It Really Works!

THROUGHOUT THE YEARS dynamic field model aviation changes have brought about significant progress Model airplanes have evolved very early stick-and-tissue rubber-powered craft todays sophisticated foam-andglass multi-engined ships simultan eous proportional trimmable control step along way someone have courage different daring try something new Too often though attempts imple can muster courage things little differ ently next guy have persistence keep no matter what too can join ranks innovators add much world aviation EBill Evans ment change met resistance slows advancements often have come up new idea place work home met nonacceptance listener closes mind idea has unbudging titude wont work tried before good would have already done Translation Someone greater would have already have done Yet culture thrives new different New ideas products appear day advertising has power change peoples minds about old make room new prime example toy manufacturers TV ads fire chil dren drive get Santa deliver goods way young accepting change Perhaps its because older folks tend remember past certain secure future other hand unknownnot certain certainly secure As know past 15 years 50-year modeling career have spent dealing changein form flying wing could have stuck conventional accepted aircraft chose try new fork road designed Simitar series numbers 20 different configurations flying wings Unfortunately much reaction get Simitar negative Comments like Flying wings unstable inefficient Couldnt afford stab typicaland also typify all-tooprevalent attitudes perceptions beliefs related change Ask demurrers 42 Model Aviation Top Bill says designed thetailless Cap-21 notto suggestthat scale aircraft should tailless produce ship will tip stall process prove concept tailless aircraft Above Astron Xwlng proved have magic its predecessors have ever built flying wing answer no So have no common factual knowledge upon base further discussion Such attitude kind smacks guy doesnt like Chevies has never owned Another reaction hear flying wings practical would use today Interesting SR-7 1 flies three times speed sound flying wing Concorde worlds fastest transport flying wing space shuttle certainly has distance record flying wing Its remarkable attitude perception belief can take precedence over fact form mental pictures what true Ive often asked dont fly conventional aircraft People remark surely could build fly craft choice other Simitar assume favor latter because designed wrong choose Simitar because its special attributes make superior conventional aircraft judgment based years experience experience has carried right through history model aviation first Comet kit Thirties right through Free Flight Control Line early Radio Forties middle Radio Fifties up present have built flown many conventional air craft So choice based past experience conventional versus 15 years experience some not-soconventional wing designs actual per formance flying wing has simply proven itself superior attributes flying wing make better Hawaiians put begin its stability Simitar stable will stall Hard believe true conventional aircraft angle attack wing increased power decreased eventually tail falls wing rolls toward ground ship tip-stalls falls ground Simitar other hand flying wing provides built-in correction sequence events flying wing angle attack increased power de creased initial tendency leading edge wing stall start fall automatically reduces angle attack Result wing never stalls just drops its nose keeps flying Nice huh Can imagine pilots would alive today flying ships wouldnt stall Because its inherent stability Simi tar will virtually stay mode put Give up command stick let off wrn continue climb Give right roll command let off will complete series 3600 turns ship stays hands-off mode wish Simitars response control com mand almost instantaneous depending upon amount stick pressure applied ships swift responsiveness combined its anti-stall characteristic make easy save get trouble Bill Winter very interesting comment about Simitar Desperado recent trip west coast met flew K&B 21-powered Desperado week later called said thinking about flight experience hed come wonder Desperado onboard computer linked mind Hed ex perienced feeling ship executed control commands instant hed thought almost before thought Hed felt though ship extension himself air Another advantage Simitars wide range speed Like fly slow will Like October 1987 43 Desperadoes spite having anhedral 40 60 25cc versions have Inherent stability Bill says best flying Simitar configurations Certainly fast enough anybodys model air force Simitar 540s highperformance pumper-equipped K&B 75 engines have clocked over 185 mph baddest Simitars though version nicknamed Trouble because its speed performance Its onlyforTop Gun pllotswith lots nerve iightning reflexes fly fast Thats okay too 15 mph up 150 mph well within aircrafts range operation makes flying especially windy conditions 30 mph plus cinch No fallout downwind turns Added adaptability Siniltar design lends itself seem ingly endless configurations Anything ap pears possible within design parameters flying wing Gliders gas-powered twin-engined elec tric-powered X-wings V-tail T-tail hedral Simitars Simitars taking 020 engines Simitars designed use 25cc engines theres Scale tailless CAP 21all permutations basic Simitar design flying wing makes outstanding trainer fact isnt widely known yet Can imagine disbelief shock part some Masters have definite preconception what trainer craft should see new flier being trained flying wing Once hes assimilated information imagine Master must react notices quickly kid becomes super pilot capable maneuvers heretofore re served years prac tice think ruffles composure little youre right Such reaction hu man deviations standard practice threat assurances provided past experience though sometimes want cleave tried-and-true model aviation has never stranger change Balsa sticks tissue dope gave way foam ply heat-shrink covering produce almost indestructible easily repairable wing Rubberband power made way ignition engines ignition replaced glow electric power result has increased duration power put aloft planes almostunbelievable size Ambroid uses has yielded cyanoacrylate CyA epoxy glues speeding bonding point can scarcely get fingers out way time affording strength fasten music wire ply fantastic array features available todays radios dizzies imagination open rear Continued na2e 140 44 Model Aviation Double X-Wlng Frank Johnson Flight performance unreal Franka adaptation X-Wing configuration though engines spaced incredible 40 apart An eariier version mis nying wing gilaer ins aracen ii provea have wide speed range demonstrated configurations unique stall-proof characteristics Another variants 049-powered twin ease performance becomes ap parent find completely flyable using either engines Simitar XVwas first powered Simitars Up its time such performance model never experienced maiden voyage made 25mph winds Maneuver #5The Traffic Pattern Try pick time have field yourself Demonstrate low rectangular traffic pattern pointing out turning point references house tree big rock etc Point out way horizon changes Comment horizon changes can trick thinking climbing descending fact flying dead level sun bright tell student Look shadow usually becomes notice able plane about three four feet above ground tell student Lift nose slightly just before wheels touch shadow Demonstrate properly flared landing Have student fly higher pattern teach him trim airplane level flight half-throttle downwind cut back throttle base leg watch positive rate sink cut back idle final concentrate keeping wings level As plane passes have student add power go around again Have student make several circuits traffic pattern Maneuver #6Takeoffs confident student can keep wings level land airplane Put student behind airplane first few takeoffs Give him aiming point far end runway tree chimney etc emphasize Steer left hand Im assuming common Mode II control format throttle/rudder left stick As know airplane can trimdied automatic takeoffs pilot will succeed long he/she doesnt interfere too much Practice student making takeoffs instructor making landings Maneuver #7Landings After fifth take off guide student through landing keep him making takeoffs landings prefer teach landings coming toward pilot because pilot can see both airplane runway have emphasize pilot must see top airplane expects have land front him also good idea point out pilot keeps looking head-on view airplane will hit him head Before airplane lands pilot must see some side view mind important thing have teach about landings what look correct heading sink rate wings level top view side view shadow flare raise nose slightly touchdown agree speed also important plane going too fast will simply bounce back air few times have teach student keep flying plane until stationary ground engine stopped Along about third landing student will have left/right trouble Depend will have alert save plane third training sessionReview Seven Previous Maneuvers will take awhile student needs practice Maneuver #SStalls Spins Recoveries Demonstrate stall put plane spin spiral dive Go through recovery procedure Throttle Back Stick Centered Gentle Pullout Add Power Put plane spin Have student make half-dozen spin recoveries Make sure spin plane both directions Throw power dive two now know knows what open question Will Three sessions solo Does mean student crash-proof No way ready send plane sky filled five six other planes dashing hither yon likely keeps wits about him should able get plane up back down again damage himself others Hell want lot coaching experience before ready fly Masters Pattern As FAA examiner told signed off pilots license Now go learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Works/Evans Continued page 44 cover Futaba PCM marvel creative mind made instrument practical reality Truly 21st century stuff Like flying wing design tech nologies anticipate future Maybe keeping mind cant hold progress back next time youre field see Gordy Stahl Paul Samaras Mike Tyler Bill Thompson Keith Brauti E 5 ELECTRIC MOTOR MOUNT JT Eli *896 0610075 Motors JT-EL2 *1396 2640 Motors 0360615 cobalta Includes motor hold down strap screws Postage & Handling *250 spplsd br o esa em o m pouoesatrmteaa mountngtO moo pop etno moo s Mount tows nocttang nq moto oes gn pertO ma Motor can mounted ttrougtr met maonna rewa propo CO coc op FREE CATALOG IS ii TMa1 1pUPI MOTN7A~74 b 140 VEABLE CONTROLS fgpIag ACe EASY ADJUSTMENT 24 WIfiA#KIT ONLY $895 1337 e Lw - - PECK UMELI REALLY DO flVi MANY HARD TO FIND ITEMS FOR RUaBER MODELS 35 Peck-Pe4aers-7 -- tDPSETECJTdLU$2U Box 2498 -MA LA MESA CA 92044 QUAY BARBER MODELS V1x4 SHOESTRINGSIRS fl SEMIKiT $11995 KIT515495 Paick Riveas SF211KIT $11995 KIT$15495 wEPOXY/CLASS/FOAM/BALSA CONSTRUCTION WITH DRAWINGS AND DATA FOR FORMULA 120 PYLON SPORT OR STANDOFF SCALE FULL OR SEMIKITSCommic 8 10 lbs wtnightWind 790 sq wing area SEMIKIT $10995 60 2 stroke 12 4 stroke KIT $14495 skit prices plus shipping ecredit cards welcome Ohio residents add 6* 1 216 777-6172 27106 9utternut RidgeNoflh Olmated Ohio 44070 140 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway Sari Dimas CA 91773 Arc welded seams Durable lightweight construction Frequency filter Pressure nipple Side mount screws Grooved flange positive grip Stacks different lengths Breakaway straps prevent engine damage case crash Silencers d Pipes Manifolds Complete line high quality exhaust systems Super silent tuned pipeseasily adjustable combining top performance effective noise reduction Manifoldslarge variety difficult installations Tuned exhaust systemsunbelievable selection different gas car systems available Versatile compact silencers easy installation Lightweight durable plus much morel See local dealer STM catalog high performance exhaust systems ULi/M UNITED MODEL PRODUCTSA division united Model Distributors 301 Holbrook Dr Wheeling IL 60090 gaIn Robert E Byrd John Cole Steve Hosner Bill Winter others have bitten infective sting Simitar will bit understanding Maybe youll offer encouragement better yet ask let have turn stick flies just like other aircraft better real issue understand flying wing itself what stands Its changes being offered out flying field Most changes improvements advance sport Too often model aviation life change rejected because attitude hearsay has no basis fact People forget change fulcrum progress Its rewarding find out facts yourself trying something own keep open mind about change both innovations see around today well yet come Join flying 21st century RC Electrics/Kopski Continued page 47 appropriate plane feel guess what Ted himself has acquiesced popular mispronunciation says Kay-hf So take pick Now thats settled lets get some serious aspects same plane Let comment am trying bore saturate Caliph Surely plane world newest contemporary Electric source lots useful information interested readers may working similar planes Caliph test vehicle what may extensive power system/plane study ever done addition just plain like plane really flies great dont know what-all accounts its unusually good flyability sure has got flies well have no qualms about suggesting consideration know two now being built club because fact like much Im planning build second Varied Caliph power systems just men tioned last issue promised coverage very matter month Well didnt quite get flight evaluation different systems completed month Ill limit reporting direct-drive systems save story speed reduced system performance future Anywayjust show what has flown far listing motors battery sizes Battery data given number cells cell size Keller 25/1212/800 Astro 15 cobalt 12/800 Astro 15 cobalt geared 12/800 Astro 05 cobalt geared12/800 Astro 05 cobalt geared9/1200 Astro 05 cobalt geared7/1 200 Astro 15 super fer ritei 2/800 Kyosho 360PT geared9/1 200 Kyosho 3605T7/1 200 Kyosho 3605T RPB gears7/1200 actuality real list combinations extensive because entry above will flown prop addition combination first bench run voltage/current/rprn/prop/ power information Folks no small project Caliph direct drive recommendations Before getting details let first describe typical flight three good power systems flight nearly consisted taxi grass field including just cut needs cut conditions taxi followed convincing takeoff climbout fol lowed few high- low-speed flybys touch-and-goes Mixed some just cruisin around some climbs altitude spindowns some inside loopsincluding inside loops level flight after full five minutes flight Typical flight duration exceeded six minutes After many such flights can now strongly recommend Caliph direct drive Astro 15 cobalt Astro 15 super ferrite Keller 25/12all 12/800 batteries can recommend Tornado nylon Top Elite wood 8 x 4 Top Elite 7 x 6 wood like 9 x 5 or9 x 6 TopFlitewoods onthe25/12 latter combination producing highest peak power/climb rate does necessarily exclude other props/brands situation just ones have therefore have used interestingpointthat came out both bench air two Astros indistinguishable performance Physically super ferrite larger heavier cobalt its cheaper Decisions decisions again both work very well Caliph either power easily flies regimen described previously can also say some geared systems worked quite well fact Id quite comfortable flying plane However far can match flyability ofthe direct drives plane Continued page 144 October 1987 141

THROUGHOUT THE YEARS dynamic field model aviation changes have brought about significant progress Model airplanes have evolved very early stick-and-tissue rubber-powered craft todays sophisticated foam-andglass multi-engined ships simultan eous proportional trimmable control step along way someone have courage different daring try something new Too often though attempts imple can muster courage things little differ ently next guy have persistence keep no matter what too can join ranks innovators add much world aviation EBill Evans ment change met resistance slows advancements often have come up new idea place work home met nonacceptance listener closes mind idea has unbudging titude wont work tried before good would have already done Translation Someone greater would have already have done Yet culture thrives new different New ideas products appear day advertising has power change peoples minds about old make room new prime example toy manufacturers TV ads fire chil dren drive get Santa deliver goods way young accepting change Perhaps its because older folks tend remember past certain secure future other hand unknownnot certain certainly secure As know past 15 years 50-year modeling career have spent dealing changein form flying wing could have stuck conventional accepted aircraft chose try new fork road designed Simitar series numbers 20 different configurations flying wings Unfortunately much reaction get Simitar negative Comments like Flying wings unstable inefficient Couldnt afford stab typicaland also typify all-tooprevalent attitudes perceptions beliefs related change Ask demurrers 42 Model Aviation Top Bill says designed thetailless Cap-21 notto suggestthat scale aircraft should tailless produce ship will tip stall process prove concept tailless aircraft Above Astron Xwlng proved have magic its predecessors have ever built flying wing answer no So have no common factual knowledge upon base further discussion Such attitude kind smacks guy doesnt like Chevies has never owned Another reaction hear flying wings practical would use today Interesting SR-7 1 flies three times speed sound flying wing Concorde worlds fastest transport flying wing space shuttle certainly has distance record flying wing Its remarkable attitude perception belief can take precedence over fact form mental pictures what true Ive often asked dont fly conventional aircraft People remark surely could build fly craft choice other Simitar assume favor latter because designed wrong choose Simitar because its special attributes make superior conventional aircraft judgment based years experience experience has carried right through history model aviation first Comet kit Thirties right through Free Flight Control Line early Radio Forties middle Radio Fifties up present have built flown many conventional air craft So choice based past experience conventional versus 15 years experience some not-soconventional wing designs actual per formance flying wing has simply proven itself superior attributes flying wing make better Hawaiians put begin its stability Simitar stable will stall Hard believe true conventional aircraft angle attack wing increased power decreased eventually tail falls wing rolls toward ground ship tip-stalls falls ground Simitar other hand flying wing provides built-in correction sequence events flying wing angle attack increased power de creased initial tendency leading edge wing stall start fall automatically reduces angle attack Result wing never stalls just drops its nose keeps flying Nice huh Can imagine pilots would alive today flying ships wouldnt stall Because its inherent stability Simi tar will virtually stay mode put Give up command stick let off wrn continue climb Give right roll command let off will complete series 3600 turns ship stays hands-off mode wish Simitars response control com mand almost instantaneous depending upon amount stick pressure applied ships swift responsiveness combined its anti-stall characteristic make easy save get trouble Bill Winter very interesting comment about Simitar Desperado recent trip west coast met flew K&B 21-powered Desperado week later called said thinking about flight experience hed come wonder Desperado onboard computer linked mind Hed ex perienced feeling ship executed control commands instant hed thought almost before thought Hed felt though ship extension himself air Another advantage Simitars wide range speed Like fly slow will Like October 1987 43 Desperadoes spite having anhedral 40 60 25cc versions have Inherent stability Bill says best flying Simitar configurations Certainly fast enough anybodys model air force Simitar 540s highperformance pumper-equipped K&B 75 engines have clocked over 185 mph baddest Simitars though version nicknamed Trouble because its speed performance Its onlyforTop Gun pllotswith lots nerve iightning reflexes fly fast Thats okay too 15 mph up 150 mph well within aircrafts range operation makes flying especially windy conditions 30 mph plus cinch No fallout downwind turns Added adaptability Siniltar design lends itself seem ingly endless configurations Anything ap pears possible within design parameters flying wing Gliders gas-powered twin-engined elec tric-powered X-wings V-tail T-tail hedral Simitars Simitars taking 020 engines Simitars designed use 25cc engines theres Scale tailless CAP 21all permutations basic Simitar design flying wing makes outstanding trainer fact isnt widely known yet Can imagine disbelief shock part some Masters have definite preconception what trainer craft should see new flier being trained flying wing Once hes assimilated information imagine Master must react notices quickly kid becomes super pilot capable maneuvers heretofore re served years prac tice think ruffles composure little youre right Such reaction hu man deviations standard practice threat assurances provided past experience though sometimes want cleave tried-and-true model aviation has never stranger change Balsa sticks tissue dope gave way foam ply heat-shrink covering produce almost indestructible easily repairable wing Rubberband power made way ignition engines ignition replaced glow electric power result has increased duration power put aloft planes almostunbelievable size Ambroid uses has yielded cyanoacrylate CyA epoxy glues speeding bonding point can scarcely get fingers out way time affording strength fasten music wire ply fantastic array features available todays radios dizzies imagination open rear Continued na2e 140 44 Model Aviation Double X-Wlng Frank Johnson Flight performance unreal Franka adaptation X-Wing configuration though engines spaced incredible 40 apart An eariier version mis nying wing gilaer ins aracen ii provea have wide speed range demonstrated configurations unique stall-proof characteristics Another variants 049-powered twin ease performance becomes ap parent find completely flyable using either engines Simitar XVwas first powered Simitars Up its time such performance model never experienced maiden voyage made 25mph winds Maneuver #5The Traffic Pattern Try pick time have field yourself Demonstrate low rectangular traffic pattern pointing out turning point references house tree big rock etc Point out way horizon changes Comment horizon changes can trick thinking climbing descending fact flying dead level sun bright tell student Look shadow usually becomes notice able plane about three four feet above ground tell student Lift nose slightly just before wheels touch shadow Demonstrate properly flared landing Have student fly higher pattern teach him trim airplane level flight half-throttle downwind cut back throttle base leg watch positive rate sink cut back idle final concentrate keeping wings level As plane passes have student add power go around again Have student make several circuits traffic pattern Maneuver #6Takeoffs confident student can keep wings level land airplane Put student behind airplane first few takeoffs Give him aiming point far end runway tree chimney etc emphasize Steer left hand Im assuming common Mode II control format throttle/rudder left stick As know airplane can trimdied automatic takeoffs pilot will succeed long he/she doesnt interfere too much Practice student making takeoffs instructor making landings Maneuver #7Landings After fifth take off guide student through landing keep him making takeoffs landings prefer teach landings coming toward pilot because pilot can see both airplane runway have emphasize pilot must see top airplane expects have land front him also good idea point out pilot keeps looking head-on view airplane will hit him head Before airplane lands pilot must see some side view mind important thing have teach about landings what look correct heading sink rate wings level top view side view shadow flare raise nose slightly touchdown agree speed also important plane going too fast will simply bounce back air few times have teach student keep flying plane until stationary ground engine stopped Along about third landing student will have left/right trouble Depend will have alert save plane third training sessionReview Seven Previous Maneuvers will take awhile student needs practice Maneuver #SStalls Spins Recoveries Demonstrate stall put plane spin spiral dive Go through recovery procedure Throttle Back Stick Centered Gentle Pullout Add Power Put plane spin Have student make half-dozen spin recoveries Make sure spin plane both directions Throw power dive two now know knows what open question Will Three sessions solo Does mean student crash-proof No way ready send plane sky filled five six other planes dashing hither yon likely keeps wits about him should able get plane up back down again damage himself others Hell want lot coaching experience before ready fly Masters Pattern As FAA examiner told signed off pilots license Now go learn fly George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Works/Evans Continued page 44 cover Futaba PCM marvel creative mind made instrument practical reality Truly 21st century stuff Like flying wing design tech nologies anticipate future Maybe keeping mind cant hold progress back next time youre field see Gordy Stahl Paul Samaras Mike Tyler Bill Thompson Keith Brauti E 5 ELECTRIC MOTOR MOUNT JT Eli *896 0610075 Motors JT-EL2 *1396 2640 Motors 0360615 cobalta Includes motor hold down strap screws Postage & Handling *250 spplsd br o esa em o m pouoesatrmteaa mountngtO moo pop etno moo s Mount tows nocttang nq moto oes gn pertO ma Motor can mounted ttrougtr met maonna rewa propo CO coc op FREE CATALOG IS ii TMa1 1pUPI MOTN7A~74 b 140 VEABLE CONTROLS fgpIag ACe EASY ADJUSTMENT 24 WIfiA#KIT ONLY $895 1337 e Lw - - PECK UMELI REALLY DO flVi MANY HARD TO FIND ITEMS FOR RUaBER MODELS 35 Peck-Pe4aers-7 -- tDPSETECJTdLU$2U Box 2498 -MA LA MESA CA 92044 QUAY BARBER MODELS V1x4 SHOESTRINGSIRS fl SEMIKiT $11995 KIT515495 Paick Riveas SF211KIT $11995 KIT$15495 wEPOXY/CLASS/FOAM/BALSA CONSTRUCTION WITH DRAWINGS AND DATA FOR FORMULA 120 PYLON SPORT OR STANDOFF SCALE FULL OR SEMIKITSCommic 8 10 lbs wtnightWind 790 sq wing area SEMIKIT $10995 60 2 stroke 12 4 stroke KIT $14495 skit prices plus shipping ecredit cards welcome Ohio residents add 6* 1 216 777-6172 27106 9utternut RidgeNoflh Olmated Ohio 44070 140 Model Aviation SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway Sari Dimas CA 91773 Arc welded seams Durable lightweight construction Frequency filter Pressure nipple Side mount screws Grooved flange positive grip Stacks different lengths Breakaway straps prevent engine damage case crash Silencers d Pipes Manifolds Complete line high quality exhaust systems Super silent tuned pipeseasily adjustable combining top performance effective noise reduction Manifoldslarge variety difficult installations Tuned exhaust systemsunbelievable selection different gas car systems available Versatile compact silencers easy installation Lightweight durable plus much morel See local dealer STM catalog high performance exhaust systems ULi/M UNITED MODEL PRODUCTSA division united Model Distributors 301 Holbrook Dr Wheeling IL 60090 gaIn Robert E Byrd John Cole Steve Hosner Bill Winter others have bitten infective sting Simitar will bit understanding Maybe youll offer encouragement better yet ask let have turn stick flies just like other aircraft better real issue understand flying wing itself what stands Its changes being offered out flying field Most changes improvements advance sport Too often model aviation life change rejected because attitude hearsay has no basis fact People forget change fulcrum progress Its rewarding find out facts yourself trying something own keep open mind about change both innovations see around today well yet come Join flying 21st century RC Electrics/Kopski Continued page 47 appropriate plane feel guess what Ted himself has acquiesced popular mispronunciation says Kay-hf So take pick Now thats settled lets get some serious aspects same plane Let comment am trying bore saturate Caliph Surely plane world newest contemporary Electric source lots useful information interested readers may working similar planes Caliph test vehicle what may extensive power system/plane study ever done addition just plain like plane really flies great dont know what-all accounts its unusually good flyability sure has got flies well have no qualms about suggesting consideration know two now being built club because fact like much Im planning build second Varied Caliph power systems just men tioned last issue promised coverage very matter month Well didnt quite get flight evaluation different systems completed month Ill limit reporting direct-drive systems save story speed reduced system performance future Anywayjust show what has flown far listing motors battery sizes Battery data given number cells cell size Keller 25/1212/800 Astro 15 cobalt 12/800 Astro 15 cobalt geared 12/800 Astro 05 cobalt geared12/800 Astro 05 cobalt geared9/1200 Astro 05 cobalt geared7/1 200 Astro 15 super fer ritei 2/800 Kyosho 360PT geared9/1 200 Kyosho 3605T7/1 200 Kyosho 3605T RPB gears7/1200 actuality real list combinations extensive because entry above will flown prop addition combination first bench run voltage/current/rprn/prop/ power information Folks no small project Caliph direct drive recommendations Before getting details let first describe typical flight three good power systems flight nearly consisted taxi grass field including just cut needs cut conditions taxi followed convincing takeoff climbout fol lowed few high- low-speed flybys touch-and-goes Mixed some just cruisin around some climbs altitude spindowns some inside loopsincluding inside loops level flight after full five minutes flight Typical flight duration exceeded six minutes After many such flights can now strongly recommend Caliph direct drive Astro 15 cobalt Astro 15 super ferrite Keller 25/12all 12/800 batteries can recommend Tornado nylon Top Elite wood 8 x 4 Top Elite 7 x 6 wood like 9 x 5 or9 x 6 TopFlitewoods onthe25/12 latter combination producing highest peak power/climb rate does necessarily exclude other props/brands situation just ones have therefore have used interestingpointthat came out both bench air two Astros indistinguishable performance Physically super ferrite larger heavier cobalt its cheaper Decisions decisions again both work very well Caliph either power easily flies regimen described previously can also say some geared systems worked quite well fact Id quite comfortable flying plane However far can match flyability ofthe direct drives plane Continued page 144 October 1987 141