LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX AMA Membership125 Academy Aviation Research & Development151 Ace Radio Control154 Airtronics2 American Jr Aircraft Co141152 Argus Specialty Publications145 Astro Flight132 B&B Custom Built Models159 Balsa USA13 Ralph Beck139 Bergeron Enterprises167 Boss Model Fuel144 Dave Brown Products150 Byron Originals47 Ca Ra Products144 Carolina-Taffinder148 Johnnie Casburn Mfg153 Circus Hobbies43 Cleveland Model & Supply Co168 Consumers Guide RC Aircraft Products136 Coverite55 Cox Hobbies85 Curtis Model Aircraft150 D&D Engineering151 DGA Designs158 Davey Systems Corp18 Larry Dodge Aero Inc158 Dougs Hobby Shop156-157 Du-Bro Products Inc5 FAI Model Supply154 FHS Supply Inc4 Flyline Models155 Fiberglass Master164 Fourmost Products166 Fox Mfg Co167 Woody Frantz170 Fults Tooling151 Futaba Corp America23 Gas Model Products148 Gator RC Products170 Carl Goldberg Models22 79 Golden Gate Hobbies169 Gorham Model Products9 Great Planes Model Mfg Co146-147 Historic Aviation19 Hobby Barn128-129 Hobby Capitol Distributors140 Hobby Horn160 Hobby Lobby International6-7 12 Hobbypoxy169 Hobby World Imports155 Holleys Silent Flight152 Ikon Northwest Co170 Indy RC Sales Inc142-143 Jeffla Corp163 Jet Age Model Aircraft Co78 K&B Mfg Co164 K&S Engineering164 K W Enterprises133 Klotz Special Formula Fuels22 Knights Air132 162 Kraft Systems Inc25 Kustom Kraftsmanship137 L&L Model Products155 Lindsey Micro Products154 Lone Star Models45 Luger Boat Kits158 MARCShow133 MACS Products144 Master Kit154 McDaniel RC Service18 Jim Messers Qual Model Prod151 Micro Mark162 Micro Model Engineering150 Mod-Ler137 Model Magic Products160 Model Products Corp152 Model Rectifier Corp Covers 2 & 3 93 Sid Morgan Plans150 Morley Helicopters USA14 Mutchlers Hobbies134-135 National Soaring Society138 Nor-Ray Products Inc155 North Products158 Northeast Screen Graphics148 Old-Timer Model Aircraft139 168 PFR/CM RC Eposition24 PK Products162 Hal Payne Enterprises51 Peck-Polymers148 Penn Valley Hobby Center144 Peripheral Systems Inc149 Robin Pharis166 Pica Products49 Polks Model Craft Hobby126-127 RJL Industries166 Radio South159 Replicraft167 Repla-Tech International158 Jim Roberts Flying Model Aircraft136 Roush Mfg Co160169 SR Batteries159 S&W Hobby Supply140 Sailplanes World163 Satellite City131 Scratch-A-Plane165 Sheldons Hobby Shop14 86-87 Shamrock Competition Imports141 SigMfgCo10-1124 Simcoe RC Aircraft Co21 Standale Aircraft140 St Croix Park Falls158 T&D Fiberglass Specialties136 TGMfg138 Tatone Products Co141 Tidewater Eng & Mach Co4 Top Flite Models Inc1 Tower Hobbies161 US Eagle138 Videotech158 WE Technical Services8 Williams Bros130 Wilshire Model Center130 Windsor Propeller Co78 World EnginesCover 4 Zenith Aviation Publications15 ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX ADVERTISERS INDEX smooth straightforward Since sport model fixed flaps dont expect execute super-square corners Work way up fancy aerobatics carefully Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 plus other contests$550 Ne 423Clued Cralur AC Did-Timer taken 60-power 3-channel AC Two-piece wing optirm easy transport Two sheets$1275 Ne 424Reed Tern FF Embryo Endurance rubber-power fbootplaoe has eptinnul wheels stick-and-tissue delight$200 Ne 426Chlaa Cipper AC Fabuloos 74-in-span Sport Scale flying boot four 10-size engines 4-channel Three sheets no dec$2000 Ne 429Beer E-Z CL Did-Timer Stunt biplane has profile fuselage ones 25 engine 00 Ne 430lreaalde AC Zippy little sporoster 1015 power 3-channel AC Ne 431Leckheed P-36 AC Fun-scale hein-l 5-flier 4-channels Twn sheets $1300 Na 432Pbeealn CL Updated Thunderbird-style Stunter lor 35-40 engines Na 433WetIn Up AC Electric-powered glider 2-3 channels 035 motor spans 52 $450 Na 435TIde N TitlE AC Aerobatic biplane 40 engines 4-channels Great sport flying$650 Na 437KIngfisher CL Prolile Carrier plane spans 40A uses 35 engine$600 Ne 436Cnduer FF Embryo Endurance rubber-power fun ship has big-model characteristics$200 Ne 439Denperada AC flying wing unique negative dihedral flies 4 channels 1 9-40 power Foam wing$450 Ne 446CannIer AC Did-Timer-like new design has hope wing slow easy flights 35 power 3 channels Two sheets 725 Ne 441NA Wit FF Hot small liobbenighl competition ship 15 power designer Harry Murphy$475 Ne 442Lazy Beck AC Big canard sport flier AA-09 power 2 channels Uses loom board parts $650 Ne 444FirebelE AC pusher canard sportlpaltern uses 40 pusher engine 4-channel Has swept-forward loom wings $650 Ne 445Nenailtk Ceegar CL Scale model popular homebuilt won Nuts Uses 21 engine spans 41 $925 Ne 446Ie Cnale AC Electric-powered sport flier 05 motors 3-channels Two versions parasol cabin$550 Ne 447ihA Mine America AC Did-Timer 4A Tesuco model 049 glow 2-channels$650 Ne 449Sehtee CL SportlSlunt plane 40-size 4-stroke engine bulids font easy$600 Ne 451EN Biplau Sealer AC Aodesign sleek 1937 FP biplane 3-4 chunneis 29-40 power Two sheets 5 Ne 452Bee Bee Z AC Quarter-scale spans 71 uses 90 power Four shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation
Edition: Model Aviation - 1985/06
Page Numbers: 88, 89, 90, 91, 92, 171, 172
LAST MONTH covered what makes goad Electric floatplane Now lets cover other details good know about before first takeoff often low flight fairly far out water have noticed glitches radio cured vertical tenna have piece inner Nyrod month Mitch takes look float setup airplane motor/prop parameters wind affects Electric floatplane water authors solutions suggestions should get off good start Part 2 conclusion EMitch Poling 88 Model Aviation Top three pnoos woing rigni o iej aspic sequence loatplane goes through builds up speed takeoff first photo plane barely moving site flat floats water rudder almost completely out water second photo plane begIns Its taxi run rocks back floats submerging water rudder Finally third photo plane up step floats water rud der completely out water again plane verge rotating take off Above Author recharges Aqua Sport another quick quiet flight before work set vertically through run antenna wire think running antenna wire top vertical fin would just well Speaking Nyrod use con trol connections will help waterproof plane Run elevator rudder controls out top fuselage out sides keep spray out fuselage like have hatch cabin top cover cabin completely sheet balsa cutout hatch Leave enough space sides couple rails dihedral-type wings will sit squarely use Radio Shack-type power charge jack charging mounted inside cabin hole covered plastic plug X-Acto #11 con tainer waterproof radio nor use waterprcof box fuselage waterproof enough against spray set up have described plane dunks radio compartment will stay dry time such case pick up tail let water run out nose mount servos servo tape positioning floor receiver off floor too receiver gets wet radio does get uncontrollable strongly recommend fuse motor reason use 20-amp spade-type fuse use fuse have good chance seeing plane upside down motor running full blast trying make like submarineand no way stop wild sight want no sol use fuse fuse will blow plane will wait come radio gets wet take off plastic cases let dry room tem perature same goes motor battery motor fly fresh water no damage wetting fly salt water strongly recoinmend rinse everything fresh water before drying plane should allowed dry room temperature too day enough get everything dry ready go again provide cooling holes power pack motor since water spray would surely find its way inside fly cool climate has no problem convenience ease retrIeval good floating dock just cant beatnone long reaches fixed dock nothing snag launch shore June 1985 89 check battery pack two flights see getting hot pull out let cool before charging Body tem perature ideal Last least buy inflatable vinyl boat retrieval below 170 lb two-man boat will right above get three-man man ratings must have done Munchkins vinyl boats very light easy carry easily strapped top car have given up other method retrieval usually land out middle lake wind blows plane away try retrieve boat way Better yet leave enough power battery can taxi plane Good advice wish did often Speaking power must have least on-off control simplest toggle switch run its own servo tripped full throw either rudder elevator use either full-down elevator Left Cut out cabin hatch after cabin has pianked over raiis cabin top support wing Porward hole Jomar Sd throttle heat sink Right Elevator rudder Nyrods should exit through top fuselage keep spray out 1/16-in music wire IlTo servo hole Structoplast Ilinlong Slip tubing over toggle handle Toggle switch Adjustable on/off power switch operated full throw elevator rudder separate servo try drill flatten toggle handle direct servo connec tion spring inside will destroyed switch will no longer function properly tubing 1/8 10 full-right rudder favor separate servo though have used other method years sometimes quite hard tell what power doing unless have separate on-off servo have battery pack count cells can use series-parallel switching get high low speed see diagram works very well however off middle way switch made sometimes hard tell motor off low Low does give long motor run times since parallel setup doubles capacity pack An efficient plane can cruise low usually low gives slow steady descent best solid-state throttle recommend SC-l marketed Jomar Products 2028 Knightsbridge Dr Cincin nati OH 45244 very efficient smooth have some wiring also may want use prop little larger use throttle go up about pitch diameter recover slight power loss due voltage drop controller Joe Utasi wrote excellent article throttle Model Aviation wish build own can buy parts 90Model Aviation Low flights out over water often produced glitches radio author cor rected problem construcing vertical whip inner piece Nyrod threading receiver antenna up through before letting trail out behind model Wheel collar Jomar save little money Mount throttle windshield keep out spray gets wet stops working will fine after dries Now lake ideal flying spot having floating dock beach no trees near shore Never fly plane behind ie over land trees will reach out grab know Ive proved Some locations have dock pilings suggest loop string will go under wing rubberbands lower plane water hook raising out water area distance dock water good 4 ft too far reach catch loop hook string using transmitter antenna may help Early morning flying best usu ally no wind water calm enough wind waves catch prop plane taxiing condi tions too rough beginner Lets assume nearly calm conditions mild breeze can take off either wind directly downwind downwind takeoff would necessary wind blowing behind shore wouldnt want take off toward shore trees waiting eat plane Never try take off crosswind Ten times out 10 wind will dump plane its nose over its back lift-off Lets assume ideal upwind take off Turn full power As soon plane gets little speed give down elevator Down needed get out plow stage step stage think floats being water skis Once step concen Battery #1 SERIES-PARALLEL SPEED CONTROL Parallel connection low speed Motor Switch B 41 gs Series connection high speed Center off s ery ix small circles representthe six lugs SW 810-amp DPDTcenter-off toggle switch determines whether cells connected motor either parallel series low high speed charger will connected block labeled C will charge both batteries simultaneously however switch high-speed position series charger output will have 24 volts proper charging switch low-speed position parallel charger output should set 12 volts Switch B manual on-off switch must turned off charging otherwise current charger will spenttrylng run motor instead charging cells throttle lead Toggle switch Add wires Optional an-off servo bypass extra power Dia VI Black LIZkn 9 Motor plug4k Red e pointed end plus Black Battery /plug Automotive spade fuse 20 amp yellow Install female spade lugs easy in/out MODIFIED JOMAR SCi WIRING FOR ASTRO OR LEISURE HARNESS servo on-off bypass June1985 91 SCiRed e keeping plane tracking straight plane has reached its maximum step speed no longer appears speeding up use some up-elevator break loose water Once off water concentrate keeping wings level no banking let build up some speed about 100 ft climbout Feel free use some downelevator first 100 ft flight keep plane climbing too much last thing want yank up max climb will stall fall fly full-scale floatplanes Taylorcraft Cessna 172 same procedure full-scale want get safe flying speed go altitude way Electric floatplanes have almost same feel full-scale ones No wonder have very similar powerto-weight ratio like flying realistically circuit usually enough stunt ing mild dive will give enough speed rudder rolls loops Touch-and-goes perfect Turn off power touch down little fast plane skips off water turn power climb out hardly lose speed looks beauti ful can climb out immediately touch-and-go done way can crosswind wind mild dont let plane slow down plane does slow down dont touchand-go crosswind Now landing Always land either wind straight downwindnever crosswind Try leave enough power reserve fast taxi step run dont reason give advice have water rudder wind blowing parallel shore trouble have little power left plane will insist weathervaning will have wait drift end lake will have retrieve boat have water rudder often cannot overcome weathervaning low power may inthe same situation have plenty power left run step have no water rudder fast taxi plane will overcome effects wind com Continued page 171 92 Model Aviation though charger plug hole located find its way author suggests using ci aqua upon auring T55t taxi run NOtO amuminum puma tne wunoanmema mis lathe heat sink Jomar Sd throttle located keep well clear spray 1ning upiurupunuci landing Besuretodo itwhlleyou still have enough powertoover come weathervaning might able taxi back under planes own power float setup critical Electric plane trying rise off water Author suggests use mounts shown easy bend correct position mInI mum drag water Dont put cross braces reduce shock-absorbing qualities ADVERTISERS INDEX 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Landings smooth take offs plenty wing area good glide tail area large enough good controlling right touching down Elec Floatplanes/Poling Continued page 92 ments also apply downwind taxi however quite difficult down wind taxi unless can get some speed wind blowing toward shore no problem Just turn off power let model drift wind blowing away shore plane automatically points toward shore low speed will get home main problem wind parallel shore too bad because wind parallel shore ideal takeoffs landings pilots viewpoint much easier see control takeoff plane running across field vision running straight away you lake keep mind way wind blowing ready either ICOMPLETE THIS FORM IAND ATrACH MAILING IFROM RECENT ISSUE LET US KNOW WHERE YOU ARE GOING I When move please let us know advancesix weeks required change address Attach currant MA mailingI Ilabel check appropriate box mall Subacrip-I I tion Dept Modal Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment U NEW SUBSCRIPTION 0 cHANGE OF ADDRESSI Non-AMA subscription rates $1800 12 months US possessions elsewhereI Including Canada Mexico $2400 US Schools $900 US Libraries $1350 I I ADDRESSI I____________________________________________________________[v32][b1741305910500]] CITY/STATE _____________________________________________ zipI June1985 171 S 76Manta 250$500 FF 1/SA competition model has manta-ray-shaped wing spans 43 No 477MandarIn$325 CL Sport Stunter 15 power spans 35 No 478Buttercup$300 RC Cute elfin sportster spans 27 uses 2-channel pulse-rudder No 479Four-Stroke RoosterTwo sheets 0 RC Sport/Aerobatics plane spans 85 uses 90 four-stroke engine Ne 193 SiBielte CL Stunt model McDonald winner 197619801982 FAI World Champ$ 375 Ne 239Blue Bird: AC Ken Willards fnrmation plane 4-channel 10-power 5 Ne 262Crashmanler CL Crash-proof trainer two sizesi 5-30- 35-40-power 5 Ne 299Bee Bee Sr Spenlaher AC 1-scale llaffke 91 power Prototype span 30ff Two-and-a-half sheets $1175 Ne 302Mliii P16 AC Sarpolno 049 docted fan sport flier 2-channel Balsa wings tail tone stroctore$275 Na 3101930 Fleet Biplane AC Sport Scale 35-40 4-channel Wingspan 56 % scum Two sheets $825 Ne 314Drake t AC Ken Willards flying boat 3-channel 15-power Fly trom land removable gear$375 Ne 326Tayher Cab AC Don Snulrs Schoolyard-Scale 049s 2-3 channel Spans 50 in$350 Ne 332Zephyr AC Small 2-channel glider hand-launch tow thermal slope snaring$200 No 358Places FF Indoor Easy B Aabber-power contest-winner W Van Gorder6190 No 363Culiala 62 AC Fly sleek Nats-winning Sailplane AMA Mod Std Unlimited classes$750 Ne 396LIner 266 AC Sport Scale replica et championship Aerohatic flier Uses 40 power 4-5 channel Two sheets$1075 Ne 399Bee Bee B-i AC lfaffkns latest 1-scale spans 75 weighs 15 lb flies 90 larger Foor sheets no doc$2225 Ne 414Electric Sparky AC electric-powered fun flier forDS motor 3-channel AC scaled up 1939 robber-power favnrite$850 Ne 422Sceeler AC Two-Meter Sailplane has won Nats event 19821983 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shoots$1600 Ne 453Smeeltile Prelle CL Profile reridiline Bob Palmers super-Stanter early Fifties fur 35 power$550 Ne 454Sweel P-30 PF Neat stick-and-tissue Duidoor Bobber P-3D-class model contest-winner$200 Ne 456Ill-Tech 2001 AC Ducted-tan futarislic-lonking canard 25-size engines Built-up construction Three streets$1175 Na 457Speclra AC Eleclric-power 05-size motor uses 3 different wings sport soaring aerobatics Ne 456Olealless CL Profile Carrier 15-power events Two sheets0575 Na 459Sky Perealt FF Aubber-power old-timer dasigned Jee Ott 1932. . $3 00 Ne 4604-40 AC Shoolder-wing sport flier br 4-cycle 40-size engine 4 channels0650 Na 461Trioler Bemnienmeer CL Famous untlapped Stanter late Forties Uses 35 engine6650 Na 462PemBie PE FF Jumbo Bobber Scale WW Italian observation plane6400 Ne 463PletylmelanhehIlen VI AC 4A Pylon racer uses lots lion ply built-up structure strength lightness6475 Na 464Sandiacer CL 4A sport flier all-sheet-boise can use Tee Dee 0496325 Ne 465Bise Mint AC Fun-fly sportsten 40-size engines spans 52 Lightweight stroctore$700 Ne 466Cmpeiller CL Stunter 60 power has 850 sq wing area $575 Ne 467Mci Spent FF Aubber Scale deolgo woo 83 Nuts designer Sruli Wingspan 26 in6250 Ne 466Smeether CL Stanton 29135 power Design beond hybrid SmoothinlNobler$675 Ne 469Dee Kichet AC Sport Scale rendering Polish humobuilt pusher Spans 75 uses 40-size 4-cycle engine Four sheets .$2075 Ne 470Slreker AC Mid-wing sportster uses 40/45 tour-stroke engine spans 50l tail-dragger $650 Ne 471Megan Aelen CL Profile Stunt trainer spans 54 usno 35/40 engine Flapped wing$575 Ne 472Paracraft AC Craft has tiesibie paraf oil wing uses 3 AC channels 60 engine$550 Ne 473Tacem AC Sport scale turboprop trainer spans 66 uses 60/75 engines Three shoots 250 Ne 474Pacer 15 FF Nordic A-i Towline Glider won 1983 Word Champs$500 Na 475Geephynlcak CL Slow Cowbat model uses geodetic wing cooslruclion 36 engine Two-sheetplan has parts patterns$400 0 v6 050 n cri 0 0 ooo 60 o 05 - o C-. CO 0 qs 050 0 C ma C V 00 II 0 V 0 00 Va c 005 U crr eec ME STREET CITY 0 STATE 15 Circle numbers plans wish order 193239 326332 422423 432433 441442 451452 459460 466467 473474 262 358 424 435 444 453 461 468 475 299 383 426 437 445 454 462 469 476 302 386 429 438 446 456 463 470 477 Plan price leclades first class pestege US delivery Air Mail ever 300 miles orders outside US lease add $250 Air Mail $125 surface mail 310 398 430 439 447 457 464 471 478 Make CbeCk money order payable US funds Model Aviation CIO AMA 1810 Samuel Morse Dr Reston VA 22090 Please allow 3 6 Weeks delivery Please print carefullyEnclosed $____________________________________ ZIP easy takeoff harder retrieval harder takeoff easier retrieval Oh well nothings perfect What takeoff just isnt making common problem skid plane does track straight especi ally just ready take off skids sideways little goes speed happens try lift off plane skids turn off power let stop try again skid particularly troublesome downwind takeoff cause plane wants weathervane 1800 V-bottom floats might less prone skidding will trade glassywater takeoffs time skidding occurs upwind takeoff may actually little crosswind turn off power let plane weathervane try again Nev er try take off skid will dump plane dont get off couple tries check float setup should parallel little toe-in ie fronts floats can little closer together rear floats float bottoms can either flat ground canted inward slightly such outer edge off ground inner edge touching use very simple float mounts just two music wire upside down U-shapes no cross braces struts recommend setup very easy adjust springy good shock absorption can bent out alignment hard landings though should checked time time Please resist temptation put cross struts bracing struts add weight drag rigiditywhich stresses fuselage plane lack shock absorption skid problem has cured plane still will lift off front floats may 00 1 down relative stabilizer Check does cure problem shim-up front wing 3/32 time else fails hand launch see plane flies Check overall power alignment flops back water 314there isnt enough power 41 4better check weight motor battery 431wiring general parameters 05440size motor 7-3 gray prop 74 Rev-Up Top Flite weight 42 oz less rpm 11000 better 15-stze 458motor 5 lb less 8-4 9-4 prop 4659500 rpm better 9-4 11500 472better 8-4 getting close 479these numbers performance what want experiment props lot difference between dif ferent brands same marked diameter pitch like Top Flite props general flying though Rev-Up Cox ones seem efficient though can very hard find Now know know about Electric floatplanes have flying eight years have just saved yourself lot cutting trying Write care Model Aviation Fly better electrically fly floats 172 ModelAviation