RADIO CONTROL ELECTRICS ij 73 r] 1I 1 ECS month brings request Jack Reinemeyer 2550 26th St W Bradenton FL 34205 Tel 813 753-3163 Jack wants share Electric others area Now know other Electric modelers Florida because Ive heard have met some past meets Whats needed now near Jack hook up himfor thats what ECS about So please Below My latest Electricnot yet namedis extremely versatile 600square-inch planform has hefted about three pounds way up five pounds far Delightful flier Meet announcement 1993 Gulf States Electric Fly-In scheduled October23 24 Louisiana Polo Field near New Orleans what readers have told becoming excellent meet more activities year further infor mation contact Ben Mathews 101 Mulbeny Metairie LA 70005 Tel 504 833-5589 call Boyd OBtian PO Box 7153 Metairie LA Tel 504 835-5212 April column featured some motor mount suggestions including recently devised using brass straps draw screws time commented Id used method some smaller motors felt would perfectly workable larger ones well Since written Ive actually used method 15s 25s 40s does fact work very well part trying out latest Electric will describe below meantime however Id like suggest refer April issue Id like direct attention photo shows some recent improvements motor mount idea found handling straps related hardware easier square tubing section held I-bend end brass strap short length heatshrink tubing particular Du-Bro yellow tubing proved right choice shrunk tubing prevents square draw tube accidentally slipping off strap end during installation Note necessity improvement handling convenience Similarly found short length Du-Bro green tubing heat shrunk screw itself would keep flat washer under screw head slipping off during handling Just make shrink tubing no longer square section tube enjoy conve nience well As will see below mounting method has tremendous versatility Whatever heres hoping find technique liking May column featured photo very convincing OT ignition wet power plant hiding geared cobalt underneathall business end Playboy taken photo KRC 92 didnt ID modeler time Several readers quickly responded what really should have known first placethe modeler question Jim Duckworth 123 Forrest Lake Dr Warner Robins GA 31093 Jim made dummy engine using cardboard tube such has produced real fooler didnt get right up against didnt know what really Top left Improvements motor tie-down strap shown include use heatshrink tubing pieces keep small parts going astray during installation See April 93 column details September1993 83 Below Heres stuff thats used far Battery packs include three five six seven cells areBottom left Jomar Maxcell wired series andlor parallel neededmicroprocessor-controlled speed control using wire nuts Foam blocks fill openfor large power systems up 40 cells spaces motor battery area VoluminousDesign uses higher-voltage MOSFETs cooling air flow provisioned ModelUnit features setscrew terminal block two motor cabin areas spacious yetof four power leads shown installed plane has clean appearanceWeight shown two ounces Astro cobalt 40 held V-block against motor mount floor plate two tie-down brass strips described Note right thrust typical Vintage design approachworks very well Sermos connectors Jomar SC-6 rear motor Arming switch charge jack visible left side fuselage Ace RIG guidance INTRODUCING h NEW PRECISION PROP NUTS AND HUBS Now greater choice quality Tru-Turn products 3 sizes PROP NUTS ranging 5/8 7/8 diameter 2 shapes available stock R/C engine thread sizes 5 sizes PROP HUBS ranging 1 2 diameter 2 shapes new PROP NUTS PROP HUBS addition existing line precision aluminum spinners range 1-1/2 6 over 90 shapes sizes blade configurations new Tru-Turn PROP HUB line complimented extensive line over 70 adapter kits Tru-Turn makes adapter production R/C engine market have adapter problem. help phone call away. See hobby dealer call us direct. pjV TM RU Made USA PRECISION MODEL PRODUCTS Romco Manufacturing Inc QUALITY ATILITY T LOOKS TY PO Box 836 South Houston Texas 77587 713 / 943-1867 Jim has made sold some others maybe could persuade him behalf well Thanks everyone took trouble write call course thanks Jim very appealing pleasing idea Now can anyone add noise goo second thought forget June column discussed difficulty often encountered charging seven-cell packs simple economy chargers namely sometimes being able attain/maintain desired charge current level Some readers have asked questions about using added peak detectors improve situation points some confusion modeldom about peak detectors Id like clarify matter Add-on peak detectorsat least know ofdo improve basic per formance capability simple charger regard matters discussed June Rather can think peak detector special kind switch does nothing turn charge off appropriate thats So save hard-earned coins capable chargerie designed charge larger numbers cells constant current can have peak detector built like SR Smart Charger can add such BEP MicroPeaker Serious speed controls have around decade earliest such products know first published Joe Utazi 1983 MA construction article control became Joes SC-i produced under Jomar label Over years Joe improved and/or added products including SC-2 SC-4 SC-5 SC-6 SM-4 SM-5 dont know what happened 3 Eventually Joes speed control line also has other products reduced popular item SM-4 sport throttle seven- 21-cell system recently went over speed control collection found over years have accumulated assortment eight above Jomar controls including three current SM-4 designa well-refined excellent performing product Most recently Ive purchased Joes very latestthe Jomar Maxcell microprocessor-controlled speed control Ive chance fly bench its very impressive 12- 40cell speed control basically sets itself up transmitter stick throwie learns what range limits control throw no screws adjust addition has other nice features including standard opto-coupling glitch rejection delayed auto shutdown after missing signal some time optional braking five kHz rate high rate have big Electric works send Joes latest catalog take look product way Jomar moving new n bigger n better facilities can still write Jomar 3440 Riverhills Dr Cincinnati OH 45244 Tel 513 271-3903 latest Electric yet-unnamed model shown photos8 kind ordinary-looking sport cabin job hardly deserves second lookright Wrong Theres story behind ho-humlooking design think unique As write column plane about three weeks old has logged 32 flights powered everything direct drive can motor seven cells cobalt 40 direct 18 Yes did read right design intended fly range motovationand does summary table below gives particulars date some added detail plane simple configuration heavy Vintage design influence wing 10 x 60-inch planform incorporating wellproven 12% flat-bottom Ive using since 60s Dihedral 6 per panel Overall length 40 inches tip spinner end rudder complete covered structure landing gear pushrods weighs 214 ounces complete plane less motor battery prop/spinner weighs 295 ounces radio speed control basic wiring included number weight column table all-up number specified power system Continued page 88 84 Model Aviation ISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Pad No Size Price TI-1502-B 1-112 $1495 Tr-1752-B 13/4 1595 TT-2002-2 .2 1895 TT-2252-B 2-1/4 1995 TT-2262-B 2-1/4 IFAII . 2195 TT-2502-B.2-1/2 2195 TT-251 2-B 2-1/2 FAt 2395 TT-2752-B 2-3/4 2695 TT-2762-B 2-3/4 FAIl 2895 TT-3002-B 3 3095 TT-301 2-B 3 FAIl 3295 TT-3252-B 3-1/4 4195 TT-3502-B 3-1/2 5495 TT-3752-B 3-3/4 6495 TT-4002-B 4 7995 Approx Weight 058 02 095 oz 100 02 160 oz 150 02 190 oz 170 oz 220 oz 200 oz 260 02 250 02 340 oz 470 02 520 02 570 ox 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V Part NoSize TT-0140-A 1/4-28 TT-01 47-A 1/4-28/7mm TT-061 0-A 6 x 1 0mm TT-071 0-A 7 x 1 0mm TT-0516-A 5/16-24 TT-0518-A 5/16-24/8mm TT-0810-A 8x1Omm TT-0825-A 8 x 125mm TT-0375-A 3/8-24 TT-0125-A lOx 125mm Relail Approx Price Weight $595 061 02 595 061 oz 595 . 063 02 595 . 082 02 595 076 02 595 076 oz 595 076 02 595 . 075 02 695 . 117 02 695 .llSoz 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 RC ElectricslKopski Continued page 84 Now realize may bard believe plane actually flies range power systems Ive run reaction own flight line Ive swap ped power systems gaping disbelief some onlookers What witnessed does fly flies well including takeoff grassfor combinationsSo just can same plane fly well 05 40 Simple As Ive labored explain times column nomenclature like oh-five Turbo 550 nd on means nothing What matters watts Watts what flies power systems shown photos cover range about 120 450 wattsnot nearly large range silly nomenclature might imply thats really needed plane accommodate such power range light enough perform low-power end rugged enough carry weight top-power end installation thats course knew would work before started constructionI dont like build naught apply own rules thumb 1983-1984 About Electrics series Model Avi ation build plane Electric should builtlight everywhere strong needed No computer assist ever needed job imagine course building design flying proved point extent Ive already plans requests model flies well Ive never touched transmitter trims very first takeoff through entire range power system complements calm clear wind rain cool warmtestimony feel solid Vintage design influence theres Beyond just wanting prove point regarding power nomen clature nonsense continue slow Elec *Motor 1 Thrustmaster 2 Thrustmaster 3 Cobalt 05 4 Cobalt 05 5 Mast Airsorew 21 gear 6 Mast Airscrew 21 gear 7 Mast Airsorew 21 gear 8 Mast Airsorew 21 gear 9 Mast Airscrew 21k1 gear Battery 7x 14Ah 2 above parallel 7x 14Ah 2 above parallel lOx 14Ah 7x 14Ah 7x 14Ah 2 above parallel 2 above parallel trics growth wanted utility plane purpose Specifically Ive wanting run airborne experiments sorts things needed wide-capability model needed fuselage ample volume ease installation whatever wanted install Indeed just using wide range motors batteries shown requires such installation flexibility ease theres still time time acquire different items try out such other motors speed controls have three latter waiting right now Also Ive got some speed control design ideas own try out wherein circuits would likely bit large bread boardish initially some things prove out youll surprised what neat flight features will open up Also wanted plane could carry on-board telemetry and/or active data logging Im interested tracking such in-flight parameters motor current rpm temperature etc Butyou guessed ittheres also wanted design very easy flying machine lower lighter power end much capable other enda growth trainer will Vintage configuiations generally very good wanted relatively simple inexpensive well fairly easy duplicate might also candi date construction article kit course given last intentions also reasonably attractive appear ance finally thing good enough qualify giveaway annual KRC Electric Fly raffle matter lightly taken around Okay think Ive got above accomplished least set up accom plished Since plans design rather extensive will quite some time till get through fact really need build planes reasonable length time Now name nifty Electric Watch upcoming columns PropWtOz 8x4523 8x4664 8x4514 655 9x6582 10x6583 11x6584 lOx 6 11 x7 664 665 Fit Time 718 * 1016 * 939 1734 1037 340 # 522 # 1700 1619 Table article continued next page 88 Model Aviation HT PERFORMANCE * Motor 10 Mast Airscrew 21 gear 11 Mast Airscrew 21k1 gear 12 Cobalt 05G 13 Cobalt 05G 14 Cobalt 05G 15 Cobalt OSG 16 Cobalt 05G 17 Cobalt 05G 18 Cobalt 05G 19 Cobalt 05G 20 Cobalt 05G 21 Cobalt OSG 22 Cobalt 15 23 Cobalt 1 5G 24 Cobalt 25 25 Cobalt 25 26 Cobalt 25 27 Cobalt 25 28 Cobalt 25 29 Cobalt 25 30 Cobalt 40 31 Cobalt 40 32 Turbo 700 BB FLIGHT PERFORMANCE Continued BatteryPropWtOz 2 above parallel11 x 7665 2 above parallel 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7 x 14 Ah 7x 14Ah 7x 14Ah 2 above parallel 12 x 14 Ah 12x14Ah 14x 14Ah 14x 14Ah 14x 14Ah 14x14Ah 14x 14Ah 14x 14Ah 18x 14Ah 18x 14Ah lOx 14Ah 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 8x4 11 x7 9x6 9x6 9x6 9x6 9x6 9x6 lOx 6 lOx 6 9x6 665 532 532 532 532 532 532 532 532 532 673 615 643 692 692 692 692 692 692 795 795 634 Fit Time 1724 1538 410 # 447 # 808 1002 647 # 926 806 904 928 1257 1457 1410 856 # 1301 1352 1137 1136 1309 1643 1653 1228 marginal ground handling marginal flight # known short flight times because partial charges wind/rain/nightfall flights purposely cut short other reasons Other notes Because wanted present info months column some flight tests above rushed shows up limited data some power combos compared others Also fly adverse weather conditions fit some direct comparisons may inappropriate general trend clear battery longer flight Also flights included some touch-andgoes loops aggressive flying just cruisin no hanging prop other words flights reasonably representative typical sport flight come later So concludes yet mere column Please enclose SASE correspondence youd like reply please address correspondence address Model Aviation Academy Model Aeronautics Note first writing MA appeared September 1983 issue Please accept gratitude being best wishes Happy Electri Flyin Season 4I 131 RAVENWOOD RD VERSAIu ES KY 40383 U I1 Er CAUTION The Gyro-i Twinn-K Will Make Head Spin Gyro-i Fun Fly Aircraft Kit Twinn-K may very well acrobatic aliplane will overfly As soon first flight Gym-i will provide nothing short pure enjoyment rn-flight charactenstics make easy have fun speed 25 1i ht size motor Some things can look forward flying Gyro-i include / AWESOME PUN-PLY MANEUVERS doS rolle/eeoend & 4 dIameter looping tough & gee / EXCELLENT SLOW SPEED STAIILITY- Complete flgeae Se wIthin limited nmwey epeee ean hove- htto landing p0-feet novie fun fll.-t V SUPINE AERODYNAMICS WIng lead 71 56 oaeq ft phie erg eantrol eawfeoee no flutter know process building aircraft fun may taxinq patience times Gyro-i has designed fun fliers fun fliers kit contines time money saving features such - WHEEL GRAPHITE LANDING GEAR AND PIBERGLASS STANDOPPS INCLUDED MO PUSELAGE CONSTRUCTION -2 plm oompoeIte boom PIECE WING DESIGN No jolnte 0g dlhebal ENTIONAL MATERIALS No herd wmtc exotlo materiel TO CONSTRUCT TAIL SIMPACES Eulid over plane JIG DESIGN PROVIDED aircraft kit now available directly Twinn-K Please call further spectications piece order dlRE TAIL PRICE a4770w 13911-1 ST cLsvaANooll 44135~1Y1rLOLJ 11t8995 IWMMP1-loNe 216433-1988 FAX 218267-32W- September 1993 89
Edition: Model Aviation - 1993/09
Page Numbers: 83, 84, 88, 89
RADIO CONTROL ELECTRICS ij 73 r] 1I 1 ECS month brings request Jack Reinemeyer 2550 26th St W Bradenton FL 34205 Tel 813 753-3163 Jack wants share Electric others area Now know other Electric modelers Florida because Ive heard have met some past meets Whats needed now near Jack hook up himfor thats what ECS about So please Below My latest Electricnot yet namedis extremely versatile 600square-inch planform has hefted about three pounds way up five pounds far Delightful flier Meet announcement 1993 Gulf States Electric Fly-In scheduled October23 24 Louisiana Polo Field near New Orleans what readers have told becoming excellent meet more activities year further infor mation contact Ben Mathews 101 Mulbeny Metairie LA 70005 Tel 504 833-5589 call Boyd OBtian PO Box 7153 Metairie LA Tel 504 835-5212 April column featured some motor mount suggestions including recently devised using brass straps draw screws time commented Id used method some smaller motors felt would perfectly workable larger ones well Since written Ive actually used method 15s 25s 40s does fact work very well part trying out latest Electric will describe below meantime however Id like suggest refer April issue Id like direct attention photo shows some recent improvements motor mount idea found handling straps related hardware easier square tubing section held I-bend end brass strap short length heatshrink tubing particular Du-Bro yellow tubing proved right choice shrunk tubing prevents square draw tube accidentally slipping off strap end during installation Note necessity improvement handling convenience Similarly found short length Du-Bro green tubing heat shrunk screw itself would keep flat washer under screw head slipping off during handling Just make shrink tubing no longer square section tube enjoy conve nience well As will see below mounting method has tremendous versatility Whatever heres hoping find technique liking May column featured photo very convincing OT ignition wet power plant hiding geared cobalt underneathall business end Playboy taken photo KRC 92 didnt ID modeler time Several readers quickly responded what really should have known first placethe modeler question Jim Duckworth 123 Forrest Lake Dr Warner Robins GA 31093 Jim made dummy engine using cardboard tube such has produced real fooler didnt get right up against didnt know what really Top left Improvements motor tie-down strap shown include use heatshrink tubing pieces keep small parts going astray during installation See April 93 column details September1993 83 Below Heres stuff thats used far Battery packs include three five six seven cells areBottom left Jomar Maxcell wired series andlor parallel neededmicroprocessor-controlled speed control using wire nuts Foam blocks fill openfor large power systems up 40 cells spaces motor battery area VoluminousDesign uses higher-voltage MOSFETs cooling air flow provisioned ModelUnit features setscrew terminal block two motor cabin areas spacious yetof four power leads shown installed plane has clean appearanceWeight shown two ounces Astro cobalt 40 held V-block against motor mount floor plate two tie-down brass strips described Note right thrust typical Vintage design approachworks very well Sermos connectors Jomar SC-6 rear motor Arming switch charge jack visible left side fuselage Ace RIG guidance INTRODUCING h NEW PRECISION PROP NUTS AND HUBS Now greater choice quality Tru-Turn products 3 sizes PROP NUTS ranging 5/8 7/8 diameter 2 shapes available stock R/C engine thread sizes 5 sizes PROP HUBS ranging 1 2 diameter 2 shapes new PROP NUTS PROP HUBS addition existing line precision aluminum spinners range 1-1/2 6 over 90 shapes sizes blade configurations new Tru-Turn PROP HUB line complimented extensive line over 70 adapter kits Tru-Turn makes adapter production R/C engine market have adapter problem. help phone call away. See hobby dealer call us direct. pjV TM RU Made USA PRECISION MODEL PRODUCTS Romco Manufacturing Inc QUALITY ATILITY T LOOKS TY PO Box 836 South Houston Texas 77587 713 / 943-1867 Jim has made sold some others maybe could persuade him behalf well Thanks everyone took trouble write call course thanks Jim very appealing pleasing idea Now can anyone add noise goo second thought forget June column discussed difficulty often encountered charging seven-cell packs simple economy chargers namely sometimes being able attain/maintain desired charge current level Some readers have asked questions about using added peak detectors improve situation points some confusion modeldom about peak detectors Id like clarify matter Add-on peak detectorsat least know ofdo improve basic per formance capability simple charger regard matters discussed June Rather can think peak detector special kind switch does nothing turn charge off appropriate thats So save hard-earned coins capable chargerie designed charge larger numbers cells constant current can have peak detector built like SR Smart Charger can add such BEP MicroPeaker Serious speed controls have around decade earliest such products know first published Joe Utazi 1983 MA construction article control became Joes SC-i produced under Jomar label Over years Joe improved and/or added products including SC-2 SC-4 SC-5 SC-6 SM-4 SM-5 dont know what happened 3 Eventually Joes speed control line also has other products reduced popular item SM-4 sport throttle seven- 21-cell system recently went over speed control collection found over years have accumulated assortment eight above Jomar controls including three current SM-4 designa well-refined excellent performing product Most recently Ive purchased Joes very latestthe Jomar Maxcell microprocessor-controlled speed control Ive chance fly bench its very impressive 12- 40cell speed control basically sets itself up transmitter stick throwie learns what range limits control throw no screws adjust addition has other nice features including standard opto-coupling glitch rejection delayed auto shutdown after missing signal some time optional braking five kHz rate high rate have big Electric works send Joes latest catalog take look product way Jomar moving new n bigger n better facilities can still write Jomar 3440 Riverhills Dr Cincinnati OH 45244 Tel 513 271-3903 latest Electric yet-unnamed model shown photos8 kind ordinary-looking sport cabin job hardly deserves second lookright Wrong Theres story behind ho-humlooking design think unique As write column plane about three weeks old has logged 32 flights powered everything direct drive can motor seven cells cobalt 40 direct 18 Yes did read right design intended fly range motovationand does summary table below gives particulars date some added detail plane simple configuration heavy Vintage design influence wing 10 x 60-inch planform incorporating wellproven 12% flat-bottom Ive using since 60s Dihedral 6 per panel Overall length 40 inches tip spinner end rudder complete covered structure landing gear pushrods weighs 214 ounces complete plane less motor battery prop/spinner weighs 295 ounces radio speed control basic wiring included number weight column table all-up number specified power system Continued page 88 84 Model Aviation ISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Pad No Size Price TI-1502-B 1-112 $1495 Tr-1752-B 13/4 1595 TT-2002-2 .2 1895 TT-2252-B 2-1/4 1995 TT-2262-B 2-1/4 IFAII . 2195 TT-2502-B.2-1/2 2195 TT-251 2-B 2-1/2 FAt 2395 TT-2752-B 2-3/4 2695 TT-2762-B 2-3/4 FAIl 2895 TT-3002-B 3 3095 TT-301 2-B 3 FAIl 3295 TT-3252-B 3-1/4 4195 TT-3502-B 3-1/2 5495 TT-3752-B 3-3/4 6495 TT-4002-B 4 7995 Approx Weight 058 02 095 oz 100 02 160 oz 150 02 190 oz 170 oz 220 oz 200 oz 260 02 250 02 340 oz 470 02 520 02 570 ox 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V Part NoSize TT-0140-A 1/4-28 TT-01 47-A 1/4-28/7mm TT-061 0-A 6 x 1 0mm TT-071 0-A 7 x 1 0mm TT-0516-A 5/16-24 TT-0518-A 5/16-24/8mm TT-0810-A 8x1Omm TT-0825-A 8 x 125mm TT-0375-A 3/8-24 TT-0125-A lOx 125mm Relail Approx Price Weight $595 061 02 595 061 oz 595 . 063 02 595 . 082 02 595 076 02 595 076 oz 595 076 02 595 . 075 02 695 . 117 02 695 .llSoz 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 RC ElectricslKopski Continued page 84 Now realize may bard believe plane actually flies range power systems Ive run reaction own flight line Ive swap ped power systems gaping disbelief some onlookers What witnessed does fly flies well including takeoff grassfor combinationsSo just can same plane fly well 05 40 Simple As Ive labored explain times column nomenclature like oh-five Turbo 550 nd on means nothing What matters watts Watts what flies power systems shown photos cover range about 120 450 wattsnot nearly large range silly nomenclature might imply thats really needed plane accommodate such power range light enough perform low-power end rugged enough carry weight top-power end installation thats course knew would work before started constructionI dont like build naught apply own rules thumb 1983-1984 About Electrics series Model Avi ation build plane Electric should builtlight everywhere strong needed No computer assist ever needed job imagine course building design flying proved point extent Ive already plans requests model flies well Ive never touched transmitter trims very first takeoff through entire range power system complements calm clear wind rain cool warmtestimony feel solid Vintage design influence theres Beyond just wanting prove point regarding power nomen clature nonsense continue slow Elec *Motor 1 Thrustmaster 2 Thrustmaster 3 Cobalt 05 4 Cobalt 05 5 Mast Airsorew 21 gear 6 Mast Airscrew 21 gear 7 Mast Airsorew 21 gear 8 Mast Airsorew 21 gear 9 Mast Airscrew 21k1 gear Battery 7x 14Ah 2 above parallel 7x 14Ah 2 above parallel lOx 14Ah 7x 14Ah 7x 14Ah 2 above parallel 2 above parallel trics growth wanted utility plane purpose Specifically Ive wanting run airborne experiments sorts things needed wide-capability model needed fuselage ample volume ease installation whatever wanted install Indeed just using wide range motors batteries shown requires such installation flexibility ease theres still time time acquire different items try out such other motors speed controls have three latter waiting right now Also Ive got some speed control design ideas own try out wherein circuits would likely bit large bread boardish initially some things prove out youll surprised what neat flight features will open up Also wanted plane could carry on-board telemetry and/or active data logging Im interested tracking such in-flight parameters motor current rpm temperature etc Butyou guessed ittheres also wanted design very easy flying machine lower lighter power end much capable other enda growth trainer will Vintage configuiations generally very good wanted relatively simple inexpensive well fairly easy duplicate might also candi date construction article kit course given last intentions also reasonably attractive appear ance finally thing good enough qualify giveaway annual KRC Electric Fly raffle matter lightly taken around Okay think Ive got above accomplished least set up accom plished Since plans design rather extensive will quite some time till get through fact really need build planes reasonable length time Now name nifty Electric Watch upcoming columns PropWtOz 8x4523 8x4664 8x4514 655 9x6582 10x6583 11x6584 lOx 6 11 x7 664 665 Fit Time 718 * 1016 * 939 1734 1037 340 # 522 # 1700 1619 Table article continued next page 88 Model Aviation HT PERFORMANCE * Motor 10 Mast Airscrew 21 gear 11 Mast Airscrew 21k1 gear 12 Cobalt 05G 13 Cobalt 05G 14 Cobalt 05G 15 Cobalt OSG 16 Cobalt 05G 17 Cobalt 05G 18 Cobalt 05G 19 Cobalt 05G 20 Cobalt 05G 21 Cobalt OSG 22 Cobalt 15 23 Cobalt 1 5G 24 Cobalt 25 25 Cobalt 25 26 Cobalt 25 27 Cobalt 25 28 Cobalt 25 29 Cobalt 25 30 Cobalt 40 31 Cobalt 40 32 Turbo 700 BB FLIGHT PERFORMANCE Continued BatteryPropWtOz 2 above parallel11 x 7665 2 above parallel 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7 x 14 Ah 7x 14Ah 7x 14Ah 2 above parallel 12 x 14 Ah 12x14Ah 14x 14Ah 14x 14Ah 14x 14Ah 14x14Ah 14x 14Ah 14x 14Ah 18x 14Ah 18x 14Ah lOx 14Ah 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 8x4 11 x7 9x6 9x6 9x6 9x6 9x6 9x6 lOx 6 lOx 6 9x6 665 532 532 532 532 532 532 532 532 532 673 615 643 692 692 692 692 692 692 795 795 634 Fit Time 1724 1538 410 # 447 # 808 1002 647 # 926 806 904 928 1257 1457 1410 856 # 1301 1352 1137 1136 1309 1643 1653 1228 marginal ground handling marginal flight # known short flight times because partial charges wind/rain/nightfall flights purposely cut short other reasons Other notes Because wanted present info months column some flight tests above rushed shows up limited data some power combos compared others Also fly adverse weather conditions fit some direct comparisons may inappropriate general trend clear battery longer flight Also flights included some touch-andgoes loops aggressive flying just cruisin no hanging prop other words flights reasonably representative typical sport flight come later So concludes yet mere column Please enclose SASE correspondence youd like reply please address correspondence address Model Aviation Academy Model Aeronautics Note first writing MA appeared September 1983 issue Please accept gratitude being best wishes Happy Electri Flyin Season 4I 131 RAVENWOOD RD VERSAIu ES KY 40383 U I1 Er CAUTION The Gyro-i Twinn-K Will Make Head Spin Gyro-i Fun Fly Aircraft Kit Twinn-K may very well acrobatic aliplane will overfly As soon first flight Gym-i will provide nothing short pure enjoyment rn-flight charactenstics make easy have fun speed 25 1i ht size motor Some things can look forward flying Gyro-i include / AWESOME PUN-PLY MANEUVERS doS rolle/eeoend & 4 dIameter looping tough & gee / EXCELLENT SLOW SPEED STAIILITY- Complete flgeae Se wIthin limited nmwey epeee ean hove- htto landing p0-feet novie fun fll.-t V SUPINE AERODYNAMICS WIng lead 71 56 oaeq ft phie erg eantrol eawfeoee no flutter know process building aircraft fun may taxinq patience times Gyro-i has designed fun fliers fun fliers kit contines time money saving features such - WHEEL GRAPHITE LANDING GEAR AND PIBERGLASS STANDOPPS INCLUDED MO PUSELAGE CONSTRUCTION -2 plm oompoeIte boom PIECE WING DESIGN No jolnte 0g dlhebal ENTIONAL MATERIALS No herd wmtc exotlo materiel TO CONSTRUCT TAIL SIMPACES Eulid over plane JIG DESIGN PROVIDED aircraft kit now available directly Twinn-K Please call further spectications piece order dlRE TAIL PRICE a4770w 13911-1 ST cLsvaANooll 44135~1Y1rLOLJ 11t8995 IWMMP1-loNe 216433-1988 FAX 218267-32W- September 1993 89
Edition: Model Aviation - 1993/09
Page Numbers: 83, 84, 88, 89
RADIO CONTROL ELECTRICS ij 73 r] 1I 1 ECS month brings request Jack Reinemeyer 2550 26th St W Bradenton FL 34205 Tel 813 753-3163 Jack wants share Electric others area Now know other Electric modelers Florida because Ive heard have met some past meets Whats needed now near Jack hook up himfor thats what ECS about So please Below My latest Electricnot yet namedis extremely versatile 600square-inch planform has hefted about three pounds way up five pounds far Delightful flier Meet announcement 1993 Gulf States Electric Fly-In scheduled October23 24 Louisiana Polo Field near New Orleans what readers have told becoming excellent meet more activities year further infor mation contact Ben Mathews 101 Mulbeny Metairie LA 70005 Tel 504 833-5589 call Boyd OBtian PO Box 7153 Metairie LA Tel 504 835-5212 April column featured some motor mount suggestions including recently devised using brass straps draw screws time commented Id used method some smaller motors felt would perfectly workable larger ones well Since written Ive actually used method 15s 25s 40s does fact work very well part trying out latest Electric will describe below meantime however Id like suggest refer April issue Id like direct attention photo shows some recent improvements motor mount idea found handling straps related hardware easier square tubing section held I-bend end brass strap short length heatshrink tubing particular Du-Bro yellow tubing proved right choice shrunk tubing prevents square draw tube accidentally slipping off strap end during installation Note necessity improvement handling convenience Similarly found short length Du-Bro green tubing heat shrunk screw itself would keep flat washer under screw head slipping off during handling Just make shrink tubing no longer square section tube enjoy conve nience well As will see below mounting method has tremendous versatility Whatever heres hoping find technique liking May column featured photo very convincing OT ignition wet power plant hiding geared cobalt underneathall business end Playboy taken photo KRC 92 didnt ID modeler time Several readers quickly responded what really should have known first placethe modeler question Jim Duckworth 123 Forrest Lake Dr Warner Robins GA 31093 Jim made dummy engine using cardboard tube such has produced real fooler didnt get right up against didnt know what really Top left Improvements motor tie-down strap shown include use heatshrink tubing pieces keep small parts going astray during installation See April 93 column details September1993 83 Below Heres stuff thats used far Battery packs include three five six seven cells areBottom left Jomar Maxcell wired series andlor parallel neededmicroprocessor-controlled speed control using wire nuts Foam blocks fill openfor large power systems up 40 cells spaces motor battery area VoluminousDesign uses higher-voltage MOSFETs cooling air flow provisioned ModelUnit features setscrew terminal block two motor cabin areas spacious yetof four power leads shown installed plane has clean appearanceWeight shown two ounces Astro cobalt 40 held V-block against motor mount floor plate two tie-down brass strips described Note right thrust typical Vintage design approachworks very well Sermos connectors Jomar SC-6 rear motor Arming switch charge jack visible left side fuselage Ace RIG guidance INTRODUCING h NEW PRECISION PROP NUTS AND HUBS Now greater choice quality Tru-Turn products 3 sizes PROP NUTS ranging 5/8 7/8 diameter 2 shapes available stock R/C engine thread sizes 5 sizes PROP HUBS ranging 1 2 diameter 2 shapes new PROP NUTS PROP HUBS addition existing line precision aluminum spinners range 1-1/2 6 over 90 shapes sizes blade configurations new Tru-Turn PROP HUB line complimented extensive line over 70 adapter kits Tru-Turn makes adapter production R/C engine market have adapter problem. help phone call away. See hobby dealer call us direct. pjV TM RU Made USA PRECISION MODEL PRODUCTS Romco Manufacturing Inc QUALITY ATILITY T LOOKS TY PO Box 836 South Houston Texas 77587 713 / 943-1867 Jim has made sold some others maybe could persuade him behalf well Thanks everyone took trouble write call course thanks Jim very appealing pleasing idea Now can anyone add noise goo second thought forget June column discussed difficulty often encountered charging seven-cell packs simple economy chargers namely sometimes being able attain/maintain desired charge current level Some readers have asked questions about using added peak detectors improve situation points some confusion modeldom about peak detectors Id like clarify matter Add-on peak detectorsat least know ofdo improve basic per formance capability simple charger regard matters discussed June Rather can think peak detector special kind switch does nothing turn charge off appropriate thats So save hard-earned coins capable chargerie designed charge larger numbers cells constant current can have peak detector built like SR Smart Charger can add such BEP MicroPeaker Serious speed controls have around decade earliest such products know first published Joe Utazi 1983 MA construction article control became Joes SC-i produced under Jomar label Over years Joe improved and/or added products including SC-2 SC-4 SC-5 SC-6 SM-4 SM-5 dont know what happened 3 Eventually Joes speed control line also has other products reduced popular item SM-4 sport throttle seven- 21-cell system recently went over speed control collection found over years have accumulated assortment eight above Jomar controls including three current SM-4 designa well-refined excellent performing product Most recently Ive purchased Joes very latestthe Jomar Maxcell microprocessor-controlled speed control Ive chance fly bench its very impressive 12- 40cell speed control basically sets itself up transmitter stick throwie learns what range limits control throw no screws adjust addition has other nice features including standard opto-coupling glitch rejection delayed auto shutdown after missing signal some time optional braking five kHz rate high rate have big Electric works send Joes latest catalog take look product way Jomar moving new n bigger n better facilities can still write Jomar 3440 Riverhills Dr Cincinnati OH 45244 Tel 513 271-3903 latest Electric yet-unnamed model shown photos8 kind ordinary-looking sport cabin job hardly deserves second lookright Wrong Theres story behind ho-humlooking design think unique As write column plane about three weeks old has logged 32 flights powered everything direct drive can motor seven cells cobalt 40 direct 18 Yes did read right design intended fly range motovationand does summary table below gives particulars date some added detail plane simple configuration heavy Vintage design influence wing 10 x 60-inch planform incorporating wellproven 12% flat-bottom Ive using since 60s Dihedral 6 per panel Overall length 40 inches tip spinner end rudder complete covered structure landing gear pushrods weighs 214 ounces complete plane less motor battery prop/spinner weighs 295 ounces radio speed control basic wiring included number weight column table all-up number specified power system Continued page 88 84 Model Aviation ISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Pad No Size Price TI-1502-B 1-112 $1495 Tr-1752-B 13/4 1595 TT-2002-2 .2 1895 TT-2252-B 2-1/4 1995 TT-2262-B 2-1/4 IFAII . 2195 TT-2502-B.2-1/2 2195 TT-251 2-B 2-1/2 FAt 2395 TT-2752-B 2-3/4 2695 TT-2762-B 2-3/4 FAIl 2895 TT-3002-B 3 3095 TT-301 2-B 3 FAIl 3295 TT-3252-B 3-1/4 4195 TT-3502-B 3-1/2 5495 TT-3752-B 3-3/4 6495 TT-4002-B 4 7995 Approx Weight 058 02 095 oz 100 02 160 oz 150 02 190 oz 170 oz 220 oz 200 oz 260 02 250 02 340 oz 470 02 520 02 570 ox 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V Part NoSize TT-0140-A 1/4-28 TT-01 47-A 1/4-28/7mm TT-061 0-A 6 x 1 0mm TT-071 0-A 7 x 1 0mm TT-0516-A 5/16-24 TT-0518-A 5/16-24/8mm TT-0810-A 8x1Omm TT-0825-A 8 x 125mm TT-0375-A 3/8-24 TT-0125-A lOx 125mm Relail Approx Price Weight $595 061 02 595 061 oz 595 . 063 02 595 . 082 02 595 076 02 595 076 oz 595 076 02 595 . 075 02 695 . 117 02 695 .llSoz 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 RC ElectricslKopski Continued page 84 Now realize may bard believe plane actually flies range power systems Ive run reaction own flight line Ive swap ped power systems gaping disbelief some onlookers What witnessed does fly flies well including takeoff grassfor combinationsSo just can same plane fly well 05 40 Simple As Ive labored explain times column nomenclature like oh-five Turbo 550 nd on means nothing What matters watts Watts what flies power systems shown photos cover range about 120 450 wattsnot nearly large range silly nomenclature might imply thats really needed plane accommodate such power range light enough perform low-power end rugged enough carry weight top-power end installation thats course knew would work before started constructionI dont like build naught apply own rules thumb 1983-1984 About Electrics series Model Avi ation build plane Electric should builtlight everywhere strong needed No computer assist ever needed job imagine course building design flying proved point extent Ive already plans requests model flies well Ive never touched transmitter trims very first takeoff through entire range power system complements calm clear wind rain cool warmtestimony feel solid Vintage design influence theres Beyond just wanting prove point regarding power nomen clature nonsense continue slow Elec *Motor 1 Thrustmaster 2 Thrustmaster 3 Cobalt 05 4 Cobalt 05 5 Mast Airsorew 21 gear 6 Mast Airscrew 21 gear 7 Mast Airsorew 21 gear 8 Mast Airsorew 21 gear 9 Mast Airscrew 21k1 gear Battery 7x 14Ah 2 above parallel 7x 14Ah 2 above parallel lOx 14Ah 7x 14Ah 7x 14Ah 2 above parallel 2 above parallel trics growth wanted utility plane purpose Specifically Ive wanting run airborne experiments sorts things needed wide-capability model needed fuselage ample volume ease installation whatever wanted install Indeed just using wide range motors batteries shown requires such installation flexibility ease theres still time time acquire different items try out such other motors speed controls have three latter waiting right now Also Ive got some speed control design ideas own try out wherein circuits would likely bit large bread boardish initially some things prove out youll surprised what neat flight features will open up Also wanted plane could carry on-board telemetry and/or active data logging Im interested tracking such in-flight parameters motor current rpm temperature etc Butyou guessed ittheres also wanted design very easy flying machine lower lighter power end much capable other enda growth trainer will Vintage configuiations generally very good wanted relatively simple inexpensive well fairly easy duplicate might also candi date construction article kit course given last intentions also reasonably attractive appear ance finally thing good enough qualify giveaway annual KRC Electric Fly raffle matter lightly taken around Okay think Ive got above accomplished least set up accom plished Since plans design rather extensive will quite some time till get through fact really need build planes reasonable length time Now name nifty Electric Watch upcoming columns PropWtOz 8x4523 8x4664 8x4514 655 9x6582 10x6583 11x6584 lOx 6 11 x7 664 665 Fit Time 718 * 1016 * 939 1734 1037 340 # 522 # 1700 1619 Table article continued next page 88 Model Aviation HT PERFORMANCE * Motor 10 Mast Airscrew 21 gear 11 Mast Airscrew 21k1 gear 12 Cobalt 05G 13 Cobalt 05G 14 Cobalt 05G 15 Cobalt OSG 16 Cobalt 05G 17 Cobalt 05G 18 Cobalt 05G 19 Cobalt 05G 20 Cobalt 05G 21 Cobalt OSG 22 Cobalt 15 23 Cobalt 1 5G 24 Cobalt 25 25 Cobalt 25 26 Cobalt 25 27 Cobalt 25 28 Cobalt 25 29 Cobalt 25 30 Cobalt 40 31 Cobalt 40 32 Turbo 700 BB FLIGHT PERFORMANCE Continued BatteryPropWtOz 2 above parallel11 x 7665 2 above parallel 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7 x 14 Ah 7x 14Ah 7x 14Ah 2 above parallel 12 x 14 Ah 12x14Ah 14x 14Ah 14x 14Ah 14x 14Ah 14x14Ah 14x 14Ah 14x 14Ah 18x 14Ah 18x 14Ah lOx 14Ah 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 8x4 11 x7 9x6 9x6 9x6 9x6 9x6 9x6 lOx 6 lOx 6 9x6 665 532 532 532 532 532 532 532 532 532 673 615 643 692 692 692 692 692 692 795 795 634 Fit Time 1724 1538 410 # 447 # 808 1002 647 # 926 806 904 928 1257 1457 1410 856 # 1301 1352 1137 1136 1309 1643 1653 1228 marginal ground handling marginal flight # known short flight times because partial charges wind/rain/nightfall flights purposely cut short other reasons Other notes Because wanted present info months column some flight tests above rushed shows up limited data some power combos compared others Also fly adverse weather conditions fit some direct comparisons may inappropriate general trend clear battery longer flight Also flights included some touch-andgoes loops aggressive flying just cruisin no hanging prop other words flights reasonably representative typical sport flight come later So concludes yet mere column Please enclose SASE correspondence youd like reply please address correspondence address Model Aviation Academy Model Aeronautics Note first writing MA appeared September 1983 issue Please accept gratitude being best wishes Happy Electri Flyin Season 4I 131 RAVENWOOD RD VERSAIu ES KY 40383 U I1 Er CAUTION The Gyro-i Twinn-K Will Make Head Spin Gyro-i Fun Fly Aircraft Kit Twinn-K may very well acrobatic aliplane will overfly As soon first flight Gym-i will provide nothing short pure enjoyment rn-flight charactenstics make easy have fun speed 25 1i ht size motor Some things can look forward flying Gyro-i include / AWESOME PUN-PLY MANEUVERS doS rolle/eeoend & 4 dIameter looping tough & gee / EXCELLENT SLOW SPEED STAIILITY- Complete flgeae Se wIthin limited nmwey epeee ean hove- htto landing p0-feet novie fun fll.-t V SUPINE AERODYNAMICS WIng lead 71 56 oaeq ft phie erg eantrol eawfeoee no flutter know process building aircraft fun may taxinq patience times Gyro-i has designed fun fliers fun fliers kit contines time money saving features such - WHEEL GRAPHITE LANDING GEAR AND PIBERGLASS STANDOPPS INCLUDED MO PUSELAGE CONSTRUCTION -2 plm oompoeIte boom PIECE WING DESIGN No jolnte 0g dlhebal ENTIONAL MATERIALS No herd wmtc exotlo materiel TO CONSTRUCT TAIL SIMPACES Eulid over plane JIG DESIGN PROVIDED aircraft kit now available directly Twinn-K Please call further spectications piece order dlRE TAIL PRICE a4770w 13911-1 ST cLsvaANooll 44135~1Y1rLOLJ 11t8995 IWMMP1-loNe 216433-1988 FAX 218267-32W- September 1993 89
Edition: Model Aviation - 1993/09
Page Numbers: 83, 84, 88, 89
RADIO CONTROL ELECTRICS ij 73 r] 1I 1 ECS month brings request Jack Reinemeyer 2550 26th St W Bradenton FL 34205 Tel 813 753-3163 Jack wants share Electric others area Now know other Electric modelers Florida because Ive heard have met some past meets Whats needed now near Jack hook up himfor thats what ECS about So please Below My latest Electricnot yet namedis extremely versatile 600square-inch planform has hefted about three pounds way up five pounds far Delightful flier Meet announcement 1993 Gulf States Electric Fly-In scheduled October23 24 Louisiana Polo Field near New Orleans what readers have told becoming excellent meet more activities year further infor mation contact Ben Mathews 101 Mulbeny Metairie LA 70005 Tel 504 833-5589 call Boyd OBtian PO Box 7153 Metairie LA Tel 504 835-5212 April column featured some motor mount suggestions including recently devised using brass straps draw screws time commented Id used method some smaller motors felt would perfectly workable larger ones well Since written Ive actually used method 15s 25s 40s does fact work very well part trying out latest Electric will describe below meantime however Id like suggest refer April issue Id like direct attention photo shows some recent improvements motor mount idea found handling straps related hardware easier square tubing section held I-bend end brass strap short length heatshrink tubing particular Du-Bro yellow tubing proved right choice shrunk tubing prevents square draw tube accidentally slipping off strap end during installation Note necessity improvement handling convenience Similarly found short length Du-Bro green tubing heat shrunk screw itself would keep flat washer under screw head slipping off during handling Just make shrink tubing no longer square section tube enjoy conve nience well As will see below mounting method has tremendous versatility Whatever heres hoping find technique liking May column featured photo very convincing OT ignition wet power plant hiding geared cobalt underneathall business end Playboy taken photo KRC 92 didnt ID modeler time Several readers quickly responded what really should have known first placethe modeler question Jim Duckworth 123 Forrest Lake Dr Warner Robins GA 31093 Jim made dummy engine using cardboard tube such has produced real fooler didnt get right up against didnt know what really Top left Improvements motor tie-down strap shown include use heatshrink tubing pieces keep small parts going astray during installation See April 93 column details September1993 83 Below Heres stuff thats used far Battery packs include three five six seven cells areBottom left Jomar Maxcell wired series andlor parallel neededmicroprocessor-controlled speed control using wire nuts Foam blocks fill openfor large power systems up 40 cells spaces motor battery area VoluminousDesign uses higher-voltage MOSFETs cooling air flow provisioned ModelUnit features setscrew terminal block two motor cabin areas spacious yetof four power leads shown installed plane has clean appearanceWeight shown two ounces Astro cobalt 40 held V-block against motor mount floor plate two tie-down brass strips described Note right thrust typical Vintage design approachworks very well Sermos connectors Jomar SC-6 rear motor Arming switch charge jack visible left side fuselage Ace RIG guidance INTRODUCING h NEW PRECISION PROP NUTS AND HUBS Now greater choice quality Tru-Turn products 3 sizes PROP NUTS ranging 5/8 7/8 diameter 2 shapes available stock R/C engine thread sizes 5 sizes PROP HUBS ranging 1 2 diameter 2 shapes new PROP NUTS PROP HUBS addition existing line precision aluminum spinners range 1-1/2 6 over 90 shapes sizes blade configurations new Tru-Turn PROP HUB line complimented extensive line over 70 adapter kits Tru-Turn makes adapter production R/C engine market have adapter problem. help phone call away. See hobby dealer call us direct. pjV TM RU Made USA PRECISION MODEL PRODUCTS Romco Manufacturing Inc QUALITY ATILITY T LOOKS TY PO Box 836 South Houston Texas 77587 713 / 943-1867 Jim has made sold some others maybe could persuade him behalf well Thanks everyone took trouble write call course thanks Jim very appealing pleasing idea Now can anyone add noise goo second thought forget June column discussed difficulty often encountered charging seven-cell packs simple economy chargers namely sometimes being able attain/maintain desired charge current level Some readers have asked questions about using added peak detectors improve situation points some confusion modeldom about peak detectors Id like clarify matter Add-on peak detectorsat least know ofdo improve basic per formance capability simple charger regard matters discussed June Rather can think peak detector special kind switch does nothing turn charge off appropriate thats So save hard-earned coins capable chargerie designed charge larger numbers cells constant current can have peak detector built like SR Smart Charger can add such BEP MicroPeaker Serious speed controls have around decade earliest such products know first published Joe Utazi 1983 MA construction article control became Joes SC-i produced under Jomar label Over years Joe improved and/or added products including SC-2 SC-4 SC-5 SC-6 SM-4 SM-5 dont know what happened 3 Eventually Joes speed control line also has other products reduced popular item SM-4 sport throttle seven- 21-cell system recently went over speed control collection found over years have accumulated assortment eight above Jomar controls including three current SM-4 designa well-refined excellent performing product Most recently Ive purchased Joes very latestthe Jomar Maxcell microprocessor-controlled speed control Ive chance fly bench its very impressive 12- 40cell speed control basically sets itself up transmitter stick throwie learns what range limits control throw no screws adjust addition has other nice features including standard opto-coupling glitch rejection delayed auto shutdown after missing signal some time optional braking five kHz rate high rate have big Electric works send Joes latest catalog take look product way Jomar moving new n bigger n better facilities can still write Jomar 3440 Riverhills Dr Cincinnati OH 45244 Tel 513 271-3903 latest Electric yet-unnamed model shown photos8 kind ordinary-looking sport cabin job hardly deserves second lookright Wrong Theres story behind ho-humlooking design think unique As write column plane about three weeks old has logged 32 flights powered everything direct drive can motor seven cells cobalt 40 direct 18 Yes did read right design intended fly range motovationand does summary table below gives particulars date some added detail plane simple configuration heavy Vintage design influence wing 10 x 60-inch planform incorporating wellproven 12% flat-bottom Ive using since 60s Dihedral 6 per panel Overall length 40 inches tip spinner end rudder complete covered structure landing gear pushrods weighs 214 ounces complete plane less motor battery prop/spinner weighs 295 ounces radio speed control basic wiring included number weight column table all-up number specified power system Continued page 88 84 Model Aviation ISION MODEL PRODUCTS Made USA BARSTOCK ALUMINUM SPINNERS Retail Pad No Size Price TI-1502-B 1-112 $1495 Tr-1752-B 13/4 1595 TT-2002-2 .2 1895 TT-2252-B 2-1/4 1995 TT-2262-B 2-1/4 IFAII . 2195 TT-2502-B.2-1/2 2195 TT-251 2-B 2-1/2 FAt 2395 TT-2752-B 2-3/4 2695 TT-2762-B 2-3/4 FAIl 2895 TT-3002-B 3 3095 TT-301 2-B 3 FAIl 3295 TT-3252-B 3-1/4 4195 TT-3502-B 3-1/2 5495 TT-3752-B 3-3/4 6495 TT-4002-B 4 7995 Approx Weight 058 02 095 oz 100 02 160 oz 150 02 190 oz 170 oz 220 oz 200 oz 260 02 250 02 340 oz 470 02 520 02 570 ox 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $3 00 Per Spinner PROP NUT ADAPTORS V Part NoSize TT-0140-A 1/4-28 TT-01 47-A 1/4-28/7mm TT-061 0-A 6 x 1 0mm TT-071 0-A 7 x 1 0mm TT-0516-A 5/16-24 TT-0518-A 5/16-24/8mm TT-0810-A 8x1Omm TT-0825-A 8 x 125mm TT-0375-A 3/8-24 TT-0125-A lOx 125mm Relail Approx Price Weight $595 061 02 595 061 oz 595 . 063 02 595 . 082 02 595 076 02 595 076 oz 595 076 02 595 . 075 02 695 . 117 02 695 .llSoz 3 Pieces Nut Washer aird Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 RC ElectricslKopski Continued page 84 Now realize may bard believe plane actually flies range power systems Ive run reaction own flight line Ive swap ped power systems gaping disbelief some onlookers What witnessed does fly flies well including takeoff grassfor combinationsSo just can same plane fly well 05 40 Simple As Ive labored explain times column nomenclature like oh-five Turbo 550 nd on means nothing What matters watts Watts what flies power systems shown photos cover range about 120 450 wattsnot nearly large range silly nomenclature might imply thats really needed plane accommodate such power range light enough perform low-power end rugged enough carry weight top-power end installation thats course knew would work before started constructionI dont like build naught apply own rules thumb 1983-1984 About Electrics series Model Avi ation build plane Electric should builtlight everywhere strong needed No computer assist ever needed job imagine course building design flying proved point extent Ive already plans requests model flies well Ive never touched transmitter trims very first takeoff through entire range power system complements calm clear wind rain cool warmtestimony feel solid Vintage design influence theres Beyond just wanting prove point regarding power nomen clature nonsense continue slow Elec *Motor 1 Thrustmaster 2 Thrustmaster 3 Cobalt 05 4 Cobalt 05 5 Mast Airsorew 21 gear 6 Mast Airscrew 21 gear 7 Mast Airsorew 21 gear 8 Mast Airsorew 21 gear 9 Mast Airscrew 21k1 gear Battery 7x 14Ah 2 above parallel 7x 14Ah 2 above parallel lOx 14Ah 7x 14Ah 7x 14Ah 2 above parallel 2 above parallel trics growth wanted utility plane purpose Specifically Ive wanting run airborne experiments sorts things needed wide-capability model needed fuselage ample volume ease installation whatever wanted install Indeed just using wide range motors batteries shown requires such installation flexibility ease theres still time time acquire different items try out such other motors speed controls have three latter waiting right now Also Ive got some speed control design ideas own try out wherein circuits would likely bit large bread boardish initially some things prove out youll surprised what neat flight features will open up Also wanted plane could carry on-board telemetry and/or active data logging Im interested tracking such in-flight parameters motor current rpm temperature etc Butyou guessed ittheres also wanted design very easy flying machine lower lighter power end much capable other enda growth trainer will Vintage configuiations generally very good wanted relatively simple inexpensive well fairly easy duplicate might also candi date construction article kit course given last intentions also reasonably attractive appear ance finally thing good enough qualify giveaway annual KRC Electric Fly raffle matter lightly taken around Okay think Ive got above accomplished least set up accom plished Since plans design rather extensive will quite some time till get through fact really need build planes reasonable length time Now name nifty Electric Watch upcoming columns PropWtOz 8x4523 8x4664 8x4514 655 9x6582 10x6583 11x6584 lOx 6 11 x7 664 665 Fit Time 718 * 1016 * 939 1734 1037 340 # 522 # 1700 1619 Table article continued next page 88 Model Aviation HT PERFORMANCE * Motor 10 Mast Airscrew 21 gear 11 Mast Airscrew 21k1 gear 12 Cobalt 05G 13 Cobalt 05G 14 Cobalt 05G 15 Cobalt OSG 16 Cobalt 05G 17 Cobalt 05G 18 Cobalt 05G 19 Cobalt 05G 20 Cobalt 05G 21 Cobalt OSG 22 Cobalt 15 23 Cobalt 1 5G 24 Cobalt 25 25 Cobalt 25 26 Cobalt 25 27 Cobalt 25 28 Cobalt 25 29 Cobalt 25 30 Cobalt 40 31 Cobalt 40 32 Turbo 700 BB FLIGHT PERFORMANCE Continued BatteryPropWtOz 2 above parallel11 x 7665 2 above parallel 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7x 14Ah 7 x 14 Ah 7x 14Ah 7x 14Ah 2 above parallel 12 x 14 Ah 12x14Ah 14x 14Ah 14x 14Ah 14x 14Ah 14x14Ah 14x 14Ah 14x 14Ah 18x 14Ah 18x 14Ah lOx 14Ah 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 11 x7 8x4 11 x7 9x6 9x6 9x6 9x6 9x6 9x6 lOx 6 lOx 6 9x6 665 532 532 532 532 532 532 532 532 532 673 615 643 692 692 692 692 692 692 795 795 634 Fit Time 1724 1538 410 # 447 # 808 1002 647 # 926 806 904 928 1257 1457 1410 856 # 1301 1352 1137 1136 1309 1643 1653 1228 marginal ground handling marginal flight # known short flight times because partial charges wind/rain/nightfall flights purposely cut short other reasons Other notes Because wanted present info months column some flight tests above rushed shows up limited data some power combos compared others Also fly adverse weather conditions fit some direct comparisons may inappropriate general trend clear battery longer flight Also flights included some touch-andgoes loops aggressive flying just cruisin no hanging prop other words flights reasonably representative typical sport flight come later So concludes yet mere column Please enclose SASE correspondence youd like reply please address correspondence address Model Aviation Academy Model Aeronautics Note first writing MA appeared September 1983 issue Please accept gratitude being best wishes Happy Electri Flyin Season 4I 131 RAVENWOOD RD VERSAIu ES KY 40383 U I1 Er CAUTION The Gyro-i Twinn-K Will Make Head Spin Gyro-i Fun Fly Aircraft Kit Twinn-K may very well acrobatic aliplane will overfly As soon first flight Gym-i will provide nothing short pure enjoyment rn-flight charactenstics make easy have fun speed 25 1i ht size motor Some things can look forward flying Gyro-i include / AWESOME PUN-PLY MANEUVERS doS rolle/eeoend & 4 dIameter looping tough & gee / EXCELLENT SLOW SPEED STAIILITY- Complete flgeae Se wIthin limited nmwey epeee ean hove- htto landing p0-feet novie fun fll.-t V SUPINE AERODYNAMICS WIng lead 71 56 oaeq ft phie erg eantrol eawfeoee no flutter know process building aircraft fun may taxinq patience times Gyro-i has designed fun fliers fun fliers kit contines time money saving features such - WHEEL GRAPHITE LANDING GEAR AND PIBERGLASS STANDOPPS INCLUDED MO PUSELAGE CONSTRUCTION -2 plm oompoeIte boom PIECE WING DESIGN No jolnte 0g dlhebal ENTIONAL MATERIALS No herd wmtc exotlo materiel TO CONSTRUCT TAIL SIMPACES Eulid over plane JIG DESIGN PROVIDED aircraft kit now available directly Twinn-K Please call further spectications piece order dlRE TAIL PRICE a4770w 13911-1 ST cLsvaANooll 44135~1Y1rLOLJ 11t8995 IWMMP1-loNe 216433-1988 FAX 218267-32W- September 1993 89