these probably worth detailing Astrolows automatically AC/DC charger de DC/DC Super Charger frequently used tosigned lesser packs could supply charge larger cell counts can chargedpower input needed bigger charger 12-volt auto battery and/or pop-charge larger packs ______ular AC/DC six-to-seven-cell chargers operat- Heres example Lets say have rou ing AC Assuming normal charging currentstinely used some AC/DC charger charge cell counts ereater eight almost fol-seven-cell 12 Ah pack about 40-45 amps THE MODIFIED Astro DC/DC Super Charg erstill article modifying charger appeared September October 1987 issues continues bring reader response month theres common prob lem frequent question discuss Some readers have experienced peculiar form operation modified chargers wherein charger seems work OK HI/LO switch set HIbut wont work LO setting turns out folks got transistor circuit 180 wrong Admittedly lead arrangement some recom mended transistor options easy confuse some readers accidentally got collector emitter interchanged base connected correctly rotation just happens put transistor so-called inverted mode some transistors can actually functiona little explains almost right charger opera tion sounds like problem have let suggest take another look transis tor lead connections theres chance have incorrect strongly suggest buy new transistor just case correctly substitute wrongly installed charger should work just promised subject articles popular reader question about Astro 102 Super Charger modified whether can powered off house current AC/DC Charger such Astro 4005B shop use NO categoric negative actually does have very limited number possible exceptions Left Nick Spagnuolo Rochester NY 1987 KRC Electric Fly stock-kit ElectriCub Nick brought new model powered seven 800mAh cells Thrustmaster got Keith Shaw check out him has Jomar SC-S power control unit weighs 43 oz ready fly Later Nick installed Cobalt 15 motor tried both 10 12 cells reaction Wow really came alive Right Bruce Fernstermachers Great Planes ElectriCub configured Army 0-59 trainer stock J-3 used 1940-41 era Keystone RC Club member Bruce duplicated markings full-size Fort Rucker recently earned helicopter wings rotors spent extra effort cut down structural weight model Power system stock Thrustmaster six 12Ah cells 48 Model Aviation Radio Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 second series three photo clues mystery Electric introduced last month Hint should able go local hobby store readily get started just like Now can anyone guess what Final photo clue will appear next month An underutilized Cobalt 15 nested neatly Amptique nose earlier geared stallation resided Behind motor Jomar SC-5 on/off switch charge jack connectors Prop 8 x 6 Tornado Energy bank seven 800mAh cells info text -r_ MINI POWER AT ITS BEST t Weight l P-30 Size Models k Gear Ratio t ant Start Cost Battery Power ner PROPULSION SYSTEMS MOTORS vi-ius 95 Includes HY-70B Motor B-62 Battery 2 Props Charge Plug Connector Accessory Pkg screws spacers etc VI-ulOR 5 Same VL-l1lB HY-7OBR Motor Remote Flight Battery Holder KIEJFE MIDWEST WHAT FIX Warranty Service FREQUENCY CONVERSION SI 000 Dienount Regular RepairWfK1i F Moan Makes Models Cenveresd L&~ Tuning Done Spectrum Analyzer Also Service Forfl AE E/ IFIiiiii uad Only Full Time Servlcenter MIdwest 17 East Main St Northvil le Michin 48167 C Upper arrd Phone 1-313-348-0085 44 44 44 thats maximum capability charger moot charger output power about seven cells times 16 volts/cell charg ing times 45 amps about 50 watts Now lets add cell charge larger pack DC/DC Super Charger should clear power delivered battery greater seven-cell & mm mm — pack about 58 watts BUT Super Charger also has efficiency factor less 100% 50 requires input power delivering Taking effi ciency factor 80% example lower yet modified charger its input power must 58 watts output divided 080 80% effi ciency about 72 watts clear such input power demand ex ceeds output power capability pre viously calculated about 50 watts AC/DC charger used example Beyond consideration however fact AC/DC chargers have high line-ripple content outputs due lack filtering fol lowing transformer rectifier circuitry Super Charger designed operate pure DC input have tried theres Continued page 153 May 1988 49 4 4 4 4 4 4 4 4 4 4 4 4 H H H H george snapiick Ringoes NJ LeI sure Lanzo Bomber 1987 Electric Fly returned trip Greece Satur day could attend meet Sundayl Power system geared Cobalt 05 seven SOOmAh celia turning hand-carved 11 x 6 Radio mixes Futaba FM Cannon servos HY-70B$1495 An improved HY-71 Features reinforced prop shaft neoprene sleeve engage disengage Free-wheeling HY-7OBR$1795 Some HY-70B equipped Remote Flight Battery Holder er has 7 leads osick disconnects Slide battery FLIGHT BATTERI B-62 2x50 mAHr 9 gins Snap place motor No wiring renuired 852 2x80 mAHr .... Same 8-62 motor-run 1 minutes 8-63 3a50 mAHr 13 gins. 5 powerful f,fh htar wotnrrzn Du2 0 Carry Largest Only Stock Kraft Parts World.. Kraft alive working smiling fellow winner 1987 KRC Electric Fly Amptique raffle Complete plane less radio built KRC members Lots folks took lots chances win goody Lucky person Dr Joe Kraynak Norristown PA Power system stock geared Leisure 05 seven 800mAh ceils Plane flies superblyas Amptiques PlC Video Tape Vol 1 Basics 115 minuteS total running time .grcat educatLonal value recomniendd clubs hobbs shop owners. Model AviatIon Nov 1987 Only $1795 tax & shipping mci VISA M/C orders call 415 967-5134 Penn International Chemicals 943 Steirlin Rd iew CA 3 m n Road Kunners being successfully flown thin air Wyoming Colorado Eds latest de sign effort amongst nonscale Giants Wily Coyote low-winger 120 igni tion Ed says designed Road Runner eater Right now hes putting through its test paces hope well have photo next months column RC Electrics/Kopski Continued page 49 no point anyway suspect may react ad versely such unfiltered inputs natural follow-up operate-off-shehouse-line question concerns just what can used power large chargers home should clear such line-operated supply has BIG capability such may readily availableand case would quite expensive Just case some desire pursue idea further suggest look 12-volt DC supply capable supplying 20 amps continuously Personally dont know get thats economical Additional relevant discussion can found MA col umn June 87 wherein some thoughts given about bench-running motors January 1988 column featued coverage 1987 KRC Electric Fly have previous first-of-the-year issues covered preceding KRC meets However years coverage has proven different years has brought lots reader reaction questions about people planes pictured also about Electric Fly itselfsomething unusual just seems suddenly readers have become very interested meet response cross section latter questions KRC Electric Fly Keystone Radio Control Club Electric Fly KRC based Hatfield PAabout 35 miles north Philadel phia folks now view annual affair being perhaps largest club-sponsored annual Electric meet world Historically Electric Fly two-day meet having fun-fly format held third weekend September club field Hat field Ninth Annual KRC Electric Fly scheduled September 17-18 1988 proba bly will moved nearby much larger field since meet has outgrown historic site can get detailed information sending SASE CD Bruce Fenstermach er 636 Schoolhouse Rd Telford PA 18969 ElectriCub Great Planes brings its share reader mail months photos clude two examples model have seen both air planes look pretty ground have flown ElectriCub can pass along some input thoughts about As generalization feel kit design heavier need penalty ROG takeoffs attempted stock power system Typically stock power system marginal regardsome Cubs can just barely make off ground some cant option may help problem change six 1 2-Ah cells lighter 800-mAb packs Some modelers have suggested upping six cells seven have oppor tunity bench-run two ElectriCub Thrustmaster motors based data think changing seven 800-mAh cells staying kit-supplied 8 x 4 Tornado prop good idea reference seven cells prop should result average 10500 rpm input current about 19 amps total power input about 135 watts As see just about can expect Thrustmaster han dle still give reasonable motor life fact what would try myself Electri Cub Thrustmaster motor what really would Electri Cub would use 15-size Yuk hate kind size-designation motor speed con trol know Id have model significantly greater capability completely consistent Caliph experience documented heav ily recent columns Like Caliph ElectriCub what call three-pound plane mean almost no matter what because models size structure flying intent state Elec tric theyre gonna come Out weighing some between 2 31A lb Installing 15 sys tem will push upper limit weight range will result plane plenty groundhandling capability some aerobatic cap ability did figure out self have also reader input saying 15 way go Now surely cant wrong right Anyway some specifics Based referenced Caliph work recommend consider powering ElectriCub either ferrite cobalt 15 direct drive 10 12 cells use speed control recommend 8 x 6 nylon prop 10 cells 8 x 4 12 plane think best choice 800 mAh cells 900s second Finally based reader input SURE beef up wing center sec tionyou can loop Cub have build new Continued page 154 May1988 153 49Y&Z//V RADIO CONTROL SHORTKITS FOR 25 TO 45 ENGINES VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL QUALITY PRODUCTS SINCE 1964 THESE TWINS HAVE BEEN DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT AS WITH ALL OF OUR SHORT KITS THEY ARE BUILTAROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION THE SPECIALLY DESIGNED AIRFOILS AND GENEROUS TAIL AREAS GIVE THEM OUTSTANDING FLIGHTPERFORMANCE THROUGH OUT THE ENTIRE SPEED RANGE NEW P-38 LIGHTNING TWIN 706495 N A-26 INVADER TWIN 685495 SHORT 1113 IHCLLIDE WING CORES CANOPIES COWLS PUNS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SHORT HA RD WA RE PA CKA GEAND MATERIALS LIST FOR ADDITIONAL BALSA AND HARDWARE NEEDED OROERINGSENDCHECKORMONEYORDERFORREOUIREDAMOUNT PLUS 450 PER KIT CANADIANS ADD t6S0 TO WING MEG P0 BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESI DENTS ADD 6/% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 350 FOB PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM WING CORES ACCESSORIES KITS TOOLS AND MUCH MORE f/iVG MEG WORLD WAR II FIGHTER SERIES S AGM2 ZERO 54 SPAN 995 P-40 TOMA HA WK55 SPAN. 2995 P-39 AIRA COBRA 55 SPAN . 2995 P-51D MUSTANG 54 SPAN . 2995 C202 FOLGORE 56 SPAN 5 FOCKE WULF 190 54 SPAN. 2995 PHONE 815-459-0417 leads quite naturally continuation topic begun last monthnamely larger power systems using seven cells time indicated personal liking 15-size motors commented versa tility As illustration versatility slow start direction larger sys tems call attention months photos shows cobalt 15 installed believe notan Amptique WOW 15 Amptique must go like No doesnt 15 pictured powered seven 800-mAh cells swings 8 x 6 prop power level very close 05 geared systems popular Amptique plane flies indistinguishably except has lot prop ground clear ance Now would anyone put 15 such underutilization Well George Poos Fort Washington PA got tired bending break ing gear shafts plane also planning new hydro modeliS-sizedin future Knowing suggested get 15 sooner needed later project install temporarily Amptique Static motor data clearly showed motor 8 x 6 prop seven cells already plane should about same system indeed does What makes cobalt 15 practical Amptiquetemporarily notis 15 co balt relatively light small motor weighs about seven ounces physically smaller some 05 ferrites As can seen motor installs easily other 05 planes seven cells require economy charger effect what George now has sort loafing high-capability motor really great plane what also has fine motor reserve just waiting 12-cell pack some plane designed 15-size motor its stuff As noted above point illustrate what meant versatility 15 cobalt add example have personally flown 15s seven eight nine 10 12 cells have witnessed flight 14 cells thats have six motors have pow ered planes 38 oz about 56 oz have used both direct-drive gearedand just motor Now thats versatility know some readers agonize over power system selection starters Ive said times readers feel comfort able Electric actual prior Elec tric experience limited initial economy suggest carefully consider size motor first As described right first plane can delay purchase ad vanced charging system staying seven cells enjoy Electric knowing ye got motor has far capability youre ready use Now Ill betcha never thought approach Electric Elation Before leaving idea entirely must also clude fact used way 15 NOT substitute cobalt 05 ie both seven cells former loafing lat ter would typically maxed-out former running about 90-100 watts input static less half its full capability Beyond should clear same operating cur rent 12 cells 15 results 12/7 times power level 70% 05 cobalt add real zest comparison note 15 05 cobalts just about same size weight chance still some doubts should gone now 15 indeed VERY ver satile includes both cobalt super ferrite lSs latter being larger heav ier functionally same no 05 super ferrite larger power systems future Electric Model Fliers EMF Chicago all-Electric group membership 16 writing have anxiousness attract other modelers same persuasion club has nifty monthly newsletter Current Flow places fly club based Chicago metro area informal fun-fly-orien Continued page 160 Stand Off Scale Extra 230 Kits Now Available Three Sizes 30% Scale Kit ~ pIUB5l5BhIppIBg 113 Scale Kit 96 plus $15 shipping 114 Scale Kit ~ plus 510 shipping Cash VISA Certified Check R/C EXTRAS 712-943-4102 RR1 Box 28B Sergeant Bluff IA 51054 Pat gine NunbtDslanceSize Size 96355 31 9 95 0630019651395 65500553260 901495 0660565329512595 FF7507532 1595 633s130eOaorz FF850 0365 zln 2995 Ie Ii AMERICAN JR OM RIDGE CAMPBELL T RITE DUBRO EASY BUILT MODELS FLYLINE FOX BERG DUBOIS LOW K&B MICRO X OS MAX RA PECK-POLYMER ECT MODELS SEAGLEN STERLING IVAN SUPER TIGRE INDER FLITE LER WILLIAMSS PRODUCTS RS ESTES MODEL ROCKETS Send SI Caub Check Stamp 32 page tabloId duel DISCOUNT Catalog 900 illustrations oFo 700 Kits choose Iron MAILOROER PHONEORDER IN STORE PENN VALLEY HOllY CENTER 837 W Main St Lansiam1a 19446 154 Model Aviation AW7 NEW Scale RFBOO Dual Strut Nose Gear ho liszt hoFO ShiFfung OW ha FullS Tooling PO Box 95 Champaign IL 61820 180260 Octued RC Electrics/Kopski Continued page 154 ted organization members wish promote fact Electrics fly well help new comers Electric endeavor good info came editor Current Flow Steve Moskal Steve can reached 30 S Ken sington Ave LaGrange IL 60525 tele phone number 312 354-2803 Interested mod elers might try giving Steve shout tell im Bob sent yal Andmy own best wishes EMF Oh woe unbounded griefl Another column endingwith much left pass along next month Happy silent landings everyone RC Aerobatics/Van Putte Continued page 51 aileron side wheel want get aileron differential high-wing airplane both techniques must re versed ie bend aileron torque arms back attach pushrods aileron servo wheel side opposite ailerons Doubting Thomas letter writers mailed copy Figure 4 shows what hap pens have equal servo output same both directions low-wing airplane can clearly see Up Down use both techniques youll get differential really surprised number letters received about design tips Id included March 1988 column uniformly en thusiastic support of same kind design ideas So next month Ill include some ideas proper design vertical fin tales about tails RC Pylon Racing/Hager Continued page 52 very consistent work up slowly towards prop speed Take time work fuel system including shutoff until works flawlessly Airplane balance control Another com mon mistake opinion fact people set up airplanes too sensitive controls Concentrate flying smoothly like tame airplane down desensitizing Kits controls Use enough get airplane Item around course Too much throw can get Thunder trouble make erratic flying Use QIt full travel joystick order get maximum resolution feel setup critical surface elevator China Make sure CG comes Out exactly mdi- Clipper cated plans Start off recommend- T-railed ed throws listed plans Fly airplane set throw elevator full stick trav el obtain turns radius slightly smaller 100 ft enough al- Spickler lows start pylon 2-3 turn slowly using maybe half stick travel around No 2 end up Texas Out going around No 3 stick bottomed out law always pull full Up elevator No 1 except first lap Stay same altitude around Scat Cat course Try climb dive too much Next like set ailerons up slow airplane would just barely roll twice going down straights gave full aileron throw set up rudder get minimum travel possible smallest servo output wheel using farthest hole control horn throw ends up too much fore takeoff end up using about V Right rudder travel stick closing want stress again pure speed what wins race Being consistent flying smooth tight wins race Thanks Tom rest list people compa nies sell Racing products list began April 1988 column Quickie 500 Manufact urer Phone Address Pauls Fly 619 743ing Stuff 5458 Paul Steinberg Model Tech California Speed Products PO Box 121 Escondido CA 92025 Hobby Stores 714 661- 32221 Alipaz #15 7430 San Juan Capistrano CA 92675 Hobby Stores Spickler Models Ritchs 713 661Hobbies 5458 Dick Ritch Flue Line Models 4104 Lark Houston TX 77025 Hobby Stores Continued page 162 install hinges hate Try Easy Hinges See Difference single slol s few drops C/A glue ssd its dsne No geuging pinning sr hinge pins wsrrs absuf Iscredibly strssg Virtually indeslructible 24 hinges 295 e e4 oa Za en INE PO Box 1743 Marcos CA 92069 flUe W fl1SiX V1W CWit fl5 LW ISUhuhIt ccie Ia m5uled Hal & mnd Lanai Wzdsgl j um _ntomrss 4 Power Only certified checks money orders accepsed Minimum order S1OO0to three packases 4 Powerpoles 5315 per pasfsage siCto shipping Sendlinat CT rnsidenfs add 75% sales tao Prices sabiect c5angenithosf notion DEALER iNQUiRIES INVITED farther information deale prices send SASh Basiness Card SERMOS RIC SNAP CONNECTORS Cedas Canes S Box 16787 Slanted CT 069203322-6294 160 Model Aviation qowsagSnrx zun IW Cussomlzed nawest German engInes noefrom vault Muffiw Mount MountIng Bolts y Presmirs Tap Smoke Carburetor LInkage CDI IgnltlonfCl4 EleclronloaL 48 Volt IgnitIon Pack Safety a0 Sitdi SIx-Bolt Hub ResIstor Spark Plugs Veer Wanenty Faulty Paresand WakmuultIp TaG MFG 857 High Mountain Rd North Haledon TO Law 200ulyRowhi Glese body wheel pant. end cowl P ft N5flO 51011 Poem wing al bale Included Sach 31 wllh points Included avahleblel Mw2pI--mn-i EDO FLOATS /a SCALE 46 LONG SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST P0 Box 306 MA ~ PosI Falls ID 83854 yr 081 7739001
Edition: Model Aviation - 1988/05
Page Numbers: 48, 49, 153, 154, 160
these probably worth detailing Astrolows automatically AC/DC charger de DC/DC Super Charger frequently used tosigned lesser packs could supply charge larger cell counts can chargedpower input needed bigger charger 12-volt auto battery and/or pop-charge larger packs ______ular AC/DC six-to-seven-cell chargers operat- Heres example Lets say have rou ing AC Assuming normal charging currentstinely used some AC/DC charger charge cell counts ereater eight almost fol-seven-cell 12 Ah pack about 40-45 amps THE MODIFIED Astro DC/DC Super Charg erstill article modifying charger appeared September October 1987 issues continues bring reader response month theres common prob lem frequent question discuss Some readers have experienced peculiar form operation modified chargers wherein charger seems work OK HI/LO switch set HIbut wont work LO setting turns out folks got transistor circuit 180 wrong Admittedly lead arrangement some recom mended transistor options easy confuse some readers accidentally got collector emitter interchanged base connected correctly rotation just happens put transistor so-called inverted mode some transistors can actually functiona little explains almost right charger opera tion sounds like problem have let suggest take another look transis tor lead connections theres chance have incorrect strongly suggest buy new transistor just case correctly substitute wrongly installed charger should work just promised subject articles popular reader question about Astro 102 Super Charger modified whether can powered off house current AC/DC Charger such Astro 4005B shop use NO categoric negative actually does have very limited number possible exceptions Left Nick Spagnuolo Rochester NY 1987 KRC Electric Fly stock-kit ElectriCub Nick brought new model powered seven 800mAh cells Thrustmaster got Keith Shaw check out him has Jomar SC-S power control unit weighs 43 oz ready fly Later Nick installed Cobalt 15 motor tried both 10 12 cells reaction Wow really came alive Right Bruce Fernstermachers Great Planes ElectriCub configured Army 0-59 trainer stock J-3 used 1940-41 era Keystone RC Club member Bruce duplicated markings full-size Fort Rucker recently earned helicopter wings rotors spent extra effort cut down structural weight model Power system stock Thrustmaster six 12Ah cells 48 Model Aviation Radio Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 second series three photo clues mystery Electric introduced last month Hint should able go local hobby store readily get started just like Now can anyone guess what Final photo clue will appear next month An underutilized Cobalt 15 nested neatly Amptique nose earlier geared stallation resided Behind motor Jomar SC-5 on/off switch charge jack connectors Prop 8 x 6 Tornado Energy bank seven 800mAh cells info text -r_ MINI POWER AT ITS BEST t Weight l P-30 Size Models k Gear Ratio t ant Start Cost Battery Power ner PROPULSION SYSTEMS MOTORS vi-ius 95 Includes HY-70B Motor B-62 Battery 2 Props Charge Plug Connector Accessory Pkg screws spacers etc VI-ulOR 5 Same VL-l1lB HY-7OBR Motor Remote Flight Battery Holder KIEJFE MIDWEST WHAT FIX Warranty Service FREQUENCY CONVERSION SI 000 Dienount Regular RepairWfK1i F Moan Makes Models Cenveresd L&~ Tuning Done Spectrum Analyzer Also Service Forfl AE E/ IFIiiiii uad Only Full Time Servlcenter MIdwest 17 East Main St Northvil le Michin 48167 C Upper arrd Phone 1-313-348-0085 44 44 44 thats maximum capability charger moot charger output power about seven cells times 16 volts/cell charg ing times 45 amps about 50 watts Now lets add cell charge larger pack DC/DC Super Charger should clear power delivered battery greater seven-cell & mm mm — pack about 58 watts BUT Super Charger also has efficiency factor less 100% 50 requires input power delivering Taking effi ciency factor 80% example lower yet modified charger its input power must 58 watts output divided 080 80% effi ciency about 72 watts clear such input power demand ex ceeds output power capability pre viously calculated about 50 watts AC/DC charger used example Beyond consideration however fact AC/DC chargers have high line-ripple content outputs due lack filtering fol lowing transformer rectifier circuitry Super Charger designed operate pure DC input have tried theres Continued page 153 May 1988 49 4 4 4 4 4 4 4 4 4 4 4 4 H H H H george snapiick Ringoes NJ LeI sure Lanzo Bomber 1987 Electric Fly returned trip Greece Satur day could attend meet Sundayl Power system geared Cobalt 05 seven SOOmAh celia turning hand-carved 11 x 6 Radio mixes Futaba FM Cannon servos HY-70B$1495 An improved HY-71 Features reinforced prop shaft neoprene sleeve engage disengage Free-wheeling HY-7OBR$1795 Some HY-70B equipped Remote Flight Battery Holder er has 7 leads osick disconnects Slide battery FLIGHT BATTERI B-62 2x50 mAHr 9 gins Snap place motor No wiring renuired 852 2x80 mAHr .... Same 8-62 motor-run 1 minutes 8-63 3a50 mAHr 13 gins. 5 powerful f,fh htar wotnrrzn Du2 0 Carry Largest Only Stock Kraft Parts World.. Kraft alive working smiling fellow winner 1987 KRC Electric Fly Amptique raffle Complete plane less radio built KRC members Lots folks took lots chances win goody Lucky person Dr Joe Kraynak Norristown PA Power system stock geared Leisure 05 seven 800mAh ceils Plane flies superblyas Amptiques PlC Video Tape Vol 1 Basics 115 minuteS total running time .grcat educatLonal value recomniendd clubs hobbs shop owners. Model AviatIon Nov 1987 Only $1795 tax & shipping mci VISA M/C orders call 415 967-5134 Penn International Chemicals 943 Steirlin Rd iew CA 3 m n Road Kunners being successfully flown thin air Wyoming Colorado Eds latest de sign effort amongst nonscale Giants Wily Coyote low-winger 120 igni tion Ed says designed Road Runner eater Right now hes putting through its test paces hope well have photo next months column RC Electrics/Kopski Continued page 49 no point anyway suspect may react ad versely such unfiltered inputs natural follow-up operate-off-shehouse-line question concerns just what can used power large chargers home should clear such line-operated supply has BIG capability such may readily availableand case would quite expensive Just case some desire pursue idea further suggest look 12-volt DC supply capable supplying 20 amps continuously Personally dont know get thats economical Additional relevant discussion can found MA col umn June 87 wherein some thoughts given about bench-running motors January 1988 column featued coverage 1987 KRC Electric Fly have previous first-of-the-year issues covered preceding KRC meets However years coverage has proven different years has brought lots reader reaction questions about people planes pictured also about Electric Fly itselfsomething unusual just seems suddenly readers have become very interested meet response cross section latter questions KRC Electric Fly Keystone Radio Control Club Electric Fly KRC based Hatfield PAabout 35 miles north Philadel phia folks now view annual affair being perhaps largest club-sponsored annual Electric meet world Historically Electric Fly two-day meet having fun-fly format held third weekend September club field Hat field Ninth Annual KRC Electric Fly scheduled September 17-18 1988 proba bly will moved nearby much larger field since meet has outgrown historic site can get detailed information sending SASE CD Bruce Fenstermach er 636 Schoolhouse Rd Telford PA 18969 ElectriCub Great Planes brings its share reader mail months photos clude two examples model have seen both air planes look pretty ground have flown ElectriCub can pass along some input thoughts about As generalization feel kit design heavier need penalty ROG takeoffs attempted stock power system Typically stock power system marginal regardsome Cubs can just barely make off ground some cant option may help problem change six 1 2-Ah cells lighter 800-mAb packs Some modelers have suggested upping six cells seven have oppor tunity bench-run two ElectriCub Thrustmaster motors based data think changing seven 800-mAh cells staying kit-supplied 8 x 4 Tornado prop good idea reference seven cells prop should result average 10500 rpm input current about 19 amps total power input about 135 watts As see just about can expect Thrustmaster han dle still give reasonable motor life fact what would try myself Electri Cub Thrustmaster motor what really would Electri Cub would use 15-size Yuk hate kind size-designation motor speed con trol know Id have model significantly greater capability completely consistent Caliph experience documented heav ily recent columns Like Caliph ElectriCub what call three-pound plane mean almost no matter what because models size structure flying intent state Elec tric theyre gonna come Out weighing some between 2 31A lb Installing 15 sys tem will push upper limit weight range will result plane plenty groundhandling capability some aerobatic cap ability did figure out self have also reader input saying 15 way go Now surely cant wrong right Anyway some specifics Based referenced Caliph work recommend consider powering ElectriCub either ferrite cobalt 15 direct drive 10 12 cells use speed control recommend 8 x 6 nylon prop 10 cells 8 x 4 12 plane think best choice 800 mAh cells 900s second Finally based reader input SURE beef up wing center sec tionyou can loop Cub have build new Continued page 154 May1988 153 49Y&Z//V RADIO CONTROL SHORTKITS FOR 25 TO 45 ENGINES VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL QUALITY PRODUCTS SINCE 1964 THESE TWINS HAVE BEEN DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT AS WITH ALL OF OUR SHORT KITS THEY ARE BUILTAROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION THE SPECIALLY DESIGNED AIRFOILS AND GENEROUS TAIL AREAS GIVE THEM OUTSTANDING FLIGHTPERFORMANCE THROUGH OUT THE ENTIRE SPEED RANGE NEW P-38 LIGHTNING TWIN 706495 N A-26 INVADER TWIN 685495 SHORT 1113 IHCLLIDE WING CORES CANOPIES COWLS PUNS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SHORT HA RD WA RE PA CKA GEAND MATERIALS LIST FOR ADDITIONAL BALSA AND HARDWARE NEEDED OROERINGSENDCHECKORMONEYORDERFORREOUIREDAMOUNT PLUS 450 PER KIT CANADIANS ADD t6S0 TO WING MEG P0 BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESI DENTS ADD 6/% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 350 FOB PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM WING CORES ACCESSORIES KITS TOOLS AND MUCH MORE f/iVG MEG WORLD WAR II FIGHTER SERIES S AGM2 ZERO 54 SPAN 995 P-40 TOMA HA WK55 SPAN. 2995 P-39 AIRA COBRA 55 SPAN . 2995 P-51D MUSTANG 54 SPAN . 2995 C202 FOLGORE 56 SPAN 5 FOCKE WULF 190 54 SPAN. 2995 PHONE 815-459-0417 leads quite naturally continuation topic begun last monthnamely larger power systems using seven cells time indicated personal liking 15-size motors commented versa tility As illustration versatility slow start direction larger sys tems call attention months photos shows cobalt 15 installed believe notan Amptique WOW 15 Amptique must go like No doesnt 15 pictured powered seven 800-mAh cells swings 8 x 6 prop power level very close 05 geared systems popular Amptique plane flies indistinguishably except has lot prop ground clear ance Now would anyone put 15 such underutilization Well George Poos Fort Washington PA got tired bending break ing gear shafts plane also planning new hydro modeliS-sizedin future Knowing suggested get 15 sooner needed later project install temporarily Amptique Static motor data clearly showed motor 8 x 6 prop seven cells already plane should about same system indeed does What makes cobalt 15 practical Amptiquetemporarily notis 15 co balt relatively light small motor weighs about seven ounces physically smaller some 05 ferrites As can seen motor installs easily other 05 planes seven cells require economy charger effect what George now has sort loafing high-capability motor really great plane what also has fine motor reserve just waiting 12-cell pack some plane designed 15-size motor its stuff As noted above point illustrate what meant versatility 15 cobalt add example have personally flown 15s seven eight nine 10 12 cells have witnessed flight 14 cells thats have six motors have pow ered planes 38 oz about 56 oz have used both direct-drive gearedand just motor Now thats versatility know some readers agonize over power system selection starters Ive said times readers feel comfort able Electric actual prior Elec tric experience limited initial economy suggest carefully consider size motor first As described right first plane can delay purchase ad vanced charging system staying seven cells enjoy Electric knowing ye got motor has far capability youre ready use Now Ill betcha never thought approach Electric Elation Before leaving idea entirely must also clude fact used way 15 NOT substitute cobalt 05 ie both seven cells former loafing lat ter would typically maxed-out former running about 90-100 watts input static less half its full capability Beyond should clear same operating cur rent 12 cells 15 results 12/7 times power level 70% 05 cobalt add real zest comparison note 15 05 cobalts just about same size weight chance still some doubts should gone now 15 indeed VERY ver satile includes both cobalt super ferrite lSs latter being larger heav ier functionally same no 05 super ferrite larger power systems future Electric Model Fliers EMF Chicago all-Electric group membership 16 writing have anxiousness attract other modelers same persuasion club has nifty monthly newsletter Current Flow places fly club based Chicago metro area informal fun-fly-orien Continued page 160 Stand Off Scale Extra 230 Kits Now Available Three Sizes 30% Scale Kit ~ pIUB5l5BhIppIBg 113 Scale Kit 96 plus $15 shipping 114 Scale Kit ~ plus 510 shipping Cash VISA Certified Check R/C EXTRAS 712-943-4102 RR1 Box 28B Sergeant Bluff IA 51054 Pat gine NunbtDslanceSize Size 96355 31 9 95 0630019651395 65500553260 901495 0660565329512595 FF7507532 1595 633s130eOaorz FF850 0365 zln 2995 Ie Ii AMERICAN JR OM RIDGE CAMPBELL T RITE DUBRO EASY BUILT MODELS FLYLINE FOX BERG DUBOIS LOW K&B MICRO X OS MAX RA PECK-POLYMER ECT MODELS SEAGLEN STERLING IVAN SUPER TIGRE INDER FLITE LER WILLIAMSS PRODUCTS RS ESTES MODEL ROCKETS Send SI Caub Check Stamp 32 page tabloId duel DISCOUNT Catalog 900 illustrations oFo 700 Kits choose Iron MAILOROER PHONEORDER IN STORE PENN VALLEY HOllY CENTER 837 W Main St Lansiam1a 19446 154 Model Aviation AW7 NEW Scale RFBOO Dual Strut Nose Gear ho liszt hoFO ShiFfung OW ha FullS Tooling PO Box 95 Champaign IL 61820 180260 Octued RC Electrics/Kopski Continued page 154 ted organization members wish promote fact Electrics fly well help new comers Electric endeavor good info came editor Current Flow Steve Moskal Steve can reached 30 S Ken sington Ave LaGrange IL 60525 tele phone number 312 354-2803 Interested mod elers might try giving Steve shout tell im Bob sent yal Andmy own best wishes EMF Oh woe unbounded griefl Another column endingwith much left pass along next month Happy silent landings everyone RC Aerobatics/Van Putte Continued page 51 aileron side wheel want get aileron differential high-wing airplane both techniques must re versed ie bend aileron torque arms back attach pushrods aileron servo wheel side opposite ailerons Doubting Thomas letter writers mailed copy Figure 4 shows what hap pens have equal servo output same both directions low-wing airplane can clearly see Up Down use both techniques youll get differential really surprised number letters received about design tips Id included March 1988 column uniformly en thusiastic support of same kind design ideas So next month Ill include some ideas proper design vertical fin tales about tails RC Pylon Racing/Hager Continued page 52 very consistent work up slowly towards prop speed Take time work fuel system including shutoff until works flawlessly Airplane balance control Another com mon mistake opinion fact people set up airplanes too sensitive controls Concentrate flying smoothly like tame airplane down desensitizing Kits controls Use enough get airplane Item around course Too much throw can get Thunder trouble make erratic flying Use QIt full travel joystick order get maximum resolution feel setup critical surface elevator China Make sure CG comes Out exactly mdi- Clipper cated plans Start off recommend- T-railed ed throws listed plans Fly airplane set throw elevator full stick trav el obtain turns radius slightly smaller 100 ft enough al- Spickler lows start pylon 2-3 turn slowly using maybe half stick travel around No 2 end up Texas Out going around No 3 stick bottomed out law always pull full Up elevator No 1 except first lap Stay same altitude around Scat Cat course Try climb dive too much Next like set ailerons up slow airplane would just barely roll twice going down straights gave full aileron throw set up rudder get minimum travel possible smallest servo output wheel using farthest hole control horn throw ends up too much fore takeoff end up using about V Right rudder travel stick closing want stress again pure speed what wins race Being consistent flying smooth tight wins race Thanks Tom rest list people compa nies sell Racing products list began April 1988 column Quickie 500 Manufact urer Phone Address Pauls Fly 619 743ing Stuff 5458 Paul Steinberg Model Tech California Speed Products PO Box 121 Escondido CA 92025 Hobby Stores 714 661- 32221 Alipaz #15 7430 San Juan Capistrano CA 92675 Hobby Stores Spickler Models Ritchs 713 661Hobbies 5458 Dick Ritch Flue Line Models 4104 Lark Houston TX 77025 Hobby Stores Continued page 162 install hinges hate Try Easy Hinges See Difference single slol s few drops C/A glue ssd its dsne No geuging pinning sr hinge pins wsrrs absuf Iscredibly strssg Virtually indeslructible 24 hinges 295 e e4 oa Za en INE PO Box 1743 Marcos CA 92069 flUe W fl1SiX V1W CWit fl5 LW ISUhuhIt ccie Ia m5uled Hal & mnd Lanai Wzdsgl j um _ntomrss 4 Power Only certified checks money orders accepsed Minimum order S1OO0to three packases 4 Powerpoles 5315 per pasfsage siCto shipping Sendlinat CT rnsidenfs add 75% sales tao Prices sabiect c5angenithosf notion DEALER iNQUiRIES INVITED farther information deale prices send SASh Basiness Card SERMOS RIC SNAP CONNECTORS Cedas Canes S Box 16787 Slanted CT 069203322-6294 160 Model Aviation qowsagSnrx zun IW Cussomlzed nawest German engInes noefrom vault Muffiw Mount MountIng Bolts y Presmirs Tap Smoke Carburetor LInkage CDI IgnltlonfCl4 EleclronloaL 48 Volt IgnitIon Pack Safety a0 Sitdi SIx-Bolt Hub ResIstor Spark Plugs Veer Wanenty Faulty Paresand WakmuultIp TaG MFG 857 High Mountain Rd North Haledon TO Law 200ulyRowhi Glese body wheel pant. end cowl P ft N5flO 51011 Poem wing al bale Included Sach 31 wllh points Included avahleblel Mw2pI--mn-i EDO FLOATS /a SCALE 46 LONG SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST P0 Box 306 MA ~ PosI Falls ID 83854 yr 081 7739001
Edition: Model Aviation - 1988/05
Page Numbers: 48, 49, 153, 154, 160
these probably worth detailing Astrolows automatically AC/DC charger de DC/DC Super Charger frequently used tosigned lesser packs could supply charge larger cell counts can chargedpower input needed bigger charger 12-volt auto battery and/or pop-charge larger packs ______ular AC/DC six-to-seven-cell chargers operat- Heres example Lets say have rou ing AC Assuming normal charging currentstinely used some AC/DC charger charge cell counts ereater eight almost fol-seven-cell 12 Ah pack about 40-45 amps THE MODIFIED Astro DC/DC Super Charg erstill article modifying charger appeared September October 1987 issues continues bring reader response month theres common prob lem frequent question discuss Some readers have experienced peculiar form operation modified chargers wherein charger seems work OK HI/LO switch set HIbut wont work LO setting turns out folks got transistor circuit 180 wrong Admittedly lead arrangement some recom mended transistor options easy confuse some readers accidentally got collector emitter interchanged base connected correctly rotation just happens put transistor so-called inverted mode some transistors can actually functiona little explains almost right charger opera tion sounds like problem have let suggest take another look transis tor lead connections theres chance have incorrect strongly suggest buy new transistor just case correctly substitute wrongly installed charger should work just promised subject articles popular reader question about Astro 102 Super Charger modified whether can powered off house current AC/DC Charger such Astro 4005B shop use NO categoric negative actually does have very limited number possible exceptions Left Nick Spagnuolo Rochester NY 1987 KRC Electric Fly stock-kit ElectriCub Nick brought new model powered seven 800mAh cells Thrustmaster got Keith Shaw check out him has Jomar SC-S power control unit weighs 43 oz ready fly Later Nick installed Cobalt 15 motor tried both 10 12 cells reaction Wow really came alive Right Bruce Fernstermachers Great Planes ElectriCub configured Army 0-59 trainer stock J-3 used 1940-41 era Keystone RC Club member Bruce duplicated markings full-size Fort Rucker recently earned helicopter wings rotors spent extra effort cut down structural weight model Power system stock Thrustmaster six 12Ah cells 48 Model Aviation Radio Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 second series three photo clues mystery Electric introduced last month Hint should able go local hobby store readily get started just like Now can anyone guess what Final photo clue will appear next month An underutilized Cobalt 15 nested neatly Amptique nose earlier geared stallation resided Behind motor Jomar SC-5 on/off switch charge jack connectors Prop 8 x 6 Tornado Energy bank seven 800mAh cells info text -r_ MINI POWER AT ITS BEST t Weight l P-30 Size Models k Gear Ratio t ant Start Cost Battery Power ner PROPULSION SYSTEMS MOTORS vi-ius 95 Includes HY-70B Motor B-62 Battery 2 Props Charge Plug Connector Accessory Pkg screws spacers etc VI-ulOR 5 Same VL-l1lB HY-7OBR Motor Remote Flight Battery Holder KIEJFE MIDWEST WHAT FIX Warranty Service FREQUENCY CONVERSION SI 000 Dienount Regular RepairWfK1i F Moan Makes Models Cenveresd L&~ Tuning Done Spectrum Analyzer Also Service Forfl AE E/ IFIiiiii uad Only Full Time Servlcenter MIdwest 17 East Main St Northvil le Michin 48167 C Upper arrd Phone 1-313-348-0085 44 44 44 thats maximum capability charger moot charger output power about seven cells times 16 volts/cell charg ing times 45 amps about 50 watts Now lets add cell charge larger pack DC/DC Super Charger should clear power delivered battery greater seven-cell & mm mm — pack about 58 watts BUT Super Charger also has efficiency factor less 100% 50 requires input power delivering Taking effi ciency factor 80% example lower yet modified charger its input power must 58 watts output divided 080 80% effi ciency about 72 watts clear such input power demand ex ceeds output power capability pre viously calculated about 50 watts AC/DC charger used example Beyond consideration however fact AC/DC chargers have high line-ripple content outputs due lack filtering fol lowing transformer rectifier circuitry Super Charger designed operate pure DC input have tried theres Continued page 153 May 1988 49 4 4 4 4 4 4 4 4 4 4 4 4 H H H H george snapiick Ringoes NJ LeI sure Lanzo Bomber 1987 Electric Fly returned trip Greece Satur day could attend meet Sundayl Power system geared Cobalt 05 seven SOOmAh celia turning hand-carved 11 x 6 Radio mixes Futaba FM Cannon servos HY-70B$1495 An improved HY-71 Features reinforced prop shaft neoprene sleeve engage disengage Free-wheeling HY-7OBR$1795 Some HY-70B equipped Remote Flight Battery Holder er has 7 leads osick disconnects Slide battery FLIGHT BATTERI B-62 2x50 mAHr 9 gins Snap place motor No wiring renuired 852 2x80 mAHr .... Same 8-62 motor-run 1 minutes 8-63 3a50 mAHr 13 gins. 5 powerful f,fh htar wotnrrzn Du2 0 Carry Largest Only Stock Kraft Parts World.. Kraft alive working smiling fellow winner 1987 KRC Electric Fly Amptique raffle Complete plane less radio built KRC members Lots folks took lots chances win goody Lucky person Dr Joe Kraynak Norristown PA Power system stock geared Leisure 05 seven 800mAh ceils Plane flies superblyas Amptiques PlC Video Tape Vol 1 Basics 115 minuteS total running time .grcat educatLonal value recomniendd clubs hobbs shop owners. Model AviatIon Nov 1987 Only $1795 tax & shipping mci VISA M/C orders call 415 967-5134 Penn International Chemicals 943 Steirlin Rd iew CA 3 m n Road Kunners being successfully flown thin air Wyoming Colorado Eds latest de sign effort amongst nonscale Giants Wily Coyote low-winger 120 igni tion Ed says designed Road Runner eater Right now hes putting through its test paces hope well have photo next months column RC Electrics/Kopski Continued page 49 no point anyway suspect may react ad versely such unfiltered inputs natural follow-up operate-off-shehouse-line question concerns just what can used power large chargers home should clear such line-operated supply has BIG capability such may readily availableand case would quite expensive Just case some desire pursue idea further suggest look 12-volt DC supply capable supplying 20 amps continuously Personally dont know get thats economical Additional relevant discussion can found MA col umn June 87 wherein some thoughts given about bench-running motors January 1988 column featued coverage 1987 KRC Electric Fly have previous first-of-the-year issues covered preceding KRC meets However years coverage has proven different years has brought lots reader reaction questions about people planes pictured also about Electric Fly itselfsomething unusual just seems suddenly readers have become very interested meet response cross section latter questions KRC Electric Fly Keystone Radio Control Club Electric Fly KRC based Hatfield PAabout 35 miles north Philadel phia folks now view annual affair being perhaps largest club-sponsored annual Electric meet world Historically Electric Fly two-day meet having fun-fly format held third weekend September club field Hat field Ninth Annual KRC Electric Fly scheduled September 17-18 1988 proba bly will moved nearby much larger field since meet has outgrown historic site can get detailed information sending SASE CD Bruce Fenstermach er 636 Schoolhouse Rd Telford PA 18969 ElectriCub Great Planes brings its share reader mail months photos clude two examples model have seen both air planes look pretty ground have flown ElectriCub can pass along some input thoughts about As generalization feel kit design heavier need penalty ROG takeoffs attempted stock power system Typically stock power system marginal regardsome Cubs can just barely make off ground some cant option may help problem change six 1 2-Ah cells lighter 800-mAb packs Some modelers have suggested upping six cells seven have oppor tunity bench-run two ElectriCub Thrustmaster motors based data think changing seven 800-mAh cells staying kit-supplied 8 x 4 Tornado prop good idea reference seven cells prop should result average 10500 rpm input current about 19 amps total power input about 135 watts As see just about can expect Thrustmaster han dle still give reasonable motor life fact what would try myself Electri Cub Thrustmaster motor what really would Electri Cub would use 15-size Yuk hate kind size-designation motor speed con trol know Id have model significantly greater capability completely consistent Caliph experience documented heav ily recent columns Like Caliph ElectriCub what call three-pound plane mean almost no matter what because models size structure flying intent state Elec tric theyre gonna come Out weighing some between 2 31A lb Installing 15 sys tem will push upper limit weight range will result plane plenty groundhandling capability some aerobatic cap ability did figure out self have also reader input saying 15 way go Now surely cant wrong right Anyway some specifics Based referenced Caliph work recommend consider powering ElectriCub either ferrite cobalt 15 direct drive 10 12 cells use speed control recommend 8 x 6 nylon prop 10 cells 8 x 4 12 plane think best choice 800 mAh cells 900s second Finally based reader input SURE beef up wing center sec tionyou can loop Cub have build new Continued page 154 May1988 153 49Y&Z//V RADIO CONTROL SHORTKITS FOR 25 TO 45 ENGINES VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL QUALITY PRODUCTS SINCE 1964 THESE TWINS HAVE BEEN DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT AS WITH ALL OF OUR SHORT KITS THEY ARE BUILTAROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION THE SPECIALLY DESIGNED AIRFOILS AND GENEROUS TAIL AREAS GIVE THEM OUTSTANDING FLIGHTPERFORMANCE THROUGH OUT THE ENTIRE SPEED RANGE NEW P-38 LIGHTNING TWIN 706495 N A-26 INVADER TWIN 685495 SHORT 1113 IHCLLIDE WING CORES CANOPIES COWLS PUNS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SHORT HA RD WA RE PA CKA GEAND MATERIALS LIST FOR ADDITIONAL BALSA AND HARDWARE NEEDED OROERINGSENDCHECKORMONEYORDERFORREOUIREDAMOUNT PLUS 450 PER KIT CANADIANS ADD t6S0 TO WING MEG P0 BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESI DENTS ADD 6/% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 350 FOB PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM WING CORES ACCESSORIES KITS TOOLS AND MUCH MORE f/iVG MEG WORLD WAR II FIGHTER SERIES S AGM2 ZERO 54 SPAN 995 P-40 TOMA HA WK55 SPAN. 2995 P-39 AIRA COBRA 55 SPAN . 2995 P-51D MUSTANG 54 SPAN . 2995 C202 FOLGORE 56 SPAN 5 FOCKE WULF 190 54 SPAN. 2995 PHONE 815-459-0417 leads quite naturally continuation topic begun last monthnamely larger power systems using seven cells time indicated personal liking 15-size motors commented versa tility As illustration versatility slow start direction larger sys tems call attention months photos shows cobalt 15 installed believe notan Amptique WOW 15 Amptique must go like No doesnt 15 pictured powered seven 800-mAh cells swings 8 x 6 prop power level very close 05 geared systems popular Amptique plane flies indistinguishably except has lot prop ground clear ance Now would anyone put 15 such underutilization Well George Poos Fort Washington PA got tired bending break ing gear shafts plane also planning new hydro modeliS-sizedin future Knowing suggested get 15 sooner needed later project install temporarily Amptique Static motor data clearly showed motor 8 x 6 prop seven cells already plane should about same system indeed does What makes cobalt 15 practical Amptiquetemporarily notis 15 co balt relatively light small motor weighs about seven ounces physically smaller some 05 ferrites As can seen motor installs easily other 05 planes seven cells require economy charger effect what George now has sort loafing high-capability motor really great plane what also has fine motor reserve just waiting 12-cell pack some plane designed 15-size motor its stuff As noted above point illustrate what meant versatility 15 cobalt add example have personally flown 15s seven eight nine 10 12 cells have witnessed flight 14 cells thats have six motors have pow ered planes 38 oz about 56 oz have used both direct-drive gearedand just motor Now thats versatility know some readers agonize over power system selection starters Ive said times readers feel comfort able Electric actual prior Elec tric experience limited initial economy suggest carefully consider size motor first As described right first plane can delay purchase ad vanced charging system staying seven cells enjoy Electric knowing ye got motor has far capability youre ready use Now Ill betcha never thought approach Electric Elation Before leaving idea entirely must also clude fact used way 15 NOT substitute cobalt 05 ie both seven cells former loafing lat ter would typically maxed-out former running about 90-100 watts input static less half its full capability Beyond should clear same operating cur rent 12 cells 15 results 12/7 times power level 70% 05 cobalt add real zest comparison note 15 05 cobalts just about same size weight chance still some doubts should gone now 15 indeed VERY ver satile includes both cobalt super ferrite lSs latter being larger heav ier functionally same no 05 super ferrite larger power systems future Electric Model Fliers EMF Chicago all-Electric group membership 16 writing have anxiousness attract other modelers same persuasion club has nifty monthly newsletter Current Flow places fly club based Chicago metro area informal fun-fly-orien Continued page 160 Stand Off Scale Extra 230 Kits Now Available Three Sizes 30% Scale Kit ~ pIUB5l5BhIppIBg 113 Scale Kit 96 plus $15 shipping 114 Scale Kit ~ plus 510 shipping Cash VISA Certified Check R/C EXTRAS 712-943-4102 RR1 Box 28B Sergeant Bluff IA 51054 Pat gine NunbtDslanceSize Size 96355 31 9 95 0630019651395 65500553260 901495 0660565329512595 FF7507532 1595 633s130eOaorz FF850 0365 zln 2995 Ie Ii AMERICAN JR OM RIDGE CAMPBELL T RITE DUBRO EASY BUILT MODELS FLYLINE FOX BERG DUBOIS LOW K&B MICRO X OS MAX RA PECK-POLYMER ECT MODELS SEAGLEN STERLING IVAN SUPER TIGRE INDER FLITE LER WILLIAMSS PRODUCTS RS ESTES MODEL ROCKETS Send SI Caub Check Stamp 32 page tabloId duel DISCOUNT Catalog 900 illustrations oFo 700 Kits choose Iron MAILOROER PHONEORDER IN STORE PENN VALLEY HOllY CENTER 837 W Main St Lansiam1a 19446 154 Model Aviation AW7 NEW Scale RFBOO Dual Strut Nose Gear ho liszt hoFO ShiFfung OW ha FullS Tooling PO Box 95 Champaign IL 61820 180260 Octued RC Electrics/Kopski Continued page 154 ted organization members wish promote fact Electrics fly well help new comers Electric endeavor good info came editor Current Flow Steve Moskal Steve can reached 30 S Ken sington Ave LaGrange IL 60525 tele phone number 312 354-2803 Interested mod elers might try giving Steve shout tell im Bob sent yal Andmy own best wishes EMF Oh woe unbounded griefl Another column endingwith much left pass along next month Happy silent landings everyone RC Aerobatics/Van Putte Continued page 51 aileron side wheel want get aileron differential high-wing airplane both techniques must re versed ie bend aileron torque arms back attach pushrods aileron servo wheel side opposite ailerons Doubting Thomas letter writers mailed copy Figure 4 shows what hap pens have equal servo output same both directions low-wing airplane can clearly see Up Down use both techniques youll get differential really surprised number letters received about design tips Id included March 1988 column uniformly en thusiastic support of same kind design ideas So next month Ill include some ideas proper design vertical fin tales about tails RC Pylon Racing/Hager Continued page 52 very consistent work up slowly towards prop speed Take time work fuel system including shutoff until works flawlessly Airplane balance control Another com mon mistake opinion fact people set up airplanes too sensitive controls Concentrate flying smoothly like tame airplane down desensitizing Kits controls Use enough get airplane Item around course Too much throw can get Thunder trouble make erratic flying Use QIt full travel joystick order get maximum resolution feel setup critical surface elevator China Make sure CG comes Out exactly mdi- Clipper cated plans Start off recommend- T-railed ed throws listed plans Fly airplane set throw elevator full stick trav el obtain turns radius slightly smaller 100 ft enough al- Spickler lows start pylon 2-3 turn slowly using maybe half stick travel around No 2 end up Texas Out going around No 3 stick bottomed out law always pull full Up elevator No 1 except first lap Stay same altitude around Scat Cat course Try climb dive too much Next like set ailerons up slow airplane would just barely roll twice going down straights gave full aileron throw set up rudder get minimum travel possible smallest servo output wheel using farthest hole control horn throw ends up too much fore takeoff end up using about V Right rudder travel stick closing want stress again pure speed what wins race Being consistent flying smooth tight wins race Thanks Tom rest list people compa nies sell Racing products list began April 1988 column Quickie 500 Manufact urer Phone Address Pauls Fly 619 743ing Stuff 5458 Paul Steinberg Model Tech California Speed Products PO Box 121 Escondido CA 92025 Hobby Stores 714 661- 32221 Alipaz #15 7430 San Juan Capistrano CA 92675 Hobby Stores Spickler Models Ritchs 713 661Hobbies 5458 Dick Ritch Flue Line Models 4104 Lark Houston TX 77025 Hobby Stores Continued page 162 install hinges hate Try Easy Hinges See Difference single slol s few drops C/A glue ssd its dsne No geuging pinning sr hinge pins wsrrs absuf Iscredibly strssg Virtually indeslructible 24 hinges 295 e e4 oa Za en INE PO Box 1743 Marcos CA 92069 flUe W fl1SiX V1W CWit fl5 LW ISUhuhIt ccie Ia m5uled Hal & mnd Lanai Wzdsgl j um _ntomrss 4 Power Only certified checks money orders accepsed Minimum order S1OO0to three packases 4 Powerpoles 5315 per pasfsage siCto shipping Sendlinat CT rnsidenfs add 75% sales tao Prices sabiect c5angenithosf notion DEALER iNQUiRIES INVITED farther information deale prices send SASh Basiness Card SERMOS RIC SNAP CONNECTORS Cedas Canes S Box 16787 Slanted CT 069203322-6294 160 Model Aviation qowsagSnrx zun IW Cussomlzed nawest German engInes noefrom vault Muffiw Mount MountIng Bolts y Presmirs Tap Smoke Carburetor LInkage CDI IgnltlonfCl4 EleclronloaL 48 Volt IgnitIon Pack Safety a0 Sitdi SIx-Bolt Hub ResIstor Spark Plugs Veer Wanenty Faulty Paresand WakmuultIp TaG MFG 857 High Mountain Rd North Haledon TO Law 200ulyRowhi Glese body wheel pant. end cowl P ft N5flO 51011 Poem wing al bale Included Sach 31 wllh points Included avahleblel Mw2pI--mn-i EDO FLOATS /a SCALE 46 LONG SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST P0 Box 306 MA ~ PosI Falls ID 83854 yr 081 7739001
Edition: Model Aviation - 1988/05
Page Numbers: 48, 49, 153, 154, 160
these probably worth detailing Astrolows automatically AC/DC charger de DC/DC Super Charger frequently used tosigned lesser packs could supply charge larger cell counts can chargedpower input needed bigger charger 12-volt auto battery and/or pop-charge larger packs ______ular AC/DC six-to-seven-cell chargers operat- Heres example Lets say have rou ing AC Assuming normal charging currentstinely used some AC/DC charger charge cell counts ereater eight almost fol-seven-cell 12 Ah pack about 40-45 amps THE MODIFIED Astro DC/DC Super Charg erstill article modifying charger appeared September October 1987 issues continues bring reader response month theres common prob lem frequent question discuss Some readers have experienced peculiar form operation modified chargers wherein charger seems work OK HI/LO switch set HIbut wont work LO setting turns out folks got transistor circuit 180 wrong Admittedly lead arrangement some recom mended transistor options easy confuse some readers accidentally got collector emitter interchanged base connected correctly rotation just happens put transistor so-called inverted mode some transistors can actually functiona little explains almost right charger opera tion sounds like problem have let suggest take another look transis tor lead connections theres chance have incorrect strongly suggest buy new transistor just case correctly substitute wrongly installed charger should work just promised subject articles popular reader question about Astro 102 Super Charger modified whether can powered off house current AC/DC Charger such Astro 4005B shop use NO categoric negative actually does have very limited number possible exceptions Left Nick Spagnuolo Rochester NY 1987 KRC Electric Fly stock-kit ElectriCub Nick brought new model powered seven 800mAh cells Thrustmaster got Keith Shaw check out him has Jomar SC-S power control unit weighs 43 oz ready fly Later Nick installed Cobalt 15 motor tried both 10 12 cells reaction Wow really came alive Right Bruce Fernstermachers Great Planes ElectriCub configured Army 0-59 trainer stock J-3 used 1940-41 era Keystone RC Club member Bruce duplicated markings full-size Fort Rucker recently earned helicopter wings rotors spent extra effort cut down structural weight model Power system stock Thrustmaster six 12Ah cells 48 Model Aviation Radio Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 second series three photo clues mystery Electric introduced last month Hint should able go local hobby store readily get started just like Now can anyone guess what Final photo clue will appear next month An underutilized Cobalt 15 nested neatly Amptique nose earlier geared stallation resided Behind motor Jomar SC-5 on/off switch charge jack connectors Prop 8 x 6 Tornado Energy bank seven 800mAh cells info text -r_ MINI POWER AT ITS BEST t Weight l P-30 Size Models k Gear Ratio t ant Start Cost Battery Power ner PROPULSION SYSTEMS MOTORS vi-ius 95 Includes HY-70B Motor B-62 Battery 2 Props Charge Plug Connector Accessory Pkg screws spacers etc VI-ulOR 5 Same VL-l1lB HY-7OBR Motor Remote Flight Battery Holder KIEJFE MIDWEST WHAT FIX Warranty Service FREQUENCY CONVERSION SI 000 Dienount Regular RepairWfK1i F Moan Makes Models Cenveresd L&~ Tuning Done Spectrum Analyzer Also Service Forfl AE E/ IFIiiiii uad Only Full Time Servlcenter MIdwest 17 East Main St Northvil le Michin 48167 C Upper arrd Phone 1-313-348-0085 44 44 44 thats maximum capability charger moot charger output power about seven cells times 16 volts/cell charg ing times 45 amps about 50 watts Now lets add cell charge larger pack DC/DC Super Charger should clear power delivered battery greater seven-cell & mm mm — pack about 58 watts BUT Super Charger also has efficiency factor less 100% 50 requires input power delivering Taking effi ciency factor 80% example lower yet modified charger its input power must 58 watts output divided 080 80% effi ciency about 72 watts clear such input power demand ex ceeds output power capability pre viously calculated about 50 watts AC/DC charger used example Beyond consideration however fact AC/DC chargers have high line-ripple content outputs due lack filtering fol lowing transformer rectifier circuitry Super Charger designed operate pure DC input have tried theres Continued page 153 May 1988 49 4 4 4 4 4 4 4 4 4 4 4 4 H H H H george snapiick Ringoes NJ LeI sure Lanzo Bomber 1987 Electric Fly returned trip Greece Satur day could attend meet Sundayl Power system geared Cobalt 05 seven SOOmAh celia turning hand-carved 11 x 6 Radio mixes Futaba FM Cannon servos HY-70B$1495 An improved HY-71 Features reinforced prop shaft neoprene sleeve engage disengage Free-wheeling HY-7OBR$1795 Some HY-70B equipped Remote Flight Battery Holder er has 7 leads osick disconnects Slide battery FLIGHT BATTERI B-62 2x50 mAHr 9 gins Snap place motor No wiring renuired 852 2x80 mAHr .... Same 8-62 motor-run 1 minutes 8-63 3a50 mAHr 13 gins. 5 powerful f,fh htar wotnrrzn Du2 0 Carry Largest Only Stock Kraft Parts World.. Kraft alive working smiling fellow winner 1987 KRC Electric Fly Amptique raffle Complete plane less radio built KRC members Lots folks took lots chances win goody Lucky person Dr Joe Kraynak Norristown PA Power system stock geared Leisure 05 seven 800mAh ceils Plane flies superblyas Amptiques PlC Video Tape Vol 1 Basics 115 minuteS total running time .grcat educatLonal value recomniendd clubs hobbs shop owners. Model AviatIon Nov 1987 Only $1795 tax & shipping mci VISA M/C orders call 415 967-5134 Penn International Chemicals 943 Steirlin Rd iew CA 3 m n Road Kunners being successfully flown thin air Wyoming Colorado Eds latest de sign effort amongst nonscale Giants Wily Coyote low-winger 120 igni tion Ed says designed Road Runner eater Right now hes putting through its test paces hope well have photo next months column RC Electrics/Kopski Continued page 49 no point anyway suspect may react ad versely such unfiltered inputs natural follow-up operate-off-shehouse-line question concerns just what can used power large chargers home should clear such line-operated supply has BIG capability such may readily availableand case would quite expensive Just case some desire pursue idea further suggest look 12-volt DC supply capable supplying 20 amps continuously Personally dont know get thats economical Additional relevant discussion can found MA col umn June 87 wherein some thoughts given about bench-running motors January 1988 column featued coverage 1987 KRC Electric Fly have previous first-of-the-year issues covered preceding KRC meets However years coverage has proven different years has brought lots reader reaction questions about people planes pictured also about Electric Fly itselfsomething unusual just seems suddenly readers have become very interested meet response cross section latter questions KRC Electric Fly Keystone Radio Control Club Electric Fly KRC based Hatfield PAabout 35 miles north Philadel phia folks now view annual affair being perhaps largest club-sponsored annual Electric meet world Historically Electric Fly two-day meet having fun-fly format held third weekend September club field Hat field Ninth Annual KRC Electric Fly scheduled September 17-18 1988 proba bly will moved nearby much larger field since meet has outgrown historic site can get detailed information sending SASE CD Bruce Fenstermach er 636 Schoolhouse Rd Telford PA 18969 ElectriCub Great Planes brings its share reader mail months photos clude two examples model have seen both air planes look pretty ground have flown ElectriCub can pass along some input thoughts about As generalization feel kit design heavier need penalty ROG takeoffs attempted stock power system Typically stock power system marginal regardsome Cubs can just barely make off ground some cant option may help problem change six 1 2-Ah cells lighter 800-mAb packs Some modelers have suggested upping six cells seven have oppor tunity bench-run two ElectriCub Thrustmaster motors based data think changing seven 800-mAh cells staying kit-supplied 8 x 4 Tornado prop good idea reference seven cells prop should result average 10500 rpm input current about 19 amps total power input about 135 watts As see just about can expect Thrustmaster han dle still give reasonable motor life fact what would try myself Electri Cub Thrustmaster motor what really would Electri Cub would use 15-size Yuk hate kind size-designation motor speed con trol know Id have model significantly greater capability completely consistent Caliph experience documented heav ily recent columns Like Caliph ElectriCub what call three-pound plane mean almost no matter what because models size structure flying intent state Elec tric theyre gonna come Out weighing some between 2 31A lb Installing 15 sys tem will push upper limit weight range will result plane plenty groundhandling capability some aerobatic cap ability did figure out self have also reader input saying 15 way go Now surely cant wrong right Anyway some specifics Based referenced Caliph work recommend consider powering ElectriCub either ferrite cobalt 15 direct drive 10 12 cells use speed control recommend 8 x 6 nylon prop 10 cells 8 x 4 12 plane think best choice 800 mAh cells 900s second Finally based reader input SURE beef up wing center sec tionyou can loop Cub have build new Continued page 154 May1988 153 49Y&Z//V RADIO CONTROL SHORTKITS FOR 25 TO 45 ENGINES VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL QUALITY PRODUCTS SINCE 1964 THESE TWINS HAVE BEEN DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT AS WITH ALL OF OUR SHORT KITS THEY ARE BUILTAROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION THE SPECIALLY DESIGNED AIRFOILS AND GENEROUS TAIL AREAS GIVE THEM OUTSTANDING FLIGHTPERFORMANCE THROUGH OUT THE ENTIRE SPEED RANGE NEW P-38 LIGHTNING TWIN 706495 N A-26 INVADER TWIN 685495 SHORT 1113 IHCLLIDE WING CORES CANOPIES COWLS PUNS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SHORT HA RD WA RE PA CKA GEAND MATERIALS LIST FOR ADDITIONAL BALSA AND HARDWARE NEEDED OROERINGSENDCHECKORMONEYORDERFORREOUIREDAMOUNT PLUS 450 PER KIT CANADIANS ADD t6S0 TO WING MEG P0 BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESI DENTS ADD 6/% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 350 FOB PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM WING CORES ACCESSORIES KITS TOOLS AND MUCH MORE f/iVG MEG WORLD WAR II FIGHTER SERIES S AGM2 ZERO 54 SPAN 995 P-40 TOMA HA WK55 SPAN. 2995 P-39 AIRA COBRA 55 SPAN . 2995 P-51D MUSTANG 54 SPAN . 2995 C202 FOLGORE 56 SPAN 5 FOCKE WULF 190 54 SPAN. 2995 PHONE 815-459-0417 leads quite naturally continuation topic begun last monthnamely larger power systems using seven cells time indicated personal liking 15-size motors commented versa tility As illustration versatility slow start direction larger sys tems call attention months photos shows cobalt 15 installed believe notan Amptique WOW 15 Amptique must go like No doesnt 15 pictured powered seven 800-mAh cells swings 8 x 6 prop power level very close 05 geared systems popular Amptique plane flies indistinguishably except has lot prop ground clear ance Now would anyone put 15 such underutilization Well George Poos Fort Washington PA got tired bending break ing gear shafts plane also planning new hydro modeliS-sizedin future Knowing suggested get 15 sooner needed later project install temporarily Amptique Static motor data clearly showed motor 8 x 6 prop seven cells already plane should about same system indeed does What makes cobalt 15 practical Amptiquetemporarily notis 15 co balt relatively light small motor weighs about seven ounces physically smaller some 05 ferrites As can seen motor installs easily other 05 planes seven cells require economy charger effect what George now has sort loafing high-capability motor really great plane what also has fine motor reserve just waiting 12-cell pack some plane designed 15-size motor its stuff As noted above point illustrate what meant versatility 15 cobalt add example have personally flown 15s seven eight nine 10 12 cells have witnessed flight 14 cells thats have six motors have pow ered planes 38 oz about 56 oz have used both direct-drive gearedand just motor Now thats versatility know some readers agonize over power system selection starters Ive said times readers feel comfort able Electric actual prior Elec tric experience limited initial economy suggest carefully consider size motor first As described right first plane can delay purchase ad vanced charging system staying seven cells enjoy Electric knowing ye got motor has far capability youre ready use Now Ill betcha never thought approach Electric Elation Before leaving idea entirely must also clude fact used way 15 NOT substitute cobalt 05 ie both seven cells former loafing lat ter would typically maxed-out former running about 90-100 watts input static less half its full capability Beyond should clear same operating cur rent 12 cells 15 results 12/7 times power level 70% 05 cobalt add real zest comparison note 15 05 cobalts just about same size weight chance still some doubts should gone now 15 indeed VERY ver satile includes both cobalt super ferrite lSs latter being larger heav ier functionally same no 05 super ferrite larger power systems future Electric Model Fliers EMF Chicago all-Electric group membership 16 writing have anxiousness attract other modelers same persuasion club has nifty monthly newsletter Current Flow places fly club based Chicago metro area informal fun-fly-orien Continued page 160 Stand Off Scale Extra 230 Kits Now Available Three Sizes 30% Scale Kit ~ pIUB5l5BhIppIBg 113 Scale Kit 96 plus $15 shipping 114 Scale Kit ~ plus 510 shipping Cash VISA Certified Check R/C EXTRAS 712-943-4102 RR1 Box 28B Sergeant Bluff IA 51054 Pat gine NunbtDslanceSize Size 96355 31 9 95 0630019651395 65500553260 901495 0660565329512595 FF7507532 1595 633s130eOaorz FF850 0365 zln 2995 Ie Ii AMERICAN JR OM RIDGE CAMPBELL T RITE DUBRO EASY BUILT MODELS FLYLINE FOX BERG DUBOIS LOW K&B MICRO X OS MAX RA PECK-POLYMER ECT MODELS SEAGLEN STERLING IVAN SUPER TIGRE INDER FLITE LER WILLIAMSS PRODUCTS RS ESTES MODEL ROCKETS Send SI Caub Check Stamp 32 page tabloId duel DISCOUNT Catalog 900 illustrations oFo 700 Kits choose Iron MAILOROER PHONEORDER IN STORE PENN VALLEY HOllY CENTER 837 W Main St Lansiam1a 19446 154 Model Aviation AW7 NEW Scale RFBOO Dual Strut Nose Gear ho liszt hoFO ShiFfung OW ha FullS Tooling PO Box 95 Champaign IL 61820 180260 Octued RC Electrics/Kopski Continued page 154 ted organization members wish promote fact Electrics fly well help new comers Electric endeavor good info came editor Current Flow Steve Moskal Steve can reached 30 S Ken sington Ave LaGrange IL 60525 tele phone number 312 354-2803 Interested mod elers might try giving Steve shout tell im Bob sent yal Andmy own best wishes EMF Oh woe unbounded griefl Another column endingwith much left pass along next month Happy silent landings everyone RC Aerobatics/Van Putte Continued page 51 aileron side wheel want get aileron differential high-wing airplane both techniques must re versed ie bend aileron torque arms back attach pushrods aileron servo wheel side opposite ailerons Doubting Thomas letter writers mailed copy Figure 4 shows what hap pens have equal servo output same both directions low-wing airplane can clearly see Up Down use both techniques youll get differential really surprised number letters received about design tips Id included March 1988 column uniformly en thusiastic support of same kind design ideas So next month Ill include some ideas proper design vertical fin tales about tails RC Pylon Racing/Hager Continued page 52 very consistent work up slowly towards prop speed Take time work fuel system including shutoff until works flawlessly Airplane balance control Another com mon mistake opinion fact people set up airplanes too sensitive controls Concentrate flying smoothly like tame airplane down desensitizing Kits controls Use enough get airplane Item around course Too much throw can get Thunder trouble make erratic flying Use QIt full travel joystick order get maximum resolution feel setup critical surface elevator China Make sure CG comes Out exactly mdi- Clipper cated plans Start off recommend- T-railed ed throws listed plans Fly airplane set throw elevator full stick trav el obtain turns radius slightly smaller 100 ft enough al- Spickler lows start pylon 2-3 turn slowly using maybe half stick travel around No 2 end up Texas Out going around No 3 stick bottomed out law always pull full Up elevator No 1 except first lap Stay same altitude around Scat Cat course Try climb dive too much Next like set ailerons up slow airplane would just barely roll twice going down straights gave full aileron throw set up rudder get minimum travel possible smallest servo output wheel using farthest hole control horn throw ends up too much fore takeoff end up using about V Right rudder travel stick closing want stress again pure speed what wins race Being consistent flying smooth tight wins race Thanks Tom rest list people compa nies sell Racing products list began April 1988 column Quickie 500 Manufact urer Phone Address Pauls Fly 619 743ing Stuff 5458 Paul Steinberg Model Tech California Speed Products PO Box 121 Escondido CA 92025 Hobby Stores 714 661- 32221 Alipaz #15 7430 San Juan Capistrano CA 92675 Hobby Stores Spickler Models Ritchs 713 661Hobbies 5458 Dick Ritch Flue Line Models 4104 Lark Houston TX 77025 Hobby Stores Continued page 162 install hinges hate Try Easy Hinges See Difference single slol s few drops C/A glue ssd its dsne No geuging pinning sr hinge pins wsrrs absuf Iscredibly strssg Virtually indeslructible 24 hinges 295 e e4 oa Za en INE PO Box 1743 Marcos CA 92069 flUe W fl1SiX V1W CWit fl5 LW ISUhuhIt ccie Ia m5uled Hal & mnd Lanai Wzdsgl j um _ntomrss 4 Power Only certified checks money orders accepsed Minimum order S1OO0to three packases 4 Powerpoles 5315 per pasfsage siCto shipping Sendlinat CT rnsidenfs add 75% sales tao Prices sabiect c5angenithosf notion DEALER iNQUiRIES INVITED farther information deale prices send SASh Basiness Card SERMOS RIC SNAP CONNECTORS Cedas Canes S Box 16787 Slanted CT 069203322-6294 160 Model Aviation qowsagSnrx zun IW Cussomlzed nawest German engInes noefrom vault Muffiw Mount MountIng Bolts y Presmirs Tap Smoke Carburetor LInkage CDI IgnltlonfCl4 EleclronloaL 48 Volt IgnitIon Pack Safety a0 Sitdi SIx-Bolt Hub ResIstor Spark Plugs Veer Wanenty Faulty Paresand WakmuultIp TaG MFG 857 High Mountain Rd North Haledon TO Law 200ulyRowhi Glese body wheel pant. end cowl P ft N5flO 51011 Poem wing al bale Included Sach 31 wllh points Included avahleblel Mw2pI--mn-i EDO FLOATS /a SCALE 46 LONG SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST P0 Box 306 MA ~ PosI Falls ID 83854 yr 081 7739001
Edition: Model Aviation - 1988/05
Page Numbers: 48, 49, 153, 154, 160
these probably worth detailing Astrolows automatically AC/DC charger de DC/DC Super Charger frequently used tosigned lesser packs could supply charge larger cell counts can chargedpower input needed bigger charger 12-volt auto battery and/or pop-charge larger packs ______ular AC/DC six-to-seven-cell chargers operat- Heres example Lets say have rou ing AC Assuming normal charging currentstinely used some AC/DC charger charge cell counts ereater eight almost fol-seven-cell 12 Ah pack about 40-45 amps THE MODIFIED Astro DC/DC Super Charg erstill article modifying charger appeared September October 1987 issues continues bring reader response month theres common prob lem frequent question discuss Some readers have experienced peculiar form operation modified chargers wherein charger seems work OK HI/LO switch set HIbut wont work LO setting turns out folks got transistor circuit 180 wrong Admittedly lead arrangement some recom mended transistor options easy confuse some readers accidentally got collector emitter interchanged base connected correctly rotation just happens put transistor so-called inverted mode some transistors can actually functiona little explains almost right charger opera tion sounds like problem have let suggest take another look transis tor lead connections theres chance have incorrect strongly suggest buy new transistor just case correctly substitute wrongly installed charger should work just promised subject articles popular reader question about Astro 102 Super Charger modified whether can powered off house current AC/DC Charger such Astro 4005B shop use NO categoric negative actually does have very limited number possible exceptions Left Nick Spagnuolo Rochester NY 1987 KRC Electric Fly stock-kit ElectriCub Nick brought new model powered seven 800mAh cells Thrustmaster got Keith Shaw check out him has Jomar SC-S power control unit weighs 43 oz ready fly Later Nick installed Cobalt 15 motor tried both 10 12 cells reaction Wow really came alive Right Bruce Fernstermachers Great Planes ElectriCub configured Army 0-59 trainer stock J-3 used 1940-41 era Keystone RC Club member Bruce duplicated markings full-size Fort Rucker recently earned helicopter wings rotors spent extra effort cut down structural weight model Power system stock Thrustmaster six 12Ah cells 48 Model Aviation Radio Control Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 second series three photo clues mystery Electric introduced last month Hint should able go local hobby store readily get started just like Now can anyone guess what Final photo clue will appear next month An underutilized Cobalt 15 nested neatly Amptique nose earlier geared stallation resided Behind motor Jomar SC-5 on/off switch charge jack connectors Prop 8 x 6 Tornado Energy bank seven 800mAh cells info text -r_ MINI POWER AT ITS BEST t Weight l P-30 Size Models k Gear Ratio t ant Start Cost Battery Power ner PROPULSION SYSTEMS MOTORS vi-ius 95 Includes HY-70B Motor B-62 Battery 2 Props Charge Plug Connector Accessory Pkg screws spacers etc VI-ulOR 5 Same VL-l1lB HY-7OBR Motor Remote Flight Battery Holder KIEJFE MIDWEST WHAT FIX Warranty Service FREQUENCY CONVERSION SI 000 Dienount Regular RepairWfK1i F Moan Makes Models Cenveresd L&~ Tuning Done Spectrum Analyzer Also Service Forfl AE E/ IFIiiiii uad Only Full Time Servlcenter MIdwest 17 East Main St Northvil le Michin 48167 C Upper arrd Phone 1-313-348-0085 44 44 44 thats maximum capability charger moot charger output power about seven cells times 16 volts/cell charg ing times 45 amps about 50 watts Now lets add cell charge larger pack DC/DC Super Charger should clear power delivered battery greater seven-cell & mm mm — pack about 58 watts BUT Super Charger also has efficiency factor less 100% 50 requires input power delivering Taking effi ciency factor 80% example lower yet modified charger its input power must 58 watts output divided 080 80% effi ciency about 72 watts clear such input power demand ex ceeds output power capability pre viously calculated about 50 watts AC/DC charger used example Beyond consideration however fact AC/DC chargers have high line-ripple content outputs due lack filtering fol lowing transformer rectifier circuitry Super Charger designed operate pure DC input have tried theres Continued page 153 May 1988 49 4 4 4 4 4 4 4 4 4 4 4 4 H H H H george snapiick Ringoes NJ LeI sure Lanzo Bomber 1987 Electric Fly returned trip Greece Satur day could attend meet Sundayl Power system geared Cobalt 05 seven SOOmAh celia turning hand-carved 11 x 6 Radio mixes Futaba FM Cannon servos HY-70B$1495 An improved HY-71 Features reinforced prop shaft neoprene sleeve engage disengage Free-wheeling HY-7OBR$1795 Some HY-70B equipped Remote Flight Battery Holder er has 7 leads osick disconnects Slide battery FLIGHT BATTERI B-62 2x50 mAHr 9 gins Snap place motor No wiring renuired 852 2x80 mAHr .... Same 8-62 motor-run 1 minutes 8-63 3a50 mAHr 13 gins. 5 powerful f,fh htar wotnrrzn Du2 0 Carry Largest Only Stock Kraft Parts World.. Kraft alive working smiling fellow winner 1987 KRC Electric Fly Amptique raffle Complete plane less radio built KRC members Lots folks took lots chances win goody Lucky person Dr Joe Kraynak Norristown PA Power system stock geared Leisure 05 seven 800mAh ceils Plane flies superblyas Amptiques PlC Video Tape Vol 1 Basics 115 minuteS total running time .grcat educatLonal value recomniendd clubs hobbs shop owners. Model AviatIon Nov 1987 Only $1795 tax & shipping mci VISA M/C orders call 415 967-5134 Penn International Chemicals 943 Steirlin Rd iew CA 3 m n Road Kunners being successfully flown thin air Wyoming Colorado Eds latest de sign effort amongst nonscale Giants Wily Coyote low-winger 120 igni tion Ed says designed Road Runner eater Right now hes putting through its test paces hope well have photo next months column RC Electrics/Kopski Continued page 49 no point anyway suspect may react ad versely such unfiltered inputs natural follow-up operate-off-shehouse-line question concerns just what can used power large chargers home should clear such line-operated supply has BIG capability such may readily availableand case would quite expensive Just case some desire pursue idea further suggest look 12-volt DC supply capable supplying 20 amps continuously Personally dont know get thats economical Additional relevant discussion can found MA col umn June 87 wherein some thoughts given about bench-running motors January 1988 column featued coverage 1987 KRC Electric Fly have previous first-of-the-year issues covered preceding KRC meets However years coverage has proven different years has brought lots reader reaction questions about people planes pictured also about Electric Fly itselfsomething unusual just seems suddenly readers have become very interested meet response cross section latter questions KRC Electric Fly Keystone Radio Control Club Electric Fly KRC based Hatfield PAabout 35 miles north Philadel phia folks now view annual affair being perhaps largest club-sponsored annual Electric meet world Historically Electric Fly two-day meet having fun-fly format held third weekend September club field Hat field Ninth Annual KRC Electric Fly scheduled September 17-18 1988 proba bly will moved nearby much larger field since meet has outgrown historic site can get detailed information sending SASE CD Bruce Fenstermach er 636 Schoolhouse Rd Telford PA 18969 ElectriCub Great Planes brings its share reader mail months photos clude two examples model have seen both air planes look pretty ground have flown ElectriCub can pass along some input thoughts about As generalization feel kit design heavier need penalty ROG takeoffs attempted stock power system Typically stock power system marginal regardsome Cubs can just barely make off ground some cant option may help problem change six 1 2-Ah cells lighter 800-mAb packs Some modelers have suggested upping six cells seven have oppor tunity bench-run two ElectriCub Thrustmaster motors based data think changing seven 800-mAh cells staying kit-supplied 8 x 4 Tornado prop good idea reference seven cells prop should result average 10500 rpm input current about 19 amps total power input about 135 watts As see just about can expect Thrustmaster han dle still give reasonable motor life fact what would try myself Electri Cub Thrustmaster motor what really would Electri Cub would use 15-size Yuk hate kind size-designation motor speed con trol know Id have model significantly greater capability completely consistent Caliph experience documented heav ily recent columns Like Caliph ElectriCub what call three-pound plane mean almost no matter what because models size structure flying intent state Elec tric theyre gonna come Out weighing some between 2 31A lb Installing 15 sys tem will push upper limit weight range will result plane plenty groundhandling capability some aerobatic cap ability did figure out self have also reader input saying 15 way go Now surely cant wrong right Anyway some specifics Based referenced Caliph work recommend consider powering ElectriCub either ferrite cobalt 15 direct drive 10 12 cells use speed control recommend 8 x 6 nylon prop 10 cells 8 x 4 12 plane think best choice 800 mAh cells 900s second Finally based reader input SURE beef up wing center sec tionyou can loop Cub have build new Continued page 154 May1988 153 49Y&Z//V RADIO CONTROL SHORTKITS FOR 25 TO 45 ENGINES VISIT OUR OUTLET STORE AT 15 MORGAN STREET IN CRYSTAL LAKE IL QUALITY PRODUCTS SINCE 1964 THESE TWINS HAVE BEEN DESIGNED BY NATIONALS CHAMPION HAL PARENTI AND REFLECT HIGH CALIBER OF MODEL ENGINEERING THAT IS HARD TO BEAT AS WITH ALL OF OUR SHORT KITS THEY ARE BUILTAROUND FOAM CORE WING AND BOX FRAME FUSELAGE FOR SIMPLE BUT STURDY CONSTRUCTION THE SPECIALLY DESIGNED AIRFOILS AND GENEROUS TAIL AREAS GIVE THEM OUTSTANDING FLIGHTPERFORMANCE THROUGH OUT THE ENTIRE SPEED RANGE NEW P-38 LIGHTNING TWIN 706495 N A-26 INVADER TWIN 685495 SHORT 1113 IHCLLIDE WING CORES CANOPIES COWLS PUNS ENGINE MOUNTS FIRE WALLS MOLDED MISC PARTS SHORT HA RD WA RE PA CKA GEAND MATERIALS LIST FOR ADDITIONAL BALSA AND HARDWARE NEEDED OROERINGSENDCHECKORMONEYORDERFORREOUIREDAMOUNT PLUS 450 PER KIT CANADIANS ADD t6S0 TO WING MEG P0 BOX 33 CRYSTAL LAKE 1L60014 ILLINOIS RESI DENTS ADD 6/% SALES TAX ALL ORDERS MUST BE IN US FUNDS SEND 350 FOB PRODUCT CATALOG DESCRIBING OUR COMPLETE LINE OF FOAM WING CORES ACCESSORIES KITS TOOLS AND MUCH MORE f/iVG MEG WORLD WAR II FIGHTER SERIES S AGM2 ZERO 54 SPAN 995 P-40 TOMA HA WK55 SPAN. 2995 P-39 AIRA COBRA 55 SPAN . 2995 P-51D MUSTANG 54 SPAN . 2995 C202 FOLGORE 56 SPAN 5 FOCKE WULF 190 54 SPAN. 2995 PHONE 815-459-0417 leads quite naturally continuation topic begun last monthnamely larger power systems using seven cells time indicated personal liking 15-size motors commented versa tility As illustration versatility slow start direction larger sys tems call attention months photos shows cobalt 15 installed believe notan Amptique WOW 15 Amptique must go like No doesnt 15 pictured powered seven 800-mAh cells swings 8 x 6 prop power level very close 05 geared systems popular Amptique plane flies indistinguishably except has lot prop ground clear ance Now would anyone put 15 such underutilization Well George Poos Fort Washington PA got tired bending break ing gear shafts plane also planning new hydro modeliS-sizedin future Knowing suggested get 15 sooner needed later project install temporarily Amptique Static motor data clearly showed motor 8 x 6 prop seven cells already plane should about same system indeed does What makes cobalt 15 practical Amptiquetemporarily notis 15 co balt relatively light small motor weighs about seven ounces physically smaller some 05 ferrites As can seen motor installs easily other 05 planes seven cells require economy charger effect what George now has sort loafing high-capability motor really great plane what also has fine motor reserve just waiting 12-cell pack some plane designed 15-size motor its stuff As noted above point illustrate what meant versatility 15 cobalt add example have personally flown 15s seven eight nine 10 12 cells have witnessed flight 14 cells thats have six motors have pow ered planes 38 oz about 56 oz have used both direct-drive gearedand just motor Now thats versatility know some readers agonize over power system selection starters Ive said times readers feel comfort able Electric actual prior Elec tric experience limited initial economy suggest carefully consider size motor first As described right first plane can delay purchase ad vanced charging system staying seven cells enjoy Electric knowing ye got motor has far capability youre ready use Now Ill betcha never thought approach Electric Elation Before leaving idea entirely must also clude fact used way 15 NOT substitute cobalt 05 ie both seven cells former loafing lat ter would typically maxed-out former running about 90-100 watts input static less half its full capability Beyond should clear same operating cur rent 12 cells 15 results 12/7 times power level 70% 05 cobalt add real zest comparison note 15 05 cobalts just about same size weight chance still some doubts should gone now 15 indeed VERY ver satile includes both cobalt super ferrite lSs latter being larger heav ier functionally same no 05 super ferrite larger power systems future Electric Model Fliers EMF Chicago all-Electric group membership 16 writing have anxiousness attract other modelers same persuasion club has nifty monthly newsletter Current Flow places fly club based Chicago metro area informal fun-fly-orien Continued page 160 Stand Off Scale Extra 230 Kits Now Available Three Sizes 30% Scale Kit ~ pIUB5l5BhIppIBg 113 Scale Kit 96 plus $15 shipping 114 Scale Kit ~ plus 510 shipping Cash VISA Certified Check R/C EXTRAS 712-943-4102 RR1 Box 28B Sergeant Bluff IA 51054 Pat gine NunbtDslanceSize Size 96355 31 9 95 0630019651395 65500553260 901495 0660565329512595 FF7507532 1595 633s130eOaorz FF850 0365 zln 2995 Ie Ii AMERICAN JR OM RIDGE CAMPBELL T RITE DUBRO EASY BUILT MODELS FLYLINE FOX BERG DUBOIS LOW K&B MICRO X OS MAX RA PECK-POLYMER ECT MODELS SEAGLEN STERLING IVAN SUPER TIGRE INDER FLITE LER WILLIAMSS PRODUCTS RS ESTES MODEL ROCKETS Send SI Caub Check Stamp 32 page tabloId duel DISCOUNT Catalog 900 illustrations oFo 700 Kits choose Iron MAILOROER PHONEORDER IN STORE PENN VALLEY HOllY CENTER 837 W Main St Lansiam1a 19446 154 Model Aviation AW7 NEW Scale RFBOO Dual Strut Nose Gear ho liszt hoFO ShiFfung OW ha FullS Tooling PO Box 95 Champaign IL 61820 180260 Octued RC Electrics/Kopski Continued page 154 ted organization members wish promote fact Electrics fly well help new comers Electric endeavor good info came editor Current Flow Steve Moskal Steve can reached 30 S Ken sington Ave LaGrange IL 60525 tele phone number 312 354-2803 Interested mod elers might try giving Steve shout tell im Bob sent yal Andmy own best wishes EMF Oh woe unbounded griefl Another column endingwith much left pass along next month Happy silent landings everyone RC Aerobatics/Van Putte Continued page 51 aileron side wheel want get aileron differential high-wing airplane both techniques must re versed ie bend aileron torque arms back attach pushrods aileron servo wheel side opposite ailerons Doubting Thomas letter writers mailed copy Figure 4 shows what hap pens have equal servo output same both directions low-wing airplane can clearly see Up Down use both techniques youll get differential really surprised number letters received about design tips Id included March 1988 column uniformly en thusiastic support of same kind design ideas So next month Ill include some ideas proper design vertical fin tales about tails RC Pylon Racing/Hager Continued page 52 very consistent work up slowly towards prop speed Take time work fuel system including shutoff until works flawlessly Airplane balance control Another com mon mistake opinion fact people set up airplanes too sensitive controls Concentrate flying smoothly like tame airplane down desensitizing Kits controls Use enough get airplane Item around course Too much throw can get Thunder trouble make erratic flying Use QIt full travel joystick order get maximum resolution feel setup critical surface elevator China Make sure CG comes Out exactly mdi- Clipper cated plans Start off recommend- T-railed ed throws listed plans Fly airplane set throw elevator full stick trav el obtain turns radius slightly smaller 100 ft enough al- Spickler lows start pylon 2-3 turn slowly using maybe half stick travel around No 2 end up Texas Out going around No 3 stick bottomed out law always pull full Up elevator No 1 except first lap Stay same altitude around Scat Cat course Try climb dive too much Next like set ailerons up slow airplane would just barely roll twice going down straights gave full aileron throw set up rudder get minimum travel possible smallest servo output wheel using farthest hole control horn throw ends up too much fore takeoff end up using about V Right rudder travel stick closing want stress again pure speed what wins race Being consistent flying smooth tight wins race Thanks Tom rest list people compa nies sell Racing products list began April 1988 column Quickie 500 Manufact urer Phone Address Pauls Fly 619 743ing Stuff 5458 Paul Steinberg Model Tech California Speed Products PO Box 121 Escondido CA 92025 Hobby Stores 714 661- 32221 Alipaz #15 7430 San Juan Capistrano CA 92675 Hobby Stores Spickler Models Ritchs 713 661Hobbies 5458 Dick Ritch Flue Line Models 4104 Lark Houston TX 77025 Hobby Stores Continued page 162 install hinges hate Try Easy Hinges See Difference single slol s few drops C/A glue ssd its dsne No geuging pinning sr hinge pins wsrrs absuf Iscredibly strssg Virtually indeslructible 24 hinges 295 e e4 oa Za en INE PO Box 1743 Marcos CA 92069 flUe W fl1SiX V1W CWit fl5 LW ISUhuhIt ccie Ia m5uled Hal & mnd Lanai Wzdsgl j um _ntomrss 4 Power Only certified checks money orders accepsed Minimum order S1OO0to three packases 4 Powerpoles 5315 per pasfsage siCto shipping Sendlinat CT rnsidenfs add 75% sales tao Prices sabiect c5angenithosf notion DEALER iNQUiRIES INVITED farther information deale prices send SASh Basiness Card SERMOS RIC SNAP CONNECTORS Cedas Canes S Box 16787 Slanted CT 069203322-6294 160 Model Aviation qowsagSnrx zun IW Cussomlzed nawest German engInes noefrom vault Muffiw Mount MountIng Bolts y Presmirs Tap Smoke Carburetor LInkage CDI IgnltlonfCl4 EleclronloaL 48 Volt IgnitIon Pack Safety a0 Sitdi SIx-Bolt Hub ResIstor Spark Plugs Veer Wanenty Faulty Paresand WakmuultIp TaG MFG 857 High Mountain Rd North Haledon TO Law 200ulyRowhi Glese body wheel pant. end cowl P ft N5flO 51011 Poem wing al bale Included Sach 31 wllh points Included avahleblel Mw2pI--mn-i EDO FLOATS /a SCALE 46 LONG SEND $200 FOR COMPLETE CATALOG OF FINE KITS IKON NWST P0 Box 306 MA ~ PosI Falls ID 83854 yr 081 7739001