessions some 14 hours Using piece basswood discarded pattern shop gave matched blanks uni TEMPERATURE Black Baron form wood Blanks X-type /6 x 1Y4 x 12 drilled 040 Proceeding slowly working prop other remove shavings following predrawn lines need right hand left hand Very little bottom camber used thin airfoil section carved until blades /8 thick hub %2 tips trailing edges prop block sanded hand sanded bal anced weighed close uniformity Use coat dope sand apply two thin coats clear lacquer Other details wire elevator inci dence mount wire cans loops keep rubber motors place vented until 1915 Weigh out /8-in rubber two one-ounce pieces Tie six strands fasten place using 5 hooks winding An eggbeater winder needed wind both motors simultaneously Props must turn up out right-hand prop right holding model launching position Launch gently releas ing model straight level gentle power six strands lets climb quite slowly very long time tend think will take 2000 turns would give about 21/2 minutes power twin pusher usually has natural circle caused some small unbalanced force Moving wing tip slightly askew will trim circling Moving wing back ward toward props will smooth out stalling tendency twin forgiv ing flew well very start minor touches needed good trim Moreover said beginning really satisfying see two-dollar nonbalsa model circling high air among expensive contemporary models Makes feel plucky clever content Magazines pre-balsa era Aeronautics Aerial Age Popular Science Aircraft Practical Aviation American Boy Popular Mechanics Aero Digest Flying Aero & Hydro Scientific American FF Duration/Murphy Continued page 65 awards made official NFFS Symposium Thursday July 28 1988 during 1988 AMA Virginia Nationals Congratula tions honored Editorial encore stated last time prob ably wont read much about RC under Dura tion byline name attached lieve reasons given valid purpos es faithful pursue pages However recently caught associated short editorial Colorados Max-Out newsletter said article being accredited Rick Pangell saysContinued page 152 150 Model Aviation