Radio Control Electrics Bob Kopski JUNE almost ended some unusual Electric projects both beach aircreations some fellow fliers Two pictured herein both expected opera tional 1984 Electric Fly far largest Electric undertaking Ive ever beheld has seen believed Im purposely going name model builder now because Id like see can identify project plane shown framework begun January year photo April body 87 long stab span 40 three-piece wing totals 114 planned power installation four Mabuchi motors series-parallel up 32 12 Ah cells expected gross weight range 9-10 pounds wing loading about 16 oz course its going hand-launched OK wholl first guess what very unusual glider pictured month scale model Ken Stinson Ken scaled up three-view Ameri can Eaglet homebuilt did beautiful job 80-in model weighs about 38 oz controlled mixed rudder-eleva tor On-Off motor motor also homemade Ken employed engi neering department major East Coast motor manufacturer built own samarium cobalt four-brush motor job wanted Energy storage six 12 Ah cells writing plane has flown several times still need some trim glide very good high-aspect-ratio wing landing bit tricky anhedral tail assemblyflairouts strict NoNo Another tricky task launching cause pushing prop can sneak up knuckles real quick So far Kens hand fully intact no boundary modelers imaginations cant hurdle Nice job Ken Ive received letters both Electric series MA September 1983 June 1984 column question keeps popping up concerns availability written information Electric So help answer three other regular sources Electric formation know Ampere Flyera whole magazine devoted Electric interests comes us Belgium Advertising minimal always lot detailed infor mation 20-page typically maga zine also regular list known Electric events published articles around world including very own US of products dis cussed evaluated may readily available country does diminish basic education can monthly installments reading magazine Ampere Flyer publication since 1979 has its objective popularization use electric motors RC model planes availa ble Peter Blomniaart Rue Wauters 28 B 6200 Gosseies/Belgium annual subscription rate $25 Tell Peter ya read MA Next alphabetical order month ly Electric Power column Mitch Poling Model Builder Mitch may experienced Electric author country first came upon articles early Seventies now defunct publication just about time interest Electric germi nating found article about re winding automobile window-washer motor genuine help column very first thing look monthly MB arrives depending whats cover Finally no means last Jim Zarembskis bi-monthly Silent Powers column RCM Frankly dont under stand prestigious magazine can tolerate six Electric installments nually Doesnt Editor Don Dewey know Electric its its better now once wasfor past column appeared four times year Ive pleasure flying Jim two occasions Im looking forward Aside column Jim has also published several construction arti 60 Model Aviation Quessi Bob purposeiy falied identify Giant Eiectric project popuiar East Coast Eiectricer wlii have 4 Mabuchis poweri pieces atop 4 x 8-ft workbench stage compietlon three wing pieces weigh totai 12 oz fuselage 16 oz tail 6 oz Expect 1984 Eiectric Fly Ken Stinsons American Eaglet isa Scale pianel made high-tech motor too Airfoil i borrowed Spectra Soar Sailplane-lik design has excelient giide Landings tricky though inverted-V tail Prop 8-4 nyion des RCM designs keep show ing up Electric Fly again confess aside cover Jims work very first thing look monthly RCM Another Electric design example re cent Electric series showed plan own Electric project reason ably assured first-time success Ex amples described generally smaller less expensive power systems Now Id like offer example larger Electric design club everything group interests cover usual Gas stuff unusual amount Electric well Fun Flies necessity have offer something everyone despite good intentions sometimes difficult Electric fliers compete against Gas such category has historically fun-fly events include ground-handling aspect Ths situation has long bugged have long years wanted Electric would least allow participate such categories Besides Ive grown very tired hearing Electrics have hand-launched After much la bored thought planning designing wishing agonizing Eureka Greek Found conceived design follows MA Series Rules Thumb letter successful undertakings Specifi cally wanted sport plane would above else have ground-han dling capability automatically meant steerable nose gearno taildragitis Also plane repeated touch goes land stop taxi make several takeoffs wanted least five minutes flight intermixed requirements Heres design parameters shaped up studying past Electric series can same thing First since ground-handling pri mary importance put first emphasis Continued page 154 Bobs new Eurekaa 200-watt design ROGs readily does lots Touch-and-Gos mild aerobatics still getting over 5 mm air time per charge Twelve cells used 25-series motor has fiown Keller 25112 Astro 25 Super Ferrite Astro 25 Cobalt Keller motor came Leisure Electronics Bare frame L weighs 17 oz Designed built flown 3-week period ~PETITORPRO AuUamrobetic collective pitch plus OMOdSIWIthENYA6OX OS61FSR. 44995 hell 46995 9S6IFSRH hell 46995 Wstouuaos.e ThE AVAILASILITY OP MLT HJCOflflS BARON 20coliectiv pitch. 18995 BARON 50A MARK ID autorotation collective pitch .. 29995 BARON SOC custom dilective pitch36795 custom khead MK 1146195 o CUSTOM HELl-BOY collective pitch automatic tail rotor ~ndon&aerobIc kit 34995 OS61lSR35995 ENYA chrome hel37995 OS 6IFSRH hell37995 o SUPER MINI-BOY collectIve pitch autorotation tail ro torcompensation& aerebic kit ENYA 4OCX28495 ENYA 45CX29495 OS4OFSR28995 OS 45FSR29995 Send $2 fr complete ca ORDERING INFORMATION ALL ORDERS SHIPPED DAILY UPS 0425add350 $26$lOOadd450 $101-over add 600 LUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add jO% merchandise total C0D charge $165 Payment Eberles sinplytake order will endeavor COD orders- cash money order certified check se question may have will assist recommendingt] *enccertified check money order use credit card Pernal checks wit yout particular needs along prompt scait cat8iO~ 4We Sell HelIcoptea & FbiThem Wel 8Your Co-Pilot EvertburYou Ry Phone 4 12S669766 9-9 PN 586-7768 672 PITISBURGH RD BUTLER PA 16001 RC SoarlnglPruss Continued page 150 Symposium MARCs symposium such huge success last year scheduled November 3 4 year can plan attend both days can guaranteed time well spent further information contact Al Scidmore 5013 Dorsett Dr Madison WI 53711 Meanwhile papers 1983 sym posium available great addi tion library Topics include RC Sailplane Speed Events Stan Watson Can Afford Winch Al Scidmore Computer-A id ed Wing Construction Lee J Murray Sailplane Kits Scott Christensen Radio Systems Now Soon Peter Waters Composites Strength Low Weight Keith Scidmore much NSS Sailplane New President Na tional Soaring Society Don Chancey Don takes over Gene Shelkey served Soaring NSS excellent manner Thanks Gene best luck Don membership NSS years subscription Sailplane send $12 John Vogel 906 Orchard Park Dr Gibsonia PA 15044 time being read USA F3B team selection Finals will have held involving what no doubt strongest field finalists five selection flyoffs Lets sup port USA team Contributions can sent Ms Helen Olsen 8875 Ovieda Plaza Westminster CA 92683 Good Lift Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ElectrloslKopskl Continued page 61 Rule Thumb Two April l84 MA requires 50 watts motor power put per pound aircraft good ground-handling grass Also dis cussed reference 150 watts good minimum such plane went conservative established design goal minimum 200 watts available power throughout flightnot just right after charging also wanted sport designsomething could fly pretty well once off ground decided rudder elevator motor speed control would sufficient Long experience has shown wing load ing 16 oz per sq ft good nominal number such sport machine combined proven flat-bot tom airfoil would competitive Sig Kadets routinely well typical fun-fly events Taking basic numbers doing some simple arithmetic design parameters unfolded First 200 watts divided 50 watts/pound yields fourlb airplane desired 16 oz/sq ft wing loading requires four-sq-ft wing about 576 sq chose 10 x 60-in wing planform airfoil chose Davis 5because never tried wanted besides Pappy deBolt recommended ar 154 Model Aviation O HELICOP ENVA 6K ENYA Some enguim please order soon Ii RADIOS Airtronlcu & Kraft AIRTRONICS 6 channel hell standard JR Century seven 4501 servos mmli 5petb 8M Ringt ci wic H psdel offer Builders fWges gettIng try Isper Elm kt polyester resin tills building season offerlna Quart site *Vhardener $7N *9K retallj guarantee fast setting easy sending tack free drying Al. Auiuhf sU wGUim *k4 0mw Pmtu*l Pubm lmme mi Amusib 59 Nj Suer Ieiu 55. Iqh Ommer -i U Look fO U5 Ifi Send SASL favedle FREE CATALOG tar fast satvlUe CIII 101*47uMdSl00Aljipbg KINCRAFT MPG 14822 Tulmdge ct Auilmd KY 41101 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLYI ATTENTION SCALERS tides remainder model design straightforward nominal very close having Falcon 56 moments etc Rule Thumb Three advises Electric system components should make up about 40% 60% total model weight means about 38 oz total budget available power system three motors mind plane Astro Super Ferrite 25 Astro Cobalt 25 Keller 25/12 weigh 14 125 95 oz respec tively left about 25 oz nominal available battery 12 cells fits just fine prop motors appropriately achieve desired operating power level easily done turns out 10 x 6 firstand 9 x 6 last two does job comes static bench data taken Rule Thumb power input cruise about 4 lb x 16 oz/sq ft 64 watts Twice gets plane flying nicely needed about 130 watts average power input nominal fiveminute flight conservative charge battery about 65 Ampereminutes MA December 1983 could draw current average rate 65/5 13 Amps requires applied motor voltage 130/13 10 volts average 12-cell battery has nominal terminal voltage 13 14 volts Jomar speed control has something name ly reduce voltage average desired flight power time ground-handling takeoffs touch goes loops etc full throttle easily brings up power past 200 watts based previously-mentioned bench data course actual performance bit better conservative predictions because prop unloads air manifests itself longer flight time Average flight time date over 6A minutes flights included lots touch goes loops land taxi takeoffson grass field Now would say Rules Thumb work complete story some facts figures about Eureka completed wing weighs 85 oz Go back check Rule Thumb Four com plete airplane radio no power system parts weighs 275 oz 48 oz landing gear wheels way covering MonoKote radio flight pack 250 mAh prop weighs about ounce Remember quar ter-ouncesRule Thumb Five So guess what now Im bored real goal ground-handling machine worked out just great now Im planning new plane maybe just new wing flaps ailerons challenge after anotherthats what keeps Electric juice flowing hope larger Electric design ex ample proves helpful intent colunm basically seemed very appropriate See Elec trics dont have hand-launched Happy Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant ScalelBeckman Continued page 65 smaller models prime example Olean Sam Freys Enya 12-powered Laser 200 84-in-span model weighed 14 lb its performance amazing think Sam must have learned fly gymnasium would take off fly five ten minutes doing standard maneu vers some not-so-standard ones during whole flight dont think model ever 200 feet him direction time engine purring quietly could hardly hear back pits interesting model years rally Carl Dannenbowers DC-3 Yes Mortimer model picture sound two Quadras almost sync intoxicating its easy see few two- three- fourengine models around attract much tention Carl spent year-and-a-half creation working drawings Nick Ziroli Nick will have complete plans available later year Span 12 feet model weighs 50 lbs Power two Q35 Quadras swinging homemade FWfV1COMPLETE THIS FORM lLlEhEEEIEIEIP-AND ATTACH MAtLING IIlEXB1EIEhLEELABEL FROM RECENT required changeweeks ISSUE LET US KNOW WHERE YOU ARE GOING address Attach current MA mailing appropriate box mall SubscrtP Avtation 1810 Samuel Morse Dr NEW sumscRlPTlON 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessIons elsewhere includIng Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 71 P MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 October1984 155 EPOXY GLASS COWLS FOR NOSEPI PICA SID AIORGAM BALSA USA PLAIT CONCEPT FLEET HOSTETLER RCM T-CPAFT SHEBER P1173 & SCALE S UPER CUB POKKERO-7 BOEING P-72 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y AOACBRIENS WRBULENT CNRISIFN EAGLE BRISIGNELLAS STARDUSTER II A SCALE J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGRIARN 73B SCALE 7/4 SCALE DECA IJIAL 014 PIPER PA-SB & OTHERS WHEEL PANTS FOR CITABRIA STAROUS TER II PITTS SKYBOLT LJBERTYSPORT CHRIS TEN EAGLE PBS HAWKS STEARM4PS SlJNSON SR-B MULLIGAN & OTHERS DRAZED& NEAT-ThEATEDWIREGEARSbCADANES LARGE SCALE PlANS AVAILABLE Send $100 latest list supply Modelers libergiawa parts plansWrite call ua T BERGLASS SPECIALTIES 30925 BLOCK GARDEN CItY MI 48135 PHONE 313 4214358 1131 NW 45 Street Ft tauderdute FL 33309 13051 491-6115 ENGINEERING THE LANDING GEAR PEOPLE Tired kit indict gears dent tit higglC property II & B Engineenog ceo sotne probtems * Custom haitI needs & specs guarauteed lit * Strong & durohte withstand taugtasst boding * II & 0 Eogneeriog gear will work & keep year higgie Itying * to stuck reptacement gear tsr poputar models gyren PIlls Chrtsteo Eagle CAP 21 Satss lISA J-3 CIII Air Tech Pownee Eagle Nasco Big Stick Champ Cilahila & H madets Soapper Stinger Suapper Tun y5RffE Easy use part no mis paint system Ho mixing Ho waiting Fast drying extremely fuel proof Formulated iust modeler covers surfaces paints resins Send free instruction brochure BUY IT YOULL LIKE IT SIG MFG COMontezuma IA 50171 Fooled DC-3 Bob showed earlier really modela beauty Carl Dannen bower Its really flown yetonly lIfted off during high-speed taxi run
Edition: Model Aviation - 1984/10
Page Numbers: 60, 61, 154, 155
Radio Control Electrics Bob Kopski JUNE almost ended some unusual Electric projects both beach aircreations some fellow fliers Two pictured herein both expected opera tional 1984 Electric Fly far largest Electric undertaking Ive ever beheld has seen believed Im purposely going name model builder now because Id like see can identify project plane shown framework begun January year photo April body 87 long stab span 40 three-piece wing totals 114 planned power installation four Mabuchi motors series-parallel up 32 12 Ah cells expected gross weight range 9-10 pounds wing loading about 16 oz course its going hand-launched OK wholl first guess what very unusual glider pictured month scale model Ken Stinson Ken scaled up three-view Ameri can Eaglet homebuilt did beautiful job 80-in model weighs about 38 oz controlled mixed rudder-eleva tor On-Off motor motor also homemade Ken employed engi neering department major East Coast motor manufacturer built own samarium cobalt four-brush motor job wanted Energy storage six 12 Ah cells writing plane has flown several times still need some trim glide very good high-aspect-ratio wing landing bit tricky anhedral tail assemblyflairouts strict NoNo Another tricky task launching cause pushing prop can sneak up knuckles real quick So far Kens hand fully intact no boundary modelers imaginations cant hurdle Nice job Ken Ive received letters both Electric series MA September 1983 June 1984 column question keeps popping up concerns availability written information Electric So help answer three other regular sources Electric formation know Ampere Flyera whole magazine devoted Electric interests comes us Belgium Advertising minimal always lot detailed infor mation 20-page typically maga zine also regular list known Electric events published articles around world including very own US of products dis cussed evaluated may readily available country does diminish basic education can monthly installments reading magazine Ampere Flyer publication since 1979 has its objective popularization use electric motors RC model planes availa ble Peter Blomniaart Rue Wauters 28 B 6200 Gosseies/Belgium annual subscription rate $25 Tell Peter ya read MA Next alphabetical order month ly Electric Power column Mitch Poling Model Builder Mitch may experienced Electric author country first came upon articles early Seventies now defunct publication just about time interest Electric germi nating found article about re winding automobile window-washer motor genuine help column very first thing look monthly MB arrives depending whats cover Finally no means last Jim Zarembskis bi-monthly Silent Powers column RCM Frankly dont under stand prestigious magazine can tolerate six Electric installments nually Doesnt Editor Don Dewey know Electric its its better now once wasfor past column appeared four times year Ive pleasure flying Jim two occasions Im looking forward Aside column Jim has also published several construction arti 60 Model Aviation Quessi Bob purposeiy falied identify Giant Eiectric project popuiar East Coast Eiectricer wlii have 4 Mabuchis poweri pieces atop 4 x 8-ft workbench stage compietlon three wing pieces weigh totai 12 oz fuselage 16 oz tail 6 oz Expect 1984 Eiectric Fly Ken Stinsons American Eaglet isa Scale pianel made high-tech motor too Airfoil i borrowed Spectra Soar Sailplane-lik design has excelient giide Landings tricky though inverted-V tail Prop 8-4 nyion des RCM designs keep show ing up Electric Fly again confess aside cover Jims work very first thing look monthly RCM Another Electric design example re cent Electric series showed plan own Electric project reason ably assured first-time success Ex amples described generally smaller less expensive power systems Now Id like offer example larger Electric design club everything group interests cover usual Gas stuff unusual amount Electric well Fun Flies necessity have offer something everyone despite good intentions sometimes difficult Electric fliers compete against Gas such category has historically fun-fly events include ground-handling aspect Ths situation has long bugged have long years wanted Electric would least allow participate such categories Besides Ive grown very tired hearing Electrics have hand-launched After much la bored thought planning designing wishing agonizing Eureka Greek Found conceived design follows MA Series Rules Thumb letter successful undertakings Specifi cally wanted sport plane would above else have ground-han dling capability automatically meant steerable nose gearno taildragitis Also plane repeated touch goes land stop taxi make several takeoffs wanted least five minutes flight intermixed requirements Heres design parameters shaped up studying past Electric series can same thing First since ground-handling pri mary importance put first emphasis Continued page 154 Bobs new Eurekaa 200-watt design ROGs readily does lots Touch-and-Gos mild aerobatics still getting over 5 mm air time per charge Twelve cells used 25-series motor has fiown Keller 25112 Astro 25 Super Ferrite Astro 25 Cobalt Keller motor came Leisure Electronics Bare frame L weighs 17 oz Designed built flown 3-week period ~PETITORPRO AuUamrobetic collective pitch plus OMOdSIWIthENYA6OX OS61FSR. 44995 hell 46995 9S6IFSRH hell 46995 Wstouuaos.e ThE AVAILASILITY OP MLT HJCOflflS BARON 20coliectiv pitch. 18995 BARON 50A MARK ID autorotation collective pitch .. 29995 BARON SOC custom dilective pitch36795 custom khead MK 1146195 o CUSTOM HELl-BOY collective pitch automatic tail rotor ~ndon&aerobIc kit 34995 OS61lSR35995 ENYA chrome hel37995 OS 6IFSRH hell37995 o SUPER MINI-BOY collectIve pitch autorotation tail ro torcompensation& aerebic kit ENYA 4OCX28495 ENYA 45CX29495 OS4OFSR28995 OS 45FSR29995 Send $2 fr complete ca ORDERING INFORMATION ALL ORDERS SHIPPED DAILY UPS 0425add350 $26$lOOadd450 $101-over add 600 LUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add jO% merchandise total C0D charge $165 Payment Eberles sinplytake order will endeavor COD orders- cash money order certified check se question may have will assist recommendingt] *enccertified check money order use credit card Pernal checks wit yout particular needs along prompt scait cat8iO~ 4We Sell HelIcoptea & FbiThem Wel 8Your Co-Pilot EvertburYou Ry Phone 4 12S669766 9-9 PN 586-7768 672 PITISBURGH RD BUTLER PA 16001 RC SoarlnglPruss Continued page 150 Symposium MARCs symposium such huge success last year scheduled November 3 4 year can plan attend both days can guaranteed time well spent further information contact Al Scidmore 5013 Dorsett Dr Madison WI 53711 Meanwhile papers 1983 sym posium available great addi tion library Topics include RC Sailplane Speed Events Stan Watson Can Afford Winch Al Scidmore Computer-A id ed Wing Construction Lee J Murray Sailplane Kits Scott Christensen Radio Systems Now Soon Peter Waters Composites Strength Low Weight Keith Scidmore much NSS Sailplane New President Na tional Soaring Society Don Chancey Don takes over Gene Shelkey served Soaring NSS excellent manner Thanks Gene best luck Don membership NSS years subscription Sailplane send $12 John Vogel 906 Orchard Park Dr Gibsonia PA 15044 time being read USA F3B team selection Finals will have held involving what no doubt strongest field finalists five selection flyoffs Lets sup port USA team Contributions can sent Ms Helen Olsen 8875 Ovieda Plaza Westminster CA 92683 Good Lift Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ElectrloslKopskl Continued page 61 Rule Thumb Two April l84 MA requires 50 watts motor power put per pound aircraft good ground-handling grass Also dis cussed reference 150 watts good minimum such plane went conservative established design goal minimum 200 watts available power throughout flightnot just right after charging also wanted sport designsomething could fly pretty well once off ground decided rudder elevator motor speed control would sufficient Long experience has shown wing load ing 16 oz per sq ft good nominal number such sport machine combined proven flat-bot tom airfoil would competitive Sig Kadets routinely well typical fun-fly events Taking basic numbers doing some simple arithmetic design parameters unfolded First 200 watts divided 50 watts/pound yields fourlb airplane desired 16 oz/sq ft wing loading requires four-sq-ft wing about 576 sq chose 10 x 60-in wing planform airfoil chose Davis 5because never tried wanted besides Pappy deBolt recommended ar 154 Model Aviation O HELICOP ENVA 6K ENYA Some enguim please order soon Ii RADIOS Airtronlcu & Kraft AIRTRONICS 6 channel hell standard JR Century seven 4501 servos mmli 5petb 8M Ringt ci wic H psdel offer Builders fWges gettIng try Isper Elm kt polyester resin tills building season offerlna Quart site *Vhardener $7N *9K retallj guarantee fast setting easy sending tack free drying Al. Auiuhf sU wGUim *k4 0mw Pmtu*l Pubm lmme mi Amusib 59 Nj Suer Ieiu 55. Iqh Ommer -i U Look fO U5 Ifi Send SASL favedle FREE CATALOG tar fast satvlUe CIII 101*47uMdSl00Aljipbg KINCRAFT MPG 14822 Tulmdge ct Auilmd KY 41101 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLYI ATTENTION SCALERS tides remainder model design straightforward nominal very close having Falcon 56 moments etc Rule Thumb Three advises Electric system components should make up about 40% 60% total model weight means about 38 oz total budget available power system three motors mind plane Astro Super Ferrite 25 Astro Cobalt 25 Keller 25/12 weigh 14 125 95 oz respec tively left about 25 oz nominal available battery 12 cells fits just fine prop motors appropriately achieve desired operating power level easily done turns out 10 x 6 firstand 9 x 6 last two does job comes static bench data taken Rule Thumb power input cruise about 4 lb x 16 oz/sq ft 64 watts Twice gets plane flying nicely needed about 130 watts average power input nominal fiveminute flight conservative charge battery about 65 Ampereminutes MA December 1983 could draw current average rate 65/5 13 Amps requires applied motor voltage 130/13 10 volts average 12-cell battery has nominal terminal voltage 13 14 volts Jomar speed control has something name ly reduce voltage average desired flight power time ground-handling takeoffs touch goes loops etc full throttle easily brings up power past 200 watts based previously-mentioned bench data course actual performance bit better conservative predictions because prop unloads air manifests itself longer flight time Average flight time date over 6A minutes flights included lots touch goes loops land taxi takeoffson grass field Now would say Rules Thumb work complete story some facts figures about Eureka completed wing weighs 85 oz Go back check Rule Thumb Four com plete airplane radio no power system parts weighs 275 oz 48 oz landing gear wheels way covering MonoKote radio flight pack 250 mAh prop weighs about ounce Remember quar ter-ouncesRule Thumb Five So guess what now Im bored real goal ground-handling machine worked out just great now Im planning new plane maybe just new wing flaps ailerons challenge after anotherthats what keeps Electric juice flowing hope larger Electric design ex ample proves helpful intent colunm basically seemed very appropriate See Elec trics dont have hand-launched Happy Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant ScalelBeckman Continued page 65 smaller models prime example Olean Sam Freys Enya 12-powered Laser 200 84-in-span model weighed 14 lb its performance amazing think Sam must have learned fly gymnasium would take off fly five ten minutes doing standard maneu vers some not-so-standard ones during whole flight dont think model ever 200 feet him direction time engine purring quietly could hardly hear back pits interesting model years rally Carl Dannenbowers DC-3 Yes Mortimer model picture sound two Quadras almost sync intoxicating its easy see few two- three- fourengine models around attract much tention Carl spent year-and-a-half creation working drawings Nick Ziroli Nick will have complete plans available later year Span 12 feet model weighs 50 lbs Power two Q35 Quadras swinging homemade FWfV1COMPLETE THIS FORM lLlEhEEEIEIEIP-AND ATTACH MAtLING IIlEXB1EIEhLEELABEL FROM RECENT required changeweeks ISSUE LET US KNOW WHERE YOU ARE GOING address Attach current MA mailing appropriate box mall SubscrtP Avtation 1810 Samuel Morse Dr NEW sumscRlPTlON 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessIons elsewhere includIng Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 71 P MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 October1984 155 EPOXY GLASS COWLS FOR NOSEPI PICA SID AIORGAM BALSA USA PLAIT CONCEPT FLEET HOSTETLER RCM T-CPAFT SHEBER P1173 & SCALE S UPER CUB POKKERO-7 BOEING P-72 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y AOACBRIENS WRBULENT CNRISIFN EAGLE BRISIGNELLAS STARDUSTER II A SCALE J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGRIARN 73B SCALE 7/4 SCALE DECA IJIAL 014 PIPER PA-SB & OTHERS WHEEL PANTS FOR CITABRIA STAROUS TER II PITTS SKYBOLT LJBERTYSPORT CHRIS TEN EAGLE PBS HAWKS STEARM4PS SlJNSON SR-B MULLIGAN & OTHERS DRAZED& NEAT-ThEATEDWIREGEARSbCADANES LARGE SCALE PlANS AVAILABLE Send $100 latest list supply Modelers libergiawa parts plansWrite call ua T BERGLASS SPECIALTIES 30925 BLOCK GARDEN CItY MI 48135 PHONE 313 4214358 1131 NW 45 Street Ft tauderdute FL 33309 13051 491-6115 ENGINEERING THE LANDING GEAR PEOPLE Tired kit indict gears dent tit higglC property II & B Engineenog ceo sotne probtems * Custom haitI needs & specs guarauteed lit * Strong & durohte withstand taugtasst boding * II & 0 Eogneeriog gear will work & keep year higgie Itying * to stuck reptacement gear tsr poputar models gyren PIlls Chrtsteo Eagle CAP 21 Satss lISA J-3 CIII Air Tech Pownee Eagle Nasco Big Stick Champ Cilahila & H madets Soapper Stinger Suapper Tun y5RffE Easy use part no mis paint system Ho mixing Ho waiting Fast drying extremely fuel proof Formulated iust modeler covers surfaces paints resins Send free instruction brochure BUY IT YOULL LIKE IT SIG MFG COMontezuma IA 50171 Fooled DC-3 Bob showed earlier really modela beauty Carl Dannen bower Its really flown yetonly lIfted off during high-speed taxi run
Edition: Model Aviation - 1984/10
Page Numbers: 60, 61, 154, 155
Radio Control Electrics Bob Kopski JUNE almost ended some unusual Electric projects both beach aircreations some fellow fliers Two pictured herein both expected opera tional 1984 Electric Fly far largest Electric undertaking Ive ever beheld has seen believed Im purposely going name model builder now because Id like see can identify project plane shown framework begun January year photo April body 87 long stab span 40 three-piece wing totals 114 planned power installation four Mabuchi motors series-parallel up 32 12 Ah cells expected gross weight range 9-10 pounds wing loading about 16 oz course its going hand-launched OK wholl first guess what very unusual glider pictured month scale model Ken Stinson Ken scaled up three-view Ameri can Eaglet homebuilt did beautiful job 80-in model weighs about 38 oz controlled mixed rudder-eleva tor On-Off motor motor also homemade Ken employed engi neering department major East Coast motor manufacturer built own samarium cobalt four-brush motor job wanted Energy storage six 12 Ah cells writing plane has flown several times still need some trim glide very good high-aspect-ratio wing landing bit tricky anhedral tail assemblyflairouts strict NoNo Another tricky task launching cause pushing prop can sneak up knuckles real quick So far Kens hand fully intact no boundary modelers imaginations cant hurdle Nice job Ken Ive received letters both Electric series MA September 1983 June 1984 column question keeps popping up concerns availability written information Electric So help answer three other regular sources Electric formation know Ampere Flyera whole magazine devoted Electric interests comes us Belgium Advertising minimal always lot detailed infor mation 20-page typically maga zine also regular list known Electric events published articles around world including very own US of products dis cussed evaluated may readily available country does diminish basic education can monthly installments reading magazine Ampere Flyer publication since 1979 has its objective popularization use electric motors RC model planes availa ble Peter Blomniaart Rue Wauters 28 B 6200 Gosseies/Belgium annual subscription rate $25 Tell Peter ya read MA Next alphabetical order month ly Electric Power column Mitch Poling Model Builder Mitch may experienced Electric author country first came upon articles early Seventies now defunct publication just about time interest Electric germi nating found article about re winding automobile window-washer motor genuine help column very first thing look monthly MB arrives depending whats cover Finally no means last Jim Zarembskis bi-monthly Silent Powers column RCM Frankly dont under stand prestigious magazine can tolerate six Electric installments nually Doesnt Editor Don Dewey know Electric its its better now once wasfor past column appeared four times year Ive pleasure flying Jim two occasions Im looking forward Aside column Jim has also published several construction arti 60 Model Aviation Quessi Bob purposeiy falied identify Giant Eiectric project popuiar East Coast Eiectricer wlii have 4 Mabuchis poweri pieces atop 4 x 8-ft workbench stage compietlon three wing pieces weigh totai 12 oz fuselage 16 oz tail 6 oz Expect 1984 Eiectric Fly Ken Stinsons American Eaglet isa Scale pianel made high-tech motor too Airfoil i borrowed Spectra Soar Sailplane-lik design has excelient giide Landings tricky though inverted-V tail Prop 8-4 nyion des RCM designs keep show ing up Electric Fly again confess aside cover Jims work very first thing look monthly RCM Another Electric design example re cent Electric series showed plan own Electric project reason ably assured first-time success Ex amples described generally smaller less expensive power systems Now Id like offer example larger Electric design club everything group interests cover usual Gas stuff unusual amount Electric well Fun Flies necessity have offer something everyone despite good intentions sometimes difficult Electric fliers compete against Gas such category has historically fun-fly events include ground-handling aspect Ths situation has long bugged have long years wanted Electric would least allow participate such categories Besides Ive grown very tired hearing Electrics have hand-launched After much la bored thought planning designing wishing agonizing Eureka Greek Found conceived design follows MA Series Rules Thumb letter successful undertakings Specifi cally wanted sport plane would above else have ground-han dling capability automatically meant steerable nose gearno taildragitis Also plane repeated touch goes land stop taxi make several takeoffs wanted least five minutes flight intermixed requirements Heres design parameters shaped up studying past Electric series can same thing First since ground-handling pri mary importance put first emphasis Continued page 154 Bobs new Eurekaa 200-watt design ROGs readily does lots Touch-and-Gos mild aerobatics still getting over 5 mm air time per charge Twelve cells used 25-series motor has fiown Keller 25112 Astro 25 Super Ferrite Astro 25 Cobalt Keller motor came Leisure Electronics Bare frame L weighs 17 oz Designed built flown 3-week period ~PETITORPRO AuUamrobetic collective pitch plus OMOdSIWIthENYA6OX OS61FSR. 44995 hell 46995 9S6IFSRH hell 46995 Wstouuaos.e ThE AVAILASILITY OP MLT HJCOflflS BARON 20coliectiv pitch. 18995 BARON 50A MARK ID autorotation collective pitch .. 29995 BARON SOC custom dilective pitch36795 custom khead MK 1146195 o CUSTOM HELl-BOY collective pitch automatic tail rotor ~ndon&aerobIc kit 34995 OS61lSR35995 ENYA chrome hel37995 OS 6IFSRH hell37995 o SUPER MINI-BOY collectIve pitch autorotation tail ro torcompensation& aerebic kit ENYA 4OCX28495 ENYA 45CX29495 OS4OFSR28995 OS 45FSR29995 Send $2 fr complete ca ORDERING INFORMATION ALL ORDERS SHIPPED DAILY UPS 0425add350 $26$lOOadd450 $101-over add 600 LUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add jO% merchandise total C0D charge $165 Payment Eberles sinplytake order will endeavor COD orders- cash money order certified check se question may have will assist recommendingt] *enccertified check money order use credit card Pernal checks wit yout particular needs along prompt scait cat8iO~ 4We Sell HelIcoptea & FbiThem Wel 8Your Co-Pilot EvertburYou Ry Phone 4 12S669766 9-9 PN 586-7768 672 PITISBURGH RD BUTLER PA 16001 RC SoarlnglPruss Continued page 150 Symposium MARCs symposium such huge success last year scheduled November 3 4 year can plan attend both days can guaranteed time well spent further information contact Al Scidmore 5013 Dorsett Dr Madison WI 53711 Meanwhile papers 1983 sym posium available great addi tion library Topics include RC Sailplane Speed Events Stan Watson Can Afford Winch Al Scidmore Computer-A id ed Wing Construction Lee J Murray Sailplane Kits Scott Christensen Radio Systems Now Soon Peter Waters Composites Strength Low Weight Keith Scidmore much NSS Sailplane New President Na tional Soaring Society Don Chancey Don takes over Gene Shelkey served Soaring NSS excellent manner Thanks Gene best luck Don membership NSS years subscription Sailplane send $12 John Vogel 906 Orchard Park Dr Gibsonia PA 15044 time being read USA F3B team selection Finals will have held involving what no doubt strongest field finalists five selection flyoffs Lets sup port USA team Contributions can sent Ms Helen Olsen 8875 Ovieda Plaza Westminster CA 92683 Good Lift Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ElectrloslKopskl Continued page 61 Rule Thumb Two April l84 MA requires 50 watts motor power put per pound aircraft good ground-handling grass Also dis cussed reference 150 watts good minimum such plane went conservative established design goal minimum 200 watts available power throughout flightnot just right after charging also wanted sport designsomething could fly pretty well once off ground decided rudder elevator motor speed control would sufficient Long experience has shown wing load ing 16 oz per sq ft good nominal number such sport machine combined proven flat-bot tom airfoil would competitive Sig Kadets routinely well typical fun-fly events Taking basic numbers doing some simple arithmetic design parameters unfolded First 200 watts divided 50 watts/pound yields fourlb airplane desired 16 oz/sq ft wing loading requires four-sq-ft wing about 576 sq chose 10 x 60-in wing planform airfoil chose Davis 5because never tried wanted besides Pappy deBolt recommended ar 154 Model Aviation O HELICOP ENVA 6K ENYA Some enguim please order soon Ii RADIOS Airtronlcu & Kraft AIRTRONICS 6 channel hell standard JR Century seven 4501 servos mmli 5petb 8M Ringt ci wic H psdel offer Builders fWges gettIng try Isper Elm kt polyester resin tills building season offerlna Quart site *Vhardener $7N *9K retallj guarantee fast setting easy sending tack free drying Al. Auiuhf sU wGUim *k4 0mw Pmtu*l Pubm lmme mi Amusib 59 Nj Suer Ieiu 55. Iqh Ommer -i U Look fO U5 Ifi Send SASL favedle FREE CATALOG tar fast satvlUe CIII 101*47uMdSl00Aljipbg KINCRAFT MPG 14822 Tulmdge ct Auilmd KY 41101 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLYI ATTENTION SCALERS tides remainder model design straightforward nominal very close having Falcon 56 moments etc Rule Thumb Three advises Electric system components should make up about 40% 60% total model weight means about 38 oz total budget available power system three motors mind plane Astro Super Ferrite 25 Astro Cobalt 25 Keller 25/12 weigh 14 125 95 oz respec tively left about 25 oz nominal available battery 12 cells fits just fine prop motors appropriately achieve desired operating power level easily done turns out 10 x 6 firstand 9 x 6 last two does job comes static bench data taken Rule Thumb power input cruise about 4 lb x 16 oz/sq ft 64 watts Twice gets plane flying nicely needed about 130 watts average power input nominal fiveminute flight conservative charge battery about 65 Ampereminutes MA December 1983 could draw current average rate 65/5 13 Amps requires applied motor voltage 130/13 10 volts average 12-cell battery has nominal terminal voltage 13 14 volts Jomar speed control has something name ly reduce voltage average desired flight power time ground-handling takeoffs touch goes loops etc full throttle easily brings up power past 200 watts based previously-mentioned bench data course actual performance bit better conservative predictions because prop unloads air manifests itself longer flight time Average flight time date over 6A minutes flights included lots touch goes loops land taxi takeoffson grass field Now would say Rules Thumb work complete story some facts figures about Eureka completed wing weighs 85 oz Go back check Rule Thumb Four com plete airplane radio no power system parts weighs 275 oz 48 oz landing gear wheels way covering MonoKote radio flight pack 250 mAh prop weighs about ounce Remember quar ter-ouncesRule Thumb Five So guess what now Im bored real goal ground-handling machine worked out just great now Im planning new plane maybe just new wing flaps ailerons challenge after anotherthats what keeps Electric juice flowing hope larger Electric design ex ample proves helpful intent colunm basically seemed very appropriate See Elec trics dont have hand-launched Happy Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant ScalelBeckman Continued page 65 smaller models prime example Olean Sam Freys Enya 12-powered Laser 200 84-in-span model weighed 14 lb its performance amazing think Sam must have learned fly gymnasium would take off fly five ten minutes doing standard maneu vers some not-so-standard ones during whole flight dont think model ever 200 feet him direction time engine purring quietly could hardly hear back pits interesting model years rally Carl Dannenbowers DC-3 Yes Mortimer model picture sound two Quadras almost sync intoxicating its easy see few two- three- fourengine models around attract much tention Carl spent year-and-a-half creation working drawings Nick Ziroli Nick will have complete plans available later year Span 12 feet model weighs 50 lbs Power two Q35 Quadras swinging homemade FWfV1COMPLETE THIS FORM lLlEhEEEIEIEIP-AND ATTACH MAtLING IIlEXB1EIEhLEELABEL FROM RECENT required changeweeks ISSUE LET US KNOW WHERE YOU ARE GOING address Attach current MA mailing appropriate box mall SubscrtP Avtation 1810 Samuel Morse Dr NEW sumscRlPTlON 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessIons elsewhere includIng Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 71 P MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 October1984 155 EPOXY GLASS COWLS FOR NOSEPI PICA SID AIORGAM BALSA USA PLAIT CONCEPT FLEET HOSTETLER RCM T-CPAFT SHEBER P1173 & SCALE S UPER CUB POKKERO-7 BOEING P-72 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y AOACBRIENS WRBULENT CNRISIFN EAGLE BRISIGNELLAS STARDUSTER II A SCALE J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGRIARN 73B SCALE 7/4 SCALE DECA IJIAL 014 PIPER PA-SB & OTHERS WHEEL PANTS FOR CITABRIA STAROUS TER II PITTS SKYBOLT LJBERTYSPORT CHRIS TEN EAGLE PBS HAWKS STEARM4PS SlJNSON SR-B MULLIGAN & OTHERS DRAZED& NEAT-ThEATEDWIREGEARSbCADANES LARGE SCALE PlANS AVAILABLE Send $100 latest list supply Modelers libergiawa parts plansWrite call ua T BERGLASS SPECIALTIES 30925 BLOCK GARDEN CItY MI 48135 PHONE 313 4214358 1131 NW 45 Street Ft tauderdute FL 33309 13051 491-6115 ENGINEERING THE LANDING GEAR PEOPLE Tired kit indict gears dent tit higglC property II & B Engineenog ceo sotne probtems * Custom haitI needs & specs guarauteed lit * Strong & durohte withstand taugtasst boding * II & 0 Eogneeriog gear will work & keep year higgie Itying * to stuck reptacement gear tsr poputar models gyren PIlls Chrtsteo Eagle CAP 21 Satss lISA J-3 CIII Air Tech Pownee Eagle Nasco Big Stick Champ Cilahila & H madets Soapper Stinger Suapper Tun y5RffE Easy use part no mis paint system Ho mixing Ho waiting Fast drying extremely fuel proof Formulated iust modeler covers surfaces paints resins Send free instruction brochure BUY IT YOULL LIKE IT SIG MFG COMontezuma IA 50171 Fooled DC-3 Bob showed earlier really modela beauty Carl Dannen bower Its really flown yetonly lIfted off during high-speed taxi run
Edition: Model Aviation - 1984/10
Page Numbers: 60, 61, 154, 155
Radio Control Electrics Bob Kopski JUNE almost ended some unusual Electric projects both beach aircreations some fellow fliers Two pictured herein both expected opera tional 1984 Electric Fly far largest Electric undertaking Ive ever beheld has seen believed Im purposely going name model builder now because Id like see can identify project plane shown framework begun January year photo April body 87 long stab span 40 three-piece wing totals 114 planned power installation four Mabuchi motors series-parallel up 32 12 Ah cells expected gross weight range 9-10 pounds wing loading about 16 oz course its going hand-launched OK wholl first guess what very unusual glider pictured month scale model Ken Stinson Ken scaled up three-view Ameri can Eaglet homebuilt did beautiful job 80-in model weighs about 38 oz controlled mixed rudder-eleva tor On-Off motor motor also homemade Ken employed engi neering department major East Coast motor manufacturer built own samarium cobalt four-brush motor job wanted Energy storage six 12 Ah cells writing plane has flown several times still need some trim glide very good high-aspect-ratio wing landing bit tricky anhedral tail assemblyflairouts strict NoNo Another tricky task launching cause pushing prop can sneak up knuckles real quick So far Kens hand fully intact no boundary modelers imaginations cant hurdle Nice job Ken Ive received letters both Electric series MA September 1983 June 1984 column question keeps popping up concerns availability written information Electric So help answer three other regular sources Electric formation know Ampere Flyera whole magazine devoted Electric interests comes us Belgium Advertising minimal always lot detailed infor mation 20-page typically maga zine also regular list known Electric events published articles around world including very own US of products dis cussed evaluated may readily available country does diminish basic education can monthly installments reading magazine Ampere Flyer publication since 1979 has its objective popularization use electric motors RC model planes availa ble Peter Blomniaart Rue Wauters 28 B 6200 Gosseies/Belgium annual subscription rate $25 Tell Peter ya read MA Next alphabetical order month ly Electric Power column Mitch Poling Model Builder Mitch may experienced Electric author country first came upon articles early Seventies now defunct publication just about time interest Electric germi nating found article about re winding automobile window-washer motor genuine help column very first thing look monthly MB arrives depending whats cover Finally no means last Jim Zarembskis bi-monthly Silent Powers column RCM Frankly dont under stand prestigious magazine can tolerate six Electric installments nually Doesnt Editor Don Dewey know Electric its its better now once wasfor past column appeared four times year Ive pleasure flying Jim two occasions Im looking forward Aside column Jim has also published several construction arti 60 Model Aviation Quessi Bob purposeiy falied identify Giant Eiectric project popuiar East Coast Eiectricer wlii have 4 Mabuchis poweri pieces atop 4 x 8-ft workbench stage compietlon three wing pieces weigh totai 12 oz fuselage 16 oz tail 6 oz Expect 1984 Eiectric Fly Ken Stinsons American Eaglet isa Scale pianel made high-tech motor too Airfoil i borrowed Spectra Soar Sailplane-lik design has excelient giide Landings tricky though inverted-V tail Prop 8-4 nyion des RCM designs keep show ing up Electric Fly again confess aside cover Jims work very first thing look monthly RCM Another Electric design example re cent Electric series showed plan own Electric project reason ably assured first-time success Ex amples described generally smaller less expensive power systems Now Id like offer example larger Electric design club everything group interests cover usual Gas stuff unusual amount Electric well Fun Flies necessity have offer something everyone despite good intentions sometimes difficult Electric fliers compete against Gas such category has historically fun-fly events include ground-handling aspect Ths situation has long bugged have long years wanted Electric would least allow participate such categories Besides Ive grown very tired hearing Electrics have hand-launched After much la bored thought planning designing wishing agonizing Eureka Greek Found conceived design follows MA Series Rules Thumb letter successful undertakings Specifi cally wanted sport plane would above else have ground-han dling capability automatically meant steerable nose gearno taildragitis Also plane repeated touch goes land stop taxi make several takeoffs wanted least five minutes flight intermixed requirements Heres design parameters shaped up studying past Electric series can same thing First since ground-handling pri mary importance put first emphasis Continued page 154 Bobs new Eurekaa 200-watt design ROGs readily does lots Touch-and-Gos mild aerobatics still getting over 5 mm air time per charge Twelve cells used 25-series motor has fiown Keller 25112 Astro 25 Super Ferrite Astro 25 Cobalt Keller motor came Leisure Electronics Bare frame L weighs 17 oz Designed built flown 3-week period ~PETITORPRO AuUamrobetic collective pitch plus OMOdSIWIthENYA6OX OS61FSR. 44995 hell 46995 9S6IFSRH hell 46995 Wstouuaos.e ThE AVAILASILITY OP MLT HJCOflflS BARON 20coliectiv pitch. 18995 BARON 50A MARK ID autorotation collective pitch .. 29995 BARON SOC custom dilective pitch36795 custom khead MK 1146195 o CUSTOM HELl-BOY collective pitch automatic tail rotor ~ndon&aerobIc kit 34995 OS61lSR35995 ENYA chrome hel37995 OS 6IFSRH hell37995 o SUPER MINI-BOY collectIve pitch autorotation tail ro torcompensation& aerebic kit ENYA 4OCX28495 ENYA 45CX29495 OS4OFSR28995 OS 45FSR29995 Send $2 fr complete ca ORDERING INFORMATION ALL ORDERS SHIPPED DAILY UPS 0425add350 $26$lOOadd450 $101-over add 600 LUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add jO% merchandise total C0D charge $165 Payment Eberles sinplytake order will endeavor COD orders- cash money order certified check se question may have will assist recommendingt] *enccertified check money order use credit card Pernal checks wit yout particular needs along prompt scait cat8iO~ 4We Sell HelIcoptea & FbiThem Wel 8Your Co-Pilot EvertburYou Ry Phone 4 12S669766 9-9 PN 586-7768 672 PITISBURGH RD BUTLER PA 16001 RC SoarlnglPruss Continued page 150 Symposium MARCs symposium such huge success last year scheduled November 3 4 year can plan attend both days can guaranteed time well spent further information contact Al Scidmore 5013 Dorsett Dr Madison WI 53711 Meanwhile papers 1983 sym posium available great addi tion library Topics include RC Sailplane Speed Events Stan Watson Can Afford Winch Al Scidmore Computer-A id ed Wing Construction Lee J Murray Sailplane Kits Scott Christensen Radio Systems Now Soon Peter Waters Composites Strength Low Weight Keith Scidmore much NSS Sailplane New President Na tional Soaring Society Don Chancey Don takes over Gene Shelkey served Soaring NSS excellent manner Thanks Gene best luck Don membership NSS years subscription Sailplane send $12 John Vogel 906 Orchard Park Dr Gibsonia PA 15044 time being read USA F3B team selection Finals will have held involving what no doubt strongest field finalists five selection flyoffs Lets sup port USA team Contributions can sent Ms Helen Olsen 8875 Ovieda Plaza Westminster CA 92683 Good Lift Dan Pruss 131 E Pennington Ln Plainfield IL 60544 RC ElectrloslKopskl Continued page 61 Rule Thumb Two April l84 MA requires 50 watts motor power put per pound aircraft good ground-handling grass Also dis cussed reference 150 watts good minimum such plane went conservative established design goal minimum 200 watts available power throughout flightnot just right after charging also wanted sport designsomething could fly pretty well once off ground decided rudder elevator motor speed control would sufficient Long experience has shown wing load ing 16 oz per sq ft good nominal number such sport machine combined proven flat-bot tom airfoil would competitive Sig Kadets routinely well typical fun-fly events Taking basic numbers doing some simple arithmetic design parameters unfolded First 200 watts divided 50 watts/pound yields fourlb airplane desired 16 oz/sq ft wing loading requires four-sq-ft wing about 576 sq chose 10 x 60-in wing planform airfoil chose Davis 5because never tried wanted besides Pappy deBolt recommended ar 154 Model Aviation O HELICOP ENVA 6K ENYA Some enguim please order soon Ii RADIOS Airtronlcu & Kraft AIRTRONICS 6 channel hell standard JR Century seven 4501 servos mmli 5petb 8M Ringt ci wic H psdel offer Builders fWges gettIng try Isper Elm kt polyester resin tills building season offerlna Quart site *Vhardener $7N *9K retallj guarantee fast setting easy sending tack free drying Al. Auiuhf sU wGUim *k4 0mw Pmtu*l Pubm lmme mi Amusib 59 Nj Suer Ieiu 55. Iqh Ommer -i U Look fO U5 Ifi Send SASL favedle FREE CATALOG tar fast satvlUe CIII 101*47uMdSl00Aljipbg KINCRAFT MPG 14822 Tulmdge ct Auilmd KY 41101 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLYI ATTENTION SCALERS tides remainder model design straightforward nominal very close having Falcon 56 moments etc Rule Thumb Three advises Electric system components should make up about 40% 60% total model weight means about 38 oz total budget available power system three motors mind plane Astro Super Ferrite 25 Astro Cobalt 25 Keller 25/12 weigh 14 125 95 oz respec tively left about 25 oz nominal available battery 12 cells fits just fine prop motors appropriately achieve desired operating power level easily done turns out 10 x 6 firstand 9 x 6 last two does job comes static bench data taken Rule Thumb power input cruise about 4 lb x 16 oz/sq ft 64 watts Twice gets plane flying nicely needed about 130 watts average power input nominal fiveminute flight conservative charge battery about 65 Ampereminutes MA December 1983 could draw current average rate 65/5 13 Amps requires applied motor voltage 130/13 10 volts average 12-cell battery has nominal terminal voltage 13 14 volts Jomar speed control has something name ly reduce voltage average desired flight power time ground-handling takeoffs touch goes loops etc full throttle easily brings up power past 200 watts based previously-mentioned bench data course actual performance bit better conservative predictions because prop unloads air manifests itself longer flight time Average flight time date over 6A minutes flights included lots touch goes loops land taxi takeoffson grass field Now would say Rules Thumb work complete story some facts figures about Eureka completed wing weighs 85 oz Go back check Rule Thumb Four com plete airplane radio no power system parts weighs 275 oz 48 oz landing gear wheels way covering MonoKote radio flight pack 250 mAh prop weighs about ounce Remember quar ter-ouncesRule Thumb Five So guess what now Im bored real goal ground-handling machine worked out just great now Im planning new plane maybe just new wing flaps ailerons challenge after anotherthats what keeps Electric juice flowing hope larger Electric design ex ample proves helpful intent colunm basically seemed very appropriate See Elec trics dont have hand-launched Happy Landings Bob Kopski 25 West End Dr Lansdale PA 19446 RC Giant ScalelBeckman Continued page 65 smaller models prime example Olean Sam Freys Enya 12-powered Laser 200 84-in-span model weighed 14 lb its performance amazing think Sam must have learned fly gymnasium would take off fly five ten minutes doing standard maneu vers some not-so-standard ones during whole flight dont think model ever 200 feet him direction time engine purring quietly could hardly hear back pits interesting model years rally Carl Dannenbowers DC-3 Yes Mortimer model picture sound two Quadras almost sync intoxicating its easy see few two- three- fourengine models around attract much tention Carl spent year-and-a-half creation working drawings Nick Ziroli Nick will have complete plans available later year Span 12 feet model weighs 50 lbs Power two Q35 Quadras swinging homemade FWfV1COMPLETE THIS FORM lLlEhEEEIEIEIP-AND ATTACH MAtLING IIlEXB1EIEhLEELABEL FROM RECENT required changeweeks ISSUE LET US KNOW WHERE YOU ARE GOING address Attach current MA mailing appropriate box mall SubscrtP Avtation 1810 Samuel Morse Dr NEW sumscRlPTlON 0 CHANGE OF ADDRESS Non-AMA subscription rates $1800 12 months US possessIons elsewhere includIng Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE 71 P MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 October1984 155 EPOXY GLASS COWLS FOR NOSEPI PICA SID AIORGAM BALSA USA PLAIT CONCEPT FLEET HOSTETLER RCM T-CPAFT SHEBER P1173 & SCALE S UPER CUB POKKERO-7 BOEING P-72 P-26 P4B2 P4B4 SPARROW HAWK GEE BEE MOO Y AOACBRIENS WRBULENT CNRISIFN EAGLE BRISIGNELLAS STARDUSTER II A SCALE J3-BI BABY FLYBABY AIRCAMPER PILOT JUNGRIARN 73B SCALE 7/4 SCALE DECA IJIAL 014 PIPER PA-SB & OTHERS WHEEL PANTS FOR CITABRIA STAROUS TER II PITTS SKYBOLT LJBERTYSPORT CHRIS TEN EAGLE PBS HAWKS STEARM4PS SlJNSON SR-B MULLIGAN & OTHERS DRAZED& NEAT-ThEATEDWIREGEARSbCADANES LARGE SCALE PlANS AVAILABLE Send $100 latest list supply Modelers libergiawa parts plansWrite call ua T BERGLASS SPECIALTIES 30925 BLOCK GARDEN CItY MI 48135 PHONE 313 4214358 1131 NW 45 Street Ft tauderdute FL 33309 13051 491-6115 ENGINEERING THE LANDING GEAR PEOPLE Tired kit indict gears dent tit higglC property II & B Engineenog ceo sotne probtems * Custom haitI needs & specs guarauteed lit * Strong & durohte withstand taugtasst boding * II & 0 Eogneeriog gear will work & keep year higgie Itying * to stuck reptacement gear tsr poputar models gyren PIlls Chrtsteo Eagle CAP 21 Satss lISA J-3 CIII Air Tech Pownee Eagle Nasco Big Stick Champ Cilahila & H madets Soapper Stinger Suapper Tun y5RffE Easy use part no mis paint system Ho mixing Ho waiting Fast drying extremely fuel proof Formulated iust modeler covers surfaces paints resins Send free instruction brochure BUY IT YOULL LIKE IT SIG MFG COMontezuma IA 50171 Fooled DC-3 Bob showed earlier really modela beauty Carl Dannen bower Its really flown yetonly lIfted off during high-speed taxi run