Radio Control Electrics Bob Kopski FREQUENT QUESTION am often asked about Leisure Playboy seems builders sure cabin version CG center gravity should fall can tell ismy Playboy flies just great 1 nd main spar about 4/4 leading edge wing comes out about 45% chord seems unusual its because isby present-day design OldTimerand has lifting stabthe tail carries bigger part weight hence relatively aft CG location Mine stable forgiving Ive handed box young totally inexperienced boy ballwith no great worries part something nice boy neighborhoodthe hobby needs youth topic Old-Timers SAM 76 held OT meet past July neighborhoodjust few minutes drive home grounds daughters elementary school Im ac tive OT am interested besides know some great guys heavily involved went over take look around Contest Director Ralph Riddle persuad ed bring out some Electrics dem onstrate Naturally went back home got Playboyand Spectra recently outfitted latter cobalt 15 described below Play boy highly appropriate Spectra should dazzle least few eyes thought OT guys very casualalways seeming have lots fun tried blend alternately flew two planes several times As normal group some folks interested some busy own contest terestsvery understandable what experience showed Playboy fell between could easily outclimb some marginally-powered ignition models absolutely no match contemporary engines Also sky up everything flew well sky down everything came down As far could see Electric could handily fit among Old-Timers cobalt-powered Spectra rather Closeup nine-cell 08 ah pack assembly fits exactly original sixpack did balsa spacers glued cell sleeves clear siliconeBob no longer recoin mends though spac ing permitted continued effectiveness original cooling-air holes planes fuselage floor Note bus bars interconnect ing cells 52 Model Aviation Bob used motors batteries experiment described column L R two interchangeable 05-size ferrite motors six-pack 12 Ah Ni-Cd cells cobalt 15-size motor nine-cell 08 Ah battery pack airborne weight 05 15 systems identical two battery packs identical watt-minutes capability two microawitches used experiment little satisfactory 05size system its Radio Shack 15-size power system such high current drain robust switch mandatory shown can ob ta med either Astro Leisure Although switch lots larger ap preciably heavier Bob aiso used 25-amp fuse systemotherwise switch might have fuse aggressive Old-Timer simply didnt fit day some conversation fol lowed flying learned Electric OT progressing popular combination What shame seems some Electric rules bickering referred last column has adverse affects OT Electricto ex tent some OT leaders present affair want nothing Yup shame natural combination has stifled seems Perhaps might offer suggestion SAM Its just same thing said last issue try out Electric OT cat egory allows anything Electric par ticipateproviding course model appropriate OT Try timed event ROG precision landing seem appropriate Dont bother yourself size weight rules now Allow use battery/motor modelers wish use Permit pilot fly out battery wishes Establish what initially would seem like appropriate flight time maxes allow flexibility local conditions After everyone knows Electric doesnt fly long right Hah guess point get fresh very simple start allow ance Electric power system used key Flight times average determined battery size~ TABLE ONE SPECTRA SOAR FLIGHT TIM E HIGH-POWER FLIGHT SYSTEM FlightTime Nominsec 11439 21346 31359 41527 51657 61327 71313 81326 91446 101403 111515 121601 13918 141500 151101 161143 17932 181035 FlightTime Nomlnsec 191206 201343 211345 22148 231604 241519 251548 261601 2714333 281321 291507 301032 312212 32936 331624 341208 Average 1354 battery weight essentially -same thing relative weights Elec tric power system total airplane pretty much same plane cases power system motor battery will make up about half total model weight bigger system necessarily better Run year two gradually ad just rules experience indicates Get ting restart important thing everything else provided can accept fact nothing perfectly satisfac Continued page 148 January1985 53A Tricky cobalt 15 used experiment actuaiiy smaller diameter 05 motor repiaced shimmed fit motor-mount tube adding four spacer strips 1/4-iri-wide A-in-thick strips double-sticky servo-mounting tape covering -ln-wide strips cut Ace RC giider-skid cicar plastic Curved front edges shims permit motor inserted its mount within piane THE SHAPE OF THINGS TO COME NEW computer-designed 14 x 6 Taipan Ultra highstrength fiberglass re inforced nylon Outstanding perform ance 60-90 2-stroke 4-stroke enginesl List $795/INTRO Price $695 5-Pack 0 TAIPAN True Pitch Value SizeRetailCondor 70-Pack 7 x 4075049450 7 x 6 075 049 450 8x4085055510 8x 6070046420 8x6085055510 9 x 4105069630 9 x 6105069630 10x4125080750 10x6125080750 11x5150097900 11 x 7150097900 Top trade discounts dealer/dist x 6 unreinforced beginner C/L CONDOR HOBBIES 17971 Sky Park Circle Unit D Irvine CA 92714 Telephone 714 2501425 Handling Charges COD & Credit Cards -$475 CSuUiSUPrepaid Order -$250 Robson House Hobby Supplies 222 Clareview Road 0-3 Edmonton Alta Can T5A 3Y5 MC VISA No _________________________ ExpeaFoe Date _________________________________ Signature Name Street Cay State Please alow 3 weeks estra o cueces Invited join National Soaring Society OFFICIAL SOARING SPECIAL INTEREST GROUP YEARLY NATIONAL TOURNAMENTS NATION-WIDE EXCELLENCE AWARDS PROGRAM EXCELLENT BI-MONTHLY NEWSLETTER NSS CONTRIBUTES SUBSTANTIAL AMOUNTS TO EACH F3B SOARING TEAM NSS IS RESPONSIBLE FOR THE ORGANIZATION AND OVERSEEING OF AMA NATS INCLUDING AWARDS BANGUET YEARLY DUES ARE 51200 SPECIAL FAMILY RATES NSS OFFICERS ARE FROM ALL 11 DISTRICTS pL % 9 4z S 0 Informaton Contact JOHN R VOGEL 906 ORCHARD PARK DR GIBSONIA PA 15044 148 Model Aviation depending what reference source used blue used fuselages Stear mans other similar trainers also referred different names sometimes called ANA 501 Light Blue some times True Blue federal standard number ES 15102 paint glossy British Canadian trainers painted yellow also RAE RCAF color being called simply Yellow sample Hobbypoxy reference material matte contem porary aircraft can glossy well formulas ANA 614 Orange Yellow 20 parts H49 Cub Yellow four parts H47 Bright Yellow part H66 Dark Red part H1O White ANA 501 Light Bluefour parts H25 Sky Blue three parts H24 Dark Blue part H65 Bright Red part H67 Maroon RAF/RCAF Yellownine parts H49 Cub Yellow seven parts H47 Bright Yellow three parts H55 Cream two parts H66 Dark Red Eor matte finish mix 11 Hobby poxy HOS Elat Hardener Eor gloss fin ish use either H02 H06 Gloss Quick Spray Hardeners Hobbypoxy has revised updated its Hobbypoxy Painting Pointers Brochure 1985 four-page booklet describes products extensive line finishing materials gives complete structions use Expert methods priming finishing bare balsa fiberglass epoxy glass molded plastics discussed Information giv en painting trimming various types iron-on covering materials greatest interest modelers will highly-detailed very thorough sec tion spray painting techniques includ ing selection proper airbrush compressor equipment brochure available mail no cost Request copy Hobbypoxy Products Pettit Paint Co Inc 36 Pine St Box 378 Rockaway NJ 07866-0378 Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC ElectrlcslKopski Continued page 53 tory everyone Electric OT anyway Same reas ons some folks fly Peanut scale some CL Carrier some RC Helicopterits fun theres something else too getting more fun damental concern kind gaspowered flying Remember school yard mentioned above Such event schoolyard exception Erom what can determine schoolyards closed model flying bet lot would change clean quiet Elec tric power Get point Before getting main event month want recall attention lead photo column Sep tember issue mystery plane pictured open structure brought three writ ten responsesall correct naming model Lockheed Constellation No guessed builder Heinz Koerner Heinz gentleman runs Clin ic annual KRC Electric Ely Connie second first completed technical reasons larger mishap few weeks prior years Electric Ely repaired time event Look next year As promised last column month will describe results date severalmonth experiment involving power system makeup Electrics may recall visitor field sum mer Tom southern California told high rate-of-climb preference Electric gliders out turf compared slower though longer power ascent out way decided try way same time put further test long-held tenet its battery other things being equal determines average total flight time such plane chose now-frequent example Spectra Soar design boring because have lots historic data Some data graphed Part Seven MAs Electric Series March 1984 flight histogram presented showed very clearly average flight time about 13-14 minutes hundreds flights six-cell 12 Ah battery various 05-sized motors data flying generally evening weekend morning air no obvious lift present decided install Cobalt 15 suit able battery trying maintain same weight balance etc Erom bench data knew Cobalt 15 7 x 6 nylon nine cells should have static put power level about 140 wattsmuch before vastly needed just cruise plane worked out very well Both OS motor six-l 2 Ah-cell system Cobalt 15 nine-O8 Ah-cell system weigh about 18A oz although new battery about oz lighter felt certainly close enough make valid test argu ment total flight time should about same both power systems same time give taste significantly faster rate climb shorter total motor-run time Indeed power combination proved definitely much faster-climbing replaced useful power run time just definitely much shorter expected nine 08 Ah Sanyo cells assembled pack would fit exactly six pack 12 Ah cells beenincluding interfacing exist ing cooling-air exit holes cells spaced balsa sticks accomplish assembly held together clear silicone adhesive later proved inadequate adhesive Full Line NEW t 1445 p 115 364 Catalog Now Available glance through new catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsPO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation now would recommend purpose original Radio Shack microswitch replaced much heftier available Astro p/n 4032 Leisure p/n 6006 25 amp fuse installed consistent previous data new battery also charged nor mal safe conservative fashion Specif ically charged pack empty somewhat less its label capacity done constant charge cur rent 30 amps 15 minutes Now results date Ive logged 35 flights shown Table fly ing done 21 different days either mornings evenings some flights different pilots though data limited its very clear nominal flight time Spectra Soar neutral air less same before fact energy stored battery apparently deter mining total average flight time dependent appropriate power sys tem same plane same total weight also means about same average total flight time results whether plane skyrockets about two one-minute very-high-power runs climbs lazily On-Off fashion total four-five minutes Some additional comments order new installation doesnt take plane straight up out sight minute does haul Spectra fast such performance may liking would otherwise just cruise around now necessary stay stick during climb Also installation significantly costly nearly three times power sys tem replaced Furthermore charging nine cells would impasse fliers know Regarding obviously Ive way charge other odd packs well enough terest perhaps construction article would possible other hand can see several dis tinct advantages such climb defi nitely affords quite thrill would thereby appealing blow-a-hole in-the-day crowd course extra power margin can make marginal-weather flying much enjoyablefor times seems like plane may never cut through wind turbulence strong sink Also Ive seen some occa sions looking good thermals since theyre always present south eastern PA found such could high up ie possible get good lift lower altitudes high climb-rate necessary find expediently Further fast-up ap proach may liking Sail plane pilots used winch Finally models equipped speed control high-power-spending capability can called upon needed Otherwise such models can flown reduced power levels thus extending total power-on time necessarily total flight time latter application can quite lot fun So have itfor planes available energy used maximize total flight time gliders OTs bat tery capacity ie watt-minutes deter mines total flight time independent rate power expended part other model pa rameters being equal Roland Boucher Leisure has conducted similar tests has arrived same conclusion Bob Boucher Astro Flight puts same result different terms says final altitude reached whether means slow ascent rapid climb same same battery Are questions last column November 1984 argued establishing initial Electric model categories unburdened complexities power system rules regulations reduces permitting yea verilyencouraging power systems used AMA com petitions offered approach way get organized Electric competition off running Id like expand upon such categoryScaleas detail example Consider Scale enthusiast builds FF CL RC Scale builds January1985 149 MAGIC MAGNET BUILDER W Eldon J Lind Co 2912 Walker Lee Los Alamlto% CA 90720 Precision Scale Giant Scale Stand-Off Scale Sport Scale builds Peanut Scale static scale goodness-knowswhat-else scale Now enter Electric Scale Note above operative word scale Size powerplants variables above longestablished -polished categories mind consider size RC Electric Scale classfor starters Some apartment dwellers may elect some thing 30-in span Others interest facility can elect Y4-scale size range will look bizarre deed its because weve become used size categories over years see no basic reason any-size-goes Electric category cannot set upini tially long learned judging Scale Im sure suitable rules can developed assure judging equivalency independent model size Similarly flight requirements can suitably scaled important thing get Electric Scale Electric-every thing-else going Give modeler full freedom power-system choicejust get Electric introduced Theres plenty time complicate categorize classi fy Electrics future meantime just think 34-in 54-in whatever-inch quiet Scale Electrics flying schoolyard down block should perfectly clear proposal can made work model type just Scale Think about Without first continuing breath no life Happy Landings Bob Kopski 2S West End Dr Lansdale PA 19446 quite few people Phenomenal seminar informal conversa tional part clinic activity past have hosted hour two activi ty Heinz once Roland Boucher opportunity field questions general interest year generally light interest clinic busy excitement flight line dropped seminar Saturday Following Up Last Down Sunday Heinz Bob Boucher Frank Heinrich Jeff Surgnier latter two representing Robbe hosted 'round table' stand round Heinz work table seminar discussions something everyone Earlier mentioned another Electric Fly institutionthe informal Saturday Social Weve getting attendance afar several years visitors normally staying local motel over weekend Three years ago KRC offered some diversion guests social Like rest Electric Fly also low-key gathering takes place clubs regular meeting place Hatfield American Legion Hall KRC ladies bring varied goodies snack liquid refreshments available Legion Guests can relax enjoy change pace flight line Wives kids join too have several door prize drawings visitors including things ladies year fortunate have -Bob Boucher attendance social twisted arm telling us few words about experiences man-powered solar-powered flight successes played key role Bob very entertaining bouncing between light hearted stories some tech nical nature social wrapped up just before midnight thered enough time charge up Sundays flying KRC tries make event easy fun everyone part providing flight-line batteries visitors wouldnt have continually return cars recharging past years several batteries hard time keeping up load anticipated larger requirement year help area obtained loan five highpower line-operated laboratory supplies mate up five auto batteries flight light way fliers could drain amps out batteries charge planes supplies would put amps back next person would have battery same good condition As turned out very heavy attend ance intensive flying supplies real salvation recharging story doesnt end Frank Heinrich Jeff Surgnier Robbe attendance weekend Along other Robbe products brought several automatic chargers offering charging services everyone personally know prod ucts have always easy find Frank tells distribution Robbe charger rapidly improving Any way lots people can say saw charged up 1984 Electric Fly normal affair nature people leave vivid memo ries particular aspects pleasing cant help feel years Electric Fly must have afforded such memories visitors cluded among must surely sheer delight watching Keith Shaw Ann Arbor MI fly brought four planes three new Zomby Old-Timer past visit Keith very likable fellow excel lent craftsman truly outstanding pilot effect Keith one-man Elec tric Fly year flew flying wing Banshee precision aerobatic Colum bia amazing retract-equipped Spitfire Keith went up others came down watch held crowd CyA flight ended ovation brute power persua sion Bob Boucher provided something remember Astro Challenger glider new Astro kit would burst upward leav ing no doubt highest rate climb would hard imagine casual spectator finding something special interest liking three attendees very first Electric Fly have variously attended meets since same time year time reunion Ar150 Model Aviation An ideal way build balsa construc ted model airplane wings fuselage stabilizers elevators rudders Build fast easy straight true Makes other methods obsolete CONTENTS 1 -16 x48 STEEL PLATE 30- MAGNETS 60- MAGNETIC POLES 10-5 UPRIGHTS 10- 1 x 10/32 BOLTS 10- 10/32 NUTS useful tool will last lifetime nothing wear out Magnetically holds balsa parts place gluing No damaged split weakened wood using pins Electric FlyIKopski Continued page 88
Edition: Model Aviation - 1985/01
Page Numbers: 52, 53, 148, 149, 150
Radio Control Electrics Bob Kopski FREQUENT QUESTION am often asked about Leisure Playboy seems builders sure cabin version CG center gravity should fall can tell ismy Playboy flies just great 1 nd main spar about 4/4 leading edge wing comes out about 45% chord seems unusual its because isby present-day design OldTimerand has lifting stabthe tail carries bigger part weight hence relatively aft CG location Mine stable forgiving Ive handed box young totally inexperienced boy ballwith no great worries part something nice boy neighborhoodthe hobby needs youth topic Old-Timers SAM 76 held OT meet past July neighborhoodjust few minutes drive home grounds daughters elementary school Im ac tive OT am interested besides know some great guys heavily involved went over take look around Contest Director Ralph Riddle persuad ed bring out some Electrics dem onstrate Naturally went back home got Playboyand Spectra recently outfitted latter cobalt 15 described below Play boy highly appropriate Spectra should dazzle least few eyes thought OT guys very casualalways seeming have lots fun tried blend alternately flew two planes several times As normal group some folks interested some busy own contest terestsvery understandable what experience showed Playboy fell between could easily outclimb some marginally-powered ignition models absolutely no match contemporary engines Also sky up everything flew well sky down everything came down As far could see Electric could handily fit among Old-Timers cobalt-powered Spectra rather Closeup nine-cell 08 ah pack assembly fits exactly original sixpack did balsa spacers glued cell sleeves clear siliconeBob no longer recoin mends though spac ing permitted continued effectiveness original cooling-air holes planes fuselage floor Note bus bars interconnect ing cells 52 Model Aviation Bob used motors batteries experiment described column L R two interchangeable 05-size ferrite motors six-pack 12 Ah Ni-Cd cells cobalt 15-size motor nine-cell 08 Ah battery pack airborne weight 05 15 systems identical two battery packs identical watt-minutes capability two microawitches used experiment little satisfactory 05size system its Radio Shack 15-size power system such high current drain robust switch mandatory shown can ob ta med either Astro Leisure Although switch lots larger ap preciably heavier Bob aiso used 25-amp fuse systemotherwise switch might have fuse aggressive Old-Timer simply didnt fit day some conversation fol lowed flying learned Electric OT progressing popular combination What shame seems some Electric rules bickering referred last column has adverse affects OT Electricto ex tent some OT leaders present affair want nothing Yup shame natural combination has stifled seems Perhaps might offer suggestion SAM Its just same thing said last issue try out Electric OT cat egory allows anything Electric par ticipateproviding course model appropriate OT Try timed event ROG precision landing seem appropriate Dont bother yourself size weight rules now Allow use battery/motor modelers wish use Permit pilot fly out battery wishes Establish what initially would seem like appropriate flight time maxes allow flexibility local conditions After everyone knows Electric doesnt fly long right Hah guess point get fresh very simple start allow ance Electric power system used key Flight times average determined battery size~ TABLE ONE SPECTRA SOAR FLIGHT TIM E HIGH-POWER FLIGHT SYSTEM FlightTime Nominsec 11439 21346 31359 41527 51657 61327 71313 81326 91446 101403 111515 121601 13918 141500 151101 161143 17932 181035 FlightTime Nomlnsec 191206 201343 211345 22148 231604 241519 251548 261601 2714333 281321 291507 301032 312212 32936 331624 341208 Average 1354 battery weight essentially -same thing relative weights Elec tric power system total airplane pretty much same plane cases power system motor battery will make up about half total model weight bigger system necessarily better Run year two gradually ad just rules experience indicates Get ting restart important thing everything else provided can accept fact nothing perfectly satisfac Continued page 148 January1985 53A Tricky cobalt 15 used experiment actuaiiy smaller diameter 05 motor repiaced shimmed fit motor-mount tube adding four spacer strips 1/4-iri-wide A-in-thick strips double-sticky servo-mounting tape covering -ln-wide strips cut Ace RC giider-skid cicar plastic Curved front edges shims permit motor inserted its mount within piane THE SHAPE OF THINGS TO COME NEW computer-designed 14 x 6 Taipan Ultra highstrength fiberglass re inforced nylon Outstanding perform ance 60-90 2-stroke 4-stroke enginesl List $795/INTRO Price $695 5-Pack 0 TAIPAN True Pitch Value SizeRetailCondor 70-Pack 7 x 4075049450 7 x 6 075 049 450 8x4085055510 8x 6070046420 8x6085055510 9 x 4105069630 9 x 6105069630 10x4125080750 10x6125080750 11x5150097900 11 x 7150097900 Top trade discounts dealer/dist x 6 unreinforced beginner C/L CONDOR HOBBIES 17971 Sky Park Circle Unit D Irvine CA 92714 Telephone 714 2501425 Handling Charges COD & Credit Cards -$475 CSuUiSUPrepaid Order -$250 Robson House Hobby Supplies 222 Clareview Road 0-3 Edmonton Alta Can T5A 3Y5 MC VISA No _________________________ ExpeaFoe Date _________________________________ Signature Name Street Cay State Please alow 3 weeks estra o cueces Invited join National Soaring Society OFFICIAL SOARING SPECIAL INTEREST GROUP YEARLY NATIONAL TOURNAMENTS NATION-WIDE EXCELLENCE AWARDS PROGRAM EXCELLENT BI-MONTHLY NEWSLETTER NSS CONTRIBUTES SUBSTANTIAL AMOUNTS TO EACH F3B SOARING TEAM NSS IS RESPONSIBLE FOR THE ORGANIZATION AND OVERSEEING OF AMA NATS INCLUDING AWARDS BANGUET YEARLY DUES ARE 51200 SPECIAL FAMILY RATES NSS OFFICERS ARE FROM ALL 11 DISTRICTS pL % 9 4z S 0 Informaton Contact JOHN R VOGEL 906 ORCHARD PARK DR GIBSONIA PA 15044 148 Model Aviation depending what reference source used blue used fuselages Stear mans other similar trainers also referred different names sometimes called ANA 501 Light Blue some times True Blue federal standard number ES 15102 paint glossy British Canadian trainers painted yellow also RAE RCAF color being called simply Yellow sample Hobbypoxy reference material matte contem porary aircraft can glossy well formulas ANA 614 Orange Yellow 20 parts H49 Cub Yellow four parts H47 Bright Yellow part H66 Dark Red part H1O White ANA 501 Light Bluefour parts H25 Sky Blue three parts H24 Dark Blue part H65 Bright Red part H67 Maroon RAF/RCAF Yellownine parts H49 Cub Yellow seven parts H47 Bright Yellow three parts H55 Cream two parts H66 Dark Red Eor matte finish mix 11 Hobby poxy HOS Elat Hardener Eor gloss fin ish use either H02 H06 Gloss Quick Spray Hardeners Hobbypoxy has revised updated its Hobbypoxy Painting Pointers Brochure 1985 four-page booklet describes products extensive line finishing materials gives complete structions use Expert methods priming finishing bare balsa fiberglass epoxy glass molded plastics discussed Information giv en painting trimming various types iron-on covering materials greatest interest modelers will highly-detailed very thorough sec tion spray painting techniques includ ing selection proper airbrush compressor equipment brochure available mail no cost Request copy Hobbypoxy Products Pettit Paint Co Inc 36 Pine St Box 378 Rockaway NJ 07866-0378 Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC ElectrlcslKopski Continued page 53 tory everyone Electric OT anyway Same reas ons some folks fly Peanut scale some CL Carrier some RC Helicopterits fun theres something else too getting more fun damental concern kind gaspowered flying Remember school yard mentioned above Such event schoolyard exception Erom what can determine schoolyards closed model flying bet lot would change clean quiet Elec tric power Get point Before getting main event month want recall attention lead photo column Sep tember issue mystery plane pictured open structure brought three writ ten responsesall correct naming model Lockheed Constellation No guessed builder Heinz Koerner Heinz gentleman runs Clin ic annual KRC Electric Ely Connie second first completed technical reasons larger mishap few weeks prior years Electric Ely repaired time event Look next year As promised last column month will describe results date severalmonth experiment involving power system makeup Electrics may recall visitor field sum mer Tom southern California told high rate-of-climb preference Electric gliders out turf compared slower though longer power ascent out way decided try way same time put further test long-held tenet its battery other things being equal determines average total flight time such plane chose now-frequent example Spectra Soar design boring because have lots historic data Some data graphed Part Seven MAs Electric Series March 1984 flight histogram presented showed very clearly average flight time about 13-14 minutes hundreds flights six-cell 12 Ah battery various 05-sized motors data flying generally evening weekend morning air no obvious lift present decided install Cobalt 15 suit able battery trying maintain same weight balance etc Erom bench data knew Cobalt 15 7 x 6 nylon nine cells should have static put power level about 140 wattsmuch before vastly needed just cruise plane worked out very well Both OS motor six-l 2 Ah-cell system Cobalt 15 nine-O8 Ah-cell system weigh about 18A oz although new battery about oz lighter felt certainly close enough make valid test argu ment total flight time should about same both power systems same time give taste significantly faster rate climb shorter total motor-run time Indeed power combination proved definitely much faster-climbing replaced useful power run time just definitely much shorter expected nine 08 Ah Sanyo cells assembled pack would fit exactly six pack 12 Ah cells beenincluding interfacing exist ing cooling-air exit holes cells spaced balsa sticks accomplish assembly held together clear silicone adhesive later proved inadequate adhesive Full Line NEW t 1445 p 115 364 Catalog Now Available glance through new catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsPO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation now would recommend purpose original Radio Shack microswitch replaced much heftier available Astro p/n 4032 Leisure p/n 6006 25 amp fuse installed consistent previous data new battery also charged nor mal safe conservative fashion Specif ically charged pack empty somewhat less its label capacity done constant charge cur rent 30 amps 15 minutes Now results date Ive logged 35 flights shown Table fly ing done 21 different days either mornings evenings some flights different pilots though data limited its very clear nominal flight time Spectra Soar neutral air less same before fact energy stored battery apparently deter mining total average flight time dependent appropriate power sys tem same plane same total weight also means about same average total flight time results whether plane skyrockets about two one-minute very-high-power runs climbs lazily On-Off fashion total four-five minutes Some additional comments order new installation doesnt take plane straight up out sight minute does haul Spectra fast such performance may liking would otherwise just cruise around now necessary stay stick during climb Also installation significantly costly nearly three times power sys tem replaced Furthermore charging nine cells would impasse fliers know Regarding obviously Ive way charge other odd packs well enough terest perhaps construction article would possible other hand can see several dis tinct advantages such climb defi nitely affords quite thrill would thereby appealing blow-a-hole in-the-day crowd course extra power margin can make marginal-weather flying much enjoyablefor times seems like plane may never cut through wind turbulence strong sink Also Ive seen some occa sions looking good thermals since theyre always present south eastern PA found such could high up ie possible get good lift lower altitudes high climb-rate necessary find expediently Further fast-up ap proach may liking Sail plane pilots used winch Finally models equipped speed control high-power-spending capability can called upon needed Otherwise such models can flown reduced power levels thus extending total power-on time necessarily total flight time latter application can quite lot fun So have itfor planes available energy used maximize total flight time gliders OTs bat tery capacity ie watt-minutes deter mines total flight time independent rate power expended part other model pa rameters being equal Roland Boucher Leisure has conducted similar tests has arrived same conclusion Bob Boucher Astro Flight puts same result different terms says final altitude reached whether means slow ascent rapid climb same same battery Are questions last column November 1984 argued establishing initial Electric model categories unburdened complexities power system rules regulations reduces permitting yea verilyencouraging power systems used AMA com petitions offered approach way get organized Electric competition off running Id like expand upon such categoryScaleas detail example Consider Scale enthusiast builds FF CL RC Scale builds January1985 149 MAGIC MAGNET BUILDER W Eldon J Lind Co 2912 Walker Lee Los Alamlto% CA 90720 Precision Scale Giant Scale Stand-Off Scale Sport Scale builds Peanut Scale static scale goodness-knowswhat-else scale Now enter Electric Scale Note above operative word scale Size powerplants variables above longestablished -polished categories mind consider size RC Electric Scale classfor starters Some apartment dwellers may elect some thing 30-in span Others interest facility can elect Y4-scale size range will look bizarre deed its because weve become used size categories over years see no basic reason any-size-goes Electric category cannot set upini tially long learned judging Scale Im sure suitable rules can developed assure judging equivalency independent model size Similarly flight requirements can suitably scaled important thing get Electric Scale Electric-every thing-else going Give modeler full freedom power-system choicejust get Electric introduced Theres plenty time complicate categorize classi fy Electrics future meantime just think 34-in 54-in whatever-inch quiet Scale Electrics flying schoolyard down block should perfectly clear proposal can made work model type just Scale Think about Without first continuing breath no life Happy Landings Bob Kopski 2S West End Dr Lansdale PA 19446 quite few people Phenomenal seminar informal conversa tional part clinic activity past have hosted hour two activi ty Heinz once Roland Boucher opportunity field questions general interest year generally light interest clinic busy excitement flight line dropped seminar Saturday Following Up Last Down Sunday Heinz Bob Boucher Frank Heinrich Jeff Surgnier latter two representing Robbe hosted 'round table' stand round Heinz work table seminar discussions something everyone Earlier mentioned another Electric Fly institutionthe informal Saturday Social Weve getting attendance afar several years visitors normally staying local motel over weekend Three years ago KRC offered some diversion guests social Like rest Electric Fly also low-key gathering takes place clubs regular meeting place Hatfield American Legion Hall KRC ladies bring varied goodies snack liquid refreshments available Legion Guests can relax enjoy change pace flight line Wives kids join too have several door prize drawings visitors including things ladies year fortunate have -Bob Boucher attendance social twisted arm telling us few words about experiences man-powered solar-powered flight successes played key role Bob very entertaining bouncing between light hearted stories some tech nical nature social wrapped up just before midnight thered enough time charge up Sundays flying KRC tries make event easy fun everyone part providing flight-line batteries visitors wouldnt have continually return cars recharging past years several batteries hard time keeping up load anticipated larger requirement year help area obtained loan five highpower line-operated laboratory supplies mate up five auto batteries flight light way fliers could drain amps out batteries charge planes supplies would put amps back next person would have battery same good condition As turned out very heavy attend ance intensive flying supplies real salvation recharging story doesnt end Frank Heinrich Jeff Surgnier Robbe attendance weekend Along other Robbe products brought several automatic chargers offering charging services everyone personally know prod ucts have always easy find Frank tells distribution Robbe charger rapidly improving Any way lots people can say saw charged up 1984 Electric Fly normal affair nature people leave vivid memo ries particular aspects pleasing cant help feel years Electric Fly must have afforded such memories visitors cluded among must surely sheer delight watching Keith Shaw Ann Arbor MI fly brought four planes three new Zomby Old-Timer past visit Keith very likable fellow excel lent craftsman truly outstanding pilot effect Keith one-man Elec tric Fly year flew flying wing Banshee precision aerobatic Colum bia amazing retract-equipped Spitfire Keith went up others came down watch held crowd CyA flight ended ovation brute power persua sion Bob Boucher provided something remember Astro Challenger glider new Astro kit would burst upward leav ing no doubt highest rate climb would hard imagine casual spectator finding something special interest liking three attendees very first Electric Fly have variously attended meets since same time year time reunion Ar150 Model Aviation An ideal way build balsa construc ted model airplane wings fuselage stabilizers elevators rudders Build fast easy straight true Makes other methods obsolete CONTENTS 1 -16 x48 STEEL PLATE 30- MAGNETS 60- MAGNETIC POLES 10-5 UPRIGHTS 10- 1 x 10/32 BOLTS 10- 10/32 NUTS useful tool will last lifetime nothing wear out Magnetically holds balsa parts place gluing No damaged split weakened wood using pins Electric FlyIKopski Continued page 88
Edition: Model Aviation - 1985/01
Page Numbers: 52, 53, 148, 149, 150
Radio Control Electrics Bob Kopski FREQUENT QUESTION am often asked about Leisure Playboy seems builders sure cabin version CG center gravity should fall can tell ismy Playboy flies just great 1 nd main spar about 4/4 leading edge wing comes out about 45% chord seems unusual its because isby present-day design OldTimerand has lifting stabthe tail carries bigger part weight hence relatively aft CG location Mine stable forgiving Ive handed box young totally inexperienced boy ballwith no great worries part something nice boy neighborhoodthe hobby needs youth topic Old-Timers SAM 76 held OT meet past July neighborhoodjust few minutes drive home grounds daughters elementary school Im ac tive OT am interested besides know some great guys heavily involved went over take look around Contest Director Ralph Riddle persuad ed bring out some Electrics dem onstrate Naturally went back home got Playboyand Spectra recently outfitted latter cobalt 15 described below Play boy highly appropriate Spectra should dazzle least few eyes thought OT guys very casualalways seeming have lots fun tried blend alternately flew two planes several times As normal group some folks interested some busy own contest terestsvery understandable what experience showed Playboy fell between could easily outclimb some marginally-powered ignition models absolutely no match contemporary engines Also sky up everything flew well sky down everything came down As far could see Electric could handily fit among Old-Timers cobalt-powered Spectra rather Closeup nine-cell 08 ah pack assembly fits exactly original sixpack did balsa spacers glued cell sleeves clear siliconeBob no longer recoin mends though spac ing permitted continued effectiveness original cooling-air holes planes fuselage floor Note bus bars interconnect ing cells 52 Model Aviation Bob used motors batteries experiment described column L R two interchangeable 05-size ferrite motors six-pack 12 Ah Ni-Cd cells cobalt 15-size motor nine-cell 08 Ah battery pack airborne weight 05 15 systems identical two battery packs identical watt-minutes capability two microawitches used experiment little satisfactory 05size system its Radio Shack 15-size power system such high current drain robust switch mandatory shown can ob ta med either Astro Leisure Although switch lots larger ap preciably heavier Bob aiso used 25-amp fuse systemotherwise switch might have fuse aggressive Old-Timer simply didnt fit day some conversation fol lowed flying learned Electric OT progressing popular combination What shame seems some Electric rules bickering referred last column has adverse affects OT Electricto ex tent some OT leaders present affair want nothing Yup shame natural combination has stifled seems Perhaps might offer suggestion SAM Its just same thing said last issue try out Electric OT cat egory allows anything Electric par ticipateproviding course model appropriate OT Try timed event ROG precision landing seem appropriate Dont bother yourself size weight rules now Allow use battery/motor modelers wish use Permit pilot fly out battery wishes Establish what initially would seem like appropriate flight time maxes allow flexibility local conditions After everyone knows Electric doesnt fly long right Hah guess point get fresh very simple start allow ance Electric power system used key Flight times average determined battery size~ TABLE ONE SPECTRA SOAR FLIGHT TIM E HIGH-POWER FLIGHT SYSTEM FlightTime Nominsec 11439 21346 31359 41527 51657 61327 71313 81326 91446 101403 111515 121601 13918 141500 151101 161143 17932 181035 FlightTime Nomlnsec 191206 201343 211345 22148 231604 241519 251548 261601 2714333 281321 291507 301032 312212 32936 331624 341208 Average 1354 battery weight essentially -same thing relative weights Elec tric power system total airplane pretty much same plane cases power system motor battery will make up about half total model weight bigger system necessarily better Run year two gradually ad just rules experience indicates Get ting restart important thing everything else provided can accept fact nothing perfectly satisfac Continued page 148 January1985 53A Tricky cobalt 15 used experiment actuaiiy smaller diameter 05 motor repiaced shimmed fit motor-mount tube adding four spacer strips 1/4-iri-wide A-in-thick strips double-sticky servo-mounting tape covering -ln-wide strips cut Ace RC giider-skid cicar plastic Curved front edges shims permit motor inserted its mount within piane THE SHAPE OF THINGS TO COME NEW computer-designed 14 x 6 Taipan Ultra highstrength fiberglass re inforced nylon Outstanding perform ance 60-90 2-stroke 4-stroke enginesl List $795/INTRO Price $695 5-Pack 0 TAIPAN True Pitch Value SizeRetailCondor 70-Pack 7 x 4075049450 7 x 6 075 049 450 8x4085055510 8x 6070046420 8x6085055510 9 x 4105069630 9 x 6105069630 10x4125080750 10x6125080750 11x5150097900 11 x 7150097900 Top trade discounts dealer/dist x 6 unreinforced beginner C/L CONDOR HOBBIES 17971 Sky Park Circle Unit D Irvine CA 92714 Telephone 714 2501425 Handling Charges COD & Credit Cards -$475 CSuUiSUPrepaid Order -$250 Robson House Hobby Supplies 222 Clareview Road 0-3 Edmonton Alta Can T5A 3Y5 MC VISA No _________________________ ExpeaFoe Date _________________________________ Signature Name Street Cay State Please alow 3 weeks estra o cueces Invited join National Soaring Society OFFICIAL SOARING SPECIAL INTEREST GROUP YEARLY NATIONAL TOURNAMENTS NATION-WIDE EXCELLENCE AWARDS PROGRAM EXCELLENT BI-MONTHLY NEWSLETTER NSS CONTRIBUTES SUBSTANTIAL AMOUNTS TO EACH F3B SOARING TEAM NSS IS RESPONSIBLE FOR THE ORGANIZATION AND OVERSEEING OF AMA NATS INCLUDING AWARDS BANGUET YEARLY DUES ARE 51200 SPECIAL FAMILY RATES NSS OFFICERS ARE FROM ALL 11 DISTRICTS pL % 9 4z S 0 Informaton Contact JOHN R VOGEL 906 ORCHARD PARK DR GIBSONIA PA 15044 148 Model Aviation depending what reference source used blue used fuselages Stear mans other similar trainers also referred different names sometimes called ANA 501 Light Blue some times True Blue federal standard number ES 15102 paint glossy British Canadian trainers painted yellow also RAE RCAF color being called simply Yellow sample Hobbypoxy reference material matte contem porary aircraft can glossy well formulas ANA 614 Orange Yellow 20 parts H49 Cub Yellow four parts H47 Bright Yellow part H66 Dark Red part H1O White ANA 501 Light Bluefour parts H25 Sky Blue three parts H24 Dark Blue part H65 Bright Red part H67 Maroon RAF/RCAF Yellownine parts H49 Cub Yellow seven parts H47 Bright Yellow three parts H55 Cream two parts H66 Dark Red Eor matte finish mix 11 Hobby poxy HOS Elat Hardener Eor gloss fin ish use either H02 H06 Gloss Quick Spray Hardeners Hobbypoxy has revised updated its Hobbypoxy Painting Pointers Brochure 1985 four-page booklet describes products extensive line finishing materials gives complete structions use Expert methods priming finishing bare balsa fiberglass epoxy glass molded plastics discussed Information giv en painting trimming various types iron-on covering materials greatest interest modelers will highly-detailed very thorough sec tion spray painting techniques includ ing selection proper airbrush compressor equipment brochure available mail no cost Request copy Hobbypoxy Products Pettit Paint Co Inc 36 Pine St Box 378 Rockaway NJ 07866-0378 Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC ElectrlcslKopski Continued page 53 tory everyone Electric OT anyway Same reas ons some folks fly Peanut scale some CL Carrier some RC Helicopterits fun theres something else too getting more fun damental concern kind gaspowered flying Remember school yard mentioned above Such event schoolyard exception Erom what can determine schoolyards closed model flying bet lot would change clean quiet Elec tric power Get point Before getting main event month want recall attention lead photo column Sep tember issue mystery plane pictured open structure brought three writ ten responsesall correct naming model Lockheed Constellation No guessed builder Heinz Koerner Heinz gentleman runs Clin ic annual KRC Electric Ely Connie second first completed technical reasons larger mishap few weeks prior years Electric Ely repaired time event Look next year As promised last column month will describe results date severalmonth experiment involving power system makeup Electrics may recall visitor field sum mer Tom southern California told high rate-of-climb preference Electric gliders out turf compared slower though longer power ascent out way decided try way same time put further test long-held tenet its battery other things being equal determines average total flight time such plane chose now-frequent example Spectra Soar design boring because have lots historic data Some data graphed Part Seven MAs Electric Series March 1984 flight histogram presented showed very clearly average flight time about 13-14 minutes hundreds flights six-cell 12 Ah battery various 05-sized motors data flying generally evening weekend morning air no obvious lift present decided install Cobalt 15 suit able battery trying maintain same weight balance etc Erom bench data knew Cobalt 15 7 x 6 nylon nine cells should have static put power level about 140 wattsmuch before vastly needed just cruise plane worked out very well Both OS motor six-l 2 Ah-cell system Cobalt 15 nine-O8 Ah-cell system weigh about 18A oz although new battery about oz lighter felt certainly close enough make valid test argu ment total flight time should about same both power systems same time give taste significantly faster rate climb shorter total motor-run time Indeed power combination proved definitely much faster-climbing replaced useful power run time just definitely much shorter expected nine 08 Ah Sanyo cells assembled pack would fit exactly six pack 12 Ah cells beenincluding interfacing exist ing cooling-air exit holes cells spaced balsa sticks accomplish assembly held together clear silicone adhesive later proved inadequate adhesive Full Line NEW t 1445 p 115 364 Catalog Now Available glance through new catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsPO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation now would recommend purpose original Radio Shack microswitch replaced much heftier available Astro p/n 4032 Leisure p/n 6006 25 amp fuse installed consistent previous data new battery also charged nor mal safe conservative fashion Specif ically charged pack empty somewhat less its label capacity done constant charge cur rent 30 amps 15 minutes Now results date Ive logged 35 flights shown Table fly ing done 21 different days either mornings evenings some flights different pilots though data limited its very clear nominal flight time Spectra Soar neutral air less same before fact energy stored battery apparently deter mining total average flight time dependent appropriate power sys tem same plane same total weight also means about same average total flight time results whether plane skyrockets about two one-minute very-high-power runs climbs lazily On-Off fashion total four-five minutes Some additional comments order new installation doesnt take plane straight up out sight minute does haul Spectra fast such performance may liking would otherwise just cruise around now necessary stay stick during climb Also installation significantly costly nearly three times power sys tem replaced Furthermore charging nine cells would impasse fliers know Regarding obviously Ive way charge other odd packs well enough terest perhaps construction article would possible other hand can see several dis tinct advantages such climb defi nitely affords quite thrill would thereby appealing blow-a-hole in-the-day crowd course extra power margin can make marginal-weather flying much enjoyablefor times seems like plane may never cut through wind turbulence strong sink Also Ive seen some occa sions looking good thermals since theyre always present south eastern PA found such could high up ie possible get good lift lower altitudes high climb-rate necessary find expediently Further fast-up ap proach may liking Sail plane pilots used winch Finally models equipped speed control high-power-spending capability can called upon needed Otherwise such models can flown reduced power levels thus extending total power-on time necessarily total flight time latter application can quite lot fun So have itfor planes available energy used maximize total flight time gliders OTs bat tery capacity ie watt-minutes deter mines total flight time independent rate power expended part other model pa rameters being equal Roland Boucher Leisure has conducted similar tests has arrived same conclusion Bob Boucher Astro Flight puts same result different terms says final altitude reached whether means slow ascent rapid climb same same battery Are questions last column November 1984 argued establishing initial Electric model categories unburdened complexities power system rules regulations reduces permitting yea verilyencouraging power systems used AMA com petitions offered approach way get organized Electric competition off running Id like expand upon such categoryScaleas detail example Consider Scale enthusiast builds FF CL RC Scale builds January1985 149 MAGIC MAGNET BUILDER W Eldon J Lind Co 2912 Walker Lee Los Alamlto% CA 90720 Precision Scale Giant Scale Stand-Off Scale Sport Scale builds Peanut Scale static scale goodness-knowswhat-else scale Now enter Electric Scale Note above operative word scale Size powerplants variables above longestablished -polished categories mind consider size RC Electric Scale classfor starters Some apartment dwellers may elect some thing 30-in span Others interest facility can elect Y4-scale size range will look bizarre deed its because weve become used size categories over years see no basic reason any-size-goes Electric category cannot set upini tially long learned judging Scale Im sure suitable rules can developed assure judging equivalency independent model size Similarly flight requirements can suitably scaled important thing get Electric Scale Electric-every thing-else going Give modeler full freedom power-system choicejust get Electric introduced Theres plenty time complicate categorize classi fy Electrics future meantime just think 34-in 54-in whatever-inch quiet Scale Electrics flying schoolyard down block should perfectly clear proposal can made work model type just Scale Think about Without first continuing breath no life Happy Landings Bob Kopski 2S West End Dr Lansdale PA 19446 quite few people Phenomenal seminar informal conversa tional part clinic activity past have hosted hour two activi ty Heinz once Roland Boucher opportunity field questions general interest year generally light interest clinic busy excitement flight line dropped seminar Saturday Following Up Last Down Sunday Heinz Bob Boucher Frank Heinrich Jeff Surgnier latter two representing Robbe hosted 'round table' stand round Heinz work table seminar discussions something everyone Earlier mentioned another Electric Fly institutionthe informal Saturday Social Weve getting attendance afar several years visitors normally staying local motel over weekend Three years ago KRC offered some diversion guests social Like rest Electric Fly also low-key gathering takes place clubs regular meeting place Hatfield American Legion Hall KRC ladies bring varied goodies snack liquid refreshments available Legion Guests can relax enjoy change pace flight line Wives kids join too have several door prize drawings visitors including things ladies year fortunate have -Bob Boucher attendance social twisted arm telling us few words about experiences man-powered solar-powered flight successes played key role Bob very entertaining bouncing between light hearted stories some tech nical nature social wrapped up just before midnight thered enough time charge up Sundays flying KRC tries make event easy fun everyone part providing flight-line batteries visitors wouldnt have continually return cars recharging past years several batteries hard time keeping up load anticipated larger requirement year help area obtained loan five highpower line-operated laboratory supplies mate up five auto batteries flight light way fliers could drain amps out batteries charge planes supplies would put amps back next person would have battery same good condition As turned out very heavy attend ance intensive flying supplies real salvation recharging story doesnt end Frank Heinrich Jeff Surgnier Robbe attendance weekend Along other Robbe products brought several automatic chargers offering charging services everyone personally know prod ucts have always easy find Frank tells distribution Robbe charger rapidly improving Any way lots people can say saw charged up 1984 Electric Fly normal affair nature people leave vivid memo ries particular aspects pleasing cant help feel years Electric Fly must have afforded such memories visitors cluded among must surely sheer delight watching Keith Shaw Ann Arbor MI fly brought four planes three new Zomby Old-Timer past visit Keith very likable fellow excel lent craftsman truly outstanding pilot effect Keith one-man Elec tric Fly year flew flying wing Banshee precision aerobatic Colum bia amazing retract-equipped Spitfire Keith went up others came down watch held crowd CyA flight ended ovation brute power persua sion Bob Boucher provided something remember Astro Challenger glider new Astro kit would burst upward leav ing no doubt highest rate climb would hard imagine casual spectator finding something special interest liking three attendees very first Electric Fly have variously attended meets since same time year time reunion Ar150 Model Aviation An ideal way build balsa construc ted model airplane wings fuselage stabilizers elevators rudders Build fast easy straight true Makes other methods obsolete CONTENTS 1 -16 x48 STEEL PLATE 30- MAGNETS 60- MAGNETIC POLES 10-5 UPRIGHTS 10- 1 x 10/32 BOLTS 10- 10/32 NUTS useful tool will last lifetime nothing wear out Magnetically holds balsa parts place gluing No damaged split weakened wood using pins Electric FlyIKopski Continued page 88
Edition: Model Aviation - 1985/01
Page Numbers: 52, 53, 148, 149, 150
Radio Control Electrics Bob Kopski FREQUENT QUESTION am often asked about Leisure Playboy seems builders sure cabin version CG center gravity should fall can tell ismy Playboy flies just great 1 nd main spar about 4/4 leading edge wing comes out about 45% chord seems unusual its because isby present-day design OldTimerand has lifting stabthe tail carries bigger part weight hence relatively aft CG location Mine stable forgiving Ive handed box young totally inexperienced boy ballwith no great worries part something nice boy neighborhoodthe hobby needs youth topic Old-Timers SAM 76 held OT meet past July neighborhoodjust few minutes drive home grounds daughters elementary school Im ac tive OT am interested besides know some great guys heavily involved went over take look around Contest Director Ralph Riddle persuad ed bring out some Electrics dem onstrate Naturally went back home got Playboyand Spectra recently outfitted latter cobalt 15 described below Play boy highly appropriate Spectra should dazzle least few eyes thought OT guys very casualalways seeming have lots fun tried blend alternately flew two planes several times As normal group some folks interested some busy own contest terestsvery understandable what experience showed Playboy fell between could easily outclimb some marginally-powered ignition models absolutely no match contemporary engines Also sky up everything flew well sky down everything came down As far could see Electric could handily fit among Old-Timers cobalt-powered Spectra rather Closeup nine-cell 08 ah pack assembly fits exactly original sixpack did balsa spacers glued cell sleeves clear siliconeBob no longer recoin mends though spac ing permitted continued effectiveness original cooling-air holes planes fuselage floor Note bus bars interconnect ing cells 52 Model Aviation Bob used motors batteries experiment described column L R two interchangeable 05-size ferrite motors six-pack 12 Ah Ni-Cd cells cobalt 15-size motor nine-cell 08 Ah battery pack airborne weight 05 15 systems identical two battery packs identical watt-minutes capability two microawitches used experiment little satisfactory 05size system its Radio Shack 15-size power system such high current drain robust switch mandatory shown can ob ta med either Astro Leisure Although switch lots larger ap preciably heavier Bob aiso used 25-amp fuse systemotherwise switch might have fuse aggressive Old-Timer simply didnt fit day some conversation fol lowed flying learned Electric OT progressing popular combination What shame seems some Electric rules bickering referred last column has adverse affects OT Electricto ex tent some OT leaders present affair want nothing Yup shame natural combination has stifled seems Perhaps might offer suggestion SAM Its just same thing said last issue try out Electric OT cat egory allows anything Electric par ticipateproviding course model appropriate OT Try timed event ROG precision landing seem appropriate Dont bother yourself size weight rules now Allow use battery/motor modelers wish use Permit pilot fly out battery wishes Establish what initially would seem like appropriate flight time maxes allow flexibility local conditions After everyone knows Electric doesnt fly long right Hah guess point get fresh very simple start allow ance Electric power system used key Flight times average determined battery size~ TABLE ONE SPECTRA SOAR FLIGHT TIM E HIGH-POWER FLIGHT SYSTEM FlightTime Nominsec 11439 21346 31359 41527 51657 61327 71313 81326 91446 101403 111515 121601 13918 141500 151101 161143 17932 181035 FlightTime Nomlnsec 191206 201343 211345 22148 231604 241519 251548 261601 2714333 281321 291507 301032 312212 32936 331624 341208 Average 1354 battery weight essentially -same thing relative weights Elec tric power system total airplane pretty much same plane cases power system motor battery will make up about half total model weight bigger system necessarily better Run year two gradually ad just rules experience indicates Get ting restart important thing everything else provided can accept fact nothing perfectly satisfac Continued page 148 January1985 53A Tricky cobalt 15 used experiment actuaiiy smaller diameter 05 motor repiaced shimmed fit motor-mount tube adding four spacer strips 1/4-iri-wide A-in-thick strips double-sticky servo-mounting tape covering -ln-wide strips cut Ace RC giider-skid cicar plastic Curved front edges shims permit motor inserted its mount within piane THE SHAPE OF THINGS TO COME NEW computer-designed 14 x 6 Taipan Ultra highstrength fiberglass re inforced nylon Outstanding perform ance 60-90 2-stroke 4-stroke enginesl List $795/INTRO Price $695 5-Pack 0 TAIPAN True Pitch Value SizeRetailCondor 70-Pack 7 x 4075049450 7 x 6 075 049 450 8x4085055510 8x 6070046420 8x6085055510 9 x 4105069630 9 x 6105069630 10x4125080750 10x6125080750 11x5150097900 11 x 7150097900 Top trade discounts dealer/dist x 6 unreinforced beginner C/L CONDOR HOBBIES 17971 Sky Park Circle Unit D Irvine CA 92714 Telephone 714 2501425 Handling Charges COD & Credit Cards -$475 CSuUiSUPrepaid Order -$250 Robson House Hobby Supplies 222 Clareview Road 0-3 Edmonton Alta Can T5A 3Y5 MC VISA No _________________________ ExpeaFoe Date _________________________________ Signature Name Street Cay State Please alow 3 weeks estra o cueces Invited join National Soaring Society OFFICIAL SOARING SPECIAL INTEREST GROUP YEARLY NATIONAL TOURNAMENTS NATION-WIDE EXCELLENCE AWARDS PROGRAM EXCELLENT BI-MONTHLY NEWSLETTER NSS CONTRIBUTES SUBSTANTIAL AMOUNTS TO EACH F3B SOARING TEAM NSS IS RESPONSIBLE FOR THE ORGANIZATION AND OVERSEEING OF AMA NATS INCLUDING AWARDS BANGUET YEARLY DUES ARE 51200 SPECIAL FAMILY RATES NSS OFFICERS ARE FROM ALL 11 DISTRICTS pL % 9 4z S 0 Informaton Contact JOHN R VOGEL 906 ORCHARD PARK DR GIBSONIA PA 15044 148 Model Aviation depending what reference source used blue used fuselages Stear mans other similar trainers also referred different names sometimes called ANA 501 Light Blue some times True Blue federal standard number ES 15102 paint glossy British Canadian trainers painted yellow also RAE RCAF color being called simply Yellow sample Hobbypoxy reference material matte contem porary aircraft can glossy well formulas ANA 614 Orange Yellow 20 parts H49 Cub Yellow four parts H47 Bright Yellow part H66 Dark Red part H1O White ANA 501 Light Bluefour parts H25 Sky Blue three parts H24 Dark Blue part H65 Bright Red part H67 Maroon RAF/RCAF Yellownine parts H49 Cub Yellow seven parts H47 Bright Yellow three parts H55 Cream two parts H66 Dark Red Eor matte finish mix 11 Hobby poxy HOS Elat Hardener Eor gloss fin ish use either H02 H06 Gloss Quick Spray Hardeners Hobbypoxy has revised updated its Hobbypoxy Painting Pointers Brochure 1985 four-page booklet describes products extensive line finishing materials gives complete structions use Expert methods priming finishing bare balsa fiberglass epoxy glass molded plastics discussed Information giv en painting trimming various types iron-on covering materials greatest interest modelers will highly-detailed very thorough sec tion spray painting techniques includ ing selection proper airbrush compressor equipment brochure available mail no cost Request copy Hobbypoxy Products Pettit Paint Co Inc 36 Pine St Box 378 Rockaway NJ 07866-0378 Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC ElectrlcslKopski Continued page 53 tory everyone Electric OT anyway Same reas ons some folks fly Peanut scale some CL Carrier some RC Helicopterits fun theres something else too getting more fun damental concern kind gaspowered flying Remember school yard mentioned above Such event schoolyard exception Erom what can determine schoolyards closed model flying bet lot would change clean quiet Elec tric power Get point Before getting main event month want recall attention lead photo column Sep tember issue mystery plane pictured open structure brought three writ ten responsesall correct naming model Lockheed Constellation No guessed builder Heinz Koerner Heinz gentleman runs Clin ic annual KRC Electric Ely Connie second first completed technical reasons larger mishap few weeks prior years Electric Ely repaired time event Look next year As promised last column month will describe results date severalmonth experiment involving power system makeup Electrics may recall visitor field sum mer Tom southern California told high rate-of-climb preference Electric gliders out turf compared slower though longer power ascent out way decided try way same time put further test long-held tenet its battery other things being equal determines average total flight time such plane chose now-frequent example Spectra Soar design boring because have lots historic data Some data graphed Part Seven MAs Electric Series March 1984 flight histogram presented showed very clearly average flight time about 13-14 minutes hundreds flights six-cell 12 Ah battery various 05-sized motors data flying generally evening weekend morning air no obvious lift present decided install Cobalt 15 suit able battery trying maintain same weight balance etc Erom bench data knew Cobalt 15 7 x 6 nylon nine cells should have static put power level about 140 wattsmuch before vastly needed just cruise plane worked out very well Both OS motor six-l 2 Ah-cell system Cobalt 15 nine-O8 Ah-cell system weigh about 18A oz although new battery about oz lighter felt certainly close enough make valid test argu ment total flight time should about same both power systems same time give taste significantly faster rate climb shorter total motor-run time Indeed power combination proved definitely much faster-climbing replaced useful power run time just definitely much shorter expected nine 08 Ah Sanyo cells assembled pack would fit exactly six pack 12 Ah cells beenincluding interfacing exist ing cooling-air exit holes cells spaced balsa sticks accomplish assembly held together clear silicone adhesive later proved inadequate adhesive Full Line NEW t 1445 p 115 364 Catalog Now Available glance through new catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsPO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation now would recommend purpose original Radio Shack microswitch replaced much heftier available Astro p/n 4032 Leisure p/n 6006 25 amp fuse installed consistent previous data new battery also charged nor mal safe conservative fashion Specif ically charged pack empty somewhat less its label capacity done constant charge cur rent 30 amps 15 minutes Now results date Ive logged 35 flights shown Table fly ing done 21 different days either mornings evenings some flights different pilots though data limited its very clear nominal flight time Spectra Soar neutral air less same before fact energy stored battery apparently deter mining total average flight time dependent appropriate power sys tem same plane same total weight also means about same average total flight time results whether plane skyrockets about two one-minute very-high-power runs climbs lazily On-Off fashion total four-five minutes Some additional comments order new installation doesnt take plane straight up out sight minute does haul Spectra fast such performance may liking would otherwise just cruise around now necessary stay stick during climb Also installation significantly costly nearly three times power sys tem replaced Furthermore charging nine cells would impasse fliers know Regarding obviously Ive way charge other odd packs well enough terest perhaps construction article would possible other hand can see several dis tinct advantages such climb defi nitely affords quite thrill would thereby appealing blow-a-hole in-the-day crowd course extra power margin can make marginal-weather flying much enjoyablefor times seems like plane may never cut through wind turbulence strong sink Also Ive seen some occa sions looking good thermals since theyre always present south eastern PA found such could high up ie possible get good lift lower altitudes high climb-rate necessary find expediently Further fast-up ap proach may liking Sail plane pilots used winch Finally models equipped speed control high-power-spending capability can called upon needed Otherwise such models can flown reduced power levels thus extending total power-on time necessarily total flight time latter application can quite lot fun So have itfor planes available energy used maximize total flight time gliders OTs bat tery capacity ie watt-minutes deter mines total flight time independent rate power expended part other model pa rameters being equal Roland Boucher Leisure has conducted similar tests has arrived same conclusion Bob Boucher Astro Flight puts same result different terms says final altitude reached whether means slow ascent rapid climb same same battery Are questions last column November 1984 argued establishing initial Electric model categories unburdened complexities power system rules regulations reduces permitting yea verilyencouraging power systems used AMA com petitions offered approach way get organized Electric competition off running Id like expand upon such categoryScaleas detail example Consider Scale enthusiast builds FF CL RC Scale builds January1985 149 MAGIC MAGNET BUILDER W Eldon J Lind Co 2912 Walker Lee Los Alamlto% CA 90720 Precision Scale Giant Scale Stand-Off Scale Sport Scale builds Peanut Scale static scale goodness-knowswhat-else scale Now enter Electric Scale Note above operative word scale Size powerplants variables above longestablished -polished categories mind consider size RC Electric Scale classfor starters Some apartment dwellers may elect some thing 30-in span Others interest facility can elect Y4-scale size range will look bizarre deed its because weve become used size categories over years see no basic reason any-size-goes Electric category cannot set upini tially long learned judging Scale Im sure suitable rules can developed assure judging equivalency independent model size Similarly flight requirements can suitably scaled important thing get Electric Scale Electric-every thing-else going Give modeler full freedom power-system choicejust get Electric introduced Theres plenty time complicate categorize classi fy Electrics future meantime just think 34-in 54-in whatever-inch quiet Scale Electrics flying schoolyard down block should perfectly clear proposal can made work model type just Scale Think about Without first continuing breath no life Happy Landings Bob Kopski 2S West End Dr Lansdale PA 19446 quite few people Phenomenal seminar informal conversa tional part clinic activity past have hosted hour two activi ty Heinz once Roland Boucher opportunity field questions general interest year generally light interest clinic busy excitement flight line dropped seminar Saturday Following Up Last Down Sunday Heinz Bob Boucher Frank Heinrich Jeff Surgnier latter two representing Robbe hosted 'round table' stand round Heinz work table seminar discussions something everyone Earlier mentioned another Electric Fly institutionthe informal Saturday Social Weve getting attendance afar several years visitors normally staying local motel over weekend Three years ago KRC offered some diversion guests social Like rest Electric Fly also low-key gathering takes place clubs regular meeting place Hatfield American Legion Hall KRC ladies bring varied goodies snack liquid refreshments available Legion Guests can relax enjoy change pace flight line Wives kids join too have several door prize drawings visitors including things ladies year fortunate have -Bob Boucher attendance social twisted arm telling us few words about experiences man-powered solar-powered flight successes played key role Bob very entertaining bouncing between light hearted stories some tech nical nature social wrapped up just before midnight thered enough time charge up Sundays flying KRC tries make event easy fun everyone part providing flight-line batteries visitors wouldnt have continually return cars recharging past years several batteries hard time keeping up load anticipated larger requirement year help area obtained loan five highpower line-operated laboratory supplies mate up five auto batteries flight light way fliers could drain amps out batteries charge planes supplies would put amps back next person would have battery same good condition As turned out very heavy attend ance intensive flying supplies real salvation recharging story doesnt end Frank Heinrich Jeff Surgnier Robbe attendance weekend Along other Robbe products brought several automatic chargers offering charging services everyone personally know prod ucts have always easy find Frank tells distribution Robbe charger rapidly improving Any way lots people can say saw charged up 1984 Electric Fly normal affair nature people leave vivid memo ries particular aspects pleasing cant help feel years Electric Fly must have afforded such memories visitors cluded among must surely sheer delight watching Keith Shaw Ann Arbor MI fly brought four planes three new Zomby Old-Timer past visit Keith very likable fellow excel lent craftsman truly outstanding pilot effect Keith one-man Elec tric Fly year flew flying wing Banshee precision aerobatic Colum bia amazing retract-equipped Spitfire Keith went up others came down watch held crowd CyA flight ended ovation brute power persua sion Bob Boucher provided something remember Astro Challenger glider new Astro kit would burst upward leav ing no doubt highest rate climb would hard imagine casual spectator finding something special interest liking three attendees very first Electric Fly have variously attended meets since same time year time reunion Ar150 Model Aviation An ideal way build balsa construc ted model airplane wings fuselage stabilizers elevators rudders Build fast easy straight true Makes other methods obsolete CONTENTS 1 -16 x48 STEEL PLATE 30- MAGNETS 60- MAGNETIC POLES 10-5 UPRIGHTS 10- 1 x 10/32 BOLTS 10- 10/32 NUTS useful tool will last lifetime nothing wear out Magnetically holds balsa parts place gluing No damaged split weakened wood using pins Electric FlyIKopski Continued page 88
Edition: Model Aviation - 1985/01
Page Numbers: 52, 53, 148, 149, 150
Radio Control Electrics Bob Kopski FREQUENT QUESTION am often asked about Leisure Playboy seems builders sure cabin version CG center gravity should fall can tell ismy Playboy flies just great 1 nd main spar about 4/4 leading edge wing comes out about 45% chord seems unusual its because isby present-day design OldTimerand has lifting stabthe tail carries bigger part weight hence relatively aft CG location Mine stable forgiving Ive handed box young totally inexperienced boy ballwith no great worries part something nice boy neighborhoodthe hobby needs youth topic Old-Timers SAM 76 held OT meet past July neighborhoodjust few minutes drive home grounds daughters elementary school Im ac tive OT am interested besides know some great guys heavily involved went over take look around Contest Director Ralph Riddle persuad ed bring out some Electrics dem onstrate Naturally went back home got Playboyand Spectra recently outfitted latter cobalt 15 described below Play boy highly appropriate Spectra should dazzle least few eyes thought OT guys very casualalways seeming have lots fun tried blend alternately flew two planes several times As normal group some folks interested some busy own contest terestsvery understandable what experience showed Playboy fell between could easily outclimb some marginally-powered ignition models absolutely no match contemporary engines Also sky up everything flew well sky down everything came down As far could see Electric could handily fit among Old-Timers cobalt-powered Spectra rather Closeup nine-cell 08 ah pack assembly fits exactly original sixpack did balsa spacers glued cell sleeves clear siliconeBob no longer recoin mends though spac ing permitted continued effectiveness original cooling-air holes planes fuselage floor Note bus bars interconnect ing cells 52 Model Aviation Bob used motors batteries experiment described column L R two interchangeable 05-size ferrite motors six-pack 12 Ah Ni-Cd cells cobalt 15-size motor nine-cell 08 Ah battery pack airborne weight 05 15 systems identical two battery packs identical watt-minutes capability two microawitches used experiment little satisfactory 05size system its Radio Shack 15-size power system such high current drain robust switch mandatory shown can ob ta med either Astro Leisure Although switch lots larger ap preciably heavier Bob aiso used 25-amp fuse systemotherwise switch might have fuse aggressive Old-Timer simply didnt fit day some conversation fol lowed flying learned Electric OT progressing popular combination What shame seems some Electric rules bickering referred last column has adverse affects OT Electricto ex tent some OT leaders present affair want nothing Yup shame natural combination has stifled seems Perhaps might offer suggestion SAM Its just same thing said last issue try out Electric OT cat egory allows anything Electric par ticipateproviding course model appropriate OT Try timed event ROG precision landing seem appropriate Dont bother yourself size weight rules now Allow use battery/motor modelers wish use Permit pilot fly out battery wishes Establish what initially would seem like appropriate flight time maxes allow flexibility local conditions After everyone knows Electric doesnt fly long right Hah guess point get fresh very simple start allow ance Electric power system used key Flight times average determined battery size~ TABLE ONE SPECTRA SOAR FLIGHT TIM E HIGH-POWER FLIGHT SYSTEM FlightTime Nominsec 11439 21346 31359 41527 51657 61327 71313 81326 91446 101403 111515 121601 13918 141500 151101 161143 17932 181035 FlightTime Nomlnsec 191206 201343 211345 22148 231604 241519 251548 261601 2714333 281321 291507 301032 312212 32936 331624 341208 Average 1354 battery weight essentially -same thing relative weights Elec tric power system total airplane pretty much same plane cases power system motor battery will make up about half total model weight bigger system necessarily better Run year two gradually ad just rules experience indicates Get ting restart important thing everything else provided can accept fact nothing perfectly satisfac Continued page 148 January1985 53A Tricky cobalt 15 used experiment actuaiiy smaller diameter 05 motor repiaced shimmed fit motor-mount tube adding four spacer strips 1/4-iri-wide A-in-thick strips double-sticky servo-mounting tape covering -ln-wide strips cut Ace RC giider-skid cicar plastic Curved front edges shims permit motor inserted its mount within piane THE SHAPE OF THINGS TO COME NEW computer-designed 14 x 6 Taipan Ultra highstrength fiberglass re inforced nylon Outstanding perform ance 60-90 2-stroke 4-stroke enginesl List $795/INTRO Price $695 5-Pack 0 TAIPAN True Pitch Value SizeRetailCondor 70-Pack 7 x 4075049450 7 x 6 075 049 450 8x4085055510 8x 6070046420 8x6085055510 9 x 4105069630 9 x 6105069630 10x4125080750 10x6125080750 11x5150097900 11 x 7150097900 Top trade discounts dealer/dist x 6 unreinforced beginner C/L CONDOR HOBBIES 17971 Sky Park Circle Unit D Irvine CA 92714 Telephone 714 2501425 Handling Charges COD & Credit Cards -$475 CSuUiSUPrepaid Order -$250 Robson House Hobby Supplies 222 Clareview Road 0-3 Edmonton Alta Can T5A 3Y5 MC VISA No _________________________ ExpeaFoe Date _________________________________ Signature Name Street Cay State Please alow 3 weeks estra o cueces Invited join National Soaring Society OFFICIAL SOARING SPECIAL INTEREST GROUP YEARLY NATIONAL TOURNAMENTS NATION-WIDE EXCELLENCE AWARDS PROGRAM EXCELLENT BI-MONTHLY NEWSLETTER NSS CONTRIBUTES SUBSTANTIAL AMOUNTS TO EACH F3B SOARING TEAM NSS IS RESPONSIBLE FOR THE ORGANIZATION AND OVERSEEING OF AMA NATS INCLUDING AWARDS BANGUET YEARLY DUES ARE 51200 SPECIAL FAMILY RATES NSS OFFICERS ARE FROM ALL 11 DISTRICTS pL % 9 4z S 0 Informaton Contact JOHN R VOGEL 906 ORCHARD PARK DR GIBSONIA PA 15044 148 Model Aviation depending what reference source used blue used fuselages Stear mans other similar trainers also referred different names sometimes called ANA 501 Light Blue some times True Blue federal standard number ES 15102 paint glossy British Canadian trainers painted yellow also RAE RCAF color being called simply Yellow sample Hobbypoxy reference material matte contem porary aircraft can glossy well formulas ANA 614 Orange Yellow 20 parts H49 Cub Yellow four parts H47 Bright Yellow part H66 Dark Red part H1O White ANA 501 Light Bluefour parts H25 Sky Blue three parts H24 Dark Blue part H65 Bright Red part H67 Maroon RAF/RCAF Yellownine parts H49 Cub Yellow seven parts H47 Bright Yellow three parts H55 Cream two parts H66 Dark Red Eor matte finish mix 11 Hobby poxy HOS Elat Hardener Eor gloss fin ish use either H02 H06 Gloss Quick Spray Hardeners Hobbypoxy has revised updated its Hobbypoxy Painting Pointers Brochure 1985 four-page booklet describes products extensive line finishing materials gives complete structions use Expert methods priming finishing bare balsa fiberglass epoxy glass molded plastics discussed Information giv en painting trimming various types iron-on covering materials greatest interest modelers will highly-detailed very thorough sec tion spray painting techniques includ ing selection proper airbrush compressor equipment brochure available mail no cost Request copy Hobbypoxy Products Pettit Paint Co Inc 36 Pine St Box 378 Rockaway NJ 07866-0378 Bob Dolly Wischer S-221 Lapham Peak Rd Delafleld WI 53018 RC ElectrlcslKopski Continued page 53 tory everyone Electric OT anyway Same reas ons some folks fly Peanut scale some CL Carrier some RC Helicopterits fun theres something else too getting more fun damental concern kind gaspowered flying Remember school yard mentioned above Such event schoolyard exception Erom what can determine schoolyards closed model flying bet lot would change clean quiet Elec tric power Get point Before getting main event month want recall attention lead photo column Sep tember issue mystery plane pictured open structure brought three writ ten responsesall correct naming model Lockheed Constellation No guessed builder Heinz Koerner Heinz gentleman runs Clin ic annual KRC Electric Ely Connie second first completed technical reasons larger mishap few weeks prior years Electric Ely repaired time event Look next year As promised last column month will describe results date severalmonth experiment involving power system makeup Electrics may recall visitor field sum mer Tom southern California told high rate-of-climb preference Electric gliders out turf compared slower though longer power ascent out way decided try way same time put further test long-held tenet its battery other things being equal determines average total flight time such plane chose now-frequent example Spectra Soar design boring because have lots historic data Some data graphed Part Seven MAs Electric Series March 1984 flight histogram presented showed very clearly average flight time about 13-14 minutes hundreds flights six-cell 12 Ah battery various 05-sized motors data flying generally evening weekend morning air no obvious lift present decided install Cobalt 15 suit able battery trying maintain same weight balance etc Erom bench data knew Cobalt 15 7 x 6 nylon nine cells should have static put power level about 140 wattsmuch before vastly needed just cruise plane worked out very well Both OS motor six-l 2 Ah-cell system Cobalt 15 nine-O8 Ah-cell system weigh about 18A oz although new battery about oz lighter felt certainly close enough make valid test argu ment total flight time should about same both power systems same time give taste significantly faster rate climb shorter total motor-run time Indeed power combination proved definitely much faster-climbing replaced useful power run time just definitely much shorter expected nine 08 Ah Sanyo cells assembled pack would fit exactly six pack 12 Ah cells beenincluding interfacing exist ing cooling-air exit holes cells spaced balsa sticks accomplish assembly held together clear silicone adhesive later proved inadequate adhesive Full Line NEW t 1445 p 115 364 Catalog Now Available glance through new catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsPO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation now would recommend purpose original Radio Shack microswitch replaced much heftier available Astro p/n 4032 Leisure p/n 6006 25 amp fuse installed consistent previous data new battery also charged nor mal safe conservative fashion Specif ically charged pack empty somewhat less its label capacity done constant charge cur rent 30 amps 15 minutes Now results date Ive logged 35 flights shown Table fly ing done 21 different days either mornings evenings some flights different pilots though data limited its very clear nominal flight time Spectra Soar neutral air less same before fact energy stored battery apparently deter mining total average flight time dependent appropriate power sys tem same plane same total weight also means about same average total flight time results whether plane skyrockets about two one-minute very-high-power runs climbs lazily On-Off fashion total four-five minutes Some additional comments order new installation doesnt take plane straight up out sight minute does haul Spectra fast such performance may liking would otherwise just cruise around now necessary stay stick during climb Also installation significantly costly nearly three times power sys tem replaced Furthermore charging nine cells would impasse fliers know Regarding obviously Ive way charge other odd packs well enough terest perhaps construction article would possible other hand can see several dis tinct advantages such climb defi nitely affords quite thrill would thereby appealing blow-a-hole in-the-day crowd course extra power margin can make marginal-weather flying much enjoyablefor times seems like plane may never cut through wind turbulence strong sink Also Ive seen some occa sions looking good thermals since theyre always present south eastern PA found such could high up ie possible get good lift lower altitudes high climb-rate necessary find expediently Further fast-up ap proach may liking Sail plane pilots used winch Finally models equipped speed control high-power-spending capability can called upon needed Otherwise such models can flown reduced power levels thus extending total power-on time necessarily total flight time latter application can quite lot fun So have itfor planes available energy used maximize total flight time gliders OTs bat tery capacity ie watt-minutes deter mines total flight time independent rate power expended part other model pa rameters being equal Roland Boucher Leisure has conducted similar tests has arrived same conclusion Bob Boucher Astro Flight puts same result different terms says final altitude reached whether means slow ascent rapid climb same same battery Are questions last column November 1984 argued establishing initial Electric model categories unburdened complexities power system rules regulations reduces permitting yea verilyencouraging power systems used AMA com petitions offered approach way get organized Electric competition off running Id like expand upon such categoryScaleas detail example Consider Scale enthusiast builds FF CL RC Scale builds January1985 149 MAGIC MAGNET BUILDER W Eldon J Lind Co 2912 Walker Lee Los Alamlto% CA 90720 Precision Scale Giant Scale Stand-Off Scale Sport Scale builds Peanut Scale static scale goodness-knowswhat-else scale Now enter Electric Scale Note above operative word scale Size powerplants variables above longestablished -polished categories mind consider size RC Electric Scale classfor starters Some apartment dwellers may elect some thing 30-in span Others interest facility can elect Y4-scale size range will look bizarre deed its because weve become used size categories over years see no basic reason any-size-goes Electric category cannot set upini tially long learned judging Scale Im sure suitable rules can developed assure judging equivalency independent model size Similarly flight requirements can suitably scaled important thing get Electric Scale Electric-every thing-else going Give modeler full freedom power-system choicejust get Electric introduced Theres plenty time complicate categorize classi fy Electrics future meantime just think 34-in 54-in whatever-inch quiet Scale Electrics flying schoolyard down block should perfectly clear proposal can made work model type just Scale Think about Without first continuing breath no life Happy Landings Bob Kopski 2S West End Dr Lansdale PA 19446 quite few people Phenomenal seminar informal conversa tional part clinic activity past have hosted hour two activi ty Heinz once Roland Boucher opportunity field questions general interest year generally light interest clinic busy excitement flight line dropped seminar Saturday Following Up Last Down Sunday Heinz Bob Boucher Frank Heinrich Jeff Surgnier latter two representing Robbe hosted 'round table' stand round Heinz work table seminar discussions something everyone Earlier mentioned another Electric Fly institutionthe informal Saturday Social Weve getting attendance afar several years visitors normally staying local motel over weekend Three years ago KRC offered some diversion guests social Like rest Electric Fly also low-key gathering takes place clubs regular meeting place Hatfield American Legion Hall KRC ladies bring varied goodies snack liquid refreshments available Legion Guests can relax enjoy change pace flight line Wives kids join too have several door prize drawings visitors including things ladies year fortunate have -Bob Boucher attendance social twisted arm telling us few words about experiences man-powered solar-powered flight successes played key role Bob very entertaining bouncing between light hearted stories some tech nical nature social wrapped up just before midnight thered enough time charge up Sundays flying KRC tries make event easy fun everyone part providing flight-line batteries visitors wouldnt have continually return cars recharging past years several batteries hard time keeping up load anticipated larger requirement year help area obtained loan five highpower line-operated laboratory supplies mate up five auto batteries flight light way fliers could drain amps out batteries charge planes supplies would put amps back next person would have battery same good condition As turned out very heavy attend ance intensive flying supplies real salvation recharging story doesnt end Frank Heinrich Jeff Surgnier Robbe attendance weekend Along other Robbe products brought several automatic chargers offering charging services everyone personally know prod ucts have always easy find Frank tells distribution Robbe charger rapidly improving Any way lots people can say saw charged up 1984 Electric Fly normal affair nature people leave vivid memo ries particular aspects pleasing cant help feel years Electric Fly must have afforded such memories visitors cluded among must surely sheer delight watching Keith Shaw Ann Arbor MI fly brought four planes three new Zomby Old-Timer past visit Keith very likable fellow excel lent craftsman truly outstanding pilot effect Keith one-man Elec tric Fly year flew flying wing Banshee precision aerobatic Colum bia amazing retract-equipped Spitfire Keith went up others came down watch held crowd CyA flight ended ovation brute power persua sion Bob Boucher provided something remember Astro Challenger glider new Astro kit would burst upward leav ing no doubt highest rate climb would hard imagine casual spectator finding something special interest liking three attendees very first Electric Fly have variously attended meets since same time year time reunion Ar150 Model Aviation An ideal way build balsa construc ted model airplane wings fuselage stabilizers elevators rudders Build fast easy straight true Makes other methods obsolete CONTENTS 1 -16 x48 STEEL PLATE 30- MAGNETS 60- MAGNETIC POLES 10-5 UPRIGHTS 10- 1 x 10/32 BOLTS 10- 10/32 NUTS useful tool will last lifetime nothing wear out Magnetically holds balsa parts place gluing No damaged split weakened wood using pins Electric FlyIKopski Continued page 88