MORE Leisure Amptique December 1987 column discussed model some detail offered some photos youre thinking about building plane may want review issue Some time has passed since written now five Aniptiques flying locally several made appearance 87 KRC Electric Fly seeing flying can now offer some further thoughts very fine model First accumulating experience reinforcing some t14 observations made previously includes fact kits provisions cool ing motor batteries have proven inade quate general motor battery routinely quite hot after flight local Amp tiques have outfitted additional airscoops enlarged air exits Also fuselage former front battery must opened up allow free air passage battery area youre sure about thermal condition motor battery following flight take wing off feel its hot let cool before charging again Another past point Some small-diameter gear drive output shafts simply holding up slightest prop contact ground Therefore may want seriously consider ex tending landing gear better prop clearanceas mentioned December issue Some recent discoveries lite ply former landing gear wire attached often failing Apparently some form ers bit weak adequately installed Local advice substitute 1A-in birch ply particular piece reinforce stallation some balsa front back former joins balsa fuselage sides five Amptiques Ive personally flown two have Leisure LT-50 systems two have Leisure Stock systems Ky osho system very nose-up attitude under power required Down elevator trim latter would removed power-off flight current recommendation eliminate reduce trimming annoyance install motor about 30 downthrust Finally Amptique very easy ROG grass enhancement regard steerable tail wheel five planes mentioned above have typical sim ple installation shown photos simple addition especially speedcontrolled motor can add significantly flying enjoyment Now please dont anyone misinterpret above Amptique has become per sonal number-one recommendation po tential Electric fliers ask about good first Electric kit nature above items merely represent several ways enhance models flyabiity durability wish Nothing should discourage build ing flying Leisure Amptique Leisure power systems bring share ques tions readers Most just want know difference between modified LT-50 stock armature modified motor wound given number battery cells same prop develops power flies shorter flights stock ver sion also costs have run geared versions 25 1 both bench have flown both Amptiques static bench experience agrees flight experience stock version does de velop much power Nevertheless ade quate Amptique cost limiting concern would suggest consider LT-50 instead espe cially intend use speed control gives flexibility having high power aggressive takeoffs ability back off power gentle climb cruise speed con trol used way allows essentially same motor run time both motor types course geared systems best applied 46 Model Aviation Radio Control Electrics Bob Kopski 25 se End Dr Lansdaie PA p446 Keith Shaw brought new Zlin 526 87 KRC Electric fly Plane spans 65 has 670 sq area weighs 75 lb Motivation Astro 60 direct drive 24 Sanyo 8CR cells Jomar SC4 controls rpm 11 x 8 Rev-Up fan super flier Somewhere photo Naomi Wilson hubby Johns Leisure Amptique made Its first flight KRC Electric Fly Power Kyosho 360 PT Transparent red MonoKote covering shows off planes strong light weight wing structure Steerable tail wheel installation L Leisure Amptique typical several flown Bobs locale makes easy ground steering grass Note large cooling-air exit-hole fuselage bottom Author Kopskis bizarre Ampeater design R just-for-fun profile Electric bipe flies absolutely great Power Astro cobalt 15 dozen 800 mAh cells Jomar SC-4 speed controller Almost everything stuck fuselage side double-sticky tape Airfoil Ritz section Plane weighs 48 oz Motor battery runs super-cool reference Jomars speed controllers Top-to-Bottom SC-5 SC-4 SC-3 SC-5 4-8 cells SC-4 best allaround unit SC-3 handles biggest systems includes optional electronic brake func tion supplied No 12 high-flex wire low-loss Sermos Snap connectors relatively larger slower models exemplified Old-Timers Amptique etc have no recent experience using motors direct-drive applications cant comment firsthand knowledge Perhaps will change future contrary geared systems above direct-dxiye systems best ap plied relatively smaller faster models such Wasp Now some bench performance informa tion two geared Leisures using Top Flite 10 x 6 wood prop data format needs some explanation bench-running motor typi cally choose between two parameter options de pending what Im trying accomplish option vary applied voltage variable high-power power supply simulate changing number cells one record resulting current rpm numbers step other option set desired rpm ad justing voltage needed recording voltage current Choosing option allows compare input power various motors voltage times current under same load prop rpm conditions happens method used data below MOTOR Modified Stock RPM 5000 6000 5000 6000 VOLTS 473 609 639 794 AMPS 1185 173 948 137 INPUJ POWER Watts 56 105 61 109 So what does mean some things data tells us First both motor/gear drives require just about same input power turn same prop same speed small differences shown easily fall categories strumentation errors variation caused fact motors run different days shop air probably different temper ature humidity So Ive often said takes about same motor power input turn same prop same rpm almost no matter what motor proContinued page 139 NEW Fourmost Flush Button Hatch Release No Springs No Snaps No Rubber Bands Price $350 Flush Button allows modeler easy access hatch compart ment just finger tip Flush Button constructed lie completely flush surface hatch pro viding clean areodynamic finish Molded white device _________________________________ may painted match finish Fourmost Products 4040 24TH AVENUEFOREST GROVE OR 97116 perfectly prupuruoriu iu modeling Curtlss Robin5 049 Engines -Channel RIC 41 wingspan Electric Power Optional 622*6 K 003 Very few full scale ajrcatt ideally uuited model flight appealing old curtisu Robin born spruce linen age beautdully proportroned rubber electric glum engines Easy tan build trainerlike performance Flyfine Modef 0 Catalog 505Phone 703 273-0503 MODELS INC FLYLINE Box 2138 Fairfax VirginIa 22031 USA 503 357-2732 February 1988 47 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GWES FOUR FORMULAS 5-MIN 10 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOBSYPOXY DIVISION Pettt Pant Company fnQ 36 Pine Street Rociraway NJ 07866 *925 6975AVAILABLE AT AMERICAS*525 FINEST HOBBY SHOPS DISTRIBUTED BY WflHI ZND US 1*558 soo s cui s ad cudoro CA 03422 1 408-1717 Heat-Shrink/Murray Continued page 134 Thanks Art Kramer Henry Haffle Coverite Lawrence King Carl Goldberg Models Inc Mike Gretz Sig Manufacturing Inc Scott Chris tensen Top Flite samples new products and/or assistance re viewing information Thanks also Bob Huelsbeck Valley Aero Model ers provided samples extensive collection scraps About author Lee Murray Senior Research Associate large midwestern film converter Lee active RC Soaring computers References Ref 1 ASTM abbreviation Amer ican Society Testing Materials organization industry representatives de voted test standardization Ref 2 Packagings Encyclopedia 1987 Newton Massachusetts Cahners Publish ing Co 1987 Cahners Publishing Co Newton MA 02158-1630 Ref 3 ASTM D882 801 Tensile Proper ties Thin Plastic Sheeting Ref 4 ASTM D256 35 Impact Resis tance Plastics Electrical Insulating Materials Test Spencer Impact Ref 5 ASTM D1424 32 Tear Resis tance Woven Fabrics Falling Pendu lum Elmendori Apparatus Ref 6 WP Brennan Thermomechanical Analysis Polyethylene FilmThermal Analysis Application Study 23 Elmer Corp Instrument Div Norwalk CT 06856 Ref 7 GW Urbanczyk G Michalak Influence Annealing Ther mal Properties Polyethylene Terephtha late Fibers Heat Capacity Annealed PET Fibers Journal Applied Poly Sci 3 RC Electrics/Kopski Continued page 47 vided motor suitable given load Next data clearly shows modi fled motor requires less voltage cur rent turn prop given rpm means given number cells modified version will develop power said above does running higher rpmper-volt characteristic usually achieved reducing number turns armature pole OK So much mini motor lesson new Leisure catalog can yours sending stamped self-addressed business-size envelope Leisure 22971 Triton Way Unit B Laguna Hill CA 92653 just got new very colorful edition contains new addition Lei sure line kitsthe American Eaglet pretty Scale version 1931 classic lightplane looks like should very appealing growing number Electric modelers want fly Scale As write October 25 have seen kit advertising Perhaps will readily available time read Meanwhile can send catalog tell em Bob sent ya Caliphonce again Ive discussing plane off since July 87 column Over months Ive shared thoughts photos during time Ive accumulating very long flight log259 flights particular Ive accumulating flight expe rience large number power systems some listed October 87 issue Im now finally position offer complete list including geared-system examples So further delay heres table CALIPH DIRECT-DRIVE SYSTEMS MOTOR CELLSMABPROPS Keller 25/1212 8009 x 5 TEW 9 x 6 TEW 9 x 6 TN Astro 15 cobalt12 8005 x 4 TEW 8 x 4 TEN 8 x 4 TN 7 x 6 TEN 9508x5TEW 10 9508x6TEw 8 x 6 TEN 9 950Sx6TFN 12005x6TFN Astro 15 Super Femte12 800as w/cobalt 10 950as w/cobslt Continued page 140 SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALS COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & K&B PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC WE ALSO STOCK CARBON FIBER KLO1Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5W 7W LOOP RUBBER BANDS KSB SEELIG & IGMTION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES PARTS EVERYTHING YOU NEED FOR OLD TTAERINCLUDING REPLICA OR WICK ENGINES February 1988 139 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON VISA OR MASTERCARD OLD TIMER SUPPLIES Zu NA SAVVS famous line hobby aawa Razor #200 Universal #500 RO SOARING DIGEST A monthly publication covering International RC Soaring Scene S l6lyearin USA US S2OIyr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 4079 Payson AZ 85547 Replacement Blades available dealer ~1Su1y P0 Box 3857 Torrance CA 90610 ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING HANDLING FEE * 850 FOR INSURANCE ADD S 100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX GATOR RIC PRODUCTS 7 An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area-860 sq Complete Oelux Kit515995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjUstment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect espensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slipf phenolic sockets build wing structure Now size models 718dias2S 895 l/diax2S 995 ldiax3S1495 feather Ilte glass cloth 7 ozIsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve PullerS 795 Bearing PullerS 695 BothFot$1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure WAU aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instructions log book carrying caseS 795 NEWI WING MOUNTING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included $S95 HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes Mm wingspan L weight Basic Kit 300 sq InPre Built Kit Kyosho 360 ST* 7i200 6x4TFW CALIPH GEAR-DRIVE SYSTEMS MOTORCELLS MAR Astro 15 Cobalt Geared* 12800 Astro 05 Cobalt Geared Kyosho 360PT 15/38 ratio Kyosho 360ST 25 RPB** PROPS 11 x 75 Z 9x8K lOx 6 TFW 128009x4TFN 9 x 5 TFW 9 x 4 TN 9** 1200 9 s 7 TFW 7**12009x8K 91200 9x7TFW 8 x 5 TFW 71200 9x8TFW 712009x8K Notes flights electronic speed control TNTornado nylon TFNTop Flite nylon TFWTop Flise wood KKyosho ZZinger Comments conclusions First Caliphand general planes similar configuration size about 400 sq weight 48-50 ozwhile system described above will pull plane through air some rather badly some partic ularly serious drawbacks noted * reconsmended specific purpose Second some gear-drive combinations fly plane quite comfortably noted ** economy primary suggest Kyo sho 360 ST 251 RPB gears on7 x 12 AH cells 9 x 8 Kyosho propwith precau tion allowing prop hit ground Third best performers directdrive Astro Cobalt 15 Super Ferrite 15 either 10- 12-cell combinations Keller 25/12 combinations shown 12-cell combinations peppiest econ omy mandatory choose ferrite/ 10-cell se lection feel totally comfortable Finally about Caliph itself have aban doned use aileron-equipped wing because regular wing flies much betterbut dont know plane holds current KRC spin record 36 cash prize offered Electric Fly first break did An announcement about connector changes has just made Astro Future Astro prod ucts will come equipped popular Tamiya connectors popularized Electric cars used several other Electric flight systems including Leisure Goldberg Davey Great Planes Ky osho two-conductor connectors Fiberglass Fuselage molded wing Joiner tube Plug-In Wings rglass Belly Pan Optional Plastic Fiberglass Canopy Pro-Cut Holes Wing Joiner Tubes Ultrallght Honeycomb Wingcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9656 116ASt North Delta British Columbia V4C6Z4 Canada $12500 $32500 604-588-0605 quite bit bulky long-used Astro/Molex type See photo several con nectors December 1987 column Astro has included some Molex-to-Tamiya con version jumpers recent parts/price list reconimend replacing Molex connectors di rectly avoid increased wiring mess electri cal losses resulting wire connector interfaces Anyway change Astro now permits very easy replacement popular lower-cost ferrite motors cobalts wanting go way dont want fool around wiring happy ending has come story way ward Electric 87 KRC Electric Fly Saturday affair outcry dont have calling attention gracefislly circling climbing sport job way out hori zon Somehow model remained remark ably good trim radio guidance lost merely Free Righted long timegetting smaller smaller finally disappearing everyones sight CD Bruce Fenstermacher took off foot plane outpaced him carried breezy lift following week Bruce looked again foot air lightplane spotting largely green-colored model green trees tough task Bruce also ran add local paper no luck few weeks passed KRC President John Hickey noticed classified ad paper about found lost Electric seems young girl sported course John responded ad Identification/confirmation bit compli cated because weather obliterated identifying info model However follow ing some phone calls model properly identified belonging other AMA Executive Director John Worth Close ex amination model suggests possibly receiver battery fell out hatch opening leaving servos werewhich just situation needed fly just great itself add story model made its way back John hands Jay Gerber lives near area just happened heading down Virginia way latter name sounds familiarit should Jay man behind camera such all-time great film classics AMAs Diamonds Sky filmed part 85 KRC Electric Fly Please direct comment question SASE please address given start columnand please put ID on/in models permanent weatherproof way 140 Model Aviation TIGER TAIL 45 DELUX ALL BALSA KIT See Oealer Order Oirect Include $2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano acola FL 32514 4768639
Edition: Model Aviation - 1988/02
Page Numbers: 46, 47, 139, 140
MORE Leisure Amptique December 1987 column discussed model some detail offered some photos youre thinking about building plane may want review issue Some time has passed since written now five Aniptiques flying locally several made appearance 87 KRC Electric Fly seeing flying can now offer some further thoughts very fine model First accumulating experience reinforcing some t14 observations made previously includes fact kits provisions cool ing motor batteries have proven inade quate general motor battery routinely quite hot after flight local Amp tiques have outfitted additional airscoops enlarged air exits Also fuselage former front battery must opened up allow free air passage battery area youre sure about thermal condition motor battery following flight take wing off feel its hot let cool before charging again Another past point Some small-diameter gear drive output shafts simply holding up slightest prop contact ground Therefore may want seriously consider ex tending landing gear better prop clearanceas mentioned December issue Some recent discoveries lite ply former landing gear wire attached often failing Apparently some form ers bit weak adequately installed Local advice substitute 1A-in birch ply particular piece reinforce stallation some balsa front back former joins balsa fuselage sides five Amptiques Ive personally flown two have Leisure LT-50 systems two have Leisure Stock systems Ky osho system very nose-up attitude under power required Down elevator trim latter would removed power-off flight current recommendation eliminate reduce trimming annoyance install motor about 30 downthrust Finally Amptique very easy ROG grass enhancement regard steerable tail wheel five planes mentioned above have typical sim ple installation shown photos simple addition especially speedcontrolled motor can add significantly flying enjoyment Now please dont anyone misinterpret above Amptique has become per sonal number-one recommendation po tential Electric fliers ask about good first Electric kit nature above items merely represent several ways enhance models flyabiity durability wish Nothing should discourage build ing flying Leisure Amptique Leisure power systems bring share ques tions readers Most just want know difference between modified LT-50 stock armature modified motor wound given number battery cells same prop develops power flies shorter flights stock ver sion also costs have run geared versions 25 1 both bench have flown both Amptiques static bench experience agrees flight experience stock version does de velop much power Nevertheless ade quate Amptique cost limiting concern would suggest consider LT-50 instead espe cially intend use speed control gives flexibility having high power aggressive takeoffs ability back off power gentle climb cruise speed con trol used way allows essentially same motor run time both motor types course geared systems best applied 46 Model Aviation Radio Control Electrics Bob Kopski 25 se End Dr Lansdaie PA p446 Keith Shaw brought new Zlin 526 87 KRC Electric fly Plane spans 65 has 670 sq area weighs 75 lb Motivation Astro 60 direct drive 24 Sanyo 8CR cells Jomar SC4 controls rpm 11 x 8 Rev-Up fan super flier Somewhere photo Naomi Wilson hubby Johns Leisure Amptique made Its first flight KRC Electric Fly Power Kyosho 360 PT Transparent red MonoKote covering shows off planes strong light weight wing structure Steerable tail wheel installation L Leisure Amptique typical several flown Bobs locale makes easy ground steering grass Note large cooling-air exit-hole fuselage bottom Author Kopskis bizarre Ampeater design R just-for-fun profile Electric bipe flies absolutely great Power Astro cobalt 15 dozen 800 mAh cells Jomar SC-4 speed controller Almost everything stuck fuselage side double-sticky tape Airfoil Ritz section Plane weighs 48 oz Motor battery runs super-cool reference Jomars speed controllers Top-to-Bottom SC-5 SC-4 SC-3 SC-5 4-8 cells SC-4 best allaround unit SC-3 handles biggest systems includes optional electronic brake func tion supplied No 12 high-flex wire low-loss Sermos Snap connectors relatively larger slower models exemplified Old-Timers Amptique etc have no recent experience using motors direct-drive applications cant comment firsthand knowledge Perhaps will change future contrary geared systems above direct-dxiye systems best ap plied relatively smaller faster models such Wasp Now some bench performance informa tion two geared Leisures using Top Flite 10 x 6 wood prop data format needs some explanation bench-running motor typi cally choose between two parameter options de pending what Im trying accomplish option vary applied voltage variable high-power power supply simulate changing number cells one record resulting current rpm numbers step other option set desired rpm ad justing voltage needed recording voltage current Choosing option allows compare input power various motors voltage times current under same load prop rpm conditions happens method used data below MOTOR Modified Stock RPM 5000 6000 5000 6000 VOLTS 473 609 639 794 AMPS 1185 173 948 137 INPUJ POWER Watts 56 105 61 109 So what does mean some things data tells us First both motor/gear drives require just about same input power turn same prop same speed small differences shown easily fall categories strumentation errors variation caused fact motors run different days shop air probably different temper ature humidity So Ive often said takes about same motor power input turn same prop same rpm almost no matter what motor proContinued page 139 NEW Fourmost Flush Button Hatch Release No Springs No Snaps No Rubber Bands Price $350 Flush Button allows modeler easy access hatch compart ment just finger tip Flush Button constructed lie completely flush surface hatch pro viding clean areodynamic finish Molded white device _________________________________ may painted match finish Fourmost Products 4040 24TH AVENUEFOREST GROVE OR 97116 perfectly prupuruoriu iu modeling Curtlss Robin5 049 Engines -Channel RIC 41 wingspan Electric Power Optional 622*6 K 003 Very few full scale ajrcatt ideally uuited model flight appealing old curtisu Robin born spruce linen age beautdully proportroned rubber electric glum engines Easy tan build trainerlike performance Flyfine Modef 0 Catalog 505Phone 703 273-0503 MODELS INC FLYLINE Box 2138 Fairfax VirginIa 22031 USA 503 357-2732 February 1988 47 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GWES FOUR FORMULAS 5-MIN 10 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOBSYPOXY DIVISION Pettt Pant Company fnQ 36 Pine Street Rociraway NJ 07866 *925 6975AVAILABLE AT AMERICAS*525 FINEST HOBBY SHOPS DISTRIBUTED BY WflHI ZND US 1*558 soo s cui s ad cudoro CA 03422 1 408-1717 Heat-Shrink/Murray Continued page 134 Thanks Art Kramer Henry Haffle Coverite Lawrence King Carl Goldberg Models Inc Mike Gretz Sig Manufacturing Inc Scott Chris tensen Top Flite samples new products and/or assistance re viewing information Thanks also Bob Huelsbeck Valley Aero Model ers provided samples extensive collection scraps About author Lee Murray Senior Research Associate large midwestern film converter Lee active RC Soaring computers References Ref 1 ASTM abbreviation Amer ican Society Testing Materials organization industry representatives de voted test standardization Ref 2 Packagings Encyclopedia 1987 Newton Massachusetts Cahners Publish ing Co 1987 Cahners Publishing Co Newton MA 02158-1630 Ref 3 ASTM D882 801 Tensile Proper ties Thin Plastic Sheeting Ref 4 ASTM D256 35 Impact Resis tance Plastics Electrical Insulating Materials Test Spencer Impact Ref 5 ASTM D1424 32 Tear Resis tance Woven Fabrics Falling Pendu lum Elmendori Apparatus Ref 6 WP Brennan Thermomechanical Analysis Polyethylene FilmThermal Analysis Application Study 23 Elmer Corp Instrument Div Norwalk CT 06856 Ref 7 GW Urbanczyk G Michalak Influence Annealing Ther mal Properties Polyethylene Terephtha late Fibers Heat Capacity Annealed PET Fibers Journal Applied Poly Sci 3 RC Electrics/Kopski Continued page 47 vided motor suitable given load Next data clearly shows modi fled motor requires less voltage cur rent turn prop given rpm means given number cells modified version will develop power said above does running higher rpmper-volt characteristic usually achieved reducing number turns armature pole OK So much mini motor lesson new Leisure catalog can yours sending stamped self-addressed business-size envelope Leisure 22971 Triton Way Unit B Laguna Hill CA 92653 just got new very colorful edition contains new addition Lei sure line kitsthe American Eaglet pretty Scale version 1931 classic lightplane looks like should very appealing growing number Electric modelers want fly Scale As write October 25 have seen kit advertising Perhaps will readily available time read Meanwhile can send catalog tell em Bob sent ya Caliphonce again Ive discussing plane off since July 87 column Over months Ive shared thoughts photos during time Ive accumulating very long flight log259 flights particular Ive accumulating flight expe rience large number power systems some listed October 87 issue Im now finally position offer complete list including geared-system examples So further delay heres table CALIPH DIRECT-DRIVE SYSTEMS MOTOR CELLSMABPROPS Keller 25/1212 8009 x 5 TEW 9 x 6 TEW 9 x 6 TN Astro 15 cobalt12 8005 x 4 TEW 8 x 4 TEN 8 x 4 TN 7 x 6 TEN 9508x5TEW 10 9508x6TEw 8 x 6 TEN 9 950Sx6TFN 12005x6TFN Astro 15 Super Femte12 800as w/cobalt 10 950as w/cobslt Continued page 140 SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALS COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & K&B PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC WE ALSO STOCK CARBON FIBER KLO1Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5W 7W LOOP RUBBER BANDS KSB SEELIG & IGMTION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES PARTS EVERYTHING YOU NEED FOR OLD TTAERINCLUDING REPLICA OR WICK ENGINES February 1988 139 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON VISA OR MASTERCARD OLD TIMER SUPPLIES Zu NA SAVVS famous line hobby aawa Razor #200 Universal #500 RO SOARING DIGEST A monthly publication covering International RC Soaring Scene S l6lyearin USA US S2OIyr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 4079 Payson AZ 85547 Replacement Blades available dealer ~1Su1y P0 Box 3857 Torrance CA 90610 ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING HANDLING FEE * 850 FOR INSURANCE ADD S 100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX GATOR RIC PRODUCTS 7 An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area-860 sq Complete Oelux Kit515995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjUstment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect espensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slipf phenolic sockets build wing structure Now size models 718dias2S 895 l/diax2S 995 ldiax3S1495 feather Ilte glass cloth 7 ozIsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve PullerS 795 Bearing PullerS 695 BothFot$1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure WAU aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instructions log book carrying caseS 795 NEWI WING MOUNTING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included $S95 HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes Mm wingspan L weight Basic Kit 300 sq InPre Built Kit Kyosho 360 ST* 7i200 6x4TFW CALIPH GEAR-DRIVE SYSTEMS MOTORCELLS MAR Astro 15 Cobalt Geared* 12800 Astro 05 Cobalt Geared Kyosho 360PT 15/38 ratio Kyosho 360ST 25 RPB** PROPS 11 x 75 Z 9x8K lOx 6 TFW 128009x4TFN 9 x 5 TFW 9 x 4 TN 9** 1200 9 s 7 TFW 7**12009x8K 91200 9x7TFW 8 x 5 TFW 71200 9x8TFW 712009x8K Notes flights electronic speed control TNTornado nylon TFNTop Flite nylon TFWTop Flise wood KKyosho ZZinger Comments conclusions First Caliphand general planes similar configuration size about 400 sq weight 48-50 ozwhile system described above will pull plane through air some rather badly some partic ularly serious drawbacks noted * reconsmended specific purpose Second some gear-drive combinations fly plane quite comfortably noted ** economy primary suggest Kyo sho 360 ST 251 RPB gears on7 x 12 AH cells 9 x 8 Kyosho propwith precau tion allowing prop hit ground Third best performers directdrive Astro Cobalt 15 Super Ferrite 15 either 10- 12-cell combinations Keller 25/12 combinations shown 12-cell combinations peppiest econ omy mandatory choose ferrite/ 10-cell se lection feel totally comfortable Finally about Caliph itself have aban doned use aileron-equipped wing because regular wing flies much betterbut dont know plane holds current KRC spin record 36 cash prize offered Electric Fly first break did An announcement about connector changes has just made Astro Future Astro prod ucts will come equipped popular Tamiya connectors popularized Electric cars used several other Electric flight systems including Leisure Goldberg Davey Great Planes Ky osho two-conductor connectors Fiberglass Fuselage molded wing Joiner tube Plug-In Wings rglass Belly Pan Optional Plastic Fiberglass Canopy Pro-Cut Holes Wing Joiner Tubes Ultrallght Honeycomb Wingcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9656 116ASt North Delta British Columbia V4C6Z4 Canada $12500 $32500 604-588-0605 quite bit bulky long-used Astro/Molex type See photo several con nectors December 1987 column Astro has included some Molex-to-Tamiya con version jumpers recent parts/price list reconimend replacing Molex connectors di rectly avoid increased wiring mess electri cal losses resulting wire connector interfaces Anyway change Astro now permits very easy replacement popular lower-cost ferrite motors cobalts wanting go way dont want fool around wiring happy ending has come story way ward Electric 87 KRC Electric Fly Saturday affair outcry dont have calling attention gracefislly circling climbing sport job way out hori zon Somehow model remained remark ably good trim radio guidance lost merely Free Righted long timegetting smaller smaller finally disappearing everyones sight CD Bruce Fenstermacher took off foot plane outpaced him carried breezy lift following week Bruce looked again foot air lightplane spotting largely green-colored model green trees tough task Bruce also ran add local paper no luck few weeks passed KRC President John Hickey noticed classified ad paper about found lost Electric seems young girl sported course John responded ad Identification/confirmation bit compli cated because weather obliterated identifying info model However follow ing some phone calls model properly identified belonging other AMA Executive Director John Worth Close ex amination model suggests possibly receiver battery fell out hatch opening leaving servos werewhich just situation needed fly just great itself add story model made its way back John hands Jay Gerber lives near area just happened heading down Virginia way latter name sounds familiarit should Jay man behind camera such all-time great film classics AMAs Diamonds Sky filmed part 85 KRC Electric Fly Please direct comment question SASE please address given start columnand please put ID on/in models permanent weatherproof way 140 Model Aviation TIGER TAIL 45 DELUX ALL BALSA KIT See Oealer Order Oirect Include $2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano acola FL 32514 4768639
Edition: Model Aviation - 1988/02
Page Numbers: 46, 47, 139, 140
MORE Leisure Amptique December 1987 column discussed model some detail offered some photos youre thinking about building plane may want review issue Some time has passed since written now five Aniptiques flying locally several made appearance 87 KRC Electric Fly seeing flying can now offer some further thoughts very fine model First accumulating experience reinforcing some t14 observations made previously includes fact kits provisions cool ing motor batteries have proven inade quate general motor battery routinely quite hot after flight local Amp tiques have outfitted additional airscoops enlarged air exits Also fuselage former front battery must opened up allow free air passage battery area youre sure about thermal condition motor battery following flight take wing off feel its hot let cool before charging again Another past point Some small-diameter gear drive output shafts simply holding up slightest prop contact ground Therefore may want seriously consider ex tending landing gear better prop clearanceas mentioned December issue Some recent discoveries lite ply former landing gear wire attached often failing Apparently some form ers bit weak adequately installed Local advice substitute 1A-in birch ply particular piece reinforce stallation some balsa front back former joins balsa fuselage sides five Amptiques Ive personally flown two have Leisure LT-50 systems two have Leisure Stock systems Ky osho system very nose-up attitude under power required Down elevator trim latter would removed power-off flight current recommendation eliminate reduce trimming annoyance install motor about 30 downthrust Finally Amptique very easy ROG grass enhancement regard steerable tail wheel five planes mentioned above have typical sim ple installation shown photos simple addition especially speedcontrolled motor can add significantly flying enjoyment Now please dont anyone misinterpret above Amptique has become per sonal number-one recommendation po tential Electric fliers ask about good first Electric kit nature above items merely represent several ways enhance models flyabiity durability wish Nothing should discourage build ing flying Leisure Amptique Leisure power systems bring share ques tions readers Most just want know difference between modified LT-50 stock armature modified motor wound given number battery cells same prop develops power flies shorter flights stock ver sion also costs have run geared versions 25 1 both bench have flown both Amptiques static bench experience agrees flight experience stock version does de velop much power Nevertheless ade quate Amptique cost limiting concern would suggest consider LT-50 instead espe cially intend use speed control gives flexibility having high power aggressive takeoffs ability back off power gentle climb cruise speed con trol used way allows essentially same motor run time both motor types course geared systems best applied 46 Model Aviation Radio Control Electrics Bob Kopski 25 se End Dr Lansdaie PA p446 Keith Shaw brought new Zlin 526 87 KRC Electric fly Plane spans 65 has 670 sq area weighs 75 lb Motivation Astro 60 direct drive 24 Sanyo 8CR cells Jomar SC4 controls rpm 11 x 8 Rev-Up fan super flier Somewhere photo Naomi Wilson hubby Johns Leisure Amptique made Its first flight KRC Electric Fly Power Kyosho 360 PT Transparent red MonoKote covering shows off planes strong light weight wing structure Steerable tail wheel installation L Leisure Amptique typical several flown Bobs locale makes easy ground steering grass Note large cooling-air exit-hole fuselage bottom Author Kopskis bizarre Ampeater design R just-for-fun profile Electric bipe flies absolutely great Power Astro cobalt 15 dozen 800 mAh cells Jomar SC-4 speed controller Almost everything stuck fuselage side double-sticky tape Airfoil Ritz section Plane weighs 48 oz Motor battery runs super-cool reference Jomars speed controllers Top-to-Bottom SC-5 SC-4 SC-3 SC-5 4-8 cells SC-4 best allaround unit SC-3 handles biggest systems includes optional electronic brake func tion supplied No 12 high-flex wire low-loss Sermos Snap connectors relatively larger slower models exemplified Old-Timers Amptique etc have no recent experience using motors direct-drive applications cant comment firsthand knowledge Perhaps will change future contrary geared systems above direct-dxiye systems best ap plied relatively smaller faster models such Wasp Now some bench performance informa tion two geared Leisures using Top Flite 10 x 6 wood prop data format needs some explanation bench-running motor typi cally choose between two parameter options de pending what Im trying accomplish option vary applied voltage variable high-power power supply simulate changing number cells one record resulting current rpm numbers step other option set desired rpm ad justing voltage needed recording voltage current Choosing option allows compare input power various motors voltage times current under same load prop rpm conditions happens method used data below MOTOR Modified Stock RPM 5000 6000 5000 6000 VOLTS 473 609 639 794 AMPS 1185 173 948 137 INPUJ POWER Watts 56 105 61 109 So what does mean some things data tells us First both motor/gear drives require just about same input power turn same prop same speed small differences shown easily fall categories strumentation errors variation caused fact motors run different days shop air probably different temper ature humidity So Ive often said takes about same motor power input turn same prop same rpm almost no matter what motor proContinued page 139 NEW Fourmost Flush Button Hatch Release No Springs No Snaps No Rubber Bands Price $350 Flush Button allows modeler easy access hatch compart ment just finger tip Flush Button constructed lie completely flush surface hatch pro viding clean areodynamic finish Molded white device _________________________________ may painted match finish Fourmost Products 4040 24TH AVENUEFOREST GROVE OR 97116 perfectly prupuruoriu iu modeling Curtlss Robin5 049 Engines -Channel RIC 41 wingspan Electric Power Optional 622*6 K 003 Very few full scale ajrcatt ideally uuited model flight appealing old curtisu Robin born spruce linen age beautdully proportroned rubber electric glum engines Easy tan build trainerlike performance Flyfine Modef 0 Catalog 505Phone 703 273-0503 MODELS INC FLYLINE Box 2138 Fairfax VirginIa 22031 USA 503 357-2732 February 1988 47 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GWES FOUR FORMULAS 5-MIN 10 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOBSYPOXY DIVISION Pettt Pant Company fnQ 36 Pine Street Rociraway NJ 07866 *925 6975AVAILABLE AT AMERICAS*525 FINEST HOBBY SHOPS DISTRIBUTED BY WflHI ZND US 1*558 soo s cui s ad cudoro CA 03422 1 408-1717 Heat-Shrink/Murray Continued page 134 Thanks Art Kramer Henry Haffle Coverite Lawrence King Carl Goldberg Models Inc Mike Gretz Sig Manufacturing Inc Scott Chris tensen Top Flite samples new products and/or assistance re viewing information Thanks also Bob Huelsbeck Valley Aero Model ers provided samples extensive collection scraps About author Lee Murray Senior Research Associate large midwestern film converter Lee active RC Soaring computers References Ref 1 ASTM abbreviation Amer ican Society Testing Materials organization industry representatives de voted test standardization Ref 2 Packagings Encyclopedia 1987 Newton Massachusetts Cahners Publish ing Co 1987 Cahners Publishing Co Newton MA 02158-1630 Ref 3 ASTM D882 801 Tensile Proper ties Thin Plastic Sheeting Ref 4 ASTM D256 35 Impact Resis tance Plastics Electrical Insulating Materials Test Spencer Impact Ref 5 ASTM D1424 32 Tear Resis tance Woven Fabrics Falling Pendu lum Elmendori Apparatus Ref 6 WP Brennan Thermomechanical Analysis Polyethylene FilmThermal Analysis Application Study 23 Elmer Corp Instrument Div Norwalk CT 06856 Ref 7 GW Urbanczyk G Michalak Influence Annealing Ther mal Properties Polyethylene Terephtha late Fibers Heat Capacity Annealed PET Fibers Journal Applied Poly Sci 3 RC Electrics/Kopski Continued page 47 vided motor suitable given load Next data clearly shows modi fled motor requires less voltage cur rent turn prop given rpm means given number cells modified version will develop power said above does running higher rpmper-volt characteristic usually achieved reducing number turns armature pole OK So much mini motor lesson new Leisure catalog can yours sending stamped self-addressed business-size envelope Leisure 22971 Triton Way Unit B Laguna Hill CA 92653 just got new very colorful edition contains new addition Lei sure line kitsthe American Eaglet pretty Scale version 1931 classic lightplane looks like should very appealing growing number Electric modelers want fly Scale As write October 25 have seen kit advertising Perhaps will readily available time read Meanwhile can send catalog tell em Bob sent ya Caliphonce again Ive discussing plane off since July 87 column Over months Ive shared thoughts photos during time Ive accumulating very long flight log259 flights particular Ive accumulating flight expe rience large number power systems some listed October 87 issue Im now finally position offer complete list including geared-system examples So further delay heres table CALIPH DIRECT-DRIVE SYSTEMS MOTOR CELLSMABPROPS Keller 25/1212 8009 x 5 TEW 9 x 6 TEW 9 x 6 TN Astro 15 cobalt12 8005 x 4 TEW 8 x 4 TEN 8 x 4 TN 7 x 6 TEN 9508x5TEW 10 9508x6TEw 8 x 6 TEN 9 950Sx6TFN 12005x6TFN Astro 15 Super Femte12 800as w/cobalt 10 950as w/cobslt Continued page 140 SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALS COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & K&B PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC WE ALSO STOCK CARBON FIBER KLO1Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5W 7W LOOP RUBBER BANDS KSB SEELIG & IGMTION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES PARTS EVERYTHING YOU NEED FOR OLD TTAERINCLUDING REPLICA OR WICK ENGINES February 1988 139 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON VISA OR MASTERCARD OLD TIMER SUPPLIES Zu NA SAVVS famous line hobby aawa Razor #200 Universal #500 RO SOARING DIGEST A monthly publication covering International RC Soaring Scene S l6lyearin USA US S2OIyr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 4079 Payson AZ 85547 Replacement Blades available dealer ~1Su1y P0 Box 3857 Torrance CA 90610 ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING HANDLING FEE * 850 FOR INSURANCE ADD S 100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX GATOR RIC PRODUCTS 7 An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area-860 sq Complete Oelux Kit515995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjUstment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect espensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slipf phenolic sockets build wing structure Now size models 718dias2S 895 l/diax2S 995 ldiax3S1495 feather Ilte glass cloth 7 ozIsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve PullerS 795 Bearing PullerS 695 BothFot$1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure WAU aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instructions log book carrying caseS 795 NEWI WING MOUNTING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included $S95 HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes Mm wingspan L weight Basic Kit 300 sq InPre Built Kit Kyosho 360 ST* 7i200 6x4TFW CALIPH GEAR-DRIVE SYSTEMS MOTORCELLS MAR Astro 15 Cobalt Geared* 12800 Astro 05 Cobalt Geared Kyosho 360PT 15/38 ratio Kyosho 360ST 25 RPB** PROPS 11 x 75 Z 9x8K lOx 6 TFW 128009x4TFN 9 x 5 TFW 9 x 4 TN 9** 1200 9 s 7 TFW 7**12009x8K 91200 9x7TFW 8 x 5 TFW 71200 9x8TFW 712009x8K Notes flights electronic speed control TNTornado nylon TFNTop Flite nylon TFWTop Flise wood KKyosho ZZinger Comments conclusions First Caliphand general planes similar configuration size about 400 sq weight 48-50 ozwhile system described above will pull plane through air some rather badly some partic ularly serious drawbacks noted * reconsmended specific purpose Second some gear-drive combinations fly plane quite comfortably noted ** economy primary suggest Kyo sho 360 ST 251 RPB gears on7 x 12 AH cells 9 x 8 Kyosho propwith precau tion allowing prop hit ground Third best performers directdrive Astro Cobalt 15 Super Ferrite 15 either 10- 12-cell combinations Keller 25/12 combinations shown 12-cell combinations peppiest econ omy mandatory choose ferrite/ 10-cell se lection feel totally comfortable Finally about Caliph itself have aban doned use aileron-equipped wing because regular wing flies much betterbut dont know plane holds current KRC spin record 36 cash prize offered Electric Fly first break did An announcement about connector changes has just made Astro Future Astro prod ucts will come equipped popular Tamiya connectors popularized Electric cars used several other Electric flight systems including Leisure Goldberg Davey Great Planes Ky osho two-conductor connectors Fiberglass Fuselage molded wing Joiner tube Plug-In Wings rglass Belly Pan Optional Plastic Fiberglass Canopy Pro-Cut Holes Wing Joiner Tubes Ultrallght Honeycomb Wingcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9656 116ASt North Delta British Columbia V4C6Z4 Canada $12500 $32500 604-588-0605 quite bit bulky long-used Astro/Molex type See photo several con nectors December 1987 column Astro has included some Molex-to-Tamiya con version jumpers recent parts/price list reconimend replacing Molex connectors di rectly avoid increased wiring mess electri cal losses resulting wire connector interfaces Anyway change Astro now permits very easy replacement popular lower-cost ferrite motors cobalts wanting go way dont want fool around wiring happy ending has come story way ward Electric 87 KRC Electric Fly Saturday affair outcry dont have calling attention gracefislly circling climbing sport job way out hori zon Somehow model remained remark ably good trim radio guidance lost merely Free Righted long timegetting smaller smaller finally disappearing everyones sight CD Bruce Fenstermacher took off foot plane outpaced him carried breezy lift following week Bruce looked again foot air lightplane spotting largely green-colored model green trees tough task Bruce also ran add local paper no luck few weeks passed KRC President John Hickey noticed classified ad paper about found lost Electric seems young girl sported course John responded ad Identification/confirmation bit compli cated because weather obliterated identifying info model However follow ing some phone calls model properly identified belonging other AMA Executive Director John Worth Close ex amination model suggests possibly receiver battery fell out hatch opening leaving servos werewhich just situation needed fly just great itself add story model made its way back John hands Jay Gerber lives near area just happened heading down Virginia way latter name sounds familiarit should Jay man behind camera such all-time great film classics AMAs Diamonds Sky filmed part 85 KRC Electric Fly Please direct comment question SASE please address given start columnand please put ID on/in models permanent weatherproof way 140 Model Aviation TIGER TAIL 45 DELUX ALL BALSA KIT See Oealer Order Oirect Include $2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano acola FL 32514 4768639
Edition: Model Aviation - 1988/02
Page Numbers: 46, 47, 139, 140
MORE Leisure Amptique December 1987 column discussed model some detail offered some photos youre thinking about building plane may want review issue Some time has passed since written now five Aniptiques flying locally several made appearance 87 KRC Electric Fly seeing flying can now offer some further thoughts very fine model First accumulating experience reinforcing some t14 observations made previously includes fact kits provisions cool ing motor batteries have proven inade quate general motor battery routinely quite hot after flight local Amp tiques have outfitted additional airscoops enlarged air exits Also fuselage former front battery must opened up allow free air passage battery area youre sure about thermal condition motor battery following flight take wing off feel its hot let cool before charging again Another past point Some small-diameter gear drive output shafts simply holding up slightest prop contact ground Therefore may want seriously consider ex tending landing gear better prop clearanceas mentioned December issue Some recent discoveries lite ply former landing gear wire attached often failing Apparently some form ers bit weak adequately installed Local advice substitute 1A-in birch ply particular piece reinforce stallation some balsa front back former joins balsa fuselage sides five Amptiques Ive personally flown two have Leisure LT-50 systems two have Leisure Stock systems Ky osho system very nose-up attitude under power required Down elevator trim latter would removed power-off flight current recommendation eliminate reduce trimming annoyance install motor about 30 downthrust Finally Amptique very easy ROG grass enhancement regard steerable tail wheel five planes mentioned above have typical sim ple installation shown photos simple addition especially speedcontrolled motor can add significantly flying enjoyment Now please dont anyone misinterpret above Amptique has become per sonal number-one recommendation po tential Electric fliers ask about good first Electric kit nature above items merely represent several ways enhance models flyabiity durability wish Nothing should discourage build ing flying Leisure Amptique Leisure power systems bring share ques tions readers Most just want know difference between modified LT-50 stock armature modified motor wound given number battery cells same prop develops power flies shorter flights stock ver sion also costs have run geared versions 25 1 both bench have flown both Amptiques static bench experience agrees flight experience stock version does de velop much power Nevertheless ade quate Amptique cost limiting concern would suggest consider LT-50 instead espe cially intend use speed control gives flexibility having high power aggressive takeoffs ability back off power gentle climb cruise speed con trol used way allows essentially same motor run time both motor types course geared systems best applied 46 Model Aviation Radio Control Electrics Bob Kopski 25 se End Dr Lansdaie PA p446 Keith Shaw brought new Zlin 526 87 KRC Electric fly Plane spans 65 has 670 sq area weighs 75 lb Motivation Astro 60 direct drive 24 Sanyo 8CR cells Jomar SC4 controls rpm 11 x 8 Rev-Up fan super flier Somewhere photo Naomi Wilson hubby Johns Leisure Amptique made Its first flight KRC Electric Fly Power Kyosho 360 PT Transparent red MonoKote covering shows off planes strong light weight wing structure Steerable tail wheel installation L Leisure Amptique typical several flown Bobs locale makes easy ground steering grass Note large cooling-air exit-hole fuselage bottom Author Kopskis bizarre Ampeater design R just-for-fun profile Electric bipe flies absolutely great Power Astro cobalt 15 dozen 800 mAh cells Jomar SC-4 speed controller Almost everything stuck fuselage side double-sticky tape Airfoil Ritz section Plane weighs 48 oz Motor battery runs super-cool reference Jomars speed controllers Top-to-Bottom SC-5 SC-4 SC-3 SC-5 4-8 cells SC-4 best allaround unit SC-3 handles biggest systems includes optional electronic brake func tion supplied No 12 high-flex wire low-loss Sermos Snap connectors relatively larger slower models exemplified Old-Timers Amptique etc have no recent experience using motors direct-drive applications cant comment firsthand knowledge Perhaps will change future contrary geared systems above direct-dxiye systems best ap plied relatively smaller faster models such Wasp Now some bench performance informa tion two geared Leisures using Top Flite 10 x 6 wood prop data format needs some explanation bench-running motor typi cally choose between two parameter options de pending what Im trying accomplish option vary applied voltage variable high-power power supply simulate changing number cells one record resulting current rpm numbers step other option set desired rpm ad justing voltage needed recording voltage current Choosing option allows compare input power various motors voltage times current under same load prop rpm conditions happens method used data below MOTOR Modified Stock RPM 5000 6000 5000 6000 VOLTS 473 609 639 794 AMPS 1185 173 948 137 INPUJ POWER Watts 56 105 61 109 So what does mean some things data tells us First both motor/gear drives require just about same input power turn same prop same speed small differences shown easily fall categories strumentation errors variation caused fact motors run different days shop air probably different temper ature humidity So Ive often said takes about same motor power input turn same prop same rpm almost no matter what motor proContinued page 139 NEW Fourmost Flush Button Hatch Release No Springs No Snaps No Rubber Bands Price $350 Flush Button allows modeler easy access hatch compart ment just finger tip Flush Button constructed lie completely flush surface hatch pro viding clean areodynamic finish Molded white device _________________________________ may painted match finish Fourmost Products 4040 24TH AVENUEFOREST GROVE OR 97116 perfectly prupuruoriu iu modeling Curtlss Robin5 049 Engines -Channel RIC 41 wingspan Electric Power Optional 622*6 K 003 Very few full scale ajrcatt ideally uuited model flight appealing old curtisu Robin born spruce linen age beautdully proportroned rubber electric glum engines Easy tan build trainerlike performance Flyfine Modef 0 Catalog 505Phone 703 273-0503 MODELS INC FLYLINE Box 2138 Fairfax VirginIa 22031 USA 503 357-2732 February 1988 47 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GWES FOUR FORMULAS 5-MIN 10 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE HOBSYPOXY DIVISION Pettt Pant Company fnQ 36 Pine Street Rociraway NJ 07866 *925 6975AVAILABLE AT AMERICAS*525 FINEST HOBBY SHOPS DISTRIBUTED BY WflHI ZND US 1*558 soo s cui s ad cudoro CA 03422 1 408-1717 Heat-Shrink/Murray Continued page 134 Thanks Art Kramer Henry Haffle Coverite Lawrence King Carl Goldberg Models Inc Mike Gretz Sig Manufacturing Inc Scott Chris tensen Top Flite samples new products and/or assistance re viewing information Thanks also Bob Huelsbeck Valley Aero Model ers provided samples extensive collection scraps About author Lee Murray Senior Research Associate large midwestern film converter Lee active RC Soaring computers References Ref 1 ASTM abbreviation Amer ican Society Testing Materials organization industry representatives de voted test standardization Ref 2 Packagings Encyclopedia 1987 Newton Massachusetts Cahners Publish ing Co 1987 Cahners Publishing Co Newton MA 02158-1630 Ref 3 ASTM D882 801 Tensile Proper ties Thin Plastic Sheeting Ref 4 ASTM D256 35 Impact Resis tance Plastics Electrical Insulating Materials Test Spencer Impact Ref 5 ASTM D1424 32 Tear Resis tance Woven Fabrics Falling Pendu lum Elmendori Apparatus Ref 6 WP Brennan Thermomechanical Analysis Polyethylene FilmThermal Analysis Application Study 23 Elmer Corp Instrument Div Norwalk CT 06856 Ref 7 GW Urbanczyk G Michalak Influence Annealing Ther mal Properties Polyethylene Terephtha late Fibers Heat Capacity Annealed PET Fibers Journal Applied Poly Sci 3 RC Electrics/Kopski Continued page 47 vided motor suitable given load Next data clearly shows modi fled motor requires less voltage cur rent turn prop given rpm means given number cells modified version will develop power said above does running higher rpmper-volt characteristic usually achieved reducing number turns armature pole OK So much mini motor lesson new Leisure catalog can yours sending stamped self-addressed business-size envelope Leisure 22971 Triton Way Unit B Laguna Hill CA 92653 just got new very colorful edition contains new addition Lei sure line kitsthe American Eaglet pretty Scale version 1931 classic lightplane looks like should very appealing growing number Electric modelers want fly Scale As write October 25 have seen kit advertising Perhaps will readily available time read Meanwhile can send catalog tell em Bob sent ya Caliphonce again Ive discussing plane off since July 87 column Over months Ive shared thoughts photos during time Ive accumulating very long flight log259 flights particular Ive accumulating flight expe rience large number power systems some listed October 87 issue Im now finally position offer complete list including geared-system examples So further delay heres table CALIPH DIRECT-DRIVE SYSTEMS MOTOR CELLSMABPROPS Keller 25/1212 8009 x 5 TEW 9 x 6 TEW 9 x 6 TN Astro 15 cobalt12 8005 x 4 TEW 8 x 4 TEN 8 x 4 TN 7 x 6 TEN 9508x5TEW 10 9508x6TEw 8 x 6 TEN 9 950Sx6TFN 12005x6TFN Astro 15 Super Femte12 800as w/cobalt 10 950as w/cobslt Continued page 140 SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S & 09S ALL CUSTOM & STOCK PARTS VAILABLE INDIVIDUALLY MANY NEW PARTS FOR OLD DISCONTINUED COX ENGINES COX PROPS & GLOW HEADS COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES ALS COMPLETE LINE OF RACING PARTS -- GLO-BEE FIREBALL & K&B PLUGS SOLID LINES RACING WHEELS QUICK FILLS ETC WE ALSO STOCK CARBON FIBER KLO1Z OIL LATEX & SILICONE FUEL TUBING PEN BLADDER MATERIALS & HARDTO-FIND HARDWARE ESPECIALLY 2-56 3-48 SIZES COILS CONDENSERS NGK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5W 7W LOOP RUBBER BANDS KSB SEELIG & IGMTION TIMERS GAS & DIESEL FUEL TUBING TRANSISTOR IGNON SYSTEMS RESISTOR HI-TENSION LEADS 1/2A TEXACO PLAYBOY SR KIT 1/2A TEXACO ENGINES PARTS EVERYTHING YOU NEED FOR OLD TTAERINCLUDING REPLICA OR WICK ENGINES February 1988 139 WE STOCK ALL REV-UP PROPS OUR INVENTORY AVERAGES OVER 10000 PROPS! CALL FOR IMMEDIATE SHIPMENT ON VISA OR MASTERCARD OLD TIMER SUPPLIES Zu NA SAVVS famous line hobby aawa Razor #200 Universal #500 RO SOARING DIGEST A monthly publication covering International RC Soaring Scene S l6lyearin USA US S2OIyr Canada& Mexico US $24/yr elsewhere via airmail RCSD PO Box 4079 Payson AZ 85547 Replacement Blades available dealer ~1Su1y P0 Box 3857 Torrance CA 90610 ORDER BY MAIL OR PHONE 714 830-5162 SORRY NO CODJ VISA & MASTERCARD WELCOME DEALER INQUIRIES INVITED MINIMUM MERCHANDISE ORDER *1000 SHIPPING HANDLING FEE * 850 FOR INSURANCE ADD S 100 ORDERS SHIPPED WITHIN 24 HOURS CALIF RESIDENTS ADD 6% TAX GATOR RIC PRODUCTS 7 An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area-860 sq Complete Oelux Kit515995 PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters included provide micro screw adjUstment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect espensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp $1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slipf phenolic sockets build wing structure Now size models 718dias2S 895 l/diax2S 995 ldiax3S1495 feather Ilte glass cloth 7 ozIsq yd est weave Fastest Filling est Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull tight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve PullerS 795 Bearing PullerS 695 BothFot$1395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure WAU aileron elevator rudder throw Takes guess work out trimming out airplane quality tool complete instructions log book carrying caseS 795 NEWI WING MOUNTING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included $S95 HIGH PERFORMANCE MODELS ECL IPSE presents Designed Henry Piorun Former Canadian National Champion & FAI Canadian Team Member Designed Specifically FAI Pattern Flying Perform Equally Well Other AMA Classes Mm wingspan L weight Basic Kit 300 sq InPre Built Kit Kyosho 360 ST* 7i200 6x4TFW CALIPH GEAR-DRIVE SYSTEMS MOTORCELLS MAR Astro 15 Cobalt Geared* 12800 Astro 05 Cobalt Geared Kyosho 360PT 15/38 ratio Kyosho 360ST 25 RPB** PROPS 11 x 75 Z 9x8K lOx 6 TFW 128009x4TFN 9 x 5 TFW 9 x 4 TN 9** 1200 9 s 7 TFW 7**12009x8K 91200 9x7TFW 8 x 5 TFW 71200 9x8TFW 712009x8K Notes flights electronic speed control TNTornado nylon TFNTop Flite nylon TFWTop Flise wood KKyosho ZZinger Comments conclusions First Caliphand general planes similar configuration size about 400 sq weight 48-50 ozwhile system described above will pull plane through air some rather badly some partic ularly serious drawbacks noted * reconsmended specific purpose Second some gear-drive combinations fly plane quite comfortably noted ** economy primary suggest Kyo sho 360 ST 251 RPB gears on7 x 12 AH cells 9 x 8 Kyosho propwith precau tion allowing prop hit ground Third best performers directdrive Astro Cobalt 15 Super Ferrite 15 either 10- 12-cell combinations Keller 25/12 combinations shown 12-cell combinations peppiest econ omy mandatory choose ferrite/ 10-cell se lection feel totally comfortable Finally about Caliph itself have aban doned use aileron-equipped wing because regular wing flies much betterbut dont know plane holds current KRC spin record 36 cash prize offered Electric Fly first break did An announcement about connector changes has just made Astro Future Astro prod ucts will come equipped popular Tamiya connectors popularized Electric cars used several other Electric flight systems including Leisure Goldberg Davey Great Planes Ky osho two-conductor connectors Fiberglass Fuselage molded wing Joiner tube Plug-In Wings rglass Belly Pan Optional Plastic Fiberglass Canopy Pro-Cut Holes Wing Joiner Tubes Ultrallght Honeycomb Wingcors extra $35 Send check money order HIGH PERFORMANCE MODELS 9656 116ASt North Delta British Columbia V4C6Z4 Canada $12500 $32500 604-588-0605 quite bit bulky long-used Astro/Molex type See photo several con nectors December 1987 column Astro has included some Molex-to-Tamiya con version jumpers recent parts/price list reconimend replacing Molex connectors di rectly avoid increased wiring mess electri cal losses resulting wire connector interfaces Anyway change Astro now permits very easy replacement popular lower-cost ferrite motors cobalts wanting go way dont want fool around wiring happy ending has come story way ward Electric 87 KRC Electric Fly Saturday affair outcry dont have calling attention gracefislly circling climbing sport job way out hori zon Somehow model remained remark ably good trim radio guidance lost merely Free Righted long timegetting smaller smaller finally disappearing everyones sight CD Bruce Fenstermacher took off foot plane outpaced him carried breezy lift following week Bruce looked again foot air lightplane spotting largely green-colored model green trees tough task Bruce also ran add local paper no luck few weeks passed KRC President John Hickey noticed classified ad paper about found lost Electric seems young girl sported course John responded ad Identification/confirmation bit compli cated because weather obliterated identifying info model However follow ing some phone calls model properly identified belonging other AMA Executive Director John Worth Close ex amination model suggests possibly receiver battery fell out hatch opening leaving servos werewhich just situation needed fly just great itself add story model made its way back John hands Jay Gerber lives near area just happened heading down Virginia way latter name sounds familiarit should Jay man behind camera such all-time great film classics AMAs Diamonds Sky filmed part 85 KRC Electric Fly Please direct comment question SASE please address given start columnand please put ID on/in models permanent weatherproof way 140 Model Aviation TIGER TAIL 45 DELUX ALL BALSA KIT See Oealer Order Oirect Include $2 Per item UPS GATOR RIC PRODUCTS 3713 Pompano acola FL 32514 4768639