AN ELECTRIC MEET has announced Ahe Westmoreland Electric Soaring Society Pittsburgh PA area July 17 1988 event will held Mon Valley RC Club field located state park read ily accessible Exit 8 New Stanton Pennsylvania Turnpike Bob Maride RIM Systems sent early info details can write him Unit #3 Sandy Hill Road RD #6 Irwin PA 15642 Dont let Soaring part club name fool youthose guys fly kinds Elec trics Bob has regular attendee KRC Elec tric Flys past tells WESS group has 29 active Electric fliers its own Puget Sound Electric Model Fliers PSEMF has announced preliminary plans two-day Electric fly-in scheduled June 25-25 1988 PSEMF special-interest group within larger Boeing Hawks RC Club meet will held club field Kent WA Prizes will awarded biggest smal lest aerobatic best Scale other things can get info contacting Bernard Cawley 29838 48th Ave South Auburn WA 98001 write either Bob Bernard, tell em Bob sent ya Heres final clue Identity Mystery Electric pictured April May co lumns Take close look nameplate still cant guess read column find outl Note over-and-under air Intake scoops show landing gear below Mys tery plane attached ply plate fuselage bottom four nylon landing gear straps Go gear mysterious hand both lighter faster replacement RIM has few new Electric products forthco ming soon include new gear drives 05s Ugh hare such nomenclature Gas en gines gas engines electric motors adjustable audible peak charger alarm Fifty cents same address will get RIM catalog Folding props K&W pictured dis cussed detail March 88 column cluded time comment respect growing prop line Just show adjective teeth K&W has just expanded its already HUGE line two new sizes 7 x 4 12 x 7 So now look prop photo reference column can mentally picture two fans included Check Adver tisers Index K&Ws ad issue giving write details mystery Electric pictured last two columns look em up pictured last time So far write no has guessed what months photo should big help hint everyone Yup Thats right Its Amptique Yes know doesnt look like Amptiquebut thats what Local modeler Fred Ewing models new column built second Amptiquebut obviously personalized liking renamed slightly reflect intent Freds Sportique somewhatreduced-size version very good popu lar Amptique kit Leisure simply chopped off swept tips wing stab changed V dihedral otherwise personalized em bellished wheel pants canopy other goodies ya gotta admit Sportique sure pretty power system another geared Leisure LT SOon seven 800-mAh cells 10 x 6 set blades controlled Jomar SC-5 speed control As Ive often said speed control adds LOT flying dimension Electrics strongly encourage consideration adding existing new models Other mods Amptique include en larged air intake exit system get bat tery coolingsomething thats much needed stock kit Also landing gear assembly held fuselage bottom LG straps 42 Model Aviation Radio Confrol Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Incidental above announcement word Ted Davey head modeler Davey Sys tems Corp DSC Malvern PA Hes holding sorta-Elndecker derived Champion kit DSC acquired Champion last summer Motatlon provided DSC Hyperthrust 075 motor seven SR 900-mAh cells 8 x 4 prop Hell make deal package kitlmotor/wirlng/prop photo Dr Cohn McKinleys Ann Arbor Ml huge Powerhouse January 88 Issue Heres mounted Astro 60 cobalt motor has tour brushes instead usual two found smaller As tro motors Heavy power wiring Includes Ser mos connectors low ohmic losses Officer Bill Grlggs Utica NY New York State Police Hes very much Electric regular KRC Electric Flys model Swizzle Stick usually Gas-powered built Electric chal lenge cobalt 25 ten 900-mAh cells 10 x 6 prop powers Bill says weighs handfula common problem Gas designs converted Electric Photo below shows motor mounted Foamwrapped RC receiver sits behind motor screws against ply plateanother improvement over stock kit course tail wheel also steerable Freds intentions have realized Spor tique bit smaller peppier stock version latter being favorites too point just show what can done fine stock kit some imag ination creativity brought bear Heres hoping will give some ideas maybe start whole new field enjoyment Electric modelers Just what can YOU make out Amptique Dont bashful Send photos above have Electric fun Remember hobby FUN what its column info comment Amp tique can found Electric columns De cember 1987 February 1988 Readers letters sometimes prompt thought pass along readers such case item Recently letter received asked about suitable switches use arming switches Arming switches discussed column several times including September 1987 sue What wasnt discussedand what prompted readers letterwas switch ratings espe cially current ratings Voltage rating relatively unimportant such switches Ive seen rated least 125 voltsand dont know using 100 cells Obviously just like everything else Elec tric installation arming switches should small light weight possible still intended job small light toggle Continued page 129 z7L Last An Automatic Full-Feathering Adjustable Pitch Propeller An exclusive patented mechanism lets adjust pitch 840o optimum perfor mance blades automa tically feather motor stops reduce drag give much Recommended 72-80 motor gliders similar models wing loads up 14 ozI sq ft 05 direct drive systems i/a drive shaft Stock No MAO8XXE $2495 Suggested Retail Available Through Leading Distributors WINDSOR PROPELLER CO 384 Tesconl Ct Santa Rosa CA 95401 Span8in Length66 Wing area 1213 sq Weight.. 165 lbs Power035-040 G38-G62 FM lit $21500 plus shippIng 81100 Everything scratch kit pius pra-cut wood parts complete model DELUXE Nit $28500 plus shipping $1100 Everything tell tIlt bat stth sing spars inataltad sings stab tartle deck hatch 5 fin pra-shbinad sub 116 balsa MAKES htJILDltlB QUiCK *AII wood & foam construction *Fflrglas cowl pants 2-ploco plug-In wings Foam core airt oiled tail surf aces So lail brsce wiret required FOR MORE INFO ONTO PLACE ORDER CONTACT SPIRIT LAKE HOBBIES Ph 712 336-5586 1621 Hill Ave Spirit Lake IA 51360 HOIJIDY Horn hobbype e Kits P& W Model Service 1935 Miss America 84$71961936 Buccaneer 84$5996 1937 Dallaire 108$7516lS3eClipperMkI 72$4156 1938 Klsud King 63$42361938 Powerhouse 94$5356 1938 Record Breaker 96$69561938Trenton Terror72$4576 1939 Korda Wake 44$19161939Mercury 72$5636 1939 Zipper 54$63561940Ranger 46$3196 1940 Sailplane 76$84761940So Long 55$3036 1941 Brigidier 56$4t761941Soper Quaker 78$7276 1941 PIayhoyJr 54$3116 1941 Playboy Sr55$5116 1941 Brooklyn Dodoer 56 64236 Midway Model Co Full Kits 1936 Flying Quakor 84$64761938Powerhoune 50$2996 1937 Long Cabin 78$47161939A T SporIser 50$2996 1937 Quaker FlasS 67$45561940Buzzard Bombshell 1937 Air Cbiel 61$3596 72 span kit$5696 1840 New Rsler74$7116 55apanldt$3596 above kiss qualify Sans events FE & RIG feature highest quality machine cot & sanded pans oil sheet & strip wood wire & window material Moss plans ibe origins FE models easily convenible 3ch RIC Sailpianes Electric Power Gas Kits jQQELCQELECTRIC MODEL DESIGN Ganree HLG 60$2400Shy Knight 44 05 Dl$2400 Gmme2M Glider78$37n6EledraGide II 73 050$3100 Fast Eddie 05 Di$2400 Lightning 36 05 0$2400 UtraMblV OSG$3796 ThermicTraveller I5SDorG$310t hledric Playboy 55 G $2600 Habby Ham Senanar Glider 78 05 electrIc $1800 Astro Challenger 05 Geared $3250 Asim Viking 05 Geared $3250 Asim Portedield 15 0125 Geared $5996 Astro Sport 37 05 Direct $2996 Daveyn Robin 05 Geared $3371 Daseys Le Crate 05 Geared $3596 FULL LiNE OF ELECTRIC SYIcTF PARTE AVAIl SHIPPING & HANDLING76 Page CATALOGUE Up $500 add$250$2GG pp/las Cluss free $801 1052000 add$250when requested order $2001 Ia $4500 udd$325 $4501 1057000 add$375HOBBY HORN Over $7000 add$450 CA Addressees add 6% las Send 3 Moran St IA] MO VISA/ MC 8 & top Check Bos 2212 allow up 1030 days tarcheckWestminster Ca 92684 clearance 593-8311 COD t charges plus $150Hra Mon-Fri 9AM- 5PM bundling ICush Only June 1988 43 New Frond Aeewboiic DuJg 114 Stand-nfl Scale Kit $10300 plus shipping $1100 Ceut pants cannily inning par plans tasm coma tar shig tal lartacas taftin dack hatch AbIELWLiW WE ARE SHOOTING DOWN NIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only ULU SHUTS 36 41 30 1162 33 3322 40 1/8 243 316248 14 2 58 132337 120337 1163 374931 332k 3445637 18 3547146 3/163628255 1/4 3738561 516385110 3/8 38612471 1/2 3110155 3/4 3165191 1/164587648 3/324 7094 56 1/6 460106 66 9164 93122 75 1/4 4110134 64 3/8 4165225139 1/2 261 MATCHED SHEETS 42 3324100 164106 3164120 144131 3ALU STICKS 3645 1/16 1214 3/32 1410 3/32 3812 332 11216 19 606 16 141116 1/6 361216 1/8 121924 3/163/161116 316 3/61720 315 122230 14 141624 1/4 361926 1/4 1/22130 14 343444 1414055 5/165162126 3/8 382737 3/8 123246 36 3/44255 3/615270 12 1123653 12 344662 1/215678 5/6 584865 34 3/46780 BALSA HOT LINE Cell SOs 7454394 lOem-& pm Central Time LONE STAR MODELS 1623 57th St Lubbock IX 79412 F SAL BA TRIANGLES 36 141/425 3/83630 1/21/235 343445 155 BALM PLANKS 36 1185 12150 13200 14280 1123275 1124360 22225 23325 24435 33495 34668 TAPERED SHEETS 36 1/4265 1/4385 36269 3/6398 1/23120 LONE STAR EPOXY 9,Lit.895 5r,i596 30 ri596 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1/323 /203 /163 323 56 183 163 43 /63 115 1/23 139 343 220 13 300 1164 32 4 /64 100 3/164 117 1/44 139 364 207 1/24 282 TRAILING EDGE 36 1/4132 5161 1439 361 1/246 1/2270 INSTANT IL UE 1, Thck 296 1 oTh, 296 2 Thick 550 2, 75/ 556 BASSWOOD45 3/163/1626 3/161/430 3/163/839 3/161/246 3/163/460 1/41442 143649 143460 3/63860 3/61/270 3/63490 1/21/290 1/234100 BUNDLE DEALS 20-116336685 201164361020 203/32 33684 15332 436955 151/6336715 104/6436675 153/16336900 103/16436810 101/4336630 101/4436690 103/8 336650 536439625 51/2336540 51/24361055 103/32448645 51/8448465 5-316 448565 514448625 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 41 181/81522 181/41824 1/93/82029 316 3/162534 1/4 1/43145 14 3/83650 1/41/24565 3/6 3/64563 3/61/25570 1/2X 1/26060 1/2346868 SPRUCE TRIANGLES 3/8 3/8 1/2 1/2 34 34 1/8 6 1/612 1/412 HARD MAPLE 143/8 36 812 3934 12 34 B 40 45 50 58 59 BIRCH DO WELS36 1809 31611 1414 51625 3532 3PLYBIRCH41 6412630 13212445 11612455 812450 SPLYBINCH 3/2212 1/612 3631612 45l/4X12 013/812 1/2412 41 596 625 625 625 725 900 LITE PLY 41GROOVED LG MOUNTS 13 Inches 1503/83/4/1/8/40 3003/83145/32/40 4751/234l3/16/45 Cost 45 Handling Charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept Visa Master Card persosal check, COO 60051 Ia, Te6s US Curr600y Mirmm Wacd Order 51000 V TN 37075 producing some pretcy sporty aero modeling trophies awards engraves em free has club/chapter insignia duplication service chatll produce distinctive prizes con tests fly-ins catalog $2and well worth youre CD looking crophies Jims prices reasonable well flying season beginning across country seems like good time co interrupt readingso can go out fresh air FLY Back atcha next month RC Electrics/Kopski Continued page 43 switches favorites arming switches just arent available current ratings consistent large 20 amps todays mo tors draw would seem Well worry Ive using miniature toggle switches rated between five 10 amps years no problems fact manufacturers know supply systems too Ex amples include Astro DSC five amps Kyosho six amps So low ratings work OK higher currents answer lies partly operative word arming As explained referenced article arming switches like main switches power systems also clude radio-operated power controls like elec tronic switches relays speed controls latter devices operate radio command ultimately control power flow battery motor arming switch simply enables circuit power controls free intended job Thus arming switch first turned radio-operated controls normally still Off no power flows motor through tog gle switch other words arming switches switch cold used activate power flow RC devices Used way tiny light toggle switches take very little electrical abuse contacts simply subjected arcing spark ing would case alone controlled motor power As result quite fail ure-free case despite fact motor current ultimately flows through can exceed ratings factor three five times what about same switches used primary OnIOff control motor power such servo driven An other good question certainly true latter application quite abusive No doubt about have used small toggles way too guess what work pretty good BUT unlike used arming switches have fail direct control appli cation Such failures take form erratic intermittent operation and/or considerable ohmic loss latter always results switches getting quite warm hot occurrences notwithstanding usu ally give good service flights before such symptoms show up can re placed coo great expense course in-flight failure always possibility should pose coo serious problem planes pilots So againnot worry asked about index Electric columns seems reader cuts saves articles say finds difficult find something remembers having seen some time along way have no current index avail able time Ive thinking about de veloping last time column listed index September 85 issue covered writings beginning Septem ber 83 Look update index later year Some reader feedback March 88 column concerning new Astro 02/035 gear drive has come column described new Part No 4046 all-metal gear drive fits ferrite 05 motors well intended As tro cobalts gear drive very similar As tro drives recent years larger cobalt mo tors very rugged should solve problems associated small A-in output shafts used other 05 drives reader has told replacing drive Leisure LT 50 motor Astro part biggest problem encountered doing getting old pinion small gear off motor shaft As suggestion try first covering open ings front end bell tape care fully slit gear between teeth Dremel tool cutoff wheel can done several places desired pinion gear can split off motor shaft nutcracker tool suspect slit gear could also opened up just about kind driving wedge such old sharpened screwdriver perhaps small chisel Whatever sure properly support motor motor shaft place jeopardy gear-splitting necessary gear Another reader question recently received Continued page 133 June 1988 129 RC Electrics/Kopski Continued page 129 pressed well onto motor shaft close motors end bell such gear puller can engaged tape end bell pre vent motor magnets sucking metal particles liberated grinding process Finally original pinion removed new Astro pinion can pressed place best done carefully drill press some other type press Whatever dont bang motor shaft gear hammering device Doing almost certain give regrets Ive installed 4046 several ferrites find shim usually needed between mo tor front-end bell back surface gear drive housing properly space engage new gears shim generally about / % thick depending motor gear place ment etc suggest using some noncompressible substance like sheet aluminum modeling ply wood cardboard such back tablet paper thin stack index card material Cut shim fully back up space between drive housing front end bell DO NOT recommend spacing done just flat washers gear housing mounting screwsan easy action tempting its simplic ity does afford satisfactory sup port drive Motors Ive run 4046 include couple Kyoshos DSC Great Planes Thrustmaster old Astro can motor Interest ingly enough DSC good choice drive because timed run best clock wise direction means motor brush angle such motor runs efficiently used reversing gear drives like 4046 mostbut allothers As far can tell Thrustmaster timed close neutral runs about equally well CW CCW Both economy motors have fixed adjustable considerable ef fort timing Later columns will include some performance information bench runs various motors props used Astro 4046 gear drive Thus ends another fun exchange Please forward comment question SASE please address given top first page column Happy Silent Electric Landings Everyone RC Aerobatics/Van Putte Continued page 45 roughly twice height divided average chord effective aerodynamic surface highest aspect ratio given area Which has higher aspect ratio Figure 2 Figure 3 Figure 3 course Since Ive care fully drawn both have same area fin Figure 3 has greater effectiveness Figure 2 Area increase way increase vertical fin effectiveness Have ever won dered fancy wing tip additions improve wing performance reason work cause increase effective aspect ratio wing actually fool air mol ecules thinking going past longer wing higher aspect ratio tip plates winglets conical tips fences really work well wings Unfortunately some work well direction youre just trying produce lift thats fine However vertical fins need work both directions artificial aspect ratio improver works well vertical fins tip plate design tip plate critical long covers tip has width least three times maximum thickness tip course make tip plate very big will very effective youll have another horizon tal tail up too will also note addition verticalfin tip plate will increase rudder effectiveness works same reason increases verti cal fin effectiveness Does mean best cures ver tical fins always increasing fin aspect ratio adding tip plates Unfortunately no have Pattern airplane both cures tend produce adverse roll Right rud der applied airplane tends roll left vice versa happens wing dihedral needs increased Airplane design full compro mises like RC Scale/Wischers Continued page 47 cern blessed today abundance fine finishing materials having controlled shrink age silk-and-dope finishes entailed end less series steps obliterate balsa grain respectable finish Scale model Silk soft thin flexible pulls down balsa grain doesnt matter whether balsa grain filled before after covering weight addition filler about equal silk itself introduc es pattern weave needs filled really smooth finish old system past required coats dope mixed talcum powder applied brush sanding carefully tween coats assure removing filler coats cutting silk underneath final talc coat sealed sprayed coat clear dope Without step talcum powder would leach back final color coats dull finish silk-and-dope method finishing can still followed Scale modelers dont object multiple steps much time spent pro cess Its popularity has diminished some old-timers continue use lengthy process modern surface-preparation technique substructure beneath less important can fill bare balsa K&B primer follow di rectly paint short process isnt used models prefer harden surface fabric coverings Koverall Super Coy erite silk use filler areas need perfectly smooth Fiberglass surfaces provide surprisingly lightweight cover supplies strength exterior also re quire filling schedule before final color coats extra strengthening provided fi bergiass can sometimes mean reduced structure beneath Pilot sculptures comes time stan dard hobby shop dummy pilots doni fit appli cation Wrong size apparel reasons re jection decide become amateur sculp tors make own materials probably already workshop small blocks bass wood leftover chunks styrene foam Bass wood carves well demands bit deft carv ing skill render psuedo-human likeness An THE LEADER IN COMPETITION NEW 15 DIA 116 NEW PRO SERIES 3 II \ / NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 634 72833/,456 833/,4568 9 4566A77/ 10 6W8W 10 6EW II 4677/7h78 11 5W 11 6EW ll/ 67 12 4W 12 5W 12 56 13 56 14 56 15 56 16 4/N 16 678 RCPYLON RACING SERIES 500 DIA PITCHPRICE 7 SN 5/N 8I 6778 SERIES 400C 86677/7 9 777 W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS 4 DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP PRICE 66 Iz 7 7 I/ 677 Ia 8 677/a 8 67 678 June 1988 133
Edition: Model Aviation - 1988/06
Page Numbers: 42, 43, 129, 133
AN ELECTRIC MEET has announced Ahe Westmoreland Electric Soaring Society Pittsburgh PA area July 17 1988 event will held Mon Valley RC Club field located state park read ily accessible Exit 8 New Stanton Pennsylvania Turnpike Bob Maride RIM Systems sent early info details can write him Unit #3 Sandy Hill Road RD #6 Irwin PA 15642 Dont let Soaring part club name fool youthose guys fly kinds Elec trics Bob has regular attendee KRC Elec tric Flys past tells WESS group has 29 active Electric fliers its own Puget Sound Electric Model Fliers PSEMF has announced preliminary plans two-day Electric fly-in scheduled June 25-25 1988 PSEMF special-interest group within larger Boeing Hawks RC Club meet will held club field Kent WA Prizes will awarded biggest smal lest aerobatic best Scale other things can get info contacting Bernard Cawley 29838 48th Ave South Auburn WA 98001 write either Bob Bernard, tell em Bob sent ya Heres final clue Identity Mystery Electric pictured April May co lumns Take close look nameplate still cant guess read column find outl Note over-and-under air Intake scoops show landing gear below Mys tery plane attached ply plate fuselage bottom four nylon landing gear straps Go gear mysterious hand both lighter faster replacement RIM has few new Electric products forthco ming soon include new gear drives 05s Ugh hare such nomenclature Gas en gines gas engines electric motors adjustable audible peak charger alarm Fifty cents same address will get RIM catalog Folding props K&W pictured dis cussed detail March 88 column cluded time comment respect growing prop line Just show adjective teeth K&W has just expanded its already HUGE line two new sizes 7 x 4 12 x 7 So now look prop photo reference column can mentally picture two fans included Check Adver tisers Index K&Ws ad issue giving write details mystery Electric pictured last two columns look em up pictured last time So far write no has guessed what months photo should big help hint everyone Yup Thats right Its Amptique Yes know doesnt look like Amptiquebut thats what Local modeler Fred Ewing models new column built second Amptiquebut obviously personalized liking renamed slightly reflect intent Freds Sportique somewhatreduced-size version very good popu lar Amptique kit Leisure simply chopped off swept tips wing stab changed V dihedral otherwise personalized em bellished wheel pants canopy other goodies ya gotta admit Sportique sure pretty power system another geared Leisure LT SOon seven 800-mAh cells 10 x 6 set blades controlled Jomar SC-5 speed control As Ive often said speed control adds LOT flying dimension Electrics strongly encourage consideration adding existing new models Other mods Amptique include en larged air intake exit system get bat tery coolingsomething thats much needed stock kit Also landing gear assembly held fuselage bottom LG straps 42 Model Aviation Radio Confrol Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Incidental above announcement word Ted Davey head modeler Davey Sys tems Corp DSC Malvern PA Hes holding sorta-Elndecker derived Champion kit DSC acquired Champion last summer Motatlon provided DSC Hyperthrust 075 motor seven SR 900-mAh cells 8 x 4 prop Hell make deal package kitlmotor/wirlng/prop photo Dr Cohn McKinleys Ann Arbor Ml huge Powerhouse January 88 Issue Heres mounted Astro 60 cobalt motor has tour brushes instead usual two found smaller As tro motors Heavy power wiring Includes Ser mos connectors low ohmic losses Officer Bill Grlggs Utica NY New York State Police Hes very much Electric regular KRC Electric Flys model Swizzle Stick usually Gas-powered built Electric chal lenge cobalt 25 ten 900-mAh cells 10 x 6 prop powers Bill says weighs handfula common problem Gas designs converted Electric Photo below shows motor mounted Foamwrapped RC receiver sits behind motor screws against ply plateanother improvement over stock kit course tail wheel also steerable Freds intentions have realized Spor tique bit smaller peppier stock version latter being favorites too point just show what can done fine stock kit some imag ination creativity brought bear Heres hoping will give some ideas maybe start whole new field enjoyment Electric modelers Just what can YOU make out Amptique Dont bashful Send photos above have Electric fun Remember hobby FUN what its column info comment Amp tique can found Electric columns De cember 1987 February 1988 Readers letters sometimes prompt thought pass along readers such case item Recently letter received asked about suitable switches use arming switches Arming switches discussed column several times including September 1987 sue What wasnt discussedand what prompted readers letterwas switch ratings espe cially current ratings Voltage rating relatively unimportant such switches Ive seen rated least 125 voltsand dont know using 100 cells Obviously just like everything else Elec tric installation arming switches should small light weight possible still intended job small light toggle Continued page 129 z7L Last An Automatic Full-Feathering Adjustable Pitch Propeller An exclusive patented mechanism lets adjust pitch 840o optimum perfor mance blades automa tically feather motor stops reduce drag give much Recommended 72-80 motor gliders similar models wing loads up 14 ozI sq ft 05 direct drive systems i/a drive shaft Stock No MAO8XXE $2495 Suggested Retail Available Through Leading Distributors WINDSOR PROPELLER CO 384 Tesconl Ct Santa Rosa CA 95401 Span8in Length66 Wing area 1213 sq Weight.. 165 lbs Power035-040 G38-G62 FM lit $21500 plus shippIng 81100 Everything scratch kit pius pra-cut wood parts complete model DELUXE Nit $28500 plus shipping $1100 Everything tell tIlt bat stth sing spars inataltad sings stab tartle deck hatch 5 fin pra-shbinad sub 116 balsa MAKES htJILDltlB QUiCK *AII wood & foam construction *Fflrglas cowl pants 2-ploco plug-In wings Foam core airt oiled tail surf aces So lail brsce wiret required FOR MORE INFO ONTO PLACE ORDER CONTACT SPIRIT LAKE HOBBIES Ph 712 336-5586 1621 Hill Ave Spirit Lake IA 51360 HOIJIDY Horn hobbype e Kits P& W Model Service 1935 Miss America 84$71961936 Buccaneer 84$5996 1937 Dallaire 108$7516lS3eClipperMkI 72$4156 1938 Klsud King 63$42361938 Powerhouse 94$5356 1938 Record Breaker 96$69561938Trenton Terror72$4576 1939 Korda Wake 44$19161939Mercury 72$5636 1939 Zipper 54$63561940Ranger 46$3196 1940 Sailplane 76$84761940So Long 55$3036 1941 Brigidier 56$4t761941Soper Quaker 78$7276 1941 PIayhoyJr 54$3116 1941 Playboy Sr55$5116 1941 Brooklyn Dodoer 56 64236 Midway Model Co Full Kits 1936 Flying Quakor 84$64761938Powerhoune 50$2996 1937 Long Cabin 78$47161939A T SporIser 50$2996 1937 Quaker FlasS 67$45561940Buzzard Bombshell 1937 Air Cbiel 61$3596 72 span kit$5696 1840 New Rsler74$7116 55apanldt$3596 above kiss qualify Sans events FE & RIG feature highest quality machine cot & sanded pans oil sheet & strip wood wire & window material Moss plans ibe origins FE models easily convenible 3ch RIC Sailpianes Electric Power Gas Kits jQQELCQELECTRIC MODEL DESIGN Ganree HLG 60$2400Shy Knight 44 05 Dl$2400 Gmme2M Glider78$37n6EledraGide II 73 050$3100 Fast Eddie 05 Di$2400 Lightning 36 05 0$2400 UtraMblV OSG$3796 ThermicTraveller I5SDorG$310t hledric Playboy 55 G $2600 Habby Ham Senanar Glider 78 05 electrIc $1800 Astro Challenger 05 Geared $3250 Asim Viking 05 Geared $3250 Asim Portedield 15 0125 Geared $5996 Astro Sport 37 05 Direct $2996 Daveyn Robin 05 Geared $3371 Daseys Le Crate 05 Geared $3596 FULL LiNE OF ELECTRIC SYIcTF PARTE AVAIl SHIPPING & HANDLING76 Page CATALOGUE Up $500 add$250$2GG pp/las Cluss free $801 1052000 add$250when requested order $2001 Ia $4500 udd$325 $4501 1057000 add$375HOBBY HORN Over $7000 add$450 CA Addressees add 6% las Send 3 Moran St IA] MO VISA/ MC 8 & top Check Bos 2212 allow up 1030 days tarcheckWestminster Ca 92684 clearance 593-8311 COD t charges plus $150Hra Mon-Fri 9AM- 5PM bundling ICush Only June 1988 43 New Frond Aeewboiic DuJg 114 Stand-nfl Scale Kit $10300 plus shipping $1100 Ceut pants cannily inning par plans tasm coma tar shig tal lartacas taftin dack hatch AbIELWLiW WE ARE SHOOTING DOWN NIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only ULU SHUTS 36 41 30 1162 33 3322 40 1/8 243 316248 14 2 58 132337 120337 1163 374931 332k 3445637 18 3547146 3/163628255 1/4 3738561 516385110 3/8 38612471 1/2 3110155 3/4 3165191 1/164587648 3/324 7094 56 1/6 460106 66 9164 93122 75 1/4 4110134 64 3/8 4165225139 1/2 261 MATCHED SHEETS 42 3324100 164106 3164120 144131 3ALU STICKS 3645 1/16 1214 3/32 1410 3/32 3812 332 11216 19 606 16 141116 1/6 361216 1/8 121924 3/163/161116 316 3/61720 315 122230 14 141624 1/4 361926 1/4 1/22130 14 343444 1414055 5/165162126 3/8 382737 3/8 123246 36 3/44255 3/615270 12 1123653 12 344662 1/215678 5/6 584865 34 3/46780 BALSA HOT LINE Cell SOs 7454394 lOem-& pm Central Time LONE STAR MODELS 1623 57th St Lubbock IX 79412 F SAL BA TRIANGLES 36 141/425 3/83630 1/21/235 343445 155 BALM PLANKS 36 1185 12150 13200 14280 1123275 1124360 22225 23325 24435 33495 34668 TAPERED SHEETS 36 1/4265 1/4385 36269 3/6398 1/23120 LONE STAR EPOXY 9,Lit.895 5r,i596 30 ri596 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1/323 /203 /163 323 56 183 163 43 /63 115 1/23 139 343 220 13 300 1164 32 4 /64 100 3/164 117 1/44 139 364 207 1/24 282 TRAILING EDGE 36 1/4132 5161 1439 361 1/246 1/2270 INSTANT IL UE 1, Thck 296 1 oTh, 296 2 Thick 550 2, 75/ 556 BASSWOOD45 3/163/1626 3/161/430 3/163/839 3/161/246 3/163/460 1/41442 143649 143460 3/63860 3/61/270 3/63490 1/21/290 1/234100 BUNDLE DEALS 20-116336685 201164361020 203/32 33684 15332 436955 151/6336715 104/6436675 153/16336900 103/16436810 101/4336630 101/4436690 103/8 336650 536439625 51/2336540 51/24361055 103/32448645 51/8448465 5-316 448565 514448625 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 41 181/81522 181/41824 1/93/82029 316 3/162534 1/4 1/43145 14 3/83650 1/41/24565 3/6 3/64563 3/61/25570 1/2X 1/26060 1/2346868 SPRUCE TRIANGLES 3/8 3/8 1/2 1/2 34 34 1/8 6 1/612 1/412 HARD MAPLE 143/8 36 812 3934 12 34 B 40 45 50 58 59 BIRCH DO WELS36 1809 31611 1414 51625 3532 3PLYBIRCH41 6412630 13212445 11612455 812450 SPLYBINCH 3/2212 1/612 3631612 45l/4X12 013/812 1/2412 41 596 625 625 625 725 900 LITE PLY 41GROOVED LG MOUNTS 13 Inches 1503/83/4/1/8/40 3003/83145/32/40 4751/234l3/16/45 Cost 45 Handling Charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept Visa Master Card persosal check, COO 60051 Ia, Te6s US Curr600y Mirmm Wacd Order 51000 V TN 37075 producing some pretcy sporty aero modeling trophies awards engraves em free has club/chapter insignia duplication service chatll produce distinctive prizes con tests fly-ins catalog $2and well worth youre CD looking crophies Jims prices reasonable well flying season beginning across country seems like good time co interrupt readingso can go out fresh air FLY Back atcha next month RC Electrics/Kopski Continued page 43 switches favorites arming switches just arent available current ratings consistent large 20 amps todays mo tors draw would seem Well worry Ive using miniature toggle switches rated between five 10 amps years no problems fact manufacturers know supply systems too Ex amples include Astro DSC five amps Kyosho six amps So low ratings work OK higher currents answer lies partly operative word arming As explained referenced article arming switches like main switches power systems also clude radio-operated power controls like elec tronic switches relays speed controls latter devices operate radio command ultimately control power flow battery motor arming switch simply enables circuit power controls free intended job Thus arming switch first turned radio-operated controls normally still Off no power flows motor through tog gle switch other words arming switches switch cold used activate power flow RC devices Used way tiny light toggle switches take very little electrical abuse contacts simply subjected arcing spark ing would case alone controlled motor power As result quite fail ure-free case despite fact motor current ultimately flows through can exceed ratings factor three five times what about same switches used primary OnIOff control motor power such servo driven An other good question certainly true latter application quite abusive No doubt about have used small toggles way too guess what work pretty good BUT unlike used arming switches have fail direct control appli cation Such failures take form erratic intermittent operation and/or considerable ohmic loss latter always results switches getting quite warm hot occurrences notwithstanding usu ally give good service flights before such symptoms show up can re placed coo great expense course in-flight failure always possibility should pose coo serious problem planes pilots So againnot worry asked about index Electric columns seems reader cuts saves articles say finds difficult find something remembers having seen some time along way have no current index avail able time Ive thinking about de veloping last time column listed index September 85 issue covered writings beginning Septem ber 83 Look update index later year Some reader feedback March 88 column concerning new Astro 02/035 gear drive has come column described new Part No 4046 all-metal gear drive fits ferrite 05 motors well intended As tro cobalts gear drive very similar As tro drives recent years larger cobalt mo tors very rugged should solve problems associated small A-in output shafts used other 05 drives reader has told replacing drive Leisure LT 50 motor Astro part biggest problem encountered doing getting old pinion small gear off motor shaft As suggestion try first covering open ings front end bell tape care fully slit gear between teeth Dremel tool cutoff wheel can done several places desired pinion gear can split off motor shaft nutcracker tool suspect slit gear could also opened up just about kind driving wedge such old sharpened screwdriver perhaps small chisel Whatever sure properly support motor motor shaft place jeopardy gear-splitting necessary gear Another reader question recently received Continued page 133 June 1988 129 RC Electrics/Kopski Continued page 129 pressed well onto motor shaft close motors end bell such gear puller can engaged tape end bell pre vent motor magnets sucking metal particles liberated grinding process Finally original pinion removed new Astro pinion can pressed place best done carefully drill press some other type press Whatever dont bang motor shaft gear hammering device Doing almost certain give regrets Ive installed 4046 several ferrites find shim usually needed between mo tor front-end bell back surface gear drive housing properly space engage new gears shim generally about / % thick depending motor gear place ment etc suggest using some noncompressible substance like sheet aluminum modeling ply wood cardboard such back tablet paper thin stack index card material Cut shim fully back up space between drive housing front end bell DO NOT recommend spacing done just flat washers gear housing mounting screwsan easy action tempting its simplic ity does afford satisfactory sup port drive Motors Ive run 4046 include couple Kyoshos DSC Great Planes Thrustmaster old Astro can motor Interest ingly enough DSC good choice drive because timed run best clock wise direction means motor brush angle such motor runs efficiently used reversing gear drives like 4046 mostbut allothers As far can tell Thrustmaster timed close neutral runs about equally well CW CCW Both economy motors have fixed adjustable considerable ef fort timing Later columns will include some performance information bench runs various motors props used Astro 4046 gear drive Thus ends another fun exchange Please forward comment question SASE please address given top first page column Happy Silent Electric Landings Everyone RC Aerobatics/Van Putte Continued page 45 roughly twice height divided average chord effective aerodynamic surface highest aspect ratio given area Which has higher aspect ratio Figure 2 Figure 3 Figure 3 course Since Ive care fully drawn both have same area fin Figure 3 has greater effectiveness Figure 2 Area increase way increase vertical fin effectiveness Have ever won dered fancy wing tip additions improve wing performance reason work cause increase effective aspect ratio wing actually fool air mol ecules thinking going past longer wing higher aspect ratio tip plates winglets conical tips fences really work well wings Unfortunately some work well direction youre just trying produce lift thats fine However vertical fins need work both directions artificial aspect ratio improver works well vertical fins tip plate design tip plate critical long covers tip has width least three times maximum thickness tip course make tip plate very big will very effective youll have another horizon tal tail up too will also note addition verticalfin tip plate will increase rudder effectiveness works same reason increases verti cal fin effectiveness Does mean best cures ver tical fins always increasing fin aspect ratio adding tip plates Unfortunately no have Pattern airplane both cures tend produce adverse roll Right rud der applied airplane tends roll left vice versa happens wing dihedral needs increased Airplane design full compro mises like RC Scale/Wischers Continued page 47 cern blessed today abundance fine finishing materials having controlled shrink age silk-and-dope finishes entailed end less series steps obliterate balsa grain respectable finish Scale model Silk soft thin flexible pulls down balsa grain doesnt matter whether balsa grain filled before after covering weight addition filler about equal silk itself introduc es pattern weave needs filled really smooth finish old system past required coats dope mixed talcum powder applied brush sanding carefully tween coats assure removing filler coats cutting silk underneath final talc coat sealed sprayed coat clear dope Without step talcum powder would leach back final color coats dull finish silk-and-dope method finishing can still followed Scale modelers dont object multiple steps much time spent pro cess Its popularity has diminished some old-timers continue use lengthy process modern surface-preparation technique substructure beneath less important can fill bare balsa K&B primer follow di rectly paint short process isnt used models prefer harden surface fabric coverings Koverall Super Coy erite silk use filler areas need perfectly smooth Fiberglass surfaces provide surprisingly lightweight cover supplies strength exterior also re quire filling schedule before final color coats extra strengthening provided fi bergiass can sometimes mean reduced structure beneath Pilot sculptures comes time stan dard hobby shop dummy pilots doni fit appli cation Wrong size apparel reasons re jection decide become amateur sculp tors make own materials probably already workshop small blocks bass wood leftover chunks styrene foam Bass wood carves well demands bit deft carv ing skill render psuedo-human likeness An THE LEADER IN COMPETITION NEW 15 DIA 116 NEW PRO SERIES 3 II \ / NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 634 72833/,456 833/,4568 9 4566A77/ 10 6W8W 10 6EW II 4677/7h78 11 5W 11 6EW ll/ 67 12 4W 12 5W 12 56 13 56 14 56 15 56 16 4/N 16 678 RCPYLON RACING SERIES 500 DIA PITCHPRICE 7 SN 5/N 8I 6778 SERIES 400C 86677/7 9 777 W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS 4 DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP PRICE 66 Iz 7 7 I/ 677 Ia 8 677/a 8 67 678 June 1988 133
Edition: Model Aviation - 1988/06
Page Numbers: 42, 43, 129, 133
AN ELECTRIC MEET has announced Ahe Westmoreland Electric Soaring Society Pittsburgh PA area July 17 1988 event will held Mon Valley RC Club field located state park read ily accessible Exit 8 New Stanton Pennsylvania Turnpike Bob Maride RIM Systems sent early info details can write him Unit #3 Sandy Hill Road RD #6 Irwin PA 15642 Dont let Soaring part club name fool youthose guys fly kinds Elec trics Bob has regular attendee KRC Elec tric Flys past tells WESS group has 29 active Electric fliers its own Puget Sound Electric Model Fliers PSEMF has announced preliminary plans two-day Electric fly-in scheduled June 25-25 1988 PSEMF special-interest group within larger Boeing Hawks RC Club meet will held club field Kent WA Prizes will awarded biggest smal lest aerobatic best Scale other things can get info contacting Bernard Cawley 29838 48th Ave South Auburn WA 98001 write either Bob Bernard, tell em Bob sent ya Heres final clue Identity Mystery Electric pictured April May co lumns Take close look nameplate still cant guess read column find outl Note over-and-under air Intake scoops show landing gear below Mys tery plane attached ply plate fuselage bottom four nylon landing gear straps Go gear mysterious hand both lighter faster replacement RIM has few new Electric products forthco ming soon include new gear drives 05s Ugh hare such nomenclature Gas en gines gas engines electric motors adjustable audible peak charger alarm Fifty cents same address will get RIM catalog Folding props K&W pictured dis cussed detail March 88 column cluded time comment respect growing prop line Just show adjective teeth K&W has just expanded its already HUGE line two new sizes 7 x 4 12 x 7 So now look prop photo reference column can mentally picture two fans included Check Adver tisers Index K&Ws ad issue giving write details mystery Electric pictured last two columns look em up pictured last time So far write no has guessed what months photo should big help hint everyone Yup Thats right Its Amptique Yes know doesnt look like Amptiquebut thats what Local modeler Fred Ewing models new column built second Amptiquebut obviously personalized liking renamed slightly reflect intent Freds Sportique somewhatreduced-size version very good popu lar Amptique kit Leisure simply chopped off swept tips wing stab changed V dihedral otherwise personalized em bellished wheel pants canopy other goodies ya gotta admit Sportique sure pretty power system another geared Leisure LT SOon seven 800-mAh cells 10 x 6 set blades controlled Jomar SC-5 speed control As Ive often said speed control adds LOT flying dimension Electrics strongly encourage consideration adding existing new models Other mods Amptique include en larged air intake exit system get bat tery coolingsomething thats much needed stock kit Also landing gear assembly held fuselage bottom LG straps 42 Model Aviation Radio Confrol Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Incidental above announcement word Ted Davey head modeler Davey Sys tems Corp DSC Malvern PA Hes holding sorta-Elndecker derived Champion kit DSC acquired Champion last summer Motatlon provided DSC Hyperthrust 075 motor seven SR 900-mAh cells 8 x 4 prop Hell make deal package kitlmotor/wirlng/prop photo Dr Cohn McKinleys Ann Arbor Ml huge Powerhouse January 88 Issue Heres mounted Astro 60 cobalt motor has tour brushes instead usual two found smaller As tro motors Heavy power wiring Includes Ser mos connectors low ohmic losses Officer Bill Grlggs Utica NY New York State Police Hes very much Electric regular KRC Electric Flys model Swizzle Stick usually Gas-powered built Electric chal lenge cobalt 25 ten 900-mAh cells 10 x 6 prop powers Bill says weighs handfula common problem Gas designs converted Electric Photo below shows motor mounted Foamwrapped RC receiver sits behind motor screws against ply plateanother improvement over stock kit course tail wheel also steerable Freds intentions have realized Spor tique bit smaller peppier stock version latter being favorites too point just show what can done fine stock kit some imag ination creativity brought bear Heres hoping will give some ideas maybe start whole new field enjoyment Electric modelers Just what can YOU make out Amptique Dont bashful Send photos above have Electric fun Remember hobby FUN what its column info comment Amp tique can found Electric columns De cember 1987 February 1988 Readers letters sometimes prompt thought pass along readers such case item Recently letter received asked about suitable switches use arming switches Arming switches discussed column several times including September 1987 sue What wasnt discussedand what prompted readers letterwas switch ratings espe cially current ratings Voltage rating relatively unimportant such switches Ive seen rated least 125 voltsand dont know using 100 cells Obviously just like everything else Elec tric installation arming switches should small light weight possible still intended job small light toggle Continued page 129 z7L Last An Automatic Full-Feathering Adjustable Pitch Propeller An exclusive patented mechanism lets adjust pitch 840o optimum perfor mance blades automa tically feather motor stops reduce drag give much Recommended 72-80 motor gliders similar models wing loads up 14 ozI sq ft 05 direct drive systems i/a drive shaft Stock No MAO8XXE $2495 Suggested Retail Available Through Leading Distributors WINDSOR PROPELLER CO 384 Tesconl Ct Santa Rosa CA 95401 Span8in Length66 Wing area 1213 sq Weight.. 165 lbs Power035-040 G38-G62 FM lit $21500 plus shippIng 81100 Everything scratch kit pius pra-cut wood parts complete model DELUXE Nit $28500 plus shipping $1100 Everything tell tIlt bat stth sing spars inataltad sings stab tartle deck hatch 5 fin pra-shbinad sub 116 balsa MAKES htJILDltlB QUiCK *AII wood & foam construction *Fflrglas cowl pants 2-ploco plug-In wings Foam core airt oiled tail surf aces So lail brsce wiret required FOR MORE INFO ONTO PLACE ORDER CONTACT SPIRIT LAKE HOBBIES Ph 712 336-5586 1621 Hill Ave Spirit Lake IA 51360 HOIJIDY Horn hobbype e Kits P& W Model Service 1935 Miss America 84$71961936 Buccaneer 84$5996 1937 Dallaire 108$7516lS3eClipperMkI 72$4156 1938 Klsud King 63$42361938 Powerhouse 94$5356 1938 Record Breaker 96$69561938Trenton Terror72$4576 1939 Korda Wake 44$19161939Mercury 72$5636 1939 Zipper 54$63561940Ranger 46$3196 1940 Sailplane 76$84761940So Long 55$3036 1941 Brigidier 56$4t761941Soper Quaker 78$7276 1941 PIayhoyJr 54$3116 1941 Playboy Sr55$5116 1941 Brooklyn Dodoer 56 64236 Midway Model Co Full Kits 1936 Flying Quakor 84$64761938Powerhoune 50$2996 1937 Long Cabin 78$47161939A T SporIser 50$2996 1937 Quaker FlasS 67$45561940Buzzard Bombshell 1937 Air Cbiel 61$3596 72 span kit$5696 1840 New Rsler74$7116 55apanldt$3596 above kiss qualify Sans events FE & RIG feature highest quality machine cot & sanded pans oil sheet & strip wood wire & window material Moss plans ibe origins FE models easily convenible 3ch RIC Sailpianes Electric Power Gas Kits jQQELCQELECTRIC MODEL DESIGN Ganree HLG 60$2400Shy Knight 44 05 Dl$2400 Gmme2M Glider78$37n6EledraGide II 73 050$3100 Fast Eddie 05 Di$2400 Lightning 36 05 0$2400 UtraMblV OSG$3796 ThermicTraveller I5SDorG$310t hledric Playboy 55 G $2600 Habby Ham Senanar Glider 78 05 electrIc $1800 Astro Challenger 05 Geared $3250 Asim Viking 05 Geared $3250 Asim Portedield 15 0125 Geared $5996 Astro Sport 37 05 Direct $2996 Daveyn Robin 05 Geared $3371 Daseys Le Crate 05 Geared $3596 FULL LiNE OF ELECTRIC SYIcTF PARTE AVAIl SHIPPING & HANDLING76 Page CATALOGUE Up $500 add$250$2GG pp/las Cluss free $801 1052000 add$250when requested order $2001 Ia $4500 udd$325 $4501 1057000 add$375HOBBY HORN Over $7000 add$450 CA Addressees add 6% las Send 3 Moran St IA] MO VISA/ MC 8 & top Check Bos 2212 allow up 1030 days tarcheckWestminster Ca 92684 clearance 593-8311 COD t charges plus $150Hra Mon-Fri 9AM- 5PM bundling ICush Only June 1988 43 New Frond Aeewboiic DuJg 114 Stand-nfl Scale Kit $10300 plus shipping $1100 Ceut pants cannily inning par plans tasm coma tar shig tal lartacas taftin dack hatch AbIELWLiW WE ARE SHOOTING DOWN NIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only ULU SHUTS 36 41 30 1162 33 3322 40 1/8 243 316248 14 2 58 132337 120337 1163 374931 332k 3445637 18 3547146 3/163628255 1/4 3738561 516385110 3/8 38612471 1/2 3110155 3/4 3165191 1/164587648 3/324 7094 56 1/6 460106 66 9164 93122 75 1/4 4110134 64 3/8 4165225139 1/2 261 MATCHED SHEETS 42 3324100 164106 3164120 144131 3ALU STICKS 3645 1/16 1214 3/32 1410 3/32 3812 332 11216 19 606 16 141116 1/6 361216 1/8 121924 3/163/161116 316 3/61720 315 122230 14 141624 1/4 361926 1/4 1/22130 14 343444 1414055 5/165162126 3/8 382737 3/8 123246 36 3/44255 3/615270 12 1123653 12 344662 1/215678 5/6 584865 34 3/46780 BALSA HOT LINE Cell SOs 7454394 lOem-& pm Central Time LONE STAR MODELS 1623 57th St Lubbock IX 79412 F SAL BA TRIANGLES 36 141/425 3/83630 1/21/235 343445 155 BALM PLANKS 36 1185 12150 13200 14280 1123275 1124360 22225 23325 24435 33495 34668 TAPERED SHEETS 36 1/4265 1/4385 36269 3/6398 1/23120 LONE STAR EPOXY 9,Lit.895 5r,i596 30 ri596 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1/323 /203 /163 323 56 183 163 43 /63 115 1/23 139 343 220 13 300 1164 32 4 /64 100 3/164 117 1/44 139 364 207 1/24 282 TRAILING EDGE 36 1/4132 5161 1439 361 1/246 1/2270 INSTANT IL UE 1, Thck 296 1 oTh, 296 2 Thick 550 2, 75/ 556 BASSWOOD45 3/163/1626 3/161/430 3/163/839 3/161/246 3/163/460 1/41442 143649 143460 3/63860 3/61/270 3/63490 1/21/290 1/234100 BUNDLE DEALS 20-116336685 201164361020 203/32 33684 15332 436955 151/6336715 104/6436675 153/16336900 103/16436810 101/4336630 101/4436690 103/8 336650 536439625 51/2336540 51/24361055 103/32448645 51/8448465 5-316 448565 514448625 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 41 181/81522 181/41824 1/93/82029 316 3/162534 1/4 1/43145 14 3/83650 1/41/24565 3/6 3/64563 3/61/25570 1/2X 1/26060 1/2346868 SPRUCE TRIANGLES 3/8 3/8 1/2 1/2 34 34 1/8 6 1/612 1/412 HARD MAPLE 143/8 36 812 3934 12 34 B 40 45 50 58 59 BIRCH DO WELS36 1809 31611 1414 51625 3532 3PLYBIRCH41 6412630 13212445 11612455 812450 SPLYBINCH 3/2212 1/612 3631612 45l/4X12 013/812 1/2412 41 596 625 625 625 725 900 LITE PLY 41GROOVED LG MOUNTS 13 Inches 1503/83/4/1/8/40 3003/83145/32/40 4751/234l3/16/45 Cost 45 Handling Charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept Visa Master Card persosal check, COO 60051 Ia, Te6s US Curr600y Mirmm Wacd Order 51000 V TN 37075 producing some pretcy sporty aero modeling trophies awards engraves em free has club/chapter insignia duplication service chatll produce distinctive prizes con tests fly-ins catalog $2and well worth youre CD looking crophies Jims prices reasonable well flying season beginning across country seems like good time co interrupt readingso can go out fresh air FLY Back atcha next month RC Electrics/Kopski Continued page 43 switches favorites arming switches just arent available current ratings consistent large 20 amps todays mo tors draw would seem Well worry Ive using miniature toggle switches rated between five 10 amps years no problems fact manufacturers know supply systems too Ex amples include Astro DSC five amps Kyosho six amps So low ratings work OK higher currents answer lies partly operative word arming As explained referenced article arming switches like main switches power systems also clude radio-operated power controls like elec tronic switches relays speed controls latter devices operate radio command ultimately control power flow battery motor arming switch simply enables circuit power controls free intended job Thus arming switch first turned radio-operated controls normally still Off no power flows motor through tog gle switch other words arming switches switch cold used activate power flow RC devices Used way tiny light toggle switches take very little electrical abuse contacts simply subjected arcing spark ing would case alone controlled motor power As result quite fail ure-free case despite fact motor current ultimately flows through can exceed ratings factor three five times what about same switches used primary OnIOff control motor power such servo driven An other good question certainly true latter application quite abusive No doubt about have used small toggles way too guess what work pretty good BUT unlike used arming switches have fail direct control appli cation Such failures take form erratic intermittent operation and/or considerable ohmic loss latter always results switches getting quite warm hot occurrences notwithstanding usu ally give good service flights before such symptoms show up can re placed coo great expense course in-flight failure always possibility should pose coo serious problem planes pilots So againnot worry asked about index Electric columns seems reader cuts saves articles say finds difficult find something remembers having seen some time along way have no current index avail able time Ive thinking about de veloping last time column listed index September 85 issue covered writings beginning Septem ber 83 Look update index later year Some reader feedback March 88 column concerning new Astro 02/035 gear drive has come column described new Part No 4046 all-metal gear drive fits ferrite 05 motors well intended As tro cobalts gear drive very similar As tro drives recent years larger cobalt mo tors very rugged should solve problems associated small A-in output shafts used other 05 drives reader has told replacing drive Leisure LT 50 motor Astro part biggest problem encountered doing getting old pinion small gear off motor shaft As suggestion try first covering open ings front end bell tape care fully slit gear between teeth Dremel tool cutoff wheel can done several places desired pinion gear can split off motor shaft nutcracker tool suspect slit gear could also opened up just about kind driving wedge such old sharpened screwdriver perhaps small chisel Whatever sure properly support motor motor shaft place jeopardy gear-splitting necessary gear Another reader question recently received Continued page 133 June 1988 129 RC Electrics/Kopski Continued page 129 pressed well onto motor shaft close motors end bell such gear puller can engaged tape end bell pre vent motor magnets sucking metal particles liberated grinding process Finally original pinion removed new Astro pinion can pressed place best done carefully drill press some other type press Whatever dont bang motor shaft gear hammering device Doing almost certain give regrets Ive installed 4046 several ferrites find shim usually needed between mo tor front-end bell back surface gear drive housing properly space engage new gears shim generally about / % thick depending motor gear place ment etc suggest using some noncompressible substance like sheet aluminum modeling ply wood cardboard such back tablet paper thin stack index card material Cut shim fully back up space between drive housing front end bell DO NOT recommend spacing done just flat washers gear housing mounting screwsan easy action tempting its simplic ity does afford satisfactory sup port drive Motors Ive run 4046 include couple Kyoshos DSC Great Planes Thrustmaster old Astro can motor Interest ingly enough DSC good choice drive because timed run best clock wise direction means motor brush angle such motor runs efficiently used reversing gear drives like 4046 mostbut allothers As far can tell Thrustmaster timed close neutral runs about equally well CW CCW Both economy motors have fixed adjustable considerable ef fort timing Later columns will include some performance information bench runs various motors props used Astro 4046 gear drive Thus ends another fun exchange Please forward comment question SASE please address given top first page column Happy Silent Electric Landings Everyone RC Aerobatics/Van Putte Continued page 45 roughly twice height divided average chord effective aerodynamic surface highest aspect ratio given area Which has higher aspect ratio Figure 2 Figure 3 Figure 3 course Since Ive care fully drawn both have same area fin Figure 3 has greater effectiveness Figure 2 Area increase way increase vertical fin effectiveness Have ever won dered fancy wing tip additions improve wing performance reason work cause increase effective aspect ratio wing actually fool air mol ecules thinking going past longer wing higher aspect ratio tip plates winglets conical tips fences really work well wings Unfortunately some work well direction youre just trying produce lift thats fine However vertical fins need work both directions artificial aspect ratio improver works well vertical fins tip plate design tip plate critical long covers tip has width least three times maximum thickness tip course make tip plate very big will very effective youll have another horizon tal tail up too will also note addition verticalfin tip plate will increase rudder effectiveness works same reason increases verti cal fin effectiveness Does mean best cures ver tical fins always increasing fin aspect ratio adding tip plates Unfortunately no have Pattern airplane both cures tend produce adverse roll Right rud der applied airplane tends roll left vice versa happens wing dihedral needs increased Airplane design full compro mises like RC Scale/Wischers Continued page 47 cern blessed today abundance fine finishing materials having controlled shrink age silk-and-dope finishes entailed end less series steps obliterate balsa grain respectable finish Scale model Silk soft thin flexible pulls down balsa grain doesnt matter whether balsa grain filled before after covering weight addition filler about equal silk itself introduc es pattern weave needs filled really smooth finish old system past required coats dope mixed talcum powder applied brush sanding carefully tween coats assure removing filler coats cutting silk underneath final talc coat sealed sprayed coat clear dope Without step talcum powder would leach back final color coats dull finish silk-and-dope method finishing can still followed Scale modelers dont object multiple steps much time spent pro cess Its popularity has diminished some old-timers continue use lengthy process modern surface-preparation technique substructure beneath less important can fill bare balsa K&B primer follow di rectly paint short process isnt used models prefer harden surface fabric coverings Koverall Super Coy erite silk use filler areas need perfectly smooth Fiberglass surfaces provide surprisingly lightweight cover supplies strength exterior also re quire filling schedule before final color coats extra strengthening provided fi bergiass can sometimes mean reduced structure beneath Pilot sculptures comes time stan dard hobby shop dummy pilots doni fit appli cation Wrong size apparel reasons re jection decide become amateur sculp tors make own materials probably already workshop small blocks bass wood leftover chunks styrene foam Bass wood carves well demands bit deft carv ing skill render psuedo-human likeness An THE LEADER IN COMPETITION NEW 15 DIA 116 NEW PRO SERIES 3 II \ / NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 634 72833/,456 833/,4568 9 4566A77/ 10 6W8W 10 6EW II 4677/7h78 11 5W 11 6EW ll/ 67 12 4W 12 5W 12 56 13 56 14 56 15 56 16 4/N 16 678 RCPYLON RACING SERIES 500 DIA PITCHPRICE 7 SN 5/N 8I 6778 SERIES 400C 86677/7 9 777 W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS 4 DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP PRICE 66 Iz 7 7 I/ 677 Ia 8 677/a 8 67 678 June 1988 133
Edition: Model Aviation - 1988/06
Page Numbers: 42, 43, 129, 133
AN ELECTRIC MEET has announced Ahe Westmoreland Electric Soaring Society Pittsburgh PA area July 17 1988 event will held Mon Valley RC Club field located state park read ily accessible Exit 8 New Stanton Pennsylvania Turnpike Bob Maride RIM Systems sent early info details can write him Unit #3 Sandy Hill Road RD #6 Irwin PA 15642 Dont let Soaring part club name fool youthose guys fly kinds Elec trics Bob has regular attendee KRC Elec tric Flys past tells WESS group has 29 active Electric fliers its own Puget Sound Electric Model Fliers PSEMF has announced preliminary plans two-day Electric fly-in scheduled June 25-25 1988 PSEMF special-interest group within larger Boeing Hawks RC Club meet will held club field Kent WA Prizes will awarded biggest smal lest aerobatic best Scale other things can get info contacting Bernard Cawley 29838 48th Ave South Auburn WA 98001 write either Bob Bernard, tell em Bob sent ya Heres final clue Identity Mystery Electric pictured April May co lumns Take close look nameplate still cant guess read column find outl Note over-and-under air Intake scoops show landing gear below Mys tery plane attached ply plate fuselage bottom four nylon landing gear straps Go gear mysterious hand both lighter faster replacement RIM has few new Electric products forthco ming soon include new gear drives 05s Ugh hare such nomenclature Gas en gines gas engines electric motors adjustable audible peak charger alarm Fifty cents same address will get RIM catalog Folding props K&W pictured dis cussed detail March 88 column cluded time comment respect growing prop line Just show adjective teeth K&W has just expanded its already HUGE line two new sizes 7 x 4 12 x 7 So now look prop photo reference column can mentally picture two fans included Check Adver tisers Index K&Ws ad issue giving write details mystery Electric pictured last two columns look em up pictured last time So far write no has guessed what months photo should big help hint everyone Yup Thats right Its Amptique Yes know doesnt look like Amptiquebut thats what Local modeler Fred Ewing models new column built second Amptiquebut obviously personalized liking renamed slightly reflect intent Freds Sportique somewhatreduced-size version very good popu lar Amptique kit Leisure simply chopped off swept tips wing stab changed V dihedral otherwise personalized em bellished wheel pants canopy other goodies ya gotta admit Sportique sure pretty power system another geared Leisure LT SOon seven 800-mAh cells 10 x 6 set blades controlled Jomar SC-5 speed control As Ive often said speed control adds LOT flying dimension Electrics strongly encourage consideration adding existing new models Other mods Amptique include en larged air intake exit system get bat tery coolingsomething thats much needed stock kit Also landing gear assembly held fuselage bottom LG straps 42 Model Aviation Radio Confrol Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Incidental above announcement word Ted Davey head modeler Davey Sys tems Corp DSC Malvern PA Hes holding sorta-Elndecker derived Champion kit DSC acquired Champion last summer Motatlon provided DSC Hyperthrust 075 motor seven SR 900-mAh cells 8 x 4 prop Hell make deal package kitlmotor/wirlng/prop photo Dr Cohn McKinleys Ann Arbor Ml huge Powerhouse January 88 Issue Heres mounted Astro 60 cobalt motor has tour brushes instead usual two found smaller As tro motors Heavy power wiring Includes Ser mos connectors low ohmic losses Officer Bill Grlggs Utica NY New York State Police Hes very much Electric regular KRC Electric Flys model Swizzle Stick usually Gas-powered built Electric chal lenge cobalt 25 ten 900-mAh cells 10 x 6 prop powers Bill says weighs handfula common problem Gas designs converted Electric Photo below shows motor mounted Foamwrapped RC receiver sits behind motor screws against ply plateanother improvement over stock kit course tail wheel also steerable Freds intentions have realized Spor tique bit smaller peppier stock version latter being favorites too point just show what can done fine stock kit some imag ination creativity brought bear Heres hoping will give some ideas maybe start whole new field enjoyment Electric modelers Just what can YOU make out Amptique Dont bashful Send photos above have Electric fun Remember hobby FUN what its column info comment Amp tique can found Electric columns De cember 1987 February 1988 Readers letters sometimes prompt thought pass along readers such case item Recently letter received asked about suitable switches use arming switches Arming switches discussed column several times including September 1987 sue What wasnt discussedand what prompted readers letterwas switch ratings espe cially current ratings Voltage rating relatively unimportant such switches Ive seen rated least 125 voltsand dont know using 100 cells Obviously just like everything else Elec tric installation arming switches should small light weight possible still intended job small light toggle Continued page 129 z7L Last An Automatic Full-Feathering Adjustable Pitch Propeller An exclusive patented mechanism lets adjust pitch 840o optimum perfor mance blades automa tically feather motor stops reduce drag give much Recommended 72-80 motor gliders similar models wing loads up 14 ozI sq ft 05 direct drive systems i/a drive shaft Stock No MAO8XXE $2495 Suggested Retail Available Through Leading Distributors WINDSOR PROPELLER CO 384 Tesconl Ct Santa Rosa CA 95401 Span8in Length66 Wing area 1213 sq Weight.. 165 lbs Power035-040 G38-G62 FM lit $21500 plus shippIng 81100 Everything scratch kit pius pra-cut wood parts complete model DELUXE Nit $28500 plus shipping $1100 Everything tell tIlt bat stth sing spars inataltad sings stab tartle deck hatch 5 fin pra-shbinad sub 116 balsa MAKES htJILDltlB QUiCK *AII wood & foam construction *Fflrglas cowl pants 2-ploco plug-In wings Foam core airt oiled tail surf aces So lail brsce wiret required FOR MORE INFO ONTO PLACE ORDER CONTACT SPIRIT LAKE HOBBIES Ph 712 336-5586 1621 Hill Ave Spirit Lake IA 51360 HOIJIDY Horn hobbype e Kits P& W Model Service 1935 Miss America 84$71961936 Buccaneer 84$5996 1937 Dallaire 108$7516lS3eClipperMkI 72$4156 1938 Klsud King 63$42361938 Powerhouse 94$5356 1938 Record Breaker 96$69561938Trenton Terror72$4576 1939 Korda Wake 44$19161939Mercury 72$5636 1939 Zipper 54$63561940Ranger 46$3196 1940 Sailplane 76$84761940So Long 55$3036 1941 Brigidier 56$4t761941Soper Quaker 78$7276 1941 PIayhoyJr 54$3116 1941 Playboy Sr55$5116 1941 Brooklyn Dodoer 56 64236 Midway Model Co Full Kits 1936 Flying Quakor 84$64761938Powerhoune 50$2996 1937 Long Cabin 78$47161939A T SporIser 50$2996 1937 Quaker FlasS 67$45561940Buzzard Bombshell 1937 Air Cbiel 61$3596 72 span kit$5696 1840 New Rsler74$7116 55apanldt$3596 above kiss qualify Sans events FE & RIG feature highest quality machine cot & sanded pans oil sheet & strip wood wire & window material Moss plans ibe origins FE models easily convenible 3ch RIC Sailpianes Electric Power Gas Kits jQQELCQELECTRIC MODEL DESIGN Ganree HLG 60$2400Shy Knight 44 05 Dl$2400 Gmme2M Glider78$37n6EledraGide II 73 050$3100 Fast Eddie 05 Di$2400 Lightning 36 05 0$2400 UtraMblV OSG$3796 ThermicTraveller I5SDorG$310t hledric Playboy 55 G $2600 Habby Ham Senanar Glider 78 05 electrIc $1800 Astro Challenger 05 Geared $3250 Asim Viking 05 Geared $3250 Asim Portedield 15 0125 Geared $5996 Astro Sport 37 05 Direct $2996 Daveyn Robin 05 Geared $3371 Daseys Le Crate 05 Geared $3596 FULL LiNE OF ELECTRIC SYIcTF PARTE AVAIl SHIPPING & HANDLING76 Page CATALOGUE Up $500 add$250$2GG pp/las Cluss free $801 1052000 add$250when requested order $2001 Ia $4500 udd$325 $4501 1057000 add$375HOBBY HORN Over $7000 add$450 CA Addressees add 6% las Send 3 Moran St IA] MO VISA/ MC 8 & top Check Bos 2212 allow up 1030 days tarcheckWestminster Ca 92684 clearance 593-8311 COD t charges plus $150Hra Mon-Fri 9AM- 5PM bundling ICush Only June 1988 43 New Frond Aeewboiic DuJg 114 Stand-nfl Scale Kit $10300 plus shipping $1100 Ceut pants cannily inning par plans tasm coma tar shig tal lartacas taftin dack hatch AbIELWLiW WE ARE SHOOTING DOWN NIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only ULU SHUTS 36 41 30 1162 33 3322 40 1/8 243 316248 14 2 58 132337 120337 1163 374931 332k 3445637 18 3547146 3/163628255 1/4 3738561 516385110 3/8 38612471 1/2 3110155 3/4 3165191 1/164587648 3/324 7094 56 1/6 460106 66 9164 93122 75 1/4 4110134 64 3/8 4165225139 1/2 261 MATCHED SHEETS 42 3324100 164106 3164120 144131 3ALU STICKS 3645 1/16 1214 3/32 1410 3/32 3812 332 11216 19 606 16 141116 1/6 361216 1/8 121924 3/163/161116 316 3/61720 315 122230 14 141624 1/4 361926 1/4 1/22130 14 343444 1414055 5/165162126 3/8 382737 3/8 123246 36 3/44255 3/615270 12 1123653 12 344662 1/215678 5/6 584865 34 3/46780 BALSA HOT LINE Cell SOs 7454394 lOem-& pm Central Time LONE STAR MODELS 1623 57th St Lubbock IX 79412 F SAL BA TRIANGLES 36 141/425 3/83630 1/21/235 343445 155 BALM PLANKS 36 1185 12150 13200 14280 1123275 1124360 22225 23325 24435 33495 34668 TAPERED SHEETS 36 1/4265 1/4385 36269 3/6398 1/23120 LONE STAR EPOXY 9,Lit.895 5r,i596 30 ri596 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa LIGHT 4-6 LB WOOD36 1/323 /203 /163 323 56 183 163 43 /63 115 1/23 139 343 220 13 300 1164 32 4 /64 100 3/164 117 1/44 139 364 207 1/24 282 TRAILING EDGE 36 1/4132 5161 1439 361 1/246 1/2270 INSTANT IL UE 1, Thck 296 1 oTh, 296 2 Thick 550 2, 75/ 556 BASSWOOD45 3/163/1626 3/161/430 3/163/839 3/161/246 3/163/460 1/41442 143649 143460 3/63860 3/61/270 3/63490 1/21/290 1/234100 BUNDLE DEALS 20-116336685 201164361020 203/32 33684 15332 436955 151/6336715 104/6436675 153/16336900 103/16436810 101/4336630 101/4436690 103/8 336650 536439625 51/2336540 51/24361055 103/32448645 51/8448465 5-316 448565 514448625 * NEW * Hundreds new sizes accessories finishing materials Send #10 SASE latest catalog SPRUCE STICKS 36 41 181/81522 181/41824 1/93/82029 316 3/162534 1/4 1/43145 14 3/83650 1/41/24565 3/6 3/64563 3/61/25570 1/2X 1/26060 1/2346868 SPRUCE TRIANGLES 3/8 3/8 1/2 1/2 34 34 1/8 6 1/612 1/412 HARD MAPLE 143/8 36 812 3934 12 34 B 40 45 50 58 59 BIRCH DO WELS36 1809 31611 1414 51625 3532 3PLYBIRCH41 6412630 13212445 11612455 812450 SPLYBINCH 3/2212 1/612 3631612 45l/4X12 013/812 1/2412 41 596 625 625 625 725 900 LITE PLY 41GROOVED LG MOUNTS 13 Inches 1503/83/4/1/8/40 3003/83145/32/40 4751/234l3/16/45 Cost 45 Handling Charge W pay UPS Add $250 COD $300 extra PP APO FPO Statee accept Visa Master Card persosal check, COO 60051 Ia, Te6s US Curr600y Mirmm Wacd Order 51000 V TN 37075 producing some pretcy sporty aero modeling trophies awards engraves em free has club/chapter insignia duplication service chatll produce distinctive prizes con tests fly-ins catalog $2and well worth youre CD looking crophies Jims prices reasonable well flying season beginning across country seems like good time co interrupt readingso can go out fresh air FLY Back atcha next month RC Electrics/Kopski Continued page 43 switches favorites arming switches just arent available current ratings consistent large 20 amps todays mo tors draw would seem Well worry Ive using miniature toggle switches rated between five 10 amps years no problems fact manufacturers know supply systems too Ex amples include Astro DSC five amps Kyosho six amps So low ratings work OK higher currents answer lies partly operative word arming As explained referenced article arming switches like main switches power systems also clude radio-operated power controls like elec tronic switches relays speed controls latter devices operate radio command ultimately control power flow battery motor arming switch simply enables circuit power controls free intended job Thus arming switch first turned radio-operated controls normally still Off no power flows motor through tog gle switch other words arming switches switch cold used activate power flow RC devices Used way tiny light toggle switches take very little electrical abuse contacts simply subjected arcing spark ing would case alone controlled motor power As result quite fail ure-free case despite fact motor current ultimately flows through can exceed ratings factor three five times what about same switches used primary OnIOff control motor power such servo driven An other good question certainly true latter application quite abusive No doubt about have used small toggles way too guess what work pretty good BUT unlike used arming switches have fail direct control appli cation Such failures take form erratic intermittent operation and/or considerable ohmic loss latter always results switches getting quite warm hot occurrences notwithstanding usu ally give good service flights before such symptoms show up can re placed coo great expense course in-flight failure always possibility should pose coo serious problem planes pilots So againnot worry asked about index Electric columns seems reader cuts saves articles say finds difficult find something remembers having seen some time along way have no current index avail able time Ive thinking about de veloping last time column listed index September 85 issue covered writings beginning Septem ber 83 Look update index later year Some reader feedback March 88 column concerning new Astro 02/035 gear drive has come column described new Part No 4046 all-metal gear drive fits ferrite 05 motors well intended As tro cobalts gear drive very similar As tro drives recent years larger cobalt mo tors very rugged should solve problems associated small A-in output shafts used other 05 drives reader has told replacing drive Leisure LT 50 motor Astro part biggest problem encountered doing getting old pinion small gear off motor shaft As suggestion try first covering open ings front end bell tape care fully slit gear between teeth Dremel tool cutoff wheel can done several places desired pinion gear can split off motor shaft nutcracker tool suspect slit gear could also opened up just about kind driving wedge such old sharpened screwdriver perhaps small chisel Whatever sure properly support motor motor shaft place jeopardy gear-splitting necessary gear Another reader question recently received Continued page 133 June 1988 129 RC Electrics/Kopski Continued page 129 pressed well onto motor shaft close motors end bell such gear puller can engaged tape end bell pre vent motor magnets sucking metal particles liberated grinding process Finally original pinion removed new Astro pinion can pressed place best done carefully drill press some other type press Whatever dont bang motor shaft gear hammering device Doing almost certain give regrets Ive installed 4046 several ferrites find shim usually needed between mo tor front-end bell back surface gear drive housing properly space engage new gears shim generally about / % thick depending motor gear place ment etc suggest using some noncompressible substance like sheet aluminum modeling ply wood cardboard such back tablet paper thin stack index card material Cut shim fully back up space between drive housing front end bell DO NOT recommend spacing done just flat washers gear housing mounting screwsan easy action tempting its simplic ity does afford satisfactory sup port drive Motors Ive run 4046 include couple Kyoshos DSC Great Planes Thrustmaster old Astro can motor Interest ingly enough DSC good choice drive because timed run best clock wise direction means motor brush angle such motor runs efficiently used reversing gear drives like 4046 mostbut allothers As far can tell Thrustmaster timed close neutral runs about equally well CW CCW Both economy motors have fixed adjustable considerable ef fort timing Later columns will include some performance information bench runs various motors props used Astro 4046 gear drive Thus ends another fun exchange Please forward comment question SASE please address given top first page column Happy Silent Electric Landings Everyone RC Aerobatics/Van Putte Continued page 45 roughly twice height divided average chord effective aerodynamic surface highest aspect ratio given area Which has higher aspect ratio Figure 2 Figure 3 Figure 3 course Since Ive care fully drawn both have same area fin Figure 3 has greater effectiveness Figure 2 Area increase way increase vertical fin effectiveness Have ever won dered fancy wing tip additions improve wing performance reason work cause increase effective aspect ratio wing actually fool air mol ecules thinking going past longer wing higher aspect ratio tip plates winglets conical tips fences really work well wings Unfortunately some work well direction youre just trying produce lift thats fine However vertical fins need work both directions artificial aspect ratio improver works well vertical fins tip plate design tip plate critical long covers tip has width least three times maximum thickness tip course make tip plate very big will very effective youll have another horizon tal tail up too will also note addition verticalfin tip plate will increase rudder effectiveness works same reason increases verti cal fin effectiveness Does mean best cures ver tical fins always increasing fin aspect ratio adding tip plates Unfortunately no have Pattern airplane both cures tend produce adverse roll Right rud der applied airplane tends roll left vice versa happens wing dihedral needs increased Airplane design full compro mises like RC Scale/Wischers Continued page 47 cern blessed today abundance fine finishing materials having controlled shrink age silk-and-dope finishes entailed end less series steps obliterate balsa grain respectable finish Scale model Silk soft thin flexible pulls down balsa grain doesnt matter whether balsa grain filled before after covering weight addition filler about equal silk itself introduc es pattern weave needs filled really smooth finish old system past required coats dope mixed talcum powder applied brush sanding carefully tween coats assure removing filler coats cutting silk underneath final talc coat sealed sprayed coat clear dope Without step talcum powder would leach back final color coats dull finish silk-and-dope method finishing can still followed Scale modelers dont object multiple steps much time spent pro cess Its popularity has diminished some old-timers continue use lengthy process modern surface-preparation technique substructure beneath less important can fill bare balsa K&B primer follow di rectly paint short process isnt used models prefer harden surface fabric coverings Koverall Super Coy erite silk use filler areas need perfectly smooth Fiberglass surfaces provide surprisingly lightweight cover supplies strength exterior also re quire filling schedule before final color coats extra strengthening provided fi bergiass can sometimes mean reduced structure beneath Pilot sculptures comes time stan dard hobby shop dummy pilots doni fit appli cation Wrong size apparel reasons re jection decide become amateur sculp tors make own materials probably already workshop small blocks bass wood leftover chunks styrene foam Bass wood carves well demands bit deft carv ing skill render psuedo-human likeness An THE LEADER IN COMPETITION NEW 15 DIA 116 NEW PRO SERIES 3 II \ / NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 634 72833/,456 833/,4568 9 4566A77/ 10 6W8W 10 6EW II 4677/7h78 11 5W 11 6EW ll/ 67 12 4W 12 5W 12 56 13 56 14 56 15 56 16 4/N 16 678 RCPYLON RACING SERIES 500 DIA PITCHPRICE 7 SN 5/N 8I 6778 SERIES 400C 86677/7 9 777 W WIDE BLADE EW EXTRA WIDE N NARROW PROPELLERS 4 DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALL THE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW PITCH THP PRICE 66 Iz 7 7 I/ 677 Ia 8 677/a 8 67 678 June 1988 133