C SCALE Bob & Dolly Wischer EQUIPMENT installations current trend toward larger Scale models problems hiding receiver batteries servos becomes less acute However fact remains kits being built large plane variety hobby shop owner will attest Scale modelers attempt cockpit cabin detailing smaller planes faced very real situation satisfactory installions RC equip ment Finding space really tight interior always easy since weightier components should preferably near center gravity space normally occupiedon prototype human cargo time recent past Sport Scale builders ignored cockpit cabin interiors Anyone peers inside some better examples class should surprised find detailing match what normally found Precision Scale constant improvement up-grading has always us categories aeromodeling Satisfaction ac complishment competitive attitude reasons enough progress direction have told few modelers trend counter-productive will doom Sport Scale contest event does seem happending event continues grow Does seem impossible squeeze receiver servos cockpit along seats instrument panels controls pilots Dont give up too quickly newer small servos will fit tiniest spaces example seat could cover two three servos pilots body could hollow contain receiver Joe McCollum fitted servos inside pilot move arms legs actually flew plane through cockpit controls Volksplane Concealing wiring could real problem area can bundled space under servos extension cords passing beneath floor World War II military planes blessed small cockpit volume compated total fuselage interior space normally occupied fuel tanks armament can used equipment Civil types need careful plan ning squeeze equipment interior too easily visible through large cockpit open ings through canopies windows doors throttle pushrod made heavy flexible cable needs concealed cockpit sidewalls narrow fuselage rod can quite easily connected directly engine throttle wide fuselages such side-byside seating arrangement bellcrank lever may needed forward firewall bring linear motion alignment engine throttle An alternative method places throttle servo engine compartment exten sion cord back receiver servo mounted close vibration source requires careful shock mounting well protection engine oil have made practice use engines carburetor throttle-stop idling transmiters throttle-lever rearmost travel position used idle move transmitter throttle trim lever toward idle position realistic engine stop end flight modelers have asked about location receiver antenna models visible antenna Scale model eyesore prefer run antenna internally down fuselage bottom extends out fuselage through small hole rear knot keeps retracting tiny knot almost 26 Model Aviation An exceptional model Bob Nelitz 1/a-scale Piper J-3 Cub has 1 2-ft span Its Quadra engine almost invisible Photo upper left gives overall im pression shows functional bungee landing gear Picture upper right shows detail scale Continental engine scale Sensenich propwith metal leading edges Model flies prop Note wired spark plugs authentic induction system hoses clamps retaining clips cowling safety-wire propmounting bolts Photo lower left lets us see scale pilot leather jacket magneto switch above head Throttle quadrants fuel valve have correct labels Piper nameplate fuselage side has raised lettering Picture lower right gives interior detailupholstered seat map pocket seat belt scuff protection door-edge invisible models use stainless steel control line cable operate tail surfaces place pushrods save weight preserve scale appearance wires fastened ends plywood operating levers control horns though antenna close proximity wires may touch has no radio interference loss seat baggage compartment standard servo tray too difficult hide resort plywood servo rails maximum strength minimum size laminate two 1/16-in ply strips using white glue adhesive under pressure form rail Very rare Scale plane doesnt need Continued page 99 January 1981 27 LI Moore built Henschei 1 26A1 Dennis Bryants plans its scale isl% structure covered paperand finished dope talc followed Aero Gloss Webra 61 Blackhead powers Photo rear cockpit has gunner camera hand Canopy slides rails Note scuffed foothoids fuselage side range Royal Kraft equipment very likely due wires being anchored wood levers rather metal steel wires cross close proximity slip piece insulating tube over held place drop adhesive prevent rubbing wires being RF noise source mount servos concealed manner beneath gettingIan Waterloo Scale Rally Focke190 D9 Platt kit Model finished K&B Superpoxy over Super Coverite mis consosaasea lY atalina built trom HM plans Louis Botari pair OS Max 15s power 60-in-span model Louis flies Rose City Model Flyers Weiland Ontario Canada Werner Doser Michigans East Wings club model scratch built Bruce Lund plans Although spans five ft 1/4-scale Model finished dope over Super Coverite Spruce Goose has ihts th____ ago Hughes spans 16 ft powered eight - sound beyond compare structure foam covered balsa fuselage 1/16-in veneer wings BEGINNER TO PRO ES HOT STUFF JUST RIGHT FOR YOU HOT STUFF ORIGINAL CLEAR FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec THIS IS THE ONE THAT STARTED IT ALL 1/4 1/2 2 oz EXCLUSIVE VISIBLE FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec HOT STUFF ELU LINEE t4E~ HOT STUFF GAP FILLING FILLETING POSITIONABLE HIGH VISCOSITY-TIMED BOND 10 25 sec 1/2 ozUse like regular glue wait 2 oz HOT STUFFGETS YOU OUT OF THE BUILDING ROOM AND INTO THE ACTION FAST HI-PERFORMANCE ADHESIVES FOR MODELERS AROUND THE WORLD O BOX 836 SIMI CA 93062 522-0062 model keeping original also has problem flying flies like full-scale aircraft Coordinated rudder must used turns otherwise turns appear stilted strange model weighed 9 lb netted wing loading 20 oz per sq ft first takeoff unexpected gave little power get ship rolling added little power get rudder take effect plane suddenly lifted off Later checked position throttle tached engine turning over about 7000 rpm 13-6 Top Flite prop K&B 61 will give maximum 10000 rpm prop flight handles best throttled back slightly about 8000 rpm thought reducing engine size 45 realized additional power bigger engine might help should plane get tight spot has Also putting smaller engine would reduce weight nose aircraft would require addition some lead weight keep correct center-of-gravity Otherwise ship easy fly floats over hot runway like old 40 hp Cub Under conditions necessary feed little down cause ship descend faster rate make wheel landing on-board ignition system asset because rpm too high plane will sink 2000rpm prop acts disk plate causing drag on-board ignition keeps fire going very low speeds Although plane lot work derived great satisfaction meeting challenges provided hope will much Enjoy Sources Classic Models PO Box 681 Melville NY 11746 Documentation Booklet Church Midwing $300 Plans 1-in Church Midwing $800 Experimental Aircraft Association Inc EAA Air Museum Foundation Inc Franklin WI 1931 Flying Glider Manual $200 Caltronic Laboratory 461 5 Cochran Ave PO Box 36356 Los Angeles CA 90036 Catalog Precision Model Engineering Instru ment Componentsfor stainless steel machine screws etc no charge Proctor Ent Corp PO Box 9641 San Diego 92109 Turnbuckles rigging control cable pulleys Send catalog $100 Hobbypoxy Products 32 Pine St Rockaway NJ 07866 Instructions balloon method fiberglassing no charge Coverite 420 Babylon Rd Horsham PA Information covering material send pre addressed stamped envelope LSF Regionals/Pruss Continued page 24 streamlined system experience can benefit us interested system Dave has offered provide rules organizers guide near future next year LSF officers havent yet decided whether 1981 will regional tournament international Because F3B World Championships have two-year program league front office trying set LSF schedule would dovetail F3B Team Selection Program LSF funded tournaments Except contributions made members send level forms league depends contest financial support current officers wish thank members past contributions Any input LSF can made contact ing following Gordon Pearson President 8232 Earhart Road South Lyon MI 48178 Warren Plohr Vice President 5395 Sunset Oval North Olmstead OH 44070 Warren Tiahrt Secretary 7647 Twilight Court Clarkston MI 48016 Keith Finkenbiner Treasurer 907 Barley Drive Wilmington DE 19807 Applicants membership can write directly League Silent Flight PO Box 39068 Chicago IL 60639 Include self-addressed envelope Good Lift RC Scale/Wischers Continued page 27 some additional weight nose balance Usually means batteries must located udner fuel tank long extension cord required have run long extension cords through models some profusion batteries remote servos no ill effects Another trick help balance tail-heavy condi tion use extra large fuel tank nose space permits plane will carrying much fuel needed contests model weighed fuel using fuel ballast can help keep within weight limits risk method temptation use fuel long flight subsequent tall-heavy landing An alternate system would employ two tanks greater effect rear tank feeding ballast tank located near engine Always land ballast tank full Continued page 106 Januafy 1981 99 Carb Needles &Throttle Accessible Engine Running $189i Pre-Paid Orders Pay Shipping KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small MagnetoPoints Sealed Rear Housing V 1 5/8in Six Bolt Aluminum Hub Endorsed Don Godfrey Phone Limited 607 722-1765Warranty Pre-Drilled Props Available Ask About Custom Built KIORITZ Engines Dealer Inquiries Welcome ENGINES BY GIBBS HOBBY RESEARCH Original Developer Factory Trained Authorized Master Service Dealer SPEC FICATIONS 242 CU lfl 397CC 32HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Garb 3 Ring Piston & GIBBS HOBBY & RESEARCH 6195 Hillfield StNW N CANTON OHIO 44720 Phone216499-8854 After6OOPM Accept Visa & Master Card 9 HL GLIDERS KIT iooiirv GASWATCH 70R 3 SATELLITE KITS 1980 catalog 9 NORDIC MR ilIRt COMPETITION GAS FUEL DT TIMERS -$1075 FAI Model Supply P0 BOX 3957TORRANCE CA 90510mOC~IC Aileron flap servos low wing model usually least troublesome can hidden view beneath floor least desirable method concealment raise floor have seen Contest models done effect objectionable pilot sits legs stretched straight forward looking very uncomfortable space between floor instrument panel appears cramped unreal better have aileron pushrod above floor painted flat black minimum visibility Team selection Scale team members have chosen Nats Contestants want eligi bility following years World Champion ship team will need enter models Nats comply FAI rules beginning 1981 odd-numbered years thereafter say plane used Nats must also used World Championships entrant must have least FAI model 1982 WC team selection 1981 Nats means models must meet following specifications 6kg 1322 lb weight fuel wing loading 100 grams per square decimeter 3277 oz per square foot area wing horizontal tail surfaces com bined maximum area 150 sq deci meters 2325 sq foregoing applies both F4C Precision Standoff Sport Scale airplanes Precision Scale entrants 1981 Nats seek eligibility 1982 WC will limited total engine displacement regardless number engines 10cc 61 Cu 1983 engine size limit becomes same Sport Scale 10cc single engine 15cc twins 20cc three Contestants seeking place team will have models judged both static flight AMA rules Kitchener-Waterloo revisited Scale Rally Kitchener Ontario Canada continues growing size though organizers Flying Dutchmen RC Model Club no adver tising 1980 Rally attracted 208 airplanes 53 Giant Scale really one-day event heavy rains dampened activity Saturday Such efficiency organized flight line able make four flights Sunday could have popular frequencies fortunate course six planes air time common previous year seen several unfin ished models reappeared completed condition flown Spectacular impressive eight-engine Hughes Spruce Goose built Steve Gray Frank Evans Tom Dietrich four 05 25 engines half 16-ft wing controlled servo side system proved very effective steering water rudder needed auxiliary levers transmitter ganged together tie-bar throttle control Either side bar can advanced individually whole bar moved control eight engines Movies shown Waterloo University demonstrate very stable flight Goose has now flights prototype always attend KW Rally see out-ofordinary models year rewarded several may hard imagine mere Piper Cub meets expectations -scale J3 former World Champion Bob Nelitz truly outstanding Precision Scale quality too often found Giant Mammoth Scale planes Bobs Cub absolutely precise respect Quadra almost completely hidden detailed four-cylinder dummy Conti nental engine has wired spark plugs accurately formed cylinders heads cooling baffles properly shaped fuel tank filled correct location after removing tank cap has typical wire float gas gauge flying low close exposed wire gives indica tion fuel remaining tiny detail faithfully reproduced including characteristic brace wire terminations tail surfaces Ailerons operated cables extend along lift struts air no question Bob has achieved ultimate realism East Wings Club Memphis MI ac counted 14 high-quality planes rally including Henschel 126A1 Doug Moore collection four Carl Skiba Westland Lysander Fiesler Storch Curtiss Hawk P6-E Gee Bee R- 1 group also included Lockheed Hercules Skip Mast Lockheed Orion Steve Sauger Der Jaeger homebuilt Werner Doser represents portion output single Scale-oriented club As usual Giant Scale class dominated Stars Club Olean NY year number Fokker D-VIII models increased four addition usual squadron Bristol Scouts revealing facts rally 25% participants brought Giant airplanes good indication trend large models NASA membership Bob Underwood president National Association Scale Aeromodelers has requested anyone has paid dues has received membership card news letters should write Bob Underwood 4109 Concord Oaks StLouis MO 63128 John Preston 7012 Elvira Court Falls Church VA 22042 NASA needs know anyone has inadvertently forgotten past Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte Continued page 28 increased deflection elevator causes higher normal acceleration tighter loop causes pushrod bend further causes elevator deflect more. combination conditions vicious cycle can end either wing pushrod failure course situation reversed elevator horn top elevator case inside loops will tighter outside loops Turbulence causes oscillatory loads control surfaces due dynamic magnification factor such loads higher static loads way elevator rudder horn clevis wear out rudder especial ly prone turbulence problems because its control horn short causing higher pushrod forces both neutral deflected positions situation sounds pretty grim doesnt However few good design procedures will alleviate problems prefer use 5/16-in wood dowels pushrods rather -in fiberglass arrow shafts 5/16-in dowel strong enough resist bending due normal loads light enough keep weight down end pushrod drill 1/16-in hole side-to-side about end cut 1/16-in groove hole end along side piece 1/16-in music wire bent 900 just enough wire bend go through dowel 106 Model Aviation
Edition: Model Aviation - 1981/01
Page Numbers: 26, 27, 99, 106
C SCALE Bob & Dolly Wischer EQUIPMENT installations current trend toward larger Scale models problems hiding receiver batteries servos becomes less acute However fact remains kits being built large plane variety hobby shop owner will attest Scale modelers attempt cockpit cabin detailing smaller planes faced very real situation satisfactory installions RC equip ment Finding space really tight interior always easy since weightier components should preferably near center gravity space normally occupiedon prototype human cargo time recent past Sport Scale builders ignored cockpit cabin interiors Anyone peers inside some better examples class should surprised find detailing match what normally found Precision Scale constant improvement up-grading has always us categories aeromodeling Satisfaction ac complishment competitive attitude reasons enough progress direction have told few modelers trend counter-productive will doom Sport Scale contest event does seem happending event continues grow Does seem impossible squeeze receiver servos cockpit along seats instrument panels controls pilots Dont give up too quickly newer small servos will fit tiniest spaces example seat could cover two three servos pilots body could hollow contain receiver Joe McCollum fitted servos inside pilot move arms legs actually flew plane through cockpit controls Volksplane Concealing wiring could real problem area can bundled space under servos extension cords passing beneath floor World War II military planes blessed small cockpit volume compated total fuselage interior space normally occupied fuel tanks armament can used equipment Civil types need careful plan ning squeeze equipment interior too easily visible through large cockpit open ings through canopies windows doors throttle pushrod made heavy flexible cable needs concealed cockpit sidewalls narrow fuselage rod can quite easily connected directly engine throttle wide fuselages such side-byside seating arrangement bellcrank lever may needed forward firewall bring linear motion alignment engine throttle An alternative method places throttle servo engine compartment exten sion cord back receiver servo mounted close vibration source requires careful shock mounting well protection engine oil have made practice use engines carburetor throttle-stop idling transmiters throttle-lever rearmost travel position used idle move transmitter throttle trim lever toward idle position realistic engine stop end flight modelers have asked about location receiver antenna models visible antenna Scale model eyesore prefer run antenna internally down fuselage bottom extends out fuselage through small hole rear knot keeps retracting tiny knot almost 26 Model Aviation An exceptional model Bob Nelitz 1/a-scale Piper J-3 Cub has 1 2-ft span Its Quadra engine almost invisible Photo upper left gives overall im pression shows functional bungee landing gear Picture upper right shows detail scale Continental engine scale Sensenich propwith metal leading edges Model flies prop Note wired spark plugs authentic induction system hoses clamps retaining clips cowling safety-wire propmounting bolts Photo lower left lets us see scale pilot leather jacket magneto switch above head Throttle quadrants fuel valve have correct labels Piper nameplate fuselage side has raised lettering Picture lower right gives interior detailupholstered seat map pocket seat belt scuff protection door-edge invisible models use stainless steel control line cable operate tail surfaces place pushrods save weight preserve scale appearance wires fastened ends plywood operating levers control horns though antenna close proximity wires may touch has no radio interference loss seat baggage compartment standard servo tray too difficult hide resort plywood servo rails maximum strength minimum size laminate two 1/16-in ply strips using white glue adhesive under pressure form rail Very rare Scale plane doesnt need Continued page 99 January 1981 27 LI Moore built Henschei 1 26A1 Dennis Bryants plans its scale isl% structure covered paperand finished dope talc followed Aero Gloss Webra 61 Blackhead powers Photo rear cockpit has gunner camera hand Canopy slides rails Note scuffed foothoids fuselage side range Royal Kraft equipment very likely due wires being anchored wood levers rather metal steel wires cross close proximity slip piece insulating tube over held place drop adhesive prevent rubbing wires being RF noise source mount servos concealed manner beneath gettingIan Waterloo Scale Rally Focke190 D9 Platt kit Model finished K&B Superpoxy over Super Coverite mis consosaasea lY atalina built trom HM plans Louis Botari pair OS Max 15s power 60-in-span model Louis flies Rose City Model Flyers Weiland Ontario Canada Werner Doser Michigans East Wings club model scratch built Bruce Lund plans Although spans five ft 1/4-scale Model finished dope over Super Coverite Spruce Goose has ihts th____ ago Hughes spans 16 ft powered eight - sound beyond compare structure foam covered balsa fuselage 1/16-in veneer wings BEGINNER TO PRO ES HOT STUFF JUST RIGHT FOR YOU HOT STUFF ORIGINAL CLEAR FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec THIS IS THE ONE THAT STARTED IT ALL 1/4 1/2 2 oz EXCLUSIVE VISIBLE FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec HOT STUFF ELU LINEE t4E~ HOT STUFF GAP FILLING FILLETING POSITIONABLE HIGH VISCOSITY-TIMED BOND 10 25 sec 1/2 ozUse like regular glue wait 2 oz HOT STUFFGETS YOU OUT OF THE BUILDING ROOM AND INTO THE ACTION FAST HI-PERFORMANCE ADHESIVES FOR MODELERS AROUND THE WORLD O BOX 836 SIMI CA 93062 522-0062 model keeping original also has problem flying flies like full-scale aircraft Coordinated rudder must used turns otherwise turns appear stilted strange model weighed 9 lb netted wing loading 20 oz per sq ft first takeoff unexpected gave little power get ship rolling added little power get rudder take effect plane suddenly lifted off Later checked position throttle tached engine turning over about 7000 rpm 13-6 Top Flite prop K&B 61 will give maximum 10000 rpm prop flight handles best throttled back slightly about 8000 rpm thought reducing engine size 45 realized additional power bigger engine might help should plane get tight spot has Also putting smaller engine would reduce weight nose aircraft would require addition some lead weight keep correct center-of-gravity Otherwise ship easy fly floats over hot runway like old 40 hp Cub Under conditions necessary feed little down cause ship descend faster rate make wheel landing on-board ignition system asset because rpm too high plane will sink 2000rpm prop acts disk plate causing drag on-board ignition keeps fire going very low speeds Although plane lot work derived great satisfaction meeting challenges provided hope will much Enjoy Sources Classic Models PO Box 681 Melville NY 11746 Documentation Booklet Church Midwing $300 Plans 1-in Church Midwing $800 Experimental Aircraft Association Inc EAA Air Museum Foundation Inc Franklin WI 1931 Flying Glider Manual $200 Caltronic Laboratory 461 5 Cochran Ave PO Box 36356 Los Angeles CA 90036 Catalog Precision Model Engineering Instru ment Componentsfor stainless steel machine screws etc no charge Proctor Ent Corp PO Box 9641 San Diego 92109 Turnbuckles rigging control cable pulleys Send catalog $100 Hobbypoxy Products 32 Pine St Rockaway NJ 07866 Instructions balloon method fiberglassing no charge Coverite 420 Babylon Rd Horsham PA Information covering material send pre addressed stamped envelope LSF Regionals/Pruss Continued page 24 streamlined system experience can benefit us interested system Dave has offered provide rules organizers guide near future next year LSF officers havent yet decided whether 1981 will regional tournament international Because F3B World Championships have two-year program league front office trying set LSF schedule would dovetail F3B Team Selection Program LSF funded tournaments Except contributions made members send level forms league depends contest financial support current officers wish thank members past contributions Any input LSF can made contact ing following Gordon Pearson President 8232 Earhart Road South Lyon MI 48178 Warren Plohr Vice President 5395 Sunset Oval North Olmstead OH 44070 Warren Tiahrt Secretary 7647 Twilight Court Clarkston MI 48016 Keith Finkenbiner Treasurer 907 Barley Drive Wilmington DE 19807 Applicants membership can write directly League Silent Flight PO Box 39068 Chicago IL 60639 Include self-addressed envelope Good Lift RC Scale/Wischers Continued page 27 some additional weight nose balance Usually means batteries must located udner fuel tank long extension cord required have run long extension cords through models some profusion batteries remote servos no ill effects Another trick help balance tail-heavy condi tion use extra large fuel tank nose space permits plane will carrying much fuel needed contests model weighed fuel using fuel ballast can help keep within weight limits risk method temptation use fuel long flight subsequent tall-heavy landing An alternate system would employ two tanks greater effect rear tank feeding ballast tank located near engine Always land ballast tank full Continued page 106 Januafy 1981 99 Carb Needles &Throttle Accessible Engine Running $189i Pre-Paid Orders Pay Shipping KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small MagnetoPoints Sealed Rear Housing V 1 5/8in Six Bolt Aluminum Hub Endorsed Don Godfrey Phone Limited 607 722-1765Warranty Pre-Drilled Props Available Ask About Custom Built KIORITZ Engines Dealer Inquiries Welcome ENGINES BY GIBBS HOBBY RESEARCH Original Developer Factory Trained Authorized Master Service Dealer SPEC FICATIONS 242 CU lfl 397CC 32HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Garb 3 Ring Piston & GIBBS HOBBY & RESEARCH 6195 Hillfield StNW N CANTON OHIO 44720 Phone216499-8854 After6OOPM Accept Visa & Master Card 9 HL GLIDERS KIT iooiirv GASWATCH 70R 3 SATELLITE KITS 1980 catalog 9 NORDIC MR ilIRt COMPETITION GAS FUEL DT TIMERS -$1075 FAI Model Supply P0 BOX 3957TORRANCE CA 90510mOC~IC Aileron flap servos low wing model usually least troublesome can hidden view beneath floor least desirable method concealment raise floor have seen Contest models done effect objectionable pilot sits legs stretched straight forward looking very uncomfortable space between floor instrument panel appears cramped unreal better have aileron pushrod above floor painted flat black minimum visibility Team selection Scale team members have chosen Nats Contestants want eligi bility following years World Champion ship team will need enter models Nats comply FAI rules beginning 1981 odd-numbered years thereafter say plane used Nats must also used World Championships entrant must have least FAI model 1982 WC team selection 1981 Nats means models must meet following specifications 6kg 1322 lb weight fuel wing loading 100 grams per square decimeter 3277 oz per square foot area wing horizontal tail surfaces com bined maximum area 150 sq deci meters 2325 sq foregoing applies both F4C Precision Standoff Sport Scale airplanes Precision Scale entrants 1981 Nats seek eligibility 1982 WC will limited total engine displacement regardless number engines 10cc 61 Cu 1983 engine size limit becomes same Sport Scale 10cc single engine 15cc twins 20cc three Contestants seeking place team will have models judged both static flight AMA rules Kitchener-Waterloo revisited Scale Rally Kitchener Ontario Canada continues growing size though organizers Flying Dutchmen RC Model Club no adver tising 1980 Rally attracted 208 airplanes 53 Giant Scale really one-day event heavy rains dampened activity Saturday Such efficiency organized flight line able make four flights Sunday could have popular frequencies fortunate course six planes air time common previous year seen several unfin ished models reappeared completed condition flown Spectacular impressive eight-engine Hughes Spruce Goose built Steve Gray Frank Evans Tom Dietrich four 05 25 engines half 16-ft wing controlled servo side system proved very effective steering water rudder needed auxiliary levers transmitter ganged together tie-bar throttle control Either side bar can advanced individually whole bar moved control eight engines Movies shown Waterloo University demonstrate very stable flight Goose has now flights prototype always attend KW Rally see out-ofordinary models year rewarded several may hard imagine mere Piper Cub meets expectations -scale J3 former World Champion Bob Nelitz truly outstanding Precision Scale quality too often found Giant Mammoth Scale planes Bobs Cub absolutely precise respect Quadra almost completely hidden detailed four-cylinder dummy Conti nental engine has wired spark plugs accurately formed cylinders heads cooling baffles properly shaped fuel tank filled correct location after removing tank cap has typical wire float gas gauge flying low close exposed wire gives indica tion fuel remaining tiny detail faithfully reproduced including characteristic brace wire terminations tail surfaces Ailerons operated cables extend along lift struts air no question Bob has achieved ultimate realism East Wings Club Memphis MI ac counted 14 high-quality planes rally including Henschel 126A1 Doug Moore collection four Carl Skiba Westland Lysander Fiesler Storch Curtiss Hawk P6-E Gee Bee R- 1 group also included Lockheed Hercules Skip Mast Lockheed Orion Steve Sauger Der Jaeger homebuilt Werner Doser represents portion output single Scale-oriented club As usual Giant Scale class dominated Stars Club Olean NY year number Fokker D-VIII models increased four addition usual squadron Bristol Scouts revealing facts rally 25% participants brought Giant airplanes good indication trend large models NASA membership Bob Underwood president National Association Scale Aeromodelers has requested anyone has paid dues has received membership card news letters should write Bob Underwood 4109 Concord Oaks StLouis MO 63128 John Preston 7012 Elvira Court Falls Church VA 22042 NASA needs know anyone has inadvertently forgotten past Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte Continued page 28 increased deflection elevator causes higher normal acceleration tighter loop causes pushrod bend further causes elevator deflect more. combination conditions vicious cycle can end either wing pushrod failure course situation reversed elevator horn top elevator case inside loops will tighter outside loops Turbulence causes oscillatory loads control surfaces due dynamic magnification factor such loads higher static loads way elevator rudder horn clevis wear out rudder especial ly prone turbulence problems because its control horn short causing higher pushrod forces both neutral deflected positions situation sounds pretty grim doesnt However few good design procedures will alleviate problems prefer use 5/16-in wood dowels pushrods rather -in fiberglass arrow shafts 5/16-in dowel strong enough resist bending due normal loads light enough keep weight down end pushrod drill 1/16-in hole side-to-side about end cut 1/16-in groove hole end along side piece 1/16-in music wire bent 900 just enough wire bend go through dowel 106 Model Aviation
Edition: Model Aviation - 1981/01
Page Numbers: 26, 27, 99, 106
C SCALE Bob & Dolly Wischer EQUIPMENT installations current trend toward larger Scale models problems hiding receiver batteries servos becomes less acute However fact remains kits being built large plane variety hobby shop owner will attest Scale modelers attempt cockpit cabin detailing smaller planes faced very real situation satisfactory installions RC equip ment Finding space really tight interior always easy since weightier components should preferably near center gravity space normally occupiedon prototype human cargo time recent past Sport Scale builders ignored cockpit cabin interiors Anyone peers inside some better examples class should surprised find detailing match what normally found Precision Scale constant improvement up-grading has always us categories aeromodeling Satisfaction ac complishment competitive attitude reasons enough progress direction have told few modelers trend counter-productive will doom Sport Scale contest event does seem happending event continues grow Does seem impossible squeeze receiver servos cockpit along seats instrument panels controls pilots Dont give up too quickly newer small servos will fit tiniest spaces example seat could cover two three servos pilots body could hollow contain receiver Joe McCollum fitted servos inside pilot move arms legs actually flew plane through cockpit controls Volksplane Concealing wiring could real problem area can bundled space under servos extension cords passing beneath floor World War II military planes blessed small cockpit volume compated total fuselage interior space normally occupied fuel tanks armament can used equipment Civil types need careful plan ning squeeze equipment interior too easily visible through large cockpit open ings through canopies windows doors throttle pushrod made heavy flexible cable needs concealed cockpit sidewalls narrow fuselage rod can quite easily connected directly engine throttle wide fuselages such side-byside seating arrangement bellcrank lever may needed forward firewall bring linear motion alignment engine throttle An alternative method places throttle servo engine compartment exten sion cord back receiver servo mounted close vibration source requires careful shock mounting well protection engine oil have made practice use engines carburetor throttle-stop idling transmiters throttle-lever rearmost travel position used idle move transmitter throttle trim lever toward idle position realistic engine stop end flight modelers have asked about location receiver antenna models visible antenna Scale model eyesore prefer run antenna internally down fuselage bottom extends out fuselage through small hole rear knot keeps retracting tiny knot almost 26 Model Aviation An exceptional model Bob Nelitz 1/a-scale Piper J-3 Cub has 1 2-ft span Its Quadra engine almost invisible Photo upper left gives overall im pression shows functional bungee landing gear Picture upper right shows detail scale Continental engine scale Sensenich propwith metal leading edges Model flies prop Note wired spark plugs authentic induction system hoses clamps retaining clips cowling safety-wire propmounting bolts Photo lower left lets us see scale pilot leather jacket magneto switch above head Throttle quadrants fuel valve have correct labels Piper nameplate fuselage side has raised lettering Picture lower right gives interior detailupholstered seat map pocket seat belt scuff protection door-edge invisible models use stainless steel control line cable operate tail surfaces place pushrods save weight preserve scale appearance wires fastened ends plywood operating levers control horns though antenna close proximity wires may touch has no radio interference loss seat baggage compartment standard servo tray too difficult hide resort plywood servo rails maximum strength minimum size laminate two 1/16-in ply strips using white glue adhesive under pressure form rail Very rare Scale plane doesnt need Continued page 99 January 1981 27 LI Moore built Henschei 1 26A1 Dennis Bryants plans its scale isl% structure covered paperand finished dope talc followed Aero Gloss Webra 61 Blackhead powers Photo rear cockpit has gunner camera hand Canopy slides rails Note scuffed foothoids fuselage side range Royal Kraft equipment very likely due wires being anchored wood levers rather metal steel wires cross close proximity slip piece insulating tube over held place drop adhesive prevent rubbing wires being RF noise source mount servos concealed manner beneath gettingIan Waterloo Scale Rally Focke190 D9 Platt kit Model finished K&B Superpoxy over Super Coverite mis consosaasea lY atalina built trom HM plans Louis Botari pair OS Max 15s power 60-in-span model Louis flies Rose City Model Flyers Weiland Ontario Canada Werner Doser Michigans East Wings club model scratch built Bruce Lund plans Although spans five ft 1/4-scale Model finished dope over Super Coverite Spruce Goose has ihts th____ ago Hughes spans 16 ft powered eight - sound beyond compare structure foam covered balsa fuselage 1/16-in veneer wings BEGINNER TO PRO ES HOT STUFF JUST RIGHT FOR YOU HOT STUFF ORIGINAL CLEAR FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec THIS IS THE ONE THAT STARTED IT ALL 1/4 1/2 2 oz EXCLUSIVE VISIBLE FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec HOT STUFF ELU LINEE t4E~ HOT STUFF GAP FILLING FILLETING POSITIONABLE HIGH VISCOSITY-TIMED BOND 10 25 sec 1/2 ozUse like regular glue wait 2 oz HOT STUFFGETS YOU OUT OF THE BUILDING ROOM AND INTO THE ACTION FAST HI-PERFORMANCE ADHESIVES FOR MODELERS AROUND THE WORLD O BOX 836 SIMI CA 93062 522-0062 model keeping original also has problem flying flies like full-scale aircraft Coordinated rudder must used turns otherwise turns appear stilted strange model weighed 9 lb netted wing loading 20 oz per sq ft first takeoff unexpected gave little power get ship rolling added little power get rudder take effect plane suddenly lifted off Later checked position throttle tached engine turning over about 7000 rpm 13-6 Top Flite prop K&B 61 will give maximum 10000 rpm prop flight handles best throttled back slightly about 8000 rpm thought reducing engine size 45 realized additional power bigger engine might help should plane get tight spot has Also putting smaller engine would reduce weight nose aircraft would require addition some lead weight keep correct center-of-gravity Otherwise ship easy fly floats over hot runway like old 40 hp Cub Under conditions necessary feed little down cause ship descend faster rate make wheel landing on-board ignition system asset because rpm too high plane will sink 2000rpm prop acts disk plate causing drag on-board ignition keeps fire going very low speeds Although plane lot work derived great satisfaction meeting challenges provided hope will much Enjoy Sources Classic Models PO Box 681 Melville NY 11746 Documentation Booklet Church Midwing $300 Plans 1-in Church Midwing $800 Experimental Aircraft Association Inc EAA Air Museum Foundation Inc Franklin WI 1931 Flying Glider Manual $200 Caltronic Laboratory 461 5 Cochran Ave PO Box 36356 Los Angeles CA 90036 Catalog Precision Model Engineering Instru ment Componentsfor stainless steel machine screws etc no charge Proctor Ent Corp PO Box 9641 San Diego 92109 Turnbuckles rigging control cable pulleys Send catalog $100 Hobbypoxy Products 32 Pine St Rockaway NJ 07866 Instructions balloon method fiberglassing no charge Coverite 420 Babylon Rd Horsham PA Information covering material send pre addressed stamped envelope LSF Regionals/Pruss Continued page 24 streamlined system experience can benefit us interested system Dave has offered provide rules organizers guide near future next year LSF officers havent yet decided whether 1981 will regional tournament international Because F3B World Championships have two-year program league front office trying set LSF schedule would dovetail F3B Team Selection Program LSF funded tournaments Except contributions made members send level forms league depends contest financial support current officers wish thank members past contributions Any input LSF can made contact ing following Gordon Pearson President 8232 Earhart Road South Lyon MI 48178 Warren Plohr Vice President 5395 Sunset Oval North Olmstead OH 44070 Warren Tiahrt Secretary 7647 Twilight Court Clarkston MI 48016 Keith Finkenbiner Treasurer 907 Barley Drive Wilmington DE 19807 Applicants membership can write directly League Silent Flight PO Box 39068 Chicago IL 60639 Include self-addressed envelope Good Lift RC Scale/Wischers Continued page 27 some additional weight nose balance Usually means batteries must located udner fuel tank long extension cord required have run long extension cords through models some profusion batteries remote servos no ill effects Another trick help balance tail-heavy condi tion use extra large fuel tank nose space permits plane will carrying much fuel needed contests model weighed fuel using fuel ballast can help keep within weight limits risk method temptation use fuel long flight subsequent tall-heavy landing An alternate system would employ two tanks greater effect rear tank feeding ballast tank located near engine Always land ballast tank full Continued page 106 Januafy 1981 99 Carb Needles &Throttle Accessible Engine Running $189i Pre-Paid Orders Pay Shipping KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small MagnetoPoints Sealed Rear Housing V 1 5/8in Six Bolt Aluminum Hub Endorsed Don Godfrey Phone Limited 607 722-1765Warranty Pre-Drilled Props Available Ask About Custom Built KIORITZ Engines Dealer Inquiries Welcome ENGINES BY GIBBS HOBBY RESEARCH Original Developer Factory Trained Authorized Master Service Dealer SPEC FICATIONS 242 CU lfl 397CC 32HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Garb 3 Ring Piston & GIBBS HOBBY & RESEARCH 6195 Hillfield StNW N CANTON OHIO 44720 Phone216499-8854 After6OOPM Accept Visa & Master Card 9 HL GLIDERS KIT iooiirv GASWATCH 70R 3 SATELLITE KITS 1980 catalog 9 NORDIC MR ilIRt COMPETITION GAS FUEL DT TIMERS -$1075 FAI Model Supply P0 BOX 3957TORRANCE CA 90510mOC~IC Aileron flap servos low wing model usually least troublesome can hidden view beneath floor least desirable method concealment raise floor have seen Contest models done effect objectionable pilot sits legs stretched straight forward looking very uncomfortable space between floor instrument panel appears cramped unreal better have aileron pushrod above floor painted flat black minimum visibility Team selection Scale team members have chosen Nats Contestants want eligi bility following years World Champion ship team will need enter models Nats comply FAI rules beginning 1981 odd-numbered years thereafter say plane used Nats must also used World Championships entrant must have least FAI model 1982 WC team selection 1981 Nats means models must meet following specifications 6kg 1322 lb weight fuel wing loading 100 grams per square decimeter 3277 oz per square foot area wing horizontal tail surfaces com bined maximum area 150 sq deci meters 2325 sq foregoing applies both F4C Precision Standoff Sport Scale airplanes Precision Scale entrants 1981 Nats seek eligibility 1982 WC will limited total engine displacement regardless number engines 10cc 61 Cu 1983 engine size limit becomes same Sport Scale 10cc single engine 15cc twins 20cc three Contestants seeking place team will have models judged both static flight AMA rules Kitchener-Waterloo revisited Scale Rally Kitchener Ontario Canada continues growing size though organizers Flying Dutchmen RC Model Club no adver tising 1980 Rally attracted 208 airplanes 53 Giant Scale really one-day event heavy rains dampened activity Saturday Such efficiency organized flight line able make four flights Sunday could have popular frequencies fortunate course six planes air time common previous year seen several unfin ished models reappeared completed condition flown Spectacular impressive eight-engine Hughes Spruce Goose built Steve Gray Frank Evans Tom Dietrich four 05 25 engines half 16-ft wing controlled servo side system proved very effective steering water rudder needed auxiliary levers transmitter ganged together tie-bar throttle control Either side bar can advanced individually whole bar moved control eight engines Movies shown Waterloo University demonstrate very stable flight Goose has now flights prototype always attend KW Rally see out-ofordinary models year rewarded several may hard imagine mere Piper Cub meets expectations -scale J3 former World Champion Bob Nelitz truly outstanding Precision Scale quality too often found Giant Mammoth Scale planes Bobs Cub absolutely precise respect Quadra almost completely hidden detailed four-cylinder dummy Conti nental engine has wired spark plugs accurately formed cylinders heads cooling baffles properly shaped fuel tank filled correct location after removing tank cap has typical wire float gas gauge flying low close exposed wire gives indica tion fuel remaining tiny detail faithfully reproduced including characteristic brace wire terminations tail surfaces Ailerons operated cables extend along lift struts air no question Bob has achieved ultimate realism East Wings Club Memphis MI ac counted 14 high-quality planes rally including Henschel 126A1 Doug Moore collection four Carl Skiba Westland Lysander Fiesler Storch Curtiss Hawk P6-E Gee Bee R- 1 group also included Lockheed Hercules Skip Mast Lockheed Orion Steve Sauger Der Jaeger homebuilt Werner Doser represents portion output single Scale-oriented club As usual Giant Scale class dominated Stars Club Olean NY year number Fokker D-VIII models increased four addition usual squadron Bristol Scouts revealing facts rally 25% participants brought Giant airplanes good indication trend large models NASA membership Bob Underwood president National Association Scale Aeromodelers has requested anyone has paid dues has received membership card news letters should write Bob Underwood 4109 Concord Oaks StLouis MO 63128 John Preston 7012 Elvira Court Falls Church VA 22042 NASA needs know anyone has inadvertently forgotten past Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte Continued page 28 increased deflection elevator causes higher normal acceleration tighter loop causes pushrod bend further causes elevator deflect more. combination conditions vicious cycle can end either wing pushrod failure course situation reversed elevator horn top elevator case inside loops will tighter outside loops Turbulence causes oscillatory loads control surfaces due dynamic magnification factor such loads higher static loads way elevator rudder horn clevis wear out rudder especial ly prone turbulence problems because its control horn short causing higher pushrod forces both neutral deflected positions situation sounds pretty grim doesnt However few good design procedures will alleviate problems prefer use 5/16-in wood dowels pushrods rather -in fiberglass arrow shafts 5/16-in dowel strong enough resist bending due normal loads light enough keep weight down end pushrod drill 1/16-in hole side-to-side about end cut 1/16-in groove hole end along side piece 1/16-in music wire bent 900 just enough wire bend go through dowel 106 Model Aviation
Edition: Model Aviation - 1981/01
Page Numbers: 26, 27, 99, 106
C SCALE Bob & Dolly Wischer EQUIPMENT installations current trend toward larger Scale models problems hiding receiver batteries servos becomes less acute However fact remains kits being built large plane variety hobby shop owner will attest Scale modelers attempt cockpit cabin detailing smaller planes faced very real situation satisfactory installions RC equip ment Finding space really tight interior always easy since weightier components should preferably near center gravity space normally occupiedon prototype human cargo time recent past Sport Scale builders ignored cockpit cabin interiors Anyone peers inside some better examples class should surprised find detailing match what normally found Precision Scale constant improvement up-grading has always us categories aeromodeling Satisfaction ac complishment competitive attitude reasons enough progress direction have told few modelers trend counter-productive will doom Sport Scale contest event does seem happending event continues grow Does seem impossible squeeze receiver servos cockpit along seats instrument panels controls pilots Dont give up too quickly newer small servos will fit tiniest spaces example seat could cover two three servos pilots body could hollow contain receiver Joe McCollum fitted servos inside pilot move arms legs actually flew plane through cockpit controls Volksplane Concealing wiring could real problem area can bundled space under servos extension cords passing beneath floor World War II military planes blessed small cockpit volume compated total fuselage interior space normally occupied fuel tanks armament can used equipment Civil types need careful plan ning squeeze equipment interior too easily visible through large cockpit open ings through canopies windows doors throttle pushrod made heavy flexible cable needs concealed cockpit sidewalls narrow fuselage rod can quite easily connected directly engine throttle wide fuselages such side-byside seating arrangement bellcrank lever may needed forward firewall bring linear motion alignment engine throttle An alternative method places throttle servo engine compartment exten sion cord back receiver servo mounted close vibration source requires careful shock mounting well protection engine oil have made practice use engines carburetor throttle-stop idling transmiters throttle-lever rearmost travel position used idle move transmitter throttle trim lever toward idle position realistic engine stop end flight modelers have asked about location receiver antenna models visible antenna Scale model eyesore prefer run antenna internally down fuselage bottom extends out fuselage through small hole rear knot keeps retracting tiny knot almost 26 Model Aviation An exceptional model Bob Nelitz 1/a-scale Piper J-3 Cub has 1 2-ft span Its Quadra engine almost invisible Photo upper left gives overall im pression shows functional bungee landing gear Picture upper right shows detail scale Continental engine scale Sensenich propwith metal leading edges Model flies prop Note wired spark plugs authentic induction system hoses clamps retaining clips cowling safety-wire propmounting bolts Photo lower left lets us see scale pilot leather jacket magneto switch above head Throttle quadrants fuel valve have correct labels Piper nameplate fuselage side has raised lettering Picture lower right gives interior detailupholstered seat map pocket seat belt scuff protection door-edge invisible models use stainless steel control line cable operate tail surfaces place pushrods save weight preserve scale appearance wires fastened ends plywood operating levers control horns though antenna close proximity wires may touch has no radio interference loss seat baggage compartment standard servo tray too difficult hide resort plywood servo rails maximum strength minimum size laminate two 1/16-in ply strips using white glue adhesive under pressure form rail Very rare Scale plane doesnt need Continued page 99 January 1981 27 LI Moore built Henschei 1 26A1 Dennis Bryants plans its scale isl% structure covered paperand finished dope talc followed Aero Gloss Webra 61 Blackhead powers Photo rear cockpit has gunner camera hand Canopy slides rails Note scuffed foothoids fuselage side range Royal Kraft equipment very likely due wires being anchored wood levers rather metal steel wires cross close proximity slip piece insulating tube over held place drop adhesive prevent rubbing wires being RF noise source mount servos concealed manner beneath gettingIan Waterloo Scale Rally Focke190 D9 Platt kit Model finished K&B Superpoxy over Super Coverite mis consosaasea lY atalina built trom HM plans Louis Botari pair OS Max 15s power 60-in-span model Louis flies Rose City Model Flyers Weiland Ontario Canada Werner Doser Michigans East Wings club model scratch built Bruce Lund plans Although spans five ft 1/4-scale Model finished dope over Super Coverite Spruce Goose has ihts th____ ago Hughes spans 16 ft powered eight - sound beyond compare structure foam covered balsa fuselage 1/16-in veneer wings BEGINNER TO PRO ES HOT STUFF JUST RIGHT FOR YOU HOT STUFF ORIGINAL CLEAR FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec THIS IS THE ONE THAT STARTED IT ALL 1/4 1/2 2 oz EXCLUSIVE VISIBLE FORMULA LOW VISCOSITY-DEEP PENETRATION INSTANT BOND RATE 3 10 sec HOT STUFF ELU LINEE t4E~ HOT STUFF GAP FILLING FILLETING POSITIONABLE HIGH VISCOSITY-TIMED BOND 10 25 sec 1/2 ozUse like regular glue wait 2 oz HOT STUFFGETS YOU OUT OF THE BUILDING ROOM AND INTO THE ACTION FAST HI-PERFORMANCE ADHESIVES FOR MODELERS AROUND THE WORLD O BOX 836 SIMI CA 93062 522-0062 model keeping original also has problem flying flies like full-scale aircraft Coordinated rudder must used turns otherwise turns appear stilted strange model weighed 9 lb netted wing loading 20 oz per sq ft first takeoff unexpected gave little power get ship rolling added little power get rudder take effect plane suddenly lifted off Later checked position throttle tached engine turning over about 7000 rpm 13-6 Top Flite prop K&B 61 will give maximum 10000 rpm prop flight handles best throttled back slightly about 8000 rpm thought reducing engine size 45 realized additional power bigger engine might help should plane get tight spot has Also putting smaller engine would reduce weight nose aircraft would require addition some lead weight keep correct center-of-gravity Otherwise ship easy fly floats over hot runway like old 40 hp Cub Under conditions necessary feed little down cause ship descend faster rate make wheel landing on-board ignition system asset because rpm too high plane will sink 2000rpm prop acts disk plate causing drag on-board ignition keeps fire going very low speeds Although plane lot work derived great satisfaction meeting challenges provided hope will much Enjoy Sources Classic Models PO Box 681 Melville NY 11746 Documentation Booklet Church Midwing $300 Plans 1-in Church Midwing $800 Experimental Aircraft Association Inc EAA Air Museum Foundation Inc Franklin WI 1931 Flying Glider Manual $200 Caltronic Laboratory 461 5 Cochran Ave PO Box 36356 Los Angeles CA 90036 Catalog Precision Model Engineering Instru ment Componentsfor stainless steel machine screws etc no charge Proctor Ent Corp PO Box 9641 San Diego 92109 Turnbuckles rigging control cable pulleys Send catalog $100 Hobbypoxy Products 32 Pine St Rockaway NJ 07866 Instructions balloon method fiberglassing no charge Coverite 420 Babylon Rd Horsham PA Information covering material send pre addressed stamped envelope LSF Regionals/Pruss Continued page 24 streamlined system experience can benefit us interested system Dave has offered provide rules organizers guide near future next year LSF officers havent yet decided whether 1981 will regional tournament international Because F3B World Championships have two-year program league front office trying set LSF schedule would dovetail F3B Team Selection Program LSF funded tournaments Except contributions made members send level forms league depends contest financial support current officers wish thank members past contributions Any input LSF can made contact ing following Gordon Pearson President 8232 Earhart Road South Lyon MI 48178 Warren Plohr Vice President 5395 Sunset Oval North Olmstead OH 44070 Warren Tiahrt Secretary 7647 Twilight Court Clarkston MI 48016 Keith Finkenbiner Treasurer 907 Barley Drive Wilmington DE 19807 Applicants membership can write directly League Silent Flight PO Box 39068 Chicago IL 60639 Include self-addressed envelope Good Lift RC Scale/Wischers Continued page 27 some additional weight nose balance Usually means batteries must located udner fuel tank long extension cord required have run long extension cords through models some profusion batteries remote servos no ill effects Another trick help balance tail-heavy condi tion use extra large fuel tank nose space permits plane will carrying much fuel needed contests model weighed fuel using fuel ballast can help keep within weight limits risk method temptation use fuel long flight subsequent tall-heavy landing An alternate system would employ two tanks greater effect rear tank feeding ballast tank located near engine Always land ballast tank full Continued page 106 Januafy 1981 99 Carb Needles &Throttle Accessible Engine Running $189i Pre-Paid Orders Pay Shipping KIORITZ Deep Fins Optimum Cooling 21/4 Flywheel Small MagnetoPoints Sealed Rear Housing V 1 5/8in Six Bolt Aluminum Hub Endorsed Don Godfrey Phone Limited 607 722-1765Warranty Pre-Drilled Props Available Ask About Custom Built KIORITZ Engines Dealer Inquiries Welcome ENGINES BY GIBBS HOBBY RESEARCH Original Developer Factory Trained Authorized Master Service Dealer SPEC FICATIONS 242 CU lfl 397CC 32HP 8000 rpm Weight 61/2 lb BaII Bearings Crank Caged Rollers Rod Piston Pin Walbro Pump Garb 3 Ring Piston & GIBBS HOBBY & RESEARCH 6195 Hillfield StNW N CANTON OHIO 44720 Phone216499-8854 After6OOPM Accept Visa & Master Card 9 HL GLIDERS KIT iooiirv GASWATCH 70R 3 SATELLITE KITS 1980 catalog 9 NORDIC MR ilIRt COMPETITION GAS FUEL DT TIMERS -$1075 FAI Model Supply P0 BOX 3957TORRANCE CA 90510mOC~IC Aileron flap servos low wing model usually least troublesome can hidden view beneath floor least desirable method concealment raise floor have seen Contest models done effect objectionable pilot sits legs stretched straight forward looking very uncomfortable space between floor instrument panel appears cramped unreal better have aileron pushrod above floor painted flat black minimum visibility Team selection Scale team members have chosen Nats Contestants want eligi bility following years World Champion ship team will need enter models Nats comply FAI rules beginning 1981 odd-numbered years thereafter say plane used Nats must also used World Championships entrant must have least FAI model 1982 WC team selection 1981 Nats means models must meet following specifications 6kg 1322 lb weight fuel wing loading 100 grams per square decimeter 3277 oz per square foot area wing horizontal tail surfaces com bined maximum area 150 sq deci meters 2325 sq foregoing applies both F4C Precision Standoff Sport Scale airplanes Precision Scale entrants 1981 Nats seek eligibility 1982 WC will limited total engine displacement regardless number engines 10cc 61 Cu 1983 engine size limit becomes same Sport Scale 10cc single engine 15cc twins 20cc three Contestants seeking place team will have models judged both static flight AMA rules Kitchener-Waterloo revisited Scale Rally Kitchener Ontario Canada continues growing size though organizers Flying Dutchmen RC Model Club no adver tising 1980 Rally attracted 208 airplanes 53 Giant Scale really one-day event heavy rains dampened activity Saturday Such efficiency organized flight line able make four flights Sunday could have popular frequencies fortunate course six planes air time common previous year seen several unfin ished models reappeared completed condition flown Spectacular impressive eight-engine Hughes Spruce Goose built Steve Gray Frank Evans Tom Dietrich four 05 25 engines half 16-ft wing controlled servo side system proved very effective steering water rudder needed auxiliary levers transmitter ganged together tie-bar throttle control Either side bar can advanced individually whole bar moved control eight engines Movies shown Waterloo University demonstrate very stable flight Goose has now flights prototype always attend KW Rally see out-ofordinary models year rewarded several may hard imagine mere Piper Cub meets expectations -scale J3 former World Champion Bob Nelitz truly outstanding Precision Scale quality too often found Giant Mammoth Scale planes Bobs Cub absolutely precise respect Quadra almost completely hidden detailed four-cylinder dummy Conti nental engine has wired spark plugs accurately formed cylinders heads cooling baffles properly shaped fuel tank filled correct location after removing tank cap has typical wire float gas gauge flying low close exposed wire gives indica tion fuel remaining tiny detail faithfully reproduced including characteristic brace wire terminations tail surfaces Ailerons operated cables extend along lift struts air no question Bob has achieved ultimate realism East Wings Club Memphis MI ac counted 14 high-quality planes rally including Henschel 126A1 Doug Moore collection four Carl Skiba Westland Lysander Fiesler Storch Curtiss Hawk P6-E Gee Bee R- 1 group also included Lockheed Hercules Skip Mast Lockheed Orion Steve Sauger Der Jaeger homebuilt Werner Doser represents portion output single Scale-oriented club As usual Giant Scale class dominated Stars Club Olean NY year number Fokker D-VIII models increased four addition usual squadron Bristol Scouts revealing facts rally 25% participants brought Giant airplanes good indication trend large models NASA membership Bob Underwood president National Association Scale Aeromodelers has requested anyone has paid dues has received membership card news letters should write Bob Underwood 4109 Concord Oaks StLouis MO 63128 John Preston 7012 Elvira Court Falls Church VA 22042 NASA needs know anyone has inadvertently forgotten past Bob Dolly Wischer Rt 1 S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte Continued page 28 increased deflection elevator causes higher normal acceleration tighter loop causes pushrod bend further causes elevator deflect more. combination conditions vicious cycle can end either wing pushrod failure course situation reversed elevator horn top elevator case inside loops will tighter outside loops Turbulence causes oscillatory loads control surfaces due dynamic magnification factor such loads higher static loads way elevator rudder horn clevis wear out rudder especial ly prone turbulence problems because its control horn short causing higher pushrod forces both neutral deflected positions situation sounds pretty grim doesnt However few good design procedures will alleviate problems prefer use 5/16-in wood dowels pushrods rather -in fiberglass arrow shafts 5/16-in dowel strong enough resist bending due normal loads light enough keep weight down end pushrod drill 1/16-in hole side-to-side about end cut 1/16-in groove hole end along side piece 1/16-in music wire bent 900 just enough wire bend go through dowel 106 Model Aviation