Radio Control: Electrics

LAST MONTHS column included comments regarding reader letters wherein thrust help help Among other things poked some fun common kind letterthe please tell everything need know get started kind hope point got acrossits letter thats needed hererather its like Third Testament lets pause consider always-genuine inquiry Despite fact volumes have written other magazinesnot mention several books subject always new folks getting interested both modeling Electric references just mentioned historyie probably unknown new readers course like columnist Im helping folks get started responding such wide open request BIG job Given Id like offer some suggestions folks really have all-encompassing question ask course Im well aware future new readers will necessarily benefit following morsel wisdom since too will soon become history very helpful to know about interests develop response everything question exampleare experienced modeler think glue some computer part readers turns out have never built anything Id inclined respond quite differently folks Ive building gas jobs 40 s folks too building thing flying something else comment about experience regard helpful well Next Id like know what model type appeals example some readers like OTs some sailplanes some experienced pilots want something hotter try Electric Some just want planes So tell Id also like know have budget target 40 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Beginners Write Letter 2 License Plate Contest 3 Electric InstallationsPart Eight 4 New Connector Announcement Detail modified clip used 1A-in hex 6-32 machine nut sweat soldered clip body A-in hex nut 6-32 x -in screw No 6 sprIng lock washer shown make thumb screw Pieces preparation Three top pieces nave solder pre-coating place lowest sample yet coated Solder end wire strands near insulation clean Contact piece between wires original state contact near top wire has drilled bottom pre-soldered Overview soldering fixture Make sure clip holds Sermos contact line wire trough post top screw mount center being determined Side view fixture use left few minutes needed make handy gadget makes big difference solder job hand Photo right shows end view Sermos contact piece clips grip Note thumb screw up against movable arm clip Rubberband holds wire post groove investment level mind theres sort obvious questiondoes anyone else area club fly Electric Now what about local hobby dealer Does carry anything Electric Does know spell E-l-e-c-t-r-i-c reason youre writing help might surprised readers get nothing discouragement local shop comes Electric way becoming favorite pet peeves not-quite-up-to-date hobby dealers out Its time recognize Electric force present major force future Modeldom no reason negative about Electric lack familiarity topic start reading give try yourself Im convinced Electric will grow become major part hobby businessyour business back helping newcomers Remember point herehelp help Keep letters point include point Ill very best help get started whatever way can course please include SASE contest contest different kind subtly announced last month missed go back check out photo FLY E license plate submitted Massachusetts reader reacting own offering issue year agoa photo own proud E FLIGHT vanity plate challenge first State Anyway having received first reader photo decided run own sorta contest invite encourage readers develop own personalized creative vanity plates designed spread Electric word Send photo some future column Ill present pix receive readers can vote favorite plate getting reader reaction winsa Todays ILL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 -includes Crystals Certification RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion available Full 1991 Specs Rx alone 72175 mhz -$6995 OrderModel RCD100 Futabla G AM$6995 Model RCD15O Futabla J AM$6995 Model RCD200 Futabta J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD150KB Kraft K-Une B$6995 Model RCD1S0JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx trequency change . $8995 Call Today Ultra Narrow Band AM Receiver Model KMRDC4-7A Years developing worth wait Features Dual conversion AGC Crystal Ceramic Fitters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 60 VDC Temperature -10 120T 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down CE Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers 4- Calibrated Test Instruments 4- Large Inventory RIC Parts Crystals 4- 6 Meter Specials List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-s 10 Send Self Addressed Envelope Brochures UPS US Mail Federal Express COD Shipping Charges Extra Mastercard Visa Accepted Midwest Inc RADI115 E Main Northville MI 48167 W 313 348-0085 FAX 313 348-4175 Hobbies Skyvolt kit see MA 1/90 Realizing will take some time photo submissions can made up Dec 31 1992 will take few months publish photos receive reader reaction pix become property columnist will returned thats submissions better course Remember spreading Electic word wayeverywhere drive drive front hobby shops few times Ill print reminder long-term competition now course plate eligible have lots Skyvolts FLY E plate last issue will repeated time comes Nowwhy am doing Because believe Electrica major part Modeldoms future Electric installations continues month offering prompted readers letter recent letter posed question best install Sermos connectors writer explained always has difficulties soldering cannot seem get quality joint As read tried respond letter realized two things First problems seemed center soldering Sermos connector per se Second tough question answer Continued page 116 August 1991 41 little extra solder being added final touch Note iron under contactheat flows up Wire strands between Insula tion contact barrel still have no sol der keeps region flexible Eloranta University Wisconsin provided fresh look thermals transcribed words couldnt capture videotapes made 3D glider pictures development growth movement thermals 1989 National Sailplane Symposium Proceedings can obtained Walt Seaborg 1517 Forest Glen Road Oregon Wisconsin 53575 cost $1200 3rd class mail $1350 1st class number copies back issues 1983-88 available RC Electrics/Kopski Continued page 41 pictures replace many words needed Thinking others may have questions kind Im now offering following several prerequisites good soldering general fall two categories tools technique former rather simple deal latter rather simple deal former requires few dollars latter little practice Firstthe tools column will address Sermos connector example can say Electric modeling wiring requirements can met soldering iron iron needed 25- 35-watt about A-inch chisel tip example ACE catalog No 32K7760 Ungar handle No 32K1235S element 32KPL113 tip good buy broad based soldering capability two irons Heath catalog No GDP-3125 No GDP-3 140 irons tip assortment GDP 3100 things future Irons avoid include coneshaped tip irons unclad copper tips soldering guns Soldering tips clad iron and/or silver plating favorites strongly recommend Soldering guns well suited purposes harder handle dont have good tip shapes generally get too hot have too little thermal mass soldering guns have limited applications own several virtually never use Its also necessary use right solder always use 60/40 small diameter built-in electronics-grade flux acid An example Radio Shack No 64-005 solder 0032 inch diameter real all-time favorite Ersin MultiCoreeither SN 60 SN 62 comparable diameter brand always first choicethough harder find Now back Sermos connector soldering example photos show simple readily made holding device fixture use own Sermos connectors use lots Sermos connectors Nothing about assembly Continued page 118 OTYFUELiGAL 4GAL24GAL6OGAL12SGaI 54 GAL 1TOTAL$ ordered MIXTUREI DRUMAMT RED MAX PREMIUM FUELII Thie fuel beginners Es sport flyers should use Avail synthetic castor blend RED MAX0102174068664861115444 REDMAX5117785980578370321604 ______ RED MAX 10139396791387378326970 RED MAX 1215551062100292983430447 _____ RED MAX 1517171156109198788633925 _______ RED MAX RACING FUEL Trophy winner planes boats Es cars two boat blends castor ok up 40% nitro RED MAX2O1885134512641215110746643 RED MAX 252149153414361365129054294 REDMAX4O2817208819531853166277445 REDMAX5O3416246622932131190992845 RED MAX 6034782587240322932158108246 RED MAX 6535912700251623992282115996 RED MAX 4-CYCLE FUEL Eliminates detonation Es kickback 4-cycle engines smoother idle Es power 10-4 CYCLE139396791387378326970 15-4CYCLE1717 1158 109198788633925 alive power performance YOU never expected Can have power Its phone call away Power today next week next year Red Maxs Secret gredients keep engine last ing longer running power fully other 100% money _____back guaran tee Com pletely sat isfied reason Red Max has power better idle better wear charGrandacteristics Totslthan 116 Model Aviation RED MAX FUEL Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals Freight col act drums Deduct 3% prepay Mis qty Total qty determines price SC orders add 5% sales tas Dealer club prices avail Accept credit cards checks COD COD add $3 per cartonl Personal checks may held until cleared UPS Hazardous charge $500 per carton RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs ...10 Helicopter1447 1021967927837 29886 ..l5Helicopter1771 1210 1145 104194036841 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan Es other heavy dty app 5 Performance123191385983775724520 _______ 10 Performance1447102196792783729886 _______ 15 Performance1771 1210 1145 104194036841 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps tuned pipes 5 Pattern119387582179971922144 10 Pattern140998392988979927402 15 Pattern1733 1172 1107 100390230987 ________ SUPER TIGER 3000 FUEL Beat fuel Super Tiger 2000-4000 engInes ______Super Tiger 3000 1200895845886725 124972 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings1908 1432 1393 1279 1146 DieselPlanBw$tgs 2016 1540 1501 1387 1253 SMOKER FLUID best smoker fluid 2 4 cycle engines Smoker Fluid129089584580872524972 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Call price Mm gallon boats-carshelicopters-spaed-pattern-scale/ scale-kavan-ignitlon-st3000 PLEASE PRINT BOX / RTRFFT CITY Power easy starting power smooth take offs power intricate maneuvers Red Max makes engine come other fuel colorful Gee Bee Z first barrel-shaped racers constructed Granville Brothers Springfield Massachusetts During 1931 won five races including prestigious Thompson Trophy Cleveland Ohio National Air Races Z also direct forerunner famous Gee Bee R-1 R-2 FEATURES TWO TYPES OF COWLINGS TYPES OF WHEELS HARD AND FLEXIBLE TIRES ILED INTERIOR Send $3 complete illustrated catalog DEPT MA 181 PAWNEE ST SAN MARCOS CALIFORNIA 92069 RC Electrics/Kopski Continued page 116 very critical should have difficulty making similar device yourself As shown 1A-inch ply baseplate measures about 3 x 4 inches Y4-in square support post lA inches high latter has half-round groove top surface nest wire filed trough / inch round rat-tail file final piece wood shown % inch dowel rubberband holder Small tacks heads protruding bit would serve just well Finally fixture has small stick-on rubber feet bottom corner reduce its tendency slide work bench surface alligator clip happens Mueller No 60 similar clip should just well Try Radio Shack local auto hardware store As shown clip modified slightly 6-32 nut sweat soldered placeright threaded hole hold wireholding set screw anyway turned out ready made threads werewell lousy made new ones sorta soldered-in-place nut nut accepts 3A -inch 6-32 machine screw thumb-tightened against opposing movable clip arm after Sermos contact clip jaws screw need very tightprevents clip loosening its grip contact under soldering pressure reduces clips tendency open way second nut shownthe jammed up against screw head itself No 6 spring lock washer betweenis just make easy two fingers turn screw makes neat thumb screw particular clip used fits very snugly base-mounted No 8 machine screw fact turned though threadswhich doesnt Its just tight fit No 8 machine screw shown 34 long held baseplate lock washer nut Im sure can find some similar attachment means clip no matter what particular clip have snug force fit thats needed idea just hold clip firmly vertically place Use some epoxy else fails way note clip mounting location will general center-line groove filed post because clips asymmetrical Check out Sermos contact gripped clip adjust mount center accordinglyby eye good enough thats needed wire emerging past vertical post line Sermos contactup down sideways too latter clip harder describe written word actual soldering operation has three steps include pre-soldering connector contact pre-soldering wire finally soldering first two together Lets start metal connector contact piece Ive found little trick think helps soldering process Sermos connectors As seen photos have drilled small hole Q/16 in top contact barrel solder cup Note hole near closed end cup small hole allows feed-in solder exactly its neededas will see course can feed solder open end cupas used tobut has its problems Anyway small hole easily drilled setting contact piece trough wooden post steady drilling hole through soft copper base material Sermos part Take care drill just holedont go through both sides cup will find simple operation ultimately makes soldering job hole lot easier caution sure handling contact deform contact finger can happen could cause poor connector operation later Now prepare wire As pictured wire insulation stripped dont nick cut strands please wire length just bit longer contact Continued page 121 * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 PkI2 Inserts Coarse Cat No 204 Pk/2 Inserts Fine FITS MOST ENGINES 25 UP $275 $275 $239 $239 PRODUCTS Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship & Performance 118 Model Aviation SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc PO Box 3786 Center Line Michigan 48016 Add $250 shipping igan residents add 4% sales taxi RC Electrics/Kopski Continued page 118 barrel cup suggest using wire stripping tooleasily obtained Radio Shack hardware stores Twist wire strands together few finger spins keep zillion strands gathered what follows As shown photos wire pre coated solderonly very end exposed strands idea allow solder wick back toward insulation make latter region stiff suggest practice solder coating just very end shown holding iron against end wire feeding little solder region need enough solder fill strands wire end enough flows back insulation Also dont use much solder coated wire wont fit contact cup strongly encourage try few times some scrap wire get good feel operation develop technique way easily done wire resting post groove exposed wire extending past post bitusing captivating rubberband hold wire post Now well pre-solder contact Slip contact over cooled wire end move both toward squeezed open clipstraight leveland allow clip close edges sides contact piece flat contact surfaces Just get wire contact piece both aimed level Now gently snug-up thumb screwallowing just touch inside moving half clip Just slight screw pressure really grips Sermos contact Its solder time Fully retract wire get out way bring iron tip firm contact under solder cup allowing heat metal part several seconds Incidentally soldering iron tip should wiped clean use damp solder sponge cloth suede brush excess solder before bringing bear workthis will keep outer surface contact solder-free smooth Now feed solder small hole drilledabout 1 114 inches solder mentioned above about rightallowing solder melt feed place Let molten solder collect inside closed end solder cup idea have solder puddle pre-coated wire end will two brought together iron still held place keep solder molten feed wire end allowing bottom closed end cup Allow time wire solder pre-coat reflow seems appropriate feed some additional solder drilled hole Once againdo allow solder wick back along wire wire insulation region remain free solder flexible Remove iron allow assembly cool Give enough time before moving anything Loosen thumb screw squeeze clip release contact Prestoone great Sermos contact installationby very own hands point its important clean contact flux has flowed over surface use acetone throwaway hardware store acid brush ACE poxy brush Catalog No 224L050 scrubbing contact surfaces clean such residue important good contact operation Dont scrape surfaces youll risk damaging silver platingjust use solvent brush wipe dry tissue metal contact now ready installation Sermos plastic housing thats needed good solder jobgiven right toolsis little practice get technique right know lots folks have difficulty soldering process its like much else lifeit really can done well anyone Ill have soldering things future Meanwhile heres hoping has some help Late News As Im writing very column first pieces longawaited new Astro connector sets have arrived door two-pin Continued page 122 SPECIALISTS INCUS TOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM& STOCKPARTS VAILABLE INDIWDUALL V COMPETITIONACCESSORIES RACING WHEELS KLOTZOIL CARBON FIBER SOLID LINES ALL KINDS OFFUEL TUBING THREE BRANDS OFGLOWPLUGS HA RD-TO-FIND HA RD WARE OLD TIMER SUPPLIES COILS CONDENSERS NGK& STI7T SPARKPLUGS SILK8 COLORS QUALITYDOPEBRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTORIGNITIONSYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOYSR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER P0 WER KITS PROPS TISSUEAND OTHER SUPPLIES C YANOA CR YLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO C0D VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $300 STOCK ORDERS SHIPPED WITHIN 24 HRS August 1991 121 JUN I1 V-Ut- IIVVkIV UN V VERA GES 0 VER 9000 PROPS ! IMMEDIA TESHIPMENTON VISA/MC RV-3 Deluxe Kit Need Only Join Wing Halves Install Tail Feathers Cover Complete Hardware Package Included 85 wingspan G-38 G62 engine sizes 17-20 lbs weight range informarion call wrte W1CRAFr4 PO Box 299 Gonzales Texas 78629 512 5404133 Electric F ight Lightweight 12 anmaney back Adjustable switching paint guarantee Soldertess terminal far easy hookup ON/OFF Controller 2995 Mare Power save weight Very high eltirrency anly O06V lass 211 Size 22x1Sx63 Add StOlforshippiag 17Th Send Cheek ar maney arder ta CosesrsirhHIgh Sky l1ataba esnareror3929 Kansas St #9 O~5~seeSan DlegoCA 92104 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion andComputer Designed3 Axis Control Reserve Grand Champion UltralightPart 103 Ultralight* Easy Construction 1989 Sun-N-Fun Fly-In* Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 assembly employing rather large goldplated contacts compact plastic housing Ill have details next month including photos data Heres wishing happy quiet safe Electric-flyin Summer Spirit/Haught Continued page 45 fillerepoxy-and-microballoons works wellfor smooth transition wing leading edge-fuselage joint Give fuselage-and-tail assembly good sanding prepare finishing Covering finishing Apply three coats thinned clear dope wood surfaces Cover lightweight silkspan help fill grain strengthen wood Dope newly covered areas four coats clear dope sanding well between dope drying cut out fit wing landing gear stabilizer struts strutsand theres bunch themall need sanded doped glued place Naturally have no color scheme decisions make airplane As aviation buffs know its silver over sanding filling less perfect youll know after spraying E brushing color dope Silver shows mistakes Correct flaws find before adding last coat color markings black cut out trim sheet pressed place top window can cut same sheet carefully positioned top wing Reproducing signature swirl pattern burnished aluminum sheet panels front fuselage presented bit challenge Looking around workshop found roll aluminum tape used repair furnace ducts Available hardware stores its basically thin strip aluminum strong adhesive coat side waxed paper backing Just peel off backing presto Aluminum panels used electric eraser fitted hard rubber eraser make swirls Place spinning eraser direcfly aluminum tape Press lightly lift up theres swirl Experiment until get DUAL STRUT N" DLATEO MORE GEAR ye. / LJLJJ Fults Tooling PO Box 95 Champaigi right effect make up several long sections burnished aluminum tape short piece eraser mounted variable-speed drill can also used create swirl Apply tape panels nose carefully rubbing out wrinkles Wrap excess over nose trim off out sight Williams Bros World War wheels look about right Spirit Paint hubs silver before mounting Add engine spinner balance model Dummy engine detailing dummy engine less difficult make looks Find -in cardboard rocket body tube other tubing similar size Wrap tube heavy thread simulate engine cooling fins Cap disc A2 sheet balsa add %-in-sq balsa rocker covers Repeat process seven times plan shows radial centering nine cylinders since real engine takes up some available room need oaly make seven Trimming cylinders sit correcfly cowl tricky part Take time get right Paint cylinder J 620 CRANDALLLAI4ESVILLE RD CORYDON INDIANA 47112 ** __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW In Business since 1973 PRICES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSDAY9AM-SPM FRIDAY 9AAI-2PM A-JUSTO JIGCLOSED SATURDAY& SUNDAY E 812 366-3141 AMBROIDFUTABASONIC-TRONICSSTAFFORD KITS AVAILABLE SHORTLY ARCORUBBERBANDSGOLDBERGSTERLING BRIDIGAS MODEL PRODSULLIVANB24 TWIN COMANCHE COMANCHE & MORE DAVEYS SYSTEMSHALLCOTOP FLITE COVE RITEHOBBYPOXYVS ENGINES DREMELK&BMFGMILLERStafford EAA ACRO SPORT OEVCONHOT STUFFLANIER ___________________________-i OU-BROSIGNORTHEAST SCALE SPORS PASTERN ESA EN NE DYNAFILITESAITOZINGER PROPS SIMPLIFIED BALSA & SPRUCE ON SEIEC lION ROlLTOP JIG MOLDED COWL PANTS WIND 1-Il LU STAFFORD AIRCOUPE $9995 Par complete listing etcplease send stamped self-address enve lope DEALERS WANTED FKKITS GIwfrj4tickum Buildum & FIYum need help Call us arf/flbe/ass Fg9x AFTER HOURS CALL WE MIGHT BE HERE -I THANKS FOR YOUR BUSINESS BILL & JOYCE 122 Model Aviation INFO $500

LAST MONTHS column included comments regarding reader letters wherein thrust help help Among other things poked some fun common kind letterthe please tell everything need know get started kind hope point got acrossits letter thats needed hererather its like Third Testament lets pause consider always-genuine inquiry Despite fact volumes have written other magazinesnot mention several books subject always new folks getting interested both modeling Electric references just mentioned historyie probably unknown new readers course like columnist Im helping folks get started responding such wide open request BIG job Given Id like offer some suggestions folks really have all-encompassing question ask course Im well aware future new readers will necessarily benefit following morsel wisdom since too will soon become history very helpful to know about interests develop response everything question exampleare experienced modeler think glue some computer part readers turns out have never built anything Id inclined respond quite differently folks Ive building gas jobs 40 s folks too building thing flying something else comment about experience regard helpful well Next Id like know what model type appeals example some readers like OTs some sailplanes some experienced pilots want something hotter try Electric Some just want planes So tell Id also like know have budget target 40 Model Aviation Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 THIS MONTHS TOPICS 1 Beginners Write Letter 2 License Plate Contest 3 Electric InstallationsPart Eight 4 New Connector Announcement Detail modified clip used 1A-in hex 6-32 machine nut sweat soldered clip body A-in hex nut 6-32 x -in screw No 6 sprIng lock washer shown make thumb screw Pieces preparation Three top pieces nave solder pre-coating place lowest sample yet coated Solder end wire strands near insulation clean Contact piece between wires original state contact near top wire has drilled bottom pre-soldered Overview soldering fixture Make sure clip holds Sermos contact line wire trough post top screw mount center being determined Side view fixture use left few minutes needed make handy gadget makes big difference solder job hand Photo right shows end view Sermos contact piece clips grip Note thumb screw up against movable arm clip Rubberband holds wire post groove investment level mind theres sort obvious questiondoes anyone else area club fly Electric Now what about local hobby dealer Does carry anything Electric Does know spell E-l-e-c-t-r-i-c reason youre writing help might surprised readers get nothing discouragement local shop comes Electric way becoming favorite pet peeves not-quite-up-to-date hobby dealers out Its time recognize Electric force present major force future Modeldom no reason negative about Electric lack familiarity topic start reading give try yourself Im convinced Electric will grow become major part hobby businessyour business back helping newcomers Remember point herehelp help Keep letters point include point Ill very best help get started whatever way can course please include SASE contest contest different kind subtly announced last month missed go back check out photo FLY E license plate submitted Massachusetts reader reacting own offering issue year agoa photo own proud E FLIGHT vanity plate challenge first State Anyway having received first reader photo decided run own sorta contest invite encourage readers develop own personalized creative vanity plates designed spread Electric word Send photo some future column Ill present pix receive readers can vote favorite plate getting reader reaction winsa Todays ILL FL Y WHA T FIX Special Fast Turnaround Now Available CALL uency Conversion $4000 -includes Crystals Certification RCD AM & FM 7 Channel Receiver Special exclusive 6 meters -$7995 TX conversion available Full 1991 Specs Rx alone 72175 mhz -$6995 OrderModel RCD100 Futabla G AM$6995 Model RCD15O Futabla J AM$6995 Model RCD200 Futabta J FM$6995 Model RCD300 Airtronic AM$6995 Model RCD150KB Kraft K-Une B$6995 Model RCD1S0JR JR AM$6995 Model RODi 50TH Tower 500$6995 Match tuned Gold 1991 Tx$7495 Tuned aligned updating Tx$7995 Tuned aligned Tx trequency change . $8995 Call Today Ultra Narrow Band AM Receiver Model KMRDC4-7A Years developing worth wait Features Dual conversion AGC Crystal Ceramic Fitters 50 53 72 75 Mhz Connectors Kraft styles Deans World & specials Specifications Size 275 70mm x 165 415mm x 825 205mm Weight 165 oz Working Voltage 38 60 VDC Temperature -10 120T 10 Khz spacing Bandwidth 1- 85 khz 60db down 301P 3db Image 60db down CE Service Ace Cirrus EK Futaba Heathkit Hobbyshack JR KGL K-Line KO Propo Kraft KSE Logitrol Novak Royal Tower Hobbies World Engines Spectrum Analyzers 4- Calibrated Test Instruments 4- Large Inventory RIC Parts Crystals 4- 6 Meter Specials List Prices Exceeds AMA Rx Guidelines 4 Channel$9495 5 Channel$9995 6 Channel$10495 7 Channel$10995 Pro-Line Units add $1000 Dealers Discounts available Rx Trade $5-s 10 Send Self Addressed Envelope Brochures UPS US Mail Federal Express COD Shipping Charges Extra Mastercard Visa Accepted Midwest Inc RADI115 E Main Northville MI 48167 W 313 348-0085 FAX 313 348-4175 Hobbies Skyvolt kit see MA 1/90 Realizing will take some time photo submissions can made up Dec 31 1992 will take few months publish photos receive reader reaction pix become property columnist will returned thats submissions better course Remember spreading Electic word wayeverywhere drive drive front hobby shops few times Ill print reminder long-term competition now course plate eligible have lots Skyvolts FLY E plate last issue will repeated time comes Nowwhy am doing Because believe Electrica major part Modeldoms future Electric installations continues month offering prompted readers letter recent letter posed question best install Sermos connectors writer explained always has difficulties soldering cannot seem get quality joint As read tried respond letter realized two things First problems seemed center soldering Sermos connector per se Second tough question answer Continued page 116 August 1991 41 little extra solder being added final touch Note iron under contactheat flows up Wire strands between Insula tion contact barrel still have no sol der keeps region flexible Eloranta University Wisconsin provided fresh look thermals transcribed words couldnt capture videotapes made 3D glider pictures development growth movement thermals 1989 National Sailplane Symposium Proceedings can obtained Walt Seaborg 1517 Forest Glen Road Oregon Wisconsin 53575 cost $1200 3rd class mail $1350 1st class number copies back issues 1983-88 available RC Electrics/Kopski Continued page 41 pictures replace many words needed Thinking others may have questions kind Im now offering following several prerequisites good soldering general fall two categories tools technique former rather simple deal latter rather simple deal former requires few dollars latter little practice Firstthe tools column will address Sermos connector example can say Electric modeling wiring requirements can met soldering iron iron needed 25- 35-watt about A-inch chisel tip example ACE catalog No 32K7760 Ungar handle No 32K1235S element 32KPL113 tip good buy broad based soldering capability two irons Heath catalog No GDP-3125 No GDP-3 140 irons tip assortment GDP 3100 things future Irons avoid include coneshaped tip irons unclad copper tips soldering guns Soldering tips clad iron and/or silver plating favorites strongly recommend Soldering guns well suited purposes harder handle dont have good tip shapes generally get too hot have too little thermal mass soldering guns have limited applications own several virtually never use Its also necessary use right solder always use 60/40 small diameter built-in electronics-grade flux acid An example Radio Shack No 64-005 solder 0032 inch diameter real all-time favorite Ersin MultiCoreeither SN 60 SN 62 comparable diameter brand always first choicethough harder find Now back Sermos connector soldering example photos show simple readily made holding device fixture use own Sermos connectors use lots Sermos connectors Nothing about assembly Continued page 118 OTYFUELiGAL 4GAL24GAL6OGAL12SGaI 54 GAL 1TOTAL$ ordered MIXTUREI DRUMAMT RED MAX PREMIUM FUELII Thie fuel beginners Es sport flyers should use Avail synthetic castor blend RED MAX0102174068664861115444 REDMAX5117785980578370321604 ______ RED MAX 10139396791387378326970 RED MAX 1215551062100292983430447 _____ RED MAX 1517171156109198788633925 _______ RED MAX RACING FUEL Trophy winner planes boats Es cars two boat blends castor ok up 40% nitro RED MAX2O1885134512641215110746643 RED MAX 252149153414361365129054294 REDMAX4O2817208819531853166277445 REDMAX5O3416246622932131190992845 RED MAX 6034782587240322932158108246 RED MAX 6535912700251623992282115996 RED MAX 4-CYCLE FUEL Eliminates detonation Es kickback 4-cycle engines smoother idle Es power 10-4 CYCLE139396791387378326970 15-4CYCLE1717 1158 109198788633925 alive power performance YOU never expected Can have power Its phone call away Power today next week next year Red Maxs Secret gredients keep engine last ing longer running power fully other 100% money _____back guaran tee Com pletely sat isfied reason Red Max has power better idle better wear charGrandacteristics Totslthan 116 Model Aviation RED MAX FUEL Order Form CALL OR USE THIS HANDY ORDER FORM TO SPEED YOUR ORDER FILL IN OTY ON THE LEFT THE TOTAL ON THE RIGHT Freight free qts gals Freight col act drums Deduct 3% prepay Mis qty Total qty determines price SC orders add 5% sales tas Dealer club prices avail Accept credit cards checks COD COD add $3 per cartonl Personal checks may held until cleared UPS Hazardous charge $500 per carton RED MAX HELICOPTER FUEL Extremely smooth running extra defoamer drk color special heavy oil helicptrs ...10 Helicopter1447 1021967927837 29886 ..l5Helicopter1771 1210 1145 104194036841 RED MAX PERFORMANCE FUEL High flash point heavy oil use tuned pipes ducted fan Es other heavy dty app 5 Performance123191385983775724520 _______ 10 Performance1447102196792783729886 _______ 15 Performance1771 1210 1145 104194036841 RED MAX PATTERN FUEL Proven best fuel pattern engines using pumps tuned pipes 5 Pattern119387582179971922144 10 Pattern140998392988979927402 15 Pattern1733 1172 1107 100390230987 ________ SUPER TIGER 3000 FUEL Beat fuel Super Tiger 2000-4000 engInes ______Super Tiger 3000 1200895845886725 124972 RED MAX DIESEL FUEL Superior diesel back list popular demand customers Ball Bearings1908 1432 1393 1279 1146 DieselPlanBw$tgs 2016 1540 1501 1387 1253 SMOKER FLUID best smoker fluid 2 4 cycle engines Smoker Fluid129089584580872524972 CUSTOM BLENDED FUEL INGRDIENTS Available type engine use Call price Mm gallon boats-carshelicopters-spaed-pattern-scale/ scale-kavan-ignitlon-st3000 PLEASE PRINT BOX / RTRFFT CITY Power easy starting power smooth take offs power intricate maneuvers Red Max makes engine come other fuel colorful Gee Bee Z first barrel-shaped racers constructed Granville Brothers Springfield Massachusetts During 1931 won five races including prestigious Thompson Trophy Cleveland Ohio National Air Races Z also direct forerunner famous Gee Bee R-1 R-2 FEATURES TWO TYPES OF COWLINGS TYPES OF WHEELS HARD AND FLEXIBLE TIRES ILED INTERIOR Send $3 complete illustrated catalog DEPT MA 181 PAWNEE ST SAN MARCOS CALIFORNIA 92069 RC Electrics/Kopski Continued page 116 very critical should have difficulty making similar device yourself As shown 1A-inch ply baseplate measures about 3 x 4 inches Y4-in square support post lA inches high latter has half-round groove top surface nest wire filed trough / inch round rat-tail file final piece wood shown % inch dowel rubberband holder Small tacks heads protruding bit would serve just well Finally fixture has small stick-on rubber feet bottom corner reduce its tendency slide work bench surface alligator clip happens Mueller No 60 similar clip should just well Try Radio Shack local auto hardware store As shown clip modified slightly 6-32 nut sweat soldered placeright threaded hole hold wireholding set screw anyway turned out ready made threads werewell lousy made new ones sorta soldered-in-place nut nut accepts 3A -inch 6-32 machine screw thumb-tightened against opposing movable clip arm after Sermos contact clip jaws screw need very tightprevents clip loosening its grip contact under soldering pressure reduces clips tendency open way second nut shownthe jammed up against screw head itself No 6 spring lock washer betweenis just make easy two fingers turn screw makes neat thumb screw particular clip used fits very snugly base-mounted No 8 machine screw fact turned though threadswhich doesnt Its just tight fit No 8 machine screw shown 34 long held baseplate lock washer nut Im sure can find some similar attachment means clip no matter what particular clip have snug force fit thats needed idea just hold clip firmly vertically place Use some epoxy else fails way note clip mounting location will general center-line groove filed post because clips asymmetrical Check out Sermos contact gripped clip adjust mount center accordinglyby eye good enough thats needed wire emerging past vertical post line Sermos contactup down sideways too latter clip harder describe written word actual soldering operation has three steps include pre-soldering connector contact pre-soldering wire finally soldering first two together Lets start metal connector contact piece Ive found little trick think helps soldering process Sermos connectors As seen photos have drilled small hole Q/16 in top contact barrel solder cup Note hole near closed end cup small hole allows feed-in solder exactly its neededas will see course can feed solder open end cupas used tobut has its problems Anyway small hole easily drilled setting contact piece trough wooden post steady drilling hole through soft copper base material Sermos part Take care drill just holedont go through both sides cup will find simple operation ultimately makes soldering job hole lot easier caution sure handling contact deform contact finger can happen could cause poor connector operation later Now prepare wire As pictured wire insulation stripped dont nick cut strands please wire length just bit longer contact Continued page 121 * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse Cat No 202 Air Cleaner Fine Replacement Inserts Cat No 104 PkI2 Inserts Coarse Cat No 204 Pk/2 Inserts Fine FITS MOST ENGINES 25 UP $275 $275 $239 $239 PRODUCTS Complete Line Exhaust Systems Tuned Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship & Performance 118 Model Aviation SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc PO Box 3786 Center Line Michigan 48016 Add $250 shipping igan residents add 4% sales taxi RC Electrics/Kopski Continued page 118 barrel cup suggest using wire stripping tooleasily obtained Radio Shack hardware stores Twist wire strands together few finger spins keep zillion strands gathered what follows As shown photos wire pre coated solderonly very end exposed strands idea allow solder wick back toward insulation make latter region stiff suggest practice solder coating just very end shown holding iron against end wire feeding little solder region need enough solder fill strands wire end enough flows back insulation Also dont use much solder coated wire wont fit contact cup strongly encourage try few times some scrap wire get good feel operation develop technique way easily done wire resting post groove exposed wire extending past post bitusing captivating rubberband hold wire post Now well pre-solder contact Slip contact over cooled wire end move both toward squeezed open clipstraight leveland allow clip close edges sides contact piece flat contact surfaces Just get wire contact piece both aimed level Now gently snug-up thumb screwallowing just touch inside moving half clip Just slight screw pressure really grips Sermos contact Its solder time Fully retract wire get out way bring iron tip firm contact under solder cup allowing heat metal part several seconds Incidentally soldering iron tip should wiped clean use damp solder sponge cloth suede brush excess solder before bringing bear workthis will keep outer surface contact solder-free smooth Now feed solder small hole drilledabout 1 114 inches solder mentioned above about rightallowing solder melt feed place Let molten solder collect inside closed end solder cup idea have solder puddle pre-coated wire end will two brought together iron still held place keep solder molten feed wire end allowing bottom closed end cup Allow time wire solder pre-coat reflow seems appropriate feed some additional solder drilled hole Once againdo allow solder wick back along wire wire insulation region remain free solder flexible Remove iron allow assembly cool Give enough time before moving anything Loosen thumb screw squeeze clip release contact Prestoone great Sermos contact installationby very own hands point its important clean contact flux has flowed over surface use acetone throwaway hardware store acid brush ACE poxy brush Catalog No 224L050 scrubbing contact surfaces clean such residue important good contact operation Dont scrape surfaces youll risk damaging silver platingjust use solvent brush wipe dry tissue metal contact now ready installation Sermos plastic housing thats needed good solder jobgiven right toolsis little practice get technique right know lots folks have difficulty soldering process its like much else lifeit really can done well anyone Ill have soldering things future Meanwhile heres hoping has some help Late News As Im writing very column first pieces longawaited new Astro connector sets have arrived door two-pin Continued page 122 SPECIALISTS INCUS TOM COX TEE DEE & REED ENGINES 020S 049S 051S 074S & 09S ALL CUSTOM& STOCKPARTS VAILABLE INDIWDUALL V COMPETITIONACCESSORIES RACING WHEELS KLOTZOIL CARBON FIBER SOLID LINES ALL KINDS OFFUEL TUBING THREE BRANDS OFGLOWPLUGS HA RD-TO-FIND HA RD WARE OLD TIMER SUPPLIES COILS CONDENSERS NGK& STI7T SPARKPLUGS SILK8 COLORS QUALITYDOPEBRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTORIGNITIONSYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOYSR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER P0 WER KITS PROPS TISSUEAND OTHER SUPPLIES C YANOA CR YLATES & EPOXIES ORDER BY MAIL OR PHONE 619 728-4365 SORRY NO C0D VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING HANDLING AND INSURANCE FEE $300 STOCK ORDERS SHIPPED WITHIN 24 HRS August 1991 121 JUN I1 V-Ut- IIVVkIV UN V VERA GES 0 VER 9000 PROPS ! IMMEDIA TESHIPMENTON VISA/MC RV-3 Deluxe Kit Need Only Join Wing Halves Install Tail Feathers Cover Complete Hardware Package Included 85 wingspan G-38 G62 engine sizes 17-20 lbs weight range informarion call wrte W1CRAFr4 PO Box 299 Gonzales Texas 78629 512 5404133 Electric F ight Lightweight 12 anmaney back Adjustable switching paint guarantee Soldertess terminal far easy hookup ON/OFF Controller 2995 Mare Power save weight Very high eltirrency anly O06V lass 211 Size 22x1Sx63 Add StOlforshippiag 17Th Send Cheek ar maney arder ta CosesrsirhHIgh Sky l1ataba esnareror3929 Kansas St #9 O~5~seeSan DlegoCA 92104 AFTER YOU DID ALL THE WORK WHY LET YOUR AIRPLANE DO ALL THE FLYING BUILD & FLY THE miniMAX YOURSELF AWARDED Grand Champion andComputer Designed3 Axis Control Reserve Grand Champion UltralightPart 103 Ultralight* Easy Construction 1989 Sun-N-Fun Fly-In* Wood Construction TEAM INC BOX 338M BRADYVILLE TN 37026 615 765-5397 assembly employing rather large goldplated contacts compact plastic housing Ill have details next month including photos data Heres wishing happy quiet safe Electric-flyin Summer Spirit/Haught Continued page 45 fillerepoxy-and-microballoons works wellfor smooth transition wing leading edge-fuselage joint Give fuselage-and-tail assembly good sanding prepare finishing Covering finishing Apply three coats thinned clear dope wood surfaces Cover lightweight silkspan help fill grain strengthen wood Dope newly covered areas four coats clear dope sanding well between dope drying cut out fit wing landing gear stabilizer struts strutsand theres bunch themall need sanded doped glued place Naturally have no color scheme decisions make airplane As aviation buffs know its silver over sanding filling less perfect youll know after spraying E brushing color dope Silver shows mistakes Correct flaws find before adding last coat color markings black cut out trim sheet pressed place top window can cut same sheet carefully positioned top wing Reproducing signature swirl pattern burnished aluminum sheet panels front fuselage presented bit challenge Looking around workshop found roll aluminum tape used repair furnace ducts Available hardware stores its basically thin strip aluminum strong adhesive coat side waxed paper backing Just peel off backing presto Aluminum panels used electric eraser fitted hard rubber eraser make swirls Place spinning eraser direcfly aluminum tape Press lightly lift up theres swirl Experiment until get DUAL STRUT N" DLATEO MORE GEAR ye. / LJLJJ Fults Tooling PO Box 95 Champaigi right effect make up several long sections burnished aluminum tape short piece eraser mounted variable-speed drill can also used create swirl Apply tape panels nose carefully rubbing out wrinkles Wrap excess over nose trim off out sight Williams Bros World War wheels look about right Spirit Paint hubs silver before mounting Add engine spinner balance model Dummy engine detailing dummy engine less difficult make looks Find -in cardboard rocket body tube other tubing similar size Wrap tube heavy thread simulate engine cooling fins Cap disc A2 sheet balsa add %-in-sq balsa rocker covers Repeat process seven times plan shows radial centering nine cylinders since real engine takes up some available room need oaly make seven Trimming cylinders sit correcfly cowl tricky part Take time get right Paint cylinder J 620 CRANDALLLAI4ESVILLE RD CORYDON INDIANA 47112 ** __________________________ Large selection Remote Control Model Airplanes professional LISTED BELOW In Business since 1973 PRICES SUBJECT TO CHANGE WITHOUT NOTICE IS JUST FEW OF THE MFGWE STOCK HOURS MONDAYTHRUTHURSDAY9AM-SPM FRIDAY 9AAI-2PM A-JUSTO JIGCLOSED SATURDAY& SUNDAY E 812 366-3141 AMBROIDFUTABASONIC-TRONICSSTAFFORD KITS AVAILABLE SHORTLY ARCORUBBERBANDSGOLDBERGSTERLING BRIDIGAS MODEL PRODSULLIVANB24 TWIN COMANCHE COMANCHE & MORE DAVEYS SYSTEMSHALLCOTOP FLITE COVE RITEHOBBYPOXYVS ENGINES DREMELK&BMFGMILLERStafford EAA ACRO SPORT OEVCONHOT STUFFLANIER ___________________________-i OU-BROSIGNORTHEAST SCALE SPORS PASTERN ESA EN NE DYNAFILITESAITOZINGER PROPS SIMPLIFIED BALSA & SPRUCE ON SEIEC lION ROlLTOP JIG MOLDED COWL PANTS WIND 1-Il LU STAFFORD AIRCOUPE $9995 Par complete listing etcplease send stamped self-address enve lope DEALERS WANTED FKKITS GIwfrj4tickum Buildum & FIYum need help Call us arf/flbe/ass Fg9x AFTER HOURS CALL WE MIGHT BE HERE -I THANKS FOR YOUR BUSINESS BILL & JOYCE 122 Model Aviation INFO $500