Radio Control Sport Aerobatics RonVan Putte RECENTLY began class fellow club members fly aerobatic pat tern maneuvers class started off discussion proper airplane setup Novice pattern soon became ap parent fliers have difficulty flying general pattern flying par ticular because poor airplane setup Typically airplanes have control de flections far excess what required performing maneuvers dont know set up way insure adequate control power will available emergency situations builder copied local hot dog flier has airplane can perform snap rolls immediately after takeoff Nev ertheless what follows opinions airplane should rigged Novice pattern landing gear/wheel combination tricycle gear installation should adjusted airplane will sit ground level attitude nose airplane tipped down looks like bloodhound trail escaped con vict airplane will take off smoothly As airplane accelerates takeoff wing lift will probably di rected downward causing nose-down pitching moment about main gear increases increasing airspeed excessive up elevator required un stick nose airplane will cause airplane pitch up rapidly finally begins rotate airplane will leap air too high climb angle Conversely gear installation rigged nose sits up too high airplane will probably takeoff prematurely may perform classic snap roll crash maneuver fliers use excessive nose gear steering Im sure fliers have seen owned airplane could turn around inside broom closet Lets face pattern airplanes meant turn ground reason nose gear steering pattern airplane make go straight line takeoff landing pattern contest caller carries airplane takeoff position picks up after landing However compromise steering bit give what actually required takeoff landing make con venient taxi airplane arent contest situation Generally gets adequate nose gear steering using longest steering arm least amount rudder output practical ad vice nose gear steering can see barely detectable nose gear movement its probably too much As far rudder concerned con trol deflections excess about 35 de grees little increase drag What would Novice pattern ad just maximum deflection 35 degrees leave Most well-known pattern airplanes have developed suf ficiently large rudder Super flugen II has insufficient directional con trol 35 degrees rudder deflection airplane needs bigger rudder aileron deflection should adjusted provide three axial rolls five seconds stick held over stops usually have friend time maneuver call start stop After adjusting maximum aileron deflection obtain three rolls five seconds airplane will have adequate rolling power snap maneuvers However anyone needing aileron deflection ma neuvers like snap rolls will probably have duel rate aileron switch anyway elevator control deflection difficult adjust airplanes flying Novice pattern maximum elevator deflection required amount necessary flare landing Con sequently airplane should adjusted have enough elevator deflection plus small reserve rotate landing attitude Have friend watch elevator control stick position land air plane adjust elevator deflection provide 25 percent reserve course elevator will required perform spins since Novice pattern doesnt include spins theres no reason com promise rest maneuvers just able spin airplane adjust control deflections Ive indicated will find fly ing will smooth out maneuvers will look much better Increased smooth ness will improve confidence thats important factors flying acrobatics Friends mourn death fine old lady born during first week October 1974 died second week June 1978 venerable Phoenix VI will rise ashes crash caused mid-air collision Huntsville Continued page 91 October1978 23 Check out matching outfits Lamar Gil bert new daughter garments made lightweight drapery material r-ruparung Tar ciosing air snow aier iast Nationals Joe Bridi seems putting new rubber motor latest creation us carry around own wind sock Herb Dickerson attaches portable unit car flying field Midair collision victim gets no respect Rons 3A year old Phoenix suffers final indigni ty sparring partner luckyhis ships have survived five midairs row lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review WHY BUILD ANYTHING LESS THAN THE BEST Compare before build Dont waste time money build ing just ordin ary clock Now can easily inex pensively build some worlds best grandfather clocks Beautifully designed exquisitely de tailed simple do-it-your self precut kit 50% IISTIGOD CLOCKS N KITS Uncompromised quality 3210 Airport Way Dept 8-MA-iD Long Beach CA 90806 213 595-4981 brush-on type polyurethane varnish Several people have written ask get information about new Phoenix 8 According Dave Scully standard kit will cost S7995 deluxe kit $11995 standard kit includes epoxy/glass fuselage molded canopy detail stab fillets pushrod exit guides belly pan will have molded wing bolt recesses Foam wings stab rudder included detailed plans instructions will include provisions optional flying stab installation deluxe kit will also have complete wood package neces sary hardware production kits should available now have questions want order kit write Aero Composites 411 Townsend Place Dayton Ohio 45431 Ron Van Pune 12 Connie Drive Shal imar FL 32579 RC Pylon/Lane continued page 24 looks K&B really did homework noticed Bakersfield races lot super fast guys using GbBee glow plug Gb-Bee plug doesnt last longer K&B plug engines turn little faster 200 400 rpm Propellers still area needs experimentation Someone going come up right answer days maybe turn magic time minute 10 laps Colorado last year attended Quarter Midget race Pueblo guys up using 6 diameter props 15s going like stink Most Formula pilots run ning between 7 8 diameter props 40s Maybe someone should try 7/4diameter prop smaller diam eter faster can turn engine before prop tips go sonic engine air pump basically faster turns air pumps power get dont think getting close potential horsepower 40s can get 40 turn above 25000 rpm will start reach peak horsepower dont profess know get engines go better anyone else think engines close peak state art now can look props plugs mounting techniques spinner goes along fine tuning should balanced should run true no wobble An out balance spinner easily can cost 500rpm also can shake engine lose ten laps engine lugs mount beams must make total contact mounting screws must perpendicular mount beams center engine lug holes slight misalignment mounting screws will distort engine crankcase cost much 1000 rpm plus shortening life engine sure engine compartment clean would surprised much dirt engine will ingest through venturi Any dirt loose paint etc will ruin engine short run Dave Lane 4477 W 136th St Haw thorne CA 90250 R C Helicopters/Chesney continued page 25 extension stock Kavan fan spinner should effectively reduce chances starter slipping fan blades unit inserted end stock fan assembly tightened place via Allen screw Also available ex tended starter cone Sullivan starter starter accessory intended primar ily Heliboy starter system also mates above spinner extension may used belt starting systems Both spinner extension Part #S 1011 starter extension Part #S 1010 available Miniature Aircraft Supply 2563 Diversified Way Orlando Fla 32304 Inexpensive Fiberglass Canopies Replace ment canopies Revolution Heli-baby type helicopters may fabri cated using foam fiberglass techniques articles have written about use styrofoam epoxy-glass fabricate aircraft cowlings other com ponents technique use similar differs have chosen urethane foam polyester resin rather styrofoam epoxy method foam used green urethane manu factured insulation purposes Urethane foam also available white Urethane foam unlike styrofoam affected glues resins easily sanded shape cannot cut hot wire Styrofoam blocks may substituted following steps use polyes ter resins substitution made first glance following may seem bit complicated total process takes few hours After developing rough sketch canopy design transfer idea three full-size poster board templates representing rear bulkhead shape side view center sec tion top view center section templates may taped together front helicopter give some idea final shape canopy satisfied general shapes templates may used make appropriate plywood formers formers cut will used aid forming canopy well rear bulkhead supporting members canopy itself vertical hori zontal formers will provide rigidity final shape well provide means mounting finished canopy rear bulkhead Blocks ardwood glued place side horizon tal former assembly spot glued place rear bulkhead drilling Final attachment via 4-40 screws blind mounting nuts 92 Model Aviation Send Now yeur FREE brochure featuring finest grandfather wall mantel clock kits product review product review product review Diesel Conversion Heads Big Engines Wide ly known AA applications Davis Die sel Conversion Heads also can used big engines Pic shows OS Max 40 installed Lanier Jester Diesel head Engine swings 11 x 7/ Top Flite 9500 rpm idles 2200 rpm Fuel consumption two minutes per ounce Operation smooth can hand start ed Davis Diesel Development Box 141 Mu ford CT 06460 product review proluct review product review
Edition: Model Aviation - 1978/10
Page Numbers: 23, 91, 92
Radio Control Sport Aerobatics RonVan Putte RECENTLY began class fellow club members fly aerobatic pat tern maneuvers class started off discussion proper airplane setup Novice pattern soon became ap parent fliers have difficulty flying general pattern flying par ticular because poor airplane setup Typically airplanes have control de flections far excess what required performing maneuvers dont know set up way insure adequate control power will available emergency situations builder copied local hot dog flier has airplane can perform snap rolls immediately after takeoff Nev ertheless what follows opinions airplane should rigged Novice pattern landing gear/wheel combination tricycle gear installation should adjusted airplane will sit ground level attitude nose airplane tipped down looks like bloodhound trail escaped con vict airplane will take off smoothly As airplane accelerates takeoff wing lift will probably di rected downward causing nose-down pitching moment about main gear increases increasing airspeed excessive up elevator required un stick nose airplane will cause airplane pitch up rapidly finally begins rotate airplane will leap air too high climb angle Conversely gear installation rigged nose sits up too high airplane will probably takeoff prematurely may perform classic snap roll crash maneuver fliers use excessive nose gear steering Im sure fliers have seen owned airplane could turn around inside broom closet Lets face pattern airplanes meant turn ground reason nose gear steering pattern airplane make go straight line takeoff landing pattern contest caller carries airplane takeoff position picks up after landing However compromise steering bit give what actually required takeoff landing make con venient taxi airplane arent contest situation Generally gets adequate nose gear steering using longest steering arm least amount rudder output practical ad vice nose gear steering can see barely detectable nose gear movement its probably too much As far rudder concerned con trol deflections excess about 35 de grees little increase drag What would Novice pattern ad just maximum deflection 35 degrees leave Most well-known pattern airplanes have developed suf ficiently large rudder Super flugen II has insufficient directional con trol 35 degrees rudder deflection airplane needs bigger rudder aileron deflection should adjusted provide three axial rolls five seconds stick held over stops usually have friend time maneuver call start stop After adjusting maximum aileron deflection obtain three rolls five seconds airplane will have adequate rolling power snap maneuvers However anyone needing aileron deflection ma neuvers like snap rolls will probably have duel rate aileron switch anyway elevator control deflection difficult adjust airplanes flying Novice pattern maximum elevator deflection required amount necessary flare landing Con sequently airplane should adjusted have enough elevator deflection plus small reserve rotate landing attitude Have friend watch elevator control stick position land air plane adjust elevator deflection provide 25 percent reserve course elevator will required perform spins since Novice pattern doesnt include spins theres no reason com promise rest maneuvers just able spin airplane adjust control deflections Ive indicated will find fly ing will smooth out maneuvers will look much better Increased smooth ness will improve confidence thats important factors flying acrobatics Friends mourn death fine old lady born during first week October 1974 died second week June 1978 venerable Phoenix VI will rise ashes crash caused mid-air collision Huntsville Continued page 91 October1978 23 Check out matching outfits Lamar Gil bert new daughter garments made lightweight drapery material r-ruparung Tar ciosing air snow aier iast Nationals Joe Bridi seems putting new rubber motor latest creation us carry around own wind sock Herb Dickerson attaches portable unit car flying field Midair collision victim gets no respect Rons 3A year old Phoenix suffers final indigni ty sparring partner luckyhis ships have survived five midairs row lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review WHY BUILD ANYTHING LESS THAN THE BEST Compare before build Dont waste time money build ing just ordin ary clock Now can easily inex pensively build some worlds best grandfather clocks Beautifully designed exquisitely de tailed simple do-it-your self precut kit 50% IISTIGOD CLOCKS N KITS Uncompromised quality 3210 Airport Way Dept 8-MA-iD Long Beach CA 90806 213 595-4981 brush-on type polyurethane varnish Several people have written ask get information about new Phoenix 8 According Dave Scully standard kit will cost S7995 deluxe kit $11995 standard kit includes epoxy/glass fuselage molded canopy detail stab fillets pushrod exit guides belly pan will have molded wing bolt recesses Foam wings stab rudder included detailed plans instructions will include provisions optional flying stab installation deluxe kit will also have complete wood package neces sary hardware production kits should available now have questions want order kit write Aero Composites 411 Townsend Place Dayton Ohio 45431 Ron Van Pune 12 Connie Drive Shal imar FL 32579 RC Pylon/Lane continued page 24 looks K&B really did homework noticed Bakersfield races lot super fast guys using GbBee glow plug Gb-Bee plug doesnt last longer K&B plug engines turn little faster 200 400 rpm Propellers still area needs experimentation Someone going come up right answer days maybe turn magic time minute 10 laps Colorado last year attended Quarter Midget race Pueblo guys up using 6 diameter props 15s going like stink Most Formula pilots run ning between 7 8 diameter props 40s Maybe someone should try 7/4diameter prop smaller diam eter faster can turn engine before prop tips go sonic engine air pump basically faster turns air pumps power get dont think getting close potential horsepower 40s can get 40 turn above 25000 rpm will start reach peak horsepower dont profess know get engines go better anyone else think engines close peak state art now can look props plugs mounting techniques spinner goes along fine tuning should balanced should run true no wobble An out balance spinner easily can cost 500rpm also can shake engine lose ten laps engine lugs mount beams must make total contact mounting screws must perpendicular mount beams center engine lug holes slight misalignment mounting screws will distort engine crankcase cost much 1000 rpm plus shortening life engine sure engine compartment clean would surprised much dirt engine will ingest through venturi Any dirt loose paint etc will ruin engine short run Dave Lane 4477 W 136th St Haw thorne CA 90250 R C Helicopters/Chesney continued page 25 extension stock Kavan fan spinner should effectively reduce chances starter slipping fan blades unit inserted end stock fan assembly tightened place via Allen screw Also available ex tended starter cone Sullivan starter starter accessory intended primar ily Heliboy starter system also mates above spinner extension may used belt starting systems Both spinner extension Part #S 1011 starter extension Part #S 1010 available Miniature Aircraft Supply 2563 Diversified Way Orlando Fla 32304 Inexpensive Fiberglass Canopies Replace ment canopies Revolution Heli-baby type helicopters may fabri cated using foam fiberglass techniques articles have written about use styrofoam epoxy-glass fabricate aircraft cowlings other com ponents technique use similar differs have chosen urethane foam polyester resin rather styrofoam epoxy method foam used green urethane manu factured insulation purposes Urethane foam also available white Urethane foam unlike styrofoam affected glues resins easily sanded shape cannot cut hot wire Styrofoam blocks may substituted following steps use polyes ter resins substitution made first glance following may seem bit complicated total process takes few hours After developing rough sketch canopy design transfer idea three full-size poster board templates representing rear bulkhead shape side view center sec tion top view center section templates may taped together front helicopter give some idea final shape canopy satisfied general shapes templates may used make appropriate plywood formers formers cut will used aid forming canopy well rear bulkhead supporting members canopy itself vertical hori zontal formers will provide rigidity final shape well provide means mounting finished canopy rear bulkhead Blocks ardwood glued place side horizon tal former assembly spot glued place rear bulkhead drilling Final attachment via 4-40 screws blind mounting nuts 92 Model Aviation Send Now yeur FREE brochure featuring finest grandfather wall mantel clock kits product review product review product review Diesel Conversion Heads Big Engines Wide ly known AA applications Davis Die sel Conversion Heads also can used big engines Pic shows OS Max 40 installed Lanier Jester Diesel head Engine swings 11 x 7/ Top Flite 9500 rpm idles 2200 rpm Fuel consumption two minutes per ounce Operation smooth can hand start ed Davis Diesel Development Box 141 Mu ford CT 06460 product review proluct review product review
Edition: Model Aviation - 1978/10
Page Numbers: 23, 91, 92
Radio Control Sport Aerobatics RonVan Putte RECENTLY began class fellow club members fly aerobatic pat tern maneuvers class started off discussion proper airplane setup Novice pattern soon became ap parent fliers have difficulty flying general pattern flying par ticular because poor airplane setup Typically airplanes have control de flections far excess what required performing maneuvers dont know set up way insure adequate control power will available emergency situations builder copied local hot dog flier has airplane can perform snap rolls immediately after takeoff Nev ertheless what follows opinions airplane should rigged Novice pattern landing gear/wheel combination tricycle gear installation should adjusted airplane will sit ground level attitude nose airplane tipped down looks like bloodhound trail escaped con vict airplane will take off smoothly As airplane accelerates takeoff wing lift will probably di rected downward causing nose-down pitching moment about main gear increases increasing airspeed excessive up elevator required un stick nose airplane will cause airplane pitch up rapidly finally begins rotate airplane will leap air too high climb angle Conversely gear installation rigged nose sits up too high airplane will probably takeoff prematurely may perform classic snap roll crash maneuver fliers use excessive nose gear steering Im sure fliers have seen owned airplane could turn around inside broom closet Lets face pattern airplanes meant turn ground reason nose gear steering pattern airplane make go straight line takeoff landing pattern contest caller carries airplane takeoff position picks up after landing However compromise steering bit give what actually required takeoff landing make con venient taxi airplane arent contest situation Generally gets adequate nose gear steering using longest steering arm least amount rudder output practical ad vice nose gear steering can see barely detectable nose gear movement its probably too much As far rudder concerned con trol deflections excess about 35 de grees little increase drag What would Novice pattern ad just maximum deflection 35 degrees leave Most well-known pattern airplanes have developed suf ficiently large rudder Super flugen II has insufficient directional con trol 35 degrees rudder deflection airplane needs bigger rudder aileron deflection should adjusted provide three axial rolls five seconds stick held over stops usually have friend time maneuver call start stop After adjusting maximum aileron deflection obtain three rolls five seconds airplane will have adequate rolling power snap maneuvers However anyone needing aileron deflection ma neuvers like snap rolls will probably have duel rate aileron switch anyway elevator control deflection difficult adjust airplanes flying Novice pattern maximum elevator deflection required amount necessary flare landing Con sequently airplane should adjusted have enough elevator deflection plus small reserve rotate landing attitude Have friend watch elevator control stick position land air plane adjust elevator deflection provide 25 percent reserve course elevator will required perform spins since Novice pattern doesnt include spins theres no reason com promise rest maneuvers just able spin airplane adjust control deflections Ive indicated will find fly ing will smooth out maneuvers will look much better Increased smooth ness will improve confidence thats important factors flying acrobatics Friends mourn death fine old lady born during first week October 1974 died second week June 1978 venerable Phoenix VI will rise ashes crash caused mid-air collision Huntsville Continued page 91 October1978 23 Check out matching outfits Lamar Gil bert new daughter garments made lightweight drapery material r-ruparung Tar ciosing air snow aier iast Nationals Joe Bridi seems putting new rubber motor latest creation us carry around own wind sock Herb Dickerson attaches portable unit car flying field Midair collision victim gets no respect Rons 3A year old Phoenix suffers final indigni ty sparring partner luckyhis ships have survived five midairs row lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review WHY BUILD ANYTHING LESS THAN THE BEST Compare before build Dont waste time money build ing just ordin ary clock Now can easily inex pensively build some worlds best grandfather clocks Beautifully designed exquisitely de tailed simple do-it-your self precut kit 50% IISTIGOD CLOCKS N KITS Uncompromised quality 3210 Airport Way Dept 8-MA-iD Long Beach CA 90806 213 595-4981 brush-on type polyurethane varnish Several people have written ask get information about new Phoenix 8 According Dave Scully standard kit will cost S7995 deluxe kit $11995 standard kit includes epoxy/glass fuselage molded canopy detail stab fillets pushrod exit guides belly pan will have molded wing bolt recesses Foam wings stab rudder included detailed plans instructions will include provisions optional flying stab installation deluxe kit will also have complete wood package neces sary hardware production kits should available now have questions want order kit write Aero Composites 411 Townsend Place Dayton Ohio 45431 Ron Van Pune 12 Connie Drive Shal imar FL 32579 RC Pylon/Lane continued page 24 looks K&B really did homework noticed Bakersfield races lot super fast guys using GbBee glow plug Gb-Bee plug doesnt last longer K&B plug engines turn little faster 200 400 rpm Propellers still area needs experimentation Someone going come up right answer days maybe turn magic time minute 10 laps Colorado last year attended Quarter Midget race Pueblo guys up using 6 diameter props 15s going like stink Most Formula pilots run ning between 7 8 diameter props 40s Maybe someone should try 7/4diameter prop smaller diam eter faster can turn engine before prop tips go sonic engine air pump basically faster turns air pumps power get dont think getting close potential horsepower 40s can get 40 turn above 25000 rpm will start reach peak horsepower dont profess know get engines go better anyone else think engines close peak state art now can look props plugs mounting techniques spinner goes along fine tuning should balanced should run true no wobble An out balance spinner easily can cost 500rpm also can shake engine lose ten laps engine lugs mount beams must make total contact mounting screws must perpendicular mount beams center engine lug holes slight misalignment mounting screws will distort engine crankcase cost much 1000 rpm plus shortening life engine sure engine compartment clean would surprised much dirt engine will ingest through venturi Any dirt loose paint etc will ruin engine short run Dave Lane 4477 W 136th St Haw thorne CA 90250 R C Helicopters/Chesney continued page 25 extension stock Kavan fan spinner should effectively reduce chances starter slipping fan blades unit inserted end stock fan assembly tightened place via Allen screw Also available ex tended starter cone Sullivan starter starter accessory intended primar ily Heliboy starter system also mates above spinner extension may used belt starting systems Both spinner extension Part #S 1011 starter extension Part #S 1010 available Miniature Aircraft Supply 2563 Diversified Way Orlando Fla 32304 Inexpensive Fiberglass Canopies Replace ment canopies Revolution Heli-baby type helicopters may fabri cated using foam fiberglass techniques articles have written about use styrofoam epoxy-glass fabricate aircraft cowlings other com ponents technique use similar differs have chosen urethane foam polyester resin rather styrofoam epoxy method foam used green urethane manu factured insulation purposes Urethane foam also available white Urethane foam unlike styrofoam affected glues resins easily sanded shape cannot cut hot wire Styrofoam blocks may substituted following steps use polyes ter resins substitution made first glance following may seem bit complicated total process takes few hours After developing rough sketch canopy design transfer idea three full-size poster board templates representing rear bulkhead shape side view center sec tion top view center section templates may taped together front helicopter give some idea final shape canopy satisfied general shapes templates may used make appropriate plywood formers formers cut will used aid forming canopy well rear bulkhead supporting members canopy itself vertical hori zontal formers will provide rigidity final shape well provide means mounting finished canopy rear bulkhead Blocks ardwood glued place side horizon tal former assembly spot glued place rear bulkhead drilling Final attachment via 4-40 screws blind mounting nuts 92 Model Aviation Send Now yeur FREE brochure featuring finest grandfather wall mantel clock kits product review product review product review Diesel Conversion Heads Big Engines Wide ly known AA applications Davis Die sel Conversion Heads also can used big engines Pic shows OS Max 40 installed Lanier Jester Diesel head Engine swings 11 x 7/ Top Flite 9500 rpm idles 2200 rpm Fuel consumption two minutes per ounce Operation smooth can hand start ed Davis Diesel Development Box 141 Mu ford CT 06460 product review proluct review product review