Scale-SparI El Bill Warner HI GANG come youre reading column could build ing So just got home found latest Playboy Model viation ar rived after quick peek Play mate Month turned immediately MA anticipating Ralph Kuenzs highlyesteemed column Surprise Ralph has surrendered 100-hr week job Ma Bell desire have time again build spectacular models Ralph will hard act follow Im relying have great things share send em penalty non-contribution will putting up personal views antiquated hints tips flying things neat lets face free-flight scale ne plus ultra sport Something looks like airplane does cost arm leg build fly offers maximum fun time expended its lot fun re search building end spectrum rubber-powered Peanut model has life expectancy sev eral hours air other Nats-quality gas-scale job will prob dragged out once year biggie Whichever form FF scale prefer possibilities creativity satisfaction limitless thing has made FF scale fun dont bashful about writing share Memoriam few weeks ago superb FF scale modeler good friend Jacques Pouliquen passed away Remembered tects model builder Jacques worked tirean ex-champion France Coupe lessly revive scale art long dormant dHiver well accomplished archi- Continued page 96 April1978 39 Jumbo Stinson Jr George James weighs two ounces Lettering trim done purple Dr Martins dyed tissue Clorox bleach Rapidograph pen photos author Tom Comparet left Collin Di Maio Revere Jr HS Aeroplane Society Los Mngeles Nesmith Cougars made Peck kits Both planes turn flights 40-second range Gorgeous vintage Demoiselle UIiI Stroman i-I- scale guru Trom Norwalk California Yes makes own spoked wheels Kenny Hannans ultra-light Farman Moustique Brown CO2 power 30-in model put best show 77 Nats its super slow flights cat IE0 NEW/ MUFF-L-IT SERIES REGULAR XIUST Available B end C engines Six eight Db reduction noise engines Proportional volumne axpan sion chamber Large exhaust nozuis tar low beck pressure Littie no loss power 003010979$749 NO3772940$039 903034990$949 *.Ib ro B Mdc 040. No304000919$1085 No 30589 29.4$ ttl95 No304814980$1349 1/2A MUFFLER Fits alt COX 049 engines No 3009049$549 140 300t051$549 models have appeared mags Turkey appeared November 1977 issue MAN Plan No 301 $150 Hotbox July 1977 issue MB Plan No 7773 $100 mentioned fine P-30 kit manufactured Blue Ridge Models January issue Blue Ridge ModelS manufacturer Square Eagle P-30 Coupe de Ville kits sup pliers other free flight specialty items has new address PO Box 429 Skyland North Carolina 28776 hassle obtaining Jetex fuel has too much cope maybe wing stab Jetex model would serve P-30 model Maybe didnt plan way seems Wally Simmers designed pretty good P-30 back about 1940 called Gollywok information P-30 write Harry Steinmetz 4425 Samoset Ave San Diego CA 92117 Manhattan Mail-h Box up favorite Manhattan Formula indoor cabin model First Annual MIAMA Manhat tan Contest First prize expected hopefully trip two Miami including blimp rides deep sea fishing guest-of-honor appearance MIAMA annual banquet Models must arrive Miami no later April 14 1977 better hustle fur ther information write Dr John Martin 3227 Darwin St Miami FL 33133 Briefly rules Wing 20 max projected span 4 chord stab 8 X 3 max length including prop 20 weight less motor 4 gm mm fuselagetype models fuse must enclose box 2 X 2 X 4 windshield 2 sq side windows 1 sq two l-diam wheels covering tissue condenser paper wood prop Bob Meuser 4200 Gregory St Oak land CA 94619 country tremendous resurgence activity especially Peanut scale can traced efforts way bring ing plans kits articles scale meets attention French modelers Re spected loved Jacques sur vived wife Loly shared en thusiasm les peanuts Multi-Engine Madness interesting scale subjects world equipped two powerplants Two motors may double fun Now less adventurous type may search out CLT center-line thrust design such Bratu Cessna Push-pull Sometimes works Ive seen Tom Starks Dornier Pfiel rubber scaler traverse length El Toro Blimp Hangar Santa Ana California flying straight arrow Others including similar speed job have less successful Probably judicious sorting out prop suitability thrust adjustments fore aft would make fairly idea set-up available twins tn-motors fourengined planes however involve pos sibility assymetrical thrust side pulling harder other Years ago Irwin Ohlsson neat twin both ignition engines running off same set points both en gines turning same direction model tractable speed engine perfectly tune other Rubber-powered ships such P-38 seem work well though na celles installations too short store much rubber Controlling tendency side other pull other simply matter keeping track number winds stuffed side upping weak side few turns CO2 craze hit us few years ago reintroduction inexpensive light fairly reliable Brown Junior units first thing Walt Mooney did install pair rubber-type Canadair model running both off tank thought would both run out gas simultaneously negating hair raising prospect mill stopping dead other purred merrily away make long story short problem getting two engines run same speed incredibly difficult always wanting freeze down little throw whole thrust pattern out whack Lets get hassle trying synchronize two glow engines Jack Mc Cracken worked out sliding motormount set up Curtiss Condor two Cox Pee Wees Beautifully machined rig held forward position en gine thrust quit spring pulled back simulutaneously chopped other engine Great idea youre master machinist can work out bugs Despite weight problem Im opinion electric way go multi Flipping switch certainly easier flipping props Sync no big deal unless get some Hot Stuff mo tor bearing did Airspeed rpm being being pretty repeatable motor flight after flight com mon battery source sag down gether keeping thrust pattern con stant youre likely get problem lack experience electric may get hot water Wiring motors series parallel makes difference Dont go motor motor wiring run motors power straight out battery switch power Also plane needs kept light rubber ship want run contrarotating props just reverse leads get reverse-pitch prop later electric December 1977 Flightmasters Jumbo-Peanut Scale meet number entrants prompted addition multi-engine class let imagina tions run free Some unusual 96 Model Aviation FF Sport Scale/Warner continued page 39 writing estaera mention read about MA entries included Tom Lauries Douglas XB-42 Mixmaster Fernando Ramos Franco-Prussian Bloch powered troop glider Warren Shipps Uppercu-Burnelli UB 14 B Chuck Wests Westland Whirl wind Walt Mooneys Canadair George James Dornier Pfiel Bill Stromans Zeppelin Staaken Preferred power included twin geared motors contra-rotating XB-42 CO2 forthe BlochCox 020s Whirl wind electric Staaken Airspeed Ferry rubber Pfiel Burnelli Canadair Although en tries plagued minor problems failed make required 15-second qual ification flight such courage should ap plauded event won tri motored Airspeed biplane advantage being tested over year half preceeding contest Second went ol perfesser San Diego Walt Mooney Canadair rubber con tained nacelles gave just enough run rousing third Stromans Hercu lean effort Zep ROGd due pendulum stability con trols needed just tad bat tery department four Astro 02s seemed have enough potential fly eight-foot behemoth took off after about 50-foot run Bleaching Dr Martin nifty new way get light letters trim dark back ground comes George James George uses Dr Martins dye white tissue pur ple small brush Clo rox dye bleaches out unwanted areas Rapidograph pen handy small letters make edges trim large letters sharp Try next time want ultra-light job generally use Pres Bruning method sticking opaque letters color-doped tissue using spray rubber cement does add bit heavy some models Until next time thermals Send ideas pix etc pay used Bill Warner 423-C San Vicente Blvd. Santa Monica CA 90402 Bobcat/K ilsdonk continued page 42 ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE 1-IELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 5-3each 5-45/a-35Y2-4304 6-36-4354 747-67-8504 8-48-68-8654 9-4g-6g-7 9-810-410-6854 11-411-611-8$1 12-412-512-6$150 2 Blade Pusher 5Y2-4 6-36-4354 8-6854 9-610-6$1 3 Blade Tractor 6-36-36-4 504 3 Blade Pusher 6-3504 Made polyester boll Color signed no-nonsense airfoil sheeted meets one-inch wing thickness rule need two rib except No 1 Glue ribs 1/4 X 3/s bottom spar leading edge Any new cyanoacrylates Hot-Stuff Zap etc recommended entire wing construction building openframe construction glue trailing edge sheeting followed LE center section rib cap strips fully sheeted wing completely sheeted bottom side bellcrank installed along wing tip skid mounts blind nuts USE TO PROPEL AIR CREATE THRUST AND PROPELLED BY AIR Metallic Aluminum Color 7-67-8$1 8-68-8$125 9-6 10-610-4$150 Pusher 10-6$150 entire top sheeted Dont forget stall pushrods before installing center top section sheeting wing tips can made either 1 balsa double thickness scrap a left over fuselage plank tips carved hollowed out shown Glue Titebond epoxy No wing tip weight required Finish sand sheeted surfaces 150 220 grit garnet paper wing done fuselage stab rudder very straightforward use tank re cessed fuselage shown install outboard plywood doubler first cut tips rib templates plans de product review product review product review cock$t fl coaming__ Cockpit Coaming extruded flexible black vinyl material pre-shaped fit around corner two sizes 3/32and 3/16 dia Price 2 feet size $195 Strut Fairing extruded rigid vinyl two sizes 3/32 1/8 lD packaged two 23 lengths Price size $225 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review THIS FORM ND ATTACH MAILING XI5S~J ABEL FROM RECENT LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC 20005 Check appropriate boxenclose payment C NEW SUBSCRIPTION C CHANGE OF ADDRESS Non-AMA subscription rates $1200 12 months Canada United States possession elsewhere $1400 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 April1978 97 GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 8 & 10 PITCH20800 221000 241300 AT YOUR DEALER RIGHT HAND ROTATION 318 BORE T DISCRETION OF HE PURCHASER 3 E PROPELLERS AT YOUR OALER Os G RUSH ST JOHN INDIANA 46373
Edition: Model Aviation - 1978/04
Page Numbers: 39, 96, 97
Scale-SparI El Bill Warner HI GANG come youre reading column could build ing So just got home found latest Playboy Model viation ar rived after quick peek Play mate Month turned immediately MA anticipating Ralph Kuenzs highlyesteemed column Surprise Ralph has surrendered 100-hr week job Ma Bell desire have time again build spectacular models Ralph will hard act follow Im relying have great things share send em penalty non-contribution will putting up personal views antiquated hints tips flying things neat lets face free-flight scale ne plus ultra sport Something looks like airplane does cost arm leg build fly offers maximum fun time expended its lot fun re search building end spectrum rubber-powered Peanut model has life expectancy sev eral hours air other Nats-quality gas-scale job will prob dragged out once year biggie Whichever form FF scale prefer possibilities creativity satisfaction limitless thing has made FF scale fun dont bashful about writing share Memoriam few weeks ago superb FF scale modeler good friend Jacques Pouliquen passed away Remembered tects model builder Jacques worked tirean ex-champion France Coupe lessly revive scale art long dormant dHiver well accomplished archi- Continued page 96 April1978 39 Jumbo Stinson Jr George James weighs two ounces Lettering trim done purple Dr Martins dyed tissue Clorox bleach Rapidograph pen photos author Tom Comparet left Collin Di Maio Revere Jr HS Aeroplane Society Los Mngeles Nesmith Cougars made Peck kits Both planes turn flights 40-second range Gorgeous vintage Demoiselle UIiI Stroman i-I- scale guru Trom Norwalk California Yes makes own spoked wheels Kenny Hannans ultra-light Farman Moustique Brown CO2 power 30-in model put best show 77 Nats its super slow flights cat IE0 NEW/ MUFF-L-IT SERIES REGULAR XIUST Available B end C engines Six eight Db reduction noise engines Proportional volumne axpan sion chamber Large exhaust nozuis tar low beck pressure Littie no loss power 003010979$749 NO3772940$039 903034990$949 *.Ib ro B Mdc 040. No304000919$1085 No 30589 29.4$ ttl95 No304814980$1349 1/2A MUFFLER Fits alt COX 049 engines No 3009049$549 140 300t051$549 models have appeared mags Turkey appeared November 1977 issue MAN Plan No 301 $150 Hotbox July 1977 issue MB Plan No 7773 $100 mentioned fine P-30 kit manufactured Blue Ridge Models January issue Blue Ridge ModelS manufacturer Square Eagle P-30 Coupe de Ville kits sup pliers other free flight specialty items has new address PO Box 429 Skyland North Carolina 28776 hassle obtaining Jetex fuel has too much cope maybe wing stab Jetex model would serve P-30 model Maybe didnt plan way seems Wally Simmers designed pretty good P-30 back about 1940 called Gollywok information P-30 write Harry Steinmetz 4425 Samoset Ave San Diego CA 92117 Manhattan Mail-h Box up favorite Manhattan Formula indoor cabin model First Annual MIAMA Manhat tan Contest First prize expected hopefully trip two Miami including blimp rides deep sea fishing guest-of-honor appearance MIAMA annual banquet Models must arrive Miami no later April 14 1977 better hustle fur ther information write Dr John Martin 3227 Darwin St Miami FL 33133 Briefly rules Wing 20 max projected span 4 chord stab 8 X 3 max length including prop 20 weight less motor 4 gm mm fuselagetype models fuse must enclose box 2 X 2 X 4 windshield 2 sq side windows 1 sq two l-diam wheels covering tissue condenser paper wood prop Bob Meuser 4200 Gregory St Oak land CA 94619 country tremendous resurgence activity especially Peanut scale can traced efforts way bring ing plans kits articles scale meets attention French modelers Re spected loved Jacques sur vived wife Loly shared en thusiasm les peanuts Multi-Engine Madness interesting scale subjects world equipped two powerplants Two motors may double fun Now less adventurous type may search out CLT center-line thrust design such Bratu Cessna Push-pull Sometimes works Ive seen Tom Starks Dornier Pfiel rubber scaler traverse length El Toro Blimp Hangar Santa Ana California flying straight arrow Others including similar speed job have less successful Probably judicious sorting out prop suitability thrust adjustments fore aft would make fairly idea set-up available twins tn-motors fourengined planes however involve pos sibility assymetrical thrust side pulling harder other Years ago Irwin Ohlsson neat twin both ignition engines running off same set points both en gines turning same direction model tractable speed engine perfectly tune other Rubber-powered ships such P-38 seem work well though na celles installations too short store much rubber Controlling tendency side other pull other simply matter keeping track number winds stuffed side upping weak side few turns CO2 craze hit us few years ago reintroduction inexpensive light fairly reliable Brown Junior units first thing Walt Mooney did install pair rubber-type Canadair model running both off tank thought would both run out gas simultaneously negating hair raising prospect mill stopping dead other purred merrily away make long story short problem getting two engines run same speed incredibly difficult always wanting freeze down little throw whole thrust pattern out whack Lets get hassle trying synchronize two glow engines Jack Mc Cracken worked out sliding motormount set up Curtiss Condor two Cox Pee Wees Beautifully machined rig held forward position en gine thrust quit spring pulled back simulutaneously chopped other engine Great idea youre master machinist can work out bugs Despite weight problem Im opinion electric way go multi Flipping switch certainly easier flipping props Sync no big deal unless get some Hot Stuff mo tor bearing did Airspeed rpm being being pretty repeatable motor flight after flight com mon battery source sag down gether keeping thrust pattern con stant youre likely get problem lack experience electric may get hot water Wiring motors series parallel makes difference Dont go motor motor wiring run motors power straight out battery switch power Also plane needs kept light rubber ship want run contrarotating props just reverse leads get reverse-pitch prop later electric December 1977 Flightmasters Jumbo-Peanut Scale meet number entrants prompted addition multi-engine class let imagina tions run free Some unusual 96 Model Aviation FF Sport Scale/Warner continued page 39 writing estaera mention read about MA entries included Tom Lauries Douglas XB-42 Mixmaster Fernando Ramos Franco-Prussian Bloch powered troop glider Warren Shipps Uppercu-Burnelli UB 14 B Chuck Wests Westland Whirl wind Walt Mooneys Canadair George James Dornier Pfiel Bill Stromans Zeppelin Staaken Preferred power included twin geared motors contra-rotating XB-42 CO2 forthe BlochCox 020s Whirl wind electric Staaken Airspeed Ferry rubber Pfiel Burnelli Canadair Although en tries plagued minor problems failed make required 15-second qual ification flight such courage should ap plauded event won tri motored Airspeed biplane advantage being tested over year half preceeding contest Second went ol perfesser San Diego Walt Mooney Canadair rubber con tained nacelles gave just enough run rousing third Stromans Hercu lean effort Zep ROGd due pendulum stability con trols needed just tad bat tery department four Astro 02s seemed have enough potential fly eight-foot behemoth took off after about 50-foot run Bleaching Dr Martin nifty new way get light letters trim dark back ground comes George James George uses Dr Martins dye white tissue pur ple small brush Clo rox dye bleaches out unwanted areas Rapidograph pen handy small letters make edges trim large letters sharp Try next time want ultra-light job generally use Pres Bruning method sticking opaque letters color-doped tissue using spray rubber cement does add bit heavy some models Until next time thermals Send ideas pix etc pay used Bill Warner 423-C San Vicente Blvd. Santa Monica CA 90402 Bobcat/K ilsdonk continued page 42 ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE 1-IELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 5-3each 5-45/a-35Y2-4304 6-36-4354 747-67-8504 8-48-68-8654 9-4g-6g-7 9-810-410-6854 11-411-611-8$1 12-412-512-6$150 2 Blade Pusher 5Y2-4 6-36-4354 8-6854 9-610-6$1 3 Blade Tractor 6-36-36-4 504 3 Blade Pusher 6-3504 Made polyester boll Color signed no-nonsense airfoil sheeted meets one-inch wing thickness rule need two rib except No 1 Glue ribs 1/4 X 3/s bottom spar leading edge Any new cyanoacrylates Hot-Stuff Zap etc recommended entire wing construction building openframe construction glue trailing edge sheeting followed LE center section rib cap strips fully sheeted wing completely sheeted bottom side bellcrank installed along wing tip skid mounts blind nuts USE TO PROPEL AIR CREATE THRUST AND PROPELLED BY AIR Metallic Aluminum Color 7-67-8$1 8-68-8$125 9-6 10-610-4$150 Pusher 10-6$150 entire top sheeted Dont forget stall pushrods before installing center top section sheeting wing tips can made either 1 balsa double thickness scrap a left over fuselage plank tips carved hollowed out shown Glue Titebond epoxy No wing tip weight required Finish sand sheeted surfaces 150 220 grit garnet paper wing done fuselage stab rudder very straightforward use tank re cessed fuselage shown install outboard plywood doubler first cut tips rib templates plans de product review product review product review cock$t fl coaming__ Cockpit Coaming extruded flexible black vinyl material pre-shaped fit around corner two sizes 3/32and 3/16 dia Price 2 feet size $195 Strut Fairing extruded rigid vinyl two sizes 3/32 1/8 lD packaged two 23 lengths Price size $225 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review THIS FORM ND ATTACH MAILING XI5S~J ABEL FROM RECENT LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC 20005 Check appropriate boxenclose payment C NEW SUBSCRIPTION C CHANGE OF ADDRESS Non-AMA subscription rates $1200 12 months Canada United States possession elsewhere $1400 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 April1978 97 GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 8 & 10 PITCH20800 221000 241300 AT YOUR DEALER RIGHT HAND ROTATION 318 BORE T DISCRETION OF HE PURCHASER 3 E PROPELLERS AT YOUR OALER Os G RUSH ST JOHN INDIANA 46373
Edition: Model Aviation - 1978/04
Page Numbers: 39, 96, 97
Scale-SparI El Bill Warner HI GANG come youre reading column could build ing So just got home found latest Playboy Model viation ar rived after quick peek Play mate Month turned immediately MA anticipating Ralph Kuenzs highlyesteemed column Surprise Ralph has surrendered 100-hr week job Ma Bell desire have time again build spectacular models Ralph will hard act follow Im relying have great things share send em penalty non-contribution will putting up personal views antiquated hints tips flying things neat lets face free-flight scale ne plus ultra sport Something looks like airplane does cost arm leg build fly offers maximum fun time expended its lot fun re search building end spectrum rubber-powered Peanut model has life expectancy sev eral hours air other Nats-quality gas-scale job will prob dragged out once year biggie Whichever form FF scale prefer possibilities creativity satisfaction limitless thing has made FF scale fun dont bashful about writing share Memoriam few weeks ago superb FF scale modeler good friend Jacques Pouliquen passed away Remembered tects model builder Jacques worked tirean ex-champion France Coupe lessly revive scale art long dormant dHiver well accomplished archi- Continued page 96 April1978 39 Jumbo Stinson Jr George James weighs two ounces Lettering trim done purple Dr Martins dyed tissue Clorox bleach Rapidograph pen photos author Tom Comparet left Collin Di Maio Revere Jr HS Aeroplane Society Los Mngeles Nesmith Cougars made Peck kits Both planes turn flights 40-second range Gorgeous vintage Demoiselle UIiI Stroman i-I- scale guru Trom Norwalk California Yes makes own spoked wheels Kenny Hannans ultra-light Farman Moustique Brown CO2 power 30-in model put best show 77 Nats its super slow flights cat IE0 NEW/ MUFF-L-IT SERIES REGULAR XIUST Available B end C engines Six eight Db reduction noise engines Proportional volumne axpan sion chamber Large exhaust nozuis tar low beck pressure Littie no loss power 003010979$749 NO3772940$039 903034990$949 *.Ib ro B Mdc 040. No304000919$1085 No 30589 29.4$ ttl95 No304814980$1349 1/2A MUFFLER Fits alt COX 049 engines No 3009049$549 140 300t051$549 models have appeared mags Turkey appeared November 1977 issue MAN Plan No 301 $150 Hotbox July 1977 issue MB Plan No 7773 $100 mentioned fine P-30 kit manufactured Blue Ridge Models January issue Blue Ridge ModelS manufacturer Square Eagle P-30 Coupe de Ville kits sup pliers other free flight specialty items has new address PO Box 429 Skyland North Carolina 28776 hassle obtaining Jetex fuel has too much cope maybe wing stab Jetex model would serve P-30 model Maybe didnt plan way seems Wally Simmers designed pretty good P-30 back about 1940 called Gollywok information P-30 write Harry Steinmetz 4425 Samoset Ave San Diego CA 92117 Manhattan Mail-h Box up favorite Manhattan Formula indoor cabin model First Annual MIAMA Manhat tan Contest First prize expected hopefully trip two Miami including blimp rides deep sea fishing guest-of-honor appearance MIAMA annual banquet Models must arrive Miami no later April 14 1977 better hustle fur ther information write Dr John Martin 3227 Darwin St Miami FL 33133 Briefly rules Wing 20 max projected span 4 chord stab 8 X 3 max length including prop 20 weight less motor 4 gm mm fuselagetype models fuse must enclose box 2 X 2 X 4 windshield 2 sq side windows 1 sq two l-diam wheels covering tissue condenser paper wood prop Bob Meuser 4200 Gregory St Oak land CA 94619 country tremendous resurgence activity especially Peanut scale can traced efforts way bring ing plans kits articles scale meets attention French modelers Re spected loved Jacques sur vived wife Loly shared en thusiasm les peanuts Multi-Engine Madness interesting scale subjects world equipped two powerplants Two motors may double fun Now less adventurous type may search out CLT center-line thrust design such Bratu Cessna Push-pull Sometimes works Ive seen Tom Starks Dornier Pfiel rubber scaler traverse length El Toro Blimp Hangar Santa Ana California flying straight arrow Others including similar speed job have less successful Probably judicious sorting out prop suitability thrust adjustments fore aft would make fairly idea set-up available twins tn-motors fourengined planes however involve pos sibility assymetrical thrust side pulling harder other Years ago Irwin Ohlsson neat twin both ignition engines running off same set points both en gines turning same direction model tractable speed engine perfectly tune other Rubber-powered ships such P-38 seem work well though na celles installations too short store much rubber Controlling tendency side other pull other simply matter keeping track number winds stuffed side upping weak side few turns CO2 craze hit us few years ago reintroduction inexpensive light fairly reliable Brown Junior units first thing Walt Mooney did install pair rubber-type Canadair model running both off tank thought would both run out gas simultaneously negating hair raising prospect mill stopping dead other purred merrily away make long story short problem getting two engines run same speed incredibly difficult always wanting freeze down little throw whole thrust pattern out whack Lets get hassle trying synchronize two glow engines Jack Mc Cracken worked out sliding motormount set up Curtiss Condor two Cox Pee Wees Beautifully machined rig held forward position en gine thrust quit spring pulled back simulutaneously chopped other engine Great idea youre master machinist can work out bugs Despite weight problem Im opinion electric way go multi Flipping switch certainly easier flipping props Sync no big deal unless get some Hot Stuff mo tor bearing did Airspeed rpm being being pretty repeatable motor flight after flight com mon battery source sag down gether keeping thrust pattern con stant youre likely get problem lack experience electric may get hot water Wiring motors series parallel makes difference Dont go motor motor wiring run motors power straight out battery switch power Also plane needs kept light rubber ship want run contrarotating props just reverse leads get reverse-pitch prop later electric December 1977 Flightmasters Jumbo-Peanut Scale meet number entrants prompted addition multi-engine class let imagina tions run free Some unusual 96 Model Aviation FF Sport Scale/Warner continued page 39 writing estaera mention read about MA entries included Tom Lauries Douglas XB-42 Mixmaster Fernando Ramos Franco-Prussian Bloch powered troop glider Warren Shipps Uppercu-Burnelli UB 14 B Chuck Wests Westland Whirl wind Walt Mooneys Canadair George James Dornier Pfiel Bill Stromans Zeppelin Staaken Preferred power included twin geared motors contra-rotating XB-42 CO2 forthe BlochCox 020s Whirl wind electric Staaken Airspeed Ferry rubber Pfiel Burnelli Canadair Although en tries plagued minor problems failed make required 15-second qual ification flight such courage should ap plauded event won tri motored Airspeed biplane advantage being tested over year half preceeding contest Second went ol perfesser San Diego Walt Mooney Canadair rubber con tained nacelles gave just enough run rousing third Stromans Hercu lean effort Zep ROGd due pendulum stability con trols needed just tad bat tery department four Astro 02s seemed have enough potential fly eight-foot behemoth took off after about 50-foot run Bleaching Dr Martin nifty new way get light letters trim dark back ground comes George James George uses Dr Martins dye white tissue pur ple small brush Clo rox dye bleaches out unwanted areas Rapidograph pen handy small letters make edges trim large letters sharp Try next time want ultra-light job generally use Pres Bruning method sticking opaque letters color-doped tissue using spray rubber cement does add bit heavy some models Until next time thermals Send ideas pix etc pay used Bill Warner 423-C San Vicente Blvd. Santa Monica CA 90402 Bobcat/K ilsdonk continued page 42 ALL GRISH PROPELLERS ARE ENGINEERED TO TRUE 1-IELICAL PITCH AND AIRFOIL FOR EFFICIENCY 2 Blade Tractor 5-3each 5-45/a-35Y2-4304 6-36-4354 747-67-8504 8-48-68-8654 9-4g-6g-7 9-810-410-6854 11-411-611-8$1 12-412-512-6$150 2 Blade Pusher 5Y2-4 6-36-4354 8-6854 9-610-6$1 3 Blade Tractor 6-36-36-4 504 3 Blade Pusher 6-3504 Made polyester boll Color signed no-nonsense airfoil sheeted meets one-inch wing thickness rule need two rib except No 1 Glue ribs 1/4 X 3/s bottom spar leading edge Any new cyanoacrylates Hot-Stuff Zap etc recommended entire wing construction building openframe construction glue trailing edge sheeting followed LE center section rib cap strips fully sheeted wing completely sheeted bottom side bellcrank installed along wing tip skid mounts blind nuts USE TO PROPEL AIR CREATE THRUST AND PROPELLED BY AIR Metallic Aluminum Color 7-67-8$1 8-68-8$125 9-6 10-610-4$150 Pusher 10-6$150 entire top sheeted Dont forget stall pushrods before installing center top section sheeting wing tips can made either 1 balsa double thickness scrap a left over fuselage plank tips carved hollowed out shown Glue Titebond epoxy No wing tip weight required Finish sand sheeted surfaces 150 220 grit garnet paper wing done fuselage stab rudder very straightforward use tank re cessed fuselage shown install outboard plywood doubler first cut tips rib templates plans de product review product review product review cock$t fl coaming__ Cockpit Coaming extruded flexible black vinyl material pre-shaped fit around corner two sizes 3/32and 3/16 dia Price 2 feet size $195 Strut Fairing extruded rigid vinyl two sizes 3/32 1/8 lD packaged two 23 lengths Price size $225 Fourmost Racing Products 4040 24th Ave Forest Grove OR 97116 product review product review product review THIS FORM ND ATTACH MAILING XI5S~J ABEL FROM RECENT LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks re quired change address Attach current MA mailing label check appropriate box mail Subscription Dept Model Aviation 815 Fifteenth St. NW Washington DC 20005 Check appropriate boxenclose payment C NEW SUBSCRIPTION C CHANGE OF ADDRESS Non-AMA subscription rates $1200 12 months Canada United States possession elsewhere $1400 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 815 FIFTEENTH ST. NW. WASHINGTON DC 20005 April1978 97 GRISH AIRCRAFT TYPE PROPELLERS Made hardwood fully carved true helical pitch airfoil ready sanding ALL SIZES IN18$700 8 & 10 PITCH20800 221000 241300 AT YOUR DEALER RIGHT HAND ROTATION 318 BORE T DISCRETION OF HE PURCHASER 3 E PROPELLERS AT YOUR OALER Os G RUSH ST JOHN INDIANA 46373