THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1
Edition: Model Aviation - 1991/04
Page Numbers: 44, 45, 141, 142, 143, 144
THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1
Edition: Model Aviation - 1991/04
Page Numbers: 44, 45, 141, 142, 143, 144
THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1
Edition: Model Aviation - 1991/04
Page Numbers: 44, 45, 141, 142, 143, 144
THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1
Edition: Model Aviation - 1991/04
Page Numbers: 44, 45, 141, 142, 143, 144
THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1
Edition: Model Aviation - 1991/04
Page Numbers: 44, 45, 141, 142, 143, 144
THIS MONTHS TOPICS Electric Connection Service 2 Some missing text February column Electric events Vintage RC 3 Electric installations Part Four 4 Personal closing thoughts Note See correction page 20 THE ELECTRIC Connection Service has fering month Dick Hinekle 6406 E 140th Terr Grand View MO 64030 Dick eager find others area share joy Electric brings know out therejust let Dick know tell im Bob sent ya Somehow some way e text intended Februaty issue did appear final version column Since suspect read ers confused least some omis sion Im including lost words two sections follow Last-minute space consider ations magazine went press forced us exposed ends conductor wire strands twisted tinned 20- 30watt soldering iron shown Feed elec tronic-grade solder wire/tip interface until wire end fully coated Tinning jack terminal similar tinning wire end Note jack temporar ily held 1/-in ply plate positive ter minal lug shown being heated negative terminal left third lug 12 oclock position cut off unused delete portion February RC Elec trics column Bob mentions Model Avia tion regrets inconvenienceEd October 1990 Electrics column requested write tell types events prefer Electric meets Specifically whats choice formal AMA contest events fun fly ones Judging reader response Id have suppose no interested anything al ways knew Electric fliers low-key funloving people never expected hear nuttin could go extreme conclude Electric modelers simply arent interested meets would odds steady growth both number meets num ber modelers attending Alternatively Three different fuse connector styles shown two wire emerges right angles fuse body cut ready-made wiring harnesses bot tom homemade assembly using individ ual slip-on style connectors How-to details coming up future column ATC auto motive-style fuses readily available five-ampere steps up 30 amps could mean folks like meets just dont get charged up over eventsof kind fact 1990 KRC meet some prizes went un claimed cause no interest See Jan uary 91 Electrics column Perhaps meets struc 44 Model Aviation Radio Cono Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Bob highly recommends using externally accessible charge jack since allows easy con nection charger lead model Shown Astro charge jack mating connectors uses jack Part No 4030 mounts ls round hole model surface mating plug Part No 4029 costs $250and well worth Cut offPositive ive 0 REAR VIEW Astro PIN 4030 solder wire jack lug lay tinned wire end tinned lug bring iron heat reflow solder joint cooled slip previously installed Du-Bro green heat-shrink tubing over wire-lug joint neat finish WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALM SHEETS 36 48 30 BALM STiCKS 3648 1/161/410 1/163/811 1/16x1/215 3/32x1/412 3/32x3/813 3/32x1/217 1/8o1/809 1/Bo1/41218 1/Bx3/81319 1/8o1/21824 3/16o3/161219 3/163/81821 3/16a1/22231 1/401/41826 1/43/82128 1/4o1/22232 1/4x3/43445 1/414257 5/1605/162330 3/803/82939 3/801/23349 3/8x3/44458 3/8x18473 1/21/23855 1/2x3/44866 1/2o16082 5/805/85270 3/403/47598 i eI KW i 14baEEI4hIEEudbUEE w BALM TRIANGLES 36 4425 383030 35 343445 55 BALSA PLANKS 36 90 28 329 4283 11/23302 11/204398 22231 23338 24470 303515 34716 TAPE RED SHEETS 36 1/4205 14380 3860 38390 123120 LONE STAR EPOXY SocList 999 S rn/n600 15mm600 30 rn/n600 CUSTOM CUT CONTEST BALSA Sheets 0 Sanded Close Tolerances AAA Grade Dried ped 100% serious modeler want performance must try 4-6 lb balsa * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 48 18 1/81725 18 1/42028 1 8 3/82232 3163/162438 14 1/43450 1/4 3/84005 1/4 0124560 3/83/84989 381/26077 12126688 /2 347097 BASSWOOD48 3153/1626 3/161/430 3/163/838 3161/246 3/163/460 1/41/442 1/43/849 1/43/480 3/83/890 3/81270 3/83/400 121/200 123/406 BUNDLEDEALS 20-1/1 6o3o36699 20-1/1 6o4o361035 20-3/32336875 15-3/32436955 15-1/8x3o36750 10-1/8436695 1S-3/1 6x3o36940 10-3/16436835 10-1/4x3x36655 10-1/4x4o361050SPRUCE TRIANGLES 1 0-3/8x3o368902/63/6 5-3/8o4366551/212 5-1 /2o3x3654033~ 5-1/2o4o361110 10-3/32448885 5-1 /8x4x46500 5-3/1 6448600 5-1/4448645 36 47 64 81 LflTPLY48 1/8x6175 1/8x12350 1/46275 114x12550 HARD MAPLE 1 4 3/8 3/83/6 3/8 12 3/6 34 12 IGHT 4-6 LB WOOD30 1/32382 1/20362 1/16362 3/32374 1/8391 2/163106 1/43126 3/93150 1/23190 3/43300 13428 1/16498 3/334119 1/84138 3/164167 1/44188 2/84286 1/24386 TRAILING EDGE 36 14132 5/1611/439 3911246 12270 INSTANT CL UE 1 oz Thick300 1 oz Thin300 2 oz Thick550 2 oz Thin550 lB 40 45 59 68 BIRCH DO WELS 36 1900 31611 14/4 51625 3632 IPLYDIRCH 48 1164x12836 1/32x12475 1/16x12475 uSd2496 S PLYEIRCH 48 3I32x12700 1/8 12775 3116x12625 1/4x12625 318x12725 112x12900 GROOVED LG MOUNTS 82 ladieS 3/8o3/411/8/45 3/80 3/415/32145 1/23/4/3/16/00 LONE STAR MODELS Cont e Handling Charge pay UPS Add $400 COD $500 extra PP APO FPO 1623St Lubbock TX 79412State Wo accept VISA MasterCard personal checks COO 6% tan Tenas US currency Mm wood order $1000 Tern tured fly-ins no events no prizes would just acceptable know sure Electric fliers like gatherand show-and-tell peek poke others planes flight line Maybe thats thats needed After hobby fun andfun can actually happen com petitive goals Its matter personal prefer enceand majority interest Now may please have some reader response matter Vintage RC October 90 column de scribed newly constructed electrified Trixter Beam rudder-only escapement control readying Labor Day weekend Vin tage bash Selingsgrove Pennsylvania meet could very well have high point summer never made due cir cumstances described January 91 column good time however folks chance see well Beam flies vintage plane turn alr Lehigh Valley Pennsyl vania Burlington County New Jersey KRC meets Anyway October column caught atten tion several readers Some folks requested formation about custom circuit mentioned uses modern radios drive escapements have readily reproducible prints cir cuit reader interest continues Ill set about develop can give try Inciden tally circuit connects contemporary radio receiver vintage escapement actuator isnt limited use Electricsits useful fly wet power must say Ive great deal enjoyment flying escape ment Electric past summer Im sure would welcome same opportun ity Prior Vintage meet also work ing Esquire intention flying Mighty Midget Galloping Ghost installation also operated contemporary radio system Though havent completed project hope revive someday suspect some may interested well its successful Ill pass info along too Now just case some may wonder ing earth anyone would like flying such old junk its same reason would fly allfun Its matter individual perspective given time Modern Electric system installations going mini-series showing different ways whys make custom installations Electrics continues Part Four month idea help roll own con fidence might want dig out last few sues have earlier chapters handy read Last months installment discussed illus trated typical wiring harness model electric systems particular attention arming switch Remember Electric installation con sists motor battery everything else stuff need connect month well take look another compo nent everything elsethe optional charge jack Im absolutely positively sold using ex ternally accessible charge jack planes shown photos last month Actually such jack two ways folks con nect charger allows easy connection charger lead model just plug charge pull out youre finished alternative get battery area model disconnect battery connector connect mating charger disconnect finished reconnect model wiring close up whatever access opened get connector first place Whew Sometimes seems people use lat ter method use former store-bought systems sold separate charge jack Another reason folks like remove batteries between flights cool down change new ones have undo model wiring connectors anyway cooling necessary prefer job small external blower Also unless Im experimenting never remove battery substitute another Finally simply dont like idea messing tidy installation putting wear tear connectors Thats Electrics have charge jack mounted model surface Please note matter personal preference ba sically nothing wrong other approach photos shows charge jack mating connectors wiring connections Astro has supplied parts its flight sys tems chargers since early 1970s re cently stopped doing Made Switchcraft high-quality plugs jacks have proven ex tremely reliable over many years hun dreds charge cycles lament Astro no longer furnishes heartily recommend dont care remove batteries charging would like convenience su per-easy charger0model interface Taking closer look jack part mounted model see three solder termi nals Only two used third can cut off wire cutters near plastic connec Continued page 141 April 1991 45 1/16233 3/32240 1/8243 3/16249 1/4256 1/32337 1/20337 1/16o337 3/32344 1/8355 3/16363 1/4o375 5/16387 3/8390 1/23114 3/43170 1/16458 3/32472 1/8482 3/16496 1/44115 3/84170 1/24235 MATCHED SHEETS 332 4 / 94 3164 144 49 31 58 37 74 45 84 55 98 61 115 128 71 160 200 76 48 97 56 109 66 126 75 139 84 235 144 273 200 42 100 108 1 20 31 BALSA HOT LINE Cmii f5061 745-6394 10am 6pm Central Time SPAN AREA 4-C 2-C WT LOAD SPAN AREA 4-C 2-C WT LOAD Quality Design aircraft feature specially designed symmetrical airfoils correct moments light wing loadings Advanced aerobatics crisp precise including point knife-edge maneuvers wide speed range allows excellent slow flight stability Looking adventure honest performers Solid Engineering simple airframe builds straight strong light very few parts quick easy balsa skin technique followed balsa leading trailing edges results foam core wing first-timers can build true Custom /8 x 1 1I2~ ailerons fit airfoil resist torsional twist improve response 56 700 60-91 40-61 6-7 20-23 56 630 40-53 40-45 51/453 19-21 Premium Parts Hand selected contest quality balsa edge-trued before parts cut perfect fit during assembly Precision machined parts include router-cut tail slots pre-drilled wing dowel hole former F-2 An extensive quality hardware package includes polished T-6 aluminum landing gear Kleft axles Quick Easy Construction Clear plans detailed step step instructions construction photos speed assembly modelers complete easy building kits ready cover 8-10 hours Simple proven construction methods handcrafted parts fit insure accurate assembly enjoyable project know wane Chem o flyl 1731 NW Madrid Way Boca Raton FL 33432 367-7744 Ask see local dealer available order direct Call anytime Free catalogue z elevator rudder servos stalled servo-mounting tape directly /6-in sheeting inside cabin area pushrods old-fashioned kind made A-in balsa sticks wire ends attached thread glue will take bit juggling get before install windshield put slots sheet balsa pushrod exit plates before glued place will find fishing pushrods through will much easier did stuff wrong first time Anyhow hook up servos pushrods control horns Set control throws about rudder el evator rigged ailerons ride /16 high servo neutral fools model thinking has lots wash-in wings final trim items can added now used black trim sheet lightning stripes door outlines wing walks Cut light sheet clear plastic wind shield fit place Access holes fuel filler needle valve will have cut will exit antenna radios OntOff switch Details De tails Install rest radio equipment Move around Staggerwing balances shown plans Mount engine check cor rect amount down thrust Before set out flying field check model over warps correct find first few test flights suggest use old Free Flight formula Long tall grass calm weather no observers put prop backwards absence ob servers will help confidence backwards prop will allow engine wind up its full power overpow ering Staggerwing its first few flights youve managed keep models weight down Staggerwing snappy flier Mine used micro-sized radio ser vos 250-mAh battery pack weigh 10 oz ready fly Staggerwing fast-flying model dont expect floating glide can stretch glide though cause slick clean hope have much fun Staggerwing have fun remembered put aileron con trol horns top ailerons Tell envious friends order own set plans get started Electrics/Kopski Continued page 45 tor base remaining terminals wired polarities shown illustration like use two-conductor 20- 22-gauge flexible stranded speaker cord so-called zip cord wire adequate carrying charge 56 630 40-53 0-45 l/453/4 19-21 HYBRIJET ENGINES HJ-225 BEING INSTALLED IN BYRON MIG15 DIMENSIONS Combustion chamber Diameter Tail Pipe Diameter Overall Length Weight 5 inches 35 inches 46 inches 4 lbs Information Package Video Cassette $1995 HYBRIJET ENGINES B PO Box 715 Cornville AZ 86325 602-634-9232 April 1991 141 PRECISION MODEL PRODUCTS Made n USA BARSTOCK ALUMINUM SPINNERS Part No Size 11-150-B 1-1/2 TT-175-B. 1-314 11-200-B.2 11-225-B . 2-1/4. 11-226-B.. 2-1/4FAll TT-250-B. 2-1/2 11-251-B. 2-1/2FAI .. 11-275-B. 2-3/4 11-276-B /4 FAt 11-300-B3 11-301-B 11-325-B . 3-1/4 .. 11-350-B3-1/2 TT-375-B 4 TT-400-B 4 Retail Appros Price Weight $1395 058 oz 1495095oz 1595100oz 1695160oz 1895150oz 1895 190 oz 2095 170 oz 2295220oz 2495200oz 2695260oz 2895250oz 3695340oz 4995470oz 5995520oz 6995570oz 3 Pieces Cone Back Plate Retainer Screw Note 3 4 Blade Spinners Available Sizes Add $300 Per Spinner Part NoSize 11140-A .1/4-28 TT-147-A 1/4-28/7mm TT-610-A 0mm 11-710-A 7 x 10mm 11-516-A5/16-24 11-518-A 5/16-24/8mm TT-810-A 10mm TT-825-A8 x 1 25mm 11-375-A3/8-24 rT-125-AlOx 125mm Retail Approx Price Weight S4 95 oz 495 1 57 495063 oz 4 95082 oz 495 076 oz 495 0 76 07 495076oz 495 z 595 ll7oz 595 115 07 3 Pieces Nut Washer Machined Bushing Add $350 Shipping Handling Prices subject change notice ROMCO MFG INC OX 836 SOUTH HOUSTON TEXAS 77587 713 943-1867 current over few inches needed readily available audio stores auto stores variety stores Radio Shack etc neat compact easy use Speaker wire usually always has some kind built-in polarity marker identifica tion typically takes three forms Some man ufacturers use two differently colored conduc torsone copper tin-colored Other brands use molded ridge plastic insulation conductors Still others put color stripe insulation conductor makes no difference two conductors marked plain choose positive lead negative tong wind up correct polarity connections between charge jack battery Please refer March 1991 column Connecting wire jack terminals easy Carefully separate two insulated wires slicing intermediate web about 1 inch Strip about insulation off wire end taking care cut wire strands cut some starr over Twist exposed strands conductor tightly help hold collectively place tin solder coat ends illustrated photo After cooldown slip Du-Bro green heat-shrink tubing over wire Keep tubing far away bared wire ends possible until after following solder opera tions completed Tin solder terminals charge jack helps hold jack temporary scrap /8-in ply wooden plate shown latter held vice clamped table Lay tinned wire end flat against appropriate tinned solder ter minal use soldering iron reflow sol der Try make neat smooth com pact quality joint Note wire can rest either inside outside solder ter minal Install second wire same way joints cooled inspect soldered areas care fully stray wire strands solder balls could short-circuit neat clean soldered wire attachments whats needed Slip heatshrink tubing pieces over solder terminal joints Generally snug enough fit wont need shrink tubing afterward heat shrink such insulating sleeve find hot air covering gun does great job Outfitting charger output cord mat ing plug easier Just cut off whatever connectors presently place cord follow what follows Note charger Out put cords often made conventional 18gauge household zip lamp cord Ive seen ones individual insulated output wires well Separate two conductors shown about 1 cut negative wire % shorter positive Youll have determine conductor what polarity isa prob lem seek out some help Strip both wires tin Unscrew plastic barrel metal plug assembly slip plug over charger cord threaded end last Tin two solder termi nals plug negative shorter wire con nects longer two solder terminals positive longer wire shorter terminal Lay tinned wire ends time tinned tugs reflow solder Note no need bend over two pointed splines negative terminal chanically grip charger cord real pur pose way wire should eventually * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No 202 Air Cleaner Fine $275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 PkI2 Inserts Fine $239 FITS MOST ENGINES 25 UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc po Box 3786 Center Line Mtchigen 48016 lAdd $250 shipping igan residents add 4% sales taxi 142 Model Aviation PROP NUT ADAPTORS V Impact Engineering 2100 Stonehill Court Arlington Texas 76012 817 261-8130 FAX 817 275-8825 PNEUMATIC BRAKES S 2-Stage Clamp User Setable Drag Low Proffle NEW UNI-FRAME CONSTRUCTION CLAMP BLOCK STRUT MOUNTING UP & DOWN Y-BLOCK LOCK SPRING DOWN AIR DRIVEN BOTH DIRECTIONS BRASS BEARINGS NO PLASTICS OR CASTINGS LOW PROFILE BACKLASH ADJUSTMENT CONTACT YOUR LOCAL DEALER OR WRITE IMPACT FOR MORE INFORMATION RT9O UF FULL SCALE aib] 7J 0 LJr RETRACT SYSTEMS NEW WHEELS 225 * 3 * 4 * 5 * 6dia 0 * Scale F4 Machined Aluminum Hubs Lightweight Molded Tires Rib Detail Super Realistic Covered Retainer Matched Brake Application break solder joints takes years con nection readily repaired youre finished soldering visually spect make sure no stray wire strands other contact between two wired terminals complete job simply screw plastic bar rel back onto threaded plug body Let repeat safety caution sure re main aware polarity throughout wiring soldering processes described above else series Following illustrations photos given month last will help sure accuracy success Fuses As have previous columns se ries strongly encourage fuse Electric installations Three different types connectors ATC-style auto fuses shown photos type fuse use Electric models hence Id recommend Ill never tell some thing wouldnt Being flat plastic encased its functionally mechanically much suited purposes classic tubular glass-bodied type thats used decades auto electronics applications Three styles fuse connectors shown photos use individual slip-on kind wires emerging line fuse terminals bottom photo read ily available assemble own sys tem March 1988 RC Electrics column discusses how-to Ill have updated upgraded version near future Incidentally seems no specific commonly used name individual slip-on connectors term Ive seen disconnects basi cally geneticand feeble fuse connectors wires emerging right angles fuse terminals top photo cut store-bought wiring har ness Actually individual right-angle connec tors work very well may difficult find some parts country Ive seen some right-angle metal connectors marketplace Ive never seen associated tightangle insulating booties Since Id never use such connectors fully insulating dont use em single molded fuse holdercconnector middle photo least favorite kind Though shown cut ready-made electric wiring harness connectors read ily available auto stores strongly recommend against using Theyre quite bulky fuse fits much too tightly fact Ive ap ply enormous force remove fuse suddenly jerks free hands can end up battering bludgeonlng very model fuse designed protect Besides short rather stiff pre-installed wires simply best suited custom Electric installations next month personal level offer another sincere thank-you warm sympathetic cards notes letters reaction January column Today December 29 Im still re ceiving mail kind thoughtful readers warmth encouragement youve shown daughters will remembered Also wish again apologize lack response reader letters over past half year hope intend resume answering mail near future youve written received no re ply please forgive please bear MA no ill will know Ill never able catch up past mail will try hard soonto accommodate incoming mail can also tell although has 2I4 Box 1063 Lorain Ohio 44055 Phone 216 282-8354 PEANUT SCALE Piper Vagabond Piper Cub Stinson 125 1924 Farman Outdoor kits each. $795 OUTDOOR PEANUT Super Scale. $795 NEWI Micro X Hornet P-30.51395 SPORT SCALE PC-6 Porter Taylor Craft Stinson Voyager Rubber CO Power Kits . $995 __________ SPORT MODELS An Embryo Model 18 Span designed winl beginners experts. $895 HARD-TO-FIND ITEMS Early Bird Tissue Antique Aircraft$795 True Olde Japanese Tissue 10 3 colors$995 Japanese Tissue 12 6 colors8695 Microfilm $495 Glue $195 Solvent $175 Plan Service over 17 Scale Sport Scale & Peanut Scale Rubber Strip 020 thru 085 ze $250 3/32 thru 5/32 .. size *275 Winder 61 $695 Mark 161 5 Complete Line Brown CO Motors Balsa Wood Outdoor & Indoor Sheets & Strips Add 10% Postage ostage $250 COMPLETE CATALOG April 1991 143 U_______________ D&J ELECTRONICS 900 Lucy Road ll Ml 48843 546-2644 service makes R/C equipment utilizing state art electronics Spectrum Analyzer Precision Frequency Measuring equipment True 1991 Standards endorsed AMA & RCMA Transmitte Sticker Program FCC LicensedSpeed Control RepairsQuality Service Transmitter Checks Only includes GOLD/SILVER sticker$400 Transmitter & Receiver Calibration$2400 Frequency Upgrades & Changes crystals extra$2900 Bench Time Repairs per hour$2500 Transmitters service will receive AMA/RCMA sticker ADD $500 FOR SHIPPING & INSURANCE TURN AROUND TIME TWO WEEKS OR LESS us___VISA/MASTERCARD ACCEPTEDCOD building season eastern Pennsylvania quite havent built anything newa further indication personal situation far normal effect Im well behind Id normally hobby-related things other things life well Much has suf fered wondering what about please see January 1991 column Happy quiet landings everyone RC Scale/Benjamin Continued page 47 chose modify Porterfield yet again order bring up competitive stan dards As am aware good Scale kits market would suitable electric power substantial modi fication choice rebuilding Porterfield proven itself good reliable airplane starting scratch As flown competition Porterfield about 90% original its sole remaining sig nificant debt its Astro Flight origin very light structure As learned Northwest Scale Masters Qualifier Farra gut State Park Idaho indeed possible carry quest lightness too far chose use SR Magnum 1250 cells motor battery interest l0-oz weight saving afforded over SCR 1 200s Although SR Magnums good cells used low current de mand applications de signed didnt work well 25 amp-plus max current draw geared Astro Cobalt 25 judicious use throttle motor pack gave out just short completion flight presenta tion two out four rounds managed finish 11th Expert left Farragut lot questions After dust settled reinstalled 14AERO L-39 ALBATROS GLtDER Wingspan 52 lage 42 AirfoilMod Eppler 205 ht48oz Glass Fuselage heeted Foam Wing Stab Glass Canopy Frame Clear canopy ed Plan $22500 Tip Tanks $1500 Extra VERN HUNT 6766 Hwy 0 Hartland WI 53029 14141 966-3528 cell pack 1200 mAh SCRs some what cautiously went out test fly neednt have worried Although air plane gained about 12 oz last re build SCR cells raised other 10 oz new gross weight 6 lbs 14 oz just did present problem really could detect degradation handling characteristics airplane fact might suspect little steadier rough air Several weeks practice flying later took airplane first Island Classic Qualifier Whidbey Island Washington Flying 1200 mAh SCR battery winds about same order experi enced Farragut moderate annoyance le vel about 15 mph Porterfield man aged tie top static score 9625 placed third overall qualify Mast ers Anticipating Dallas might windier Washington knowing four flight lines would use wanted yet duration Conferring telephone Larry Sribnick SR Batteries con vinced SR 1800 Magnum cells what needed cells weigh order piece SCR 1 200s assured would handle heavy current demands Co balt 25 well 5-amp charge current point deep de cided go broke went 16-cell pack assuming basis past experi DO IT THE SAFE WAY START YOUR ENGINE FROM BEHIND THE PROPELLOR WITH THE SAFE-START ADAPTER Patent Pending Designed mount starter field box No reaching around spinning propellor remove glow battery adjustment carburstor face never over propellor Easy use Engage spinner starter drive washer give slight downward pressure activate starter downward start insures field boa wont move Mount SAFE-START high enough match height aircraft Easy installation field hoses Regular SAFE-START up 90 engine JUMBO SAFE-START 120 engine Introductory Price Starter includedl Regulgr SAFE-START 3495 plus $300 postage/handling Jumbo SAFE-START 4495 plus $300 postage/handling Check Money Orders No COD Make checks payable SAFE-START Mass residents add 5% sales tax Manufactured SAFE-START ADAPTER 6 Dewey St Maynard MA 01754 Telephone 508-897-9591 144 Model Aviation FINGER SAVER INC PRESENTS Patented Safety Retainer No damaged fingers Eliminates need helper Allows complete freedom START & ADJUST plane ALONE High quality steel Lightweight compact MUST flier Dealers invited NOW ONLY $1995 s&h FL res add 7% tax FINGER SAVER INC PO Box 1416 St Petersburg FL 33 73 1