George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS
Edition: Model Aviation - 1990/06
Page Numbers: 40, 41, 42, 43, 119, 156
George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS
Edition: Model Aviation - 1990/06
Page Numbers: 40, 41, 42, 43, 119, 156
George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS
Edition: Model Aviation - 1990/06
Page Numbers: 40, 41, 42, 43, 119, 156
George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS
Edition: Model Aviation - 1990/06
Page Numbers: 40, 41, 42, 43, 119, 156
George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS
Edition: Model Aviation - 1990/06
Page Numbers: 40, 41, 42, 43, 119, 156
George M Myer D Radio Thchnique 70 Froehlich Farm Rd Hicksvulle NY 1801 ABSTRACT CaRa Automatic Cycler-Charger Danger Channels Only thinking Car ing Ni-Cd batteriesPart 3 Quick Chargers BY WAY review four types chargers Ni-Cd batteries Fast Quick Over night Trickle cant know what kind charger dealing until know two things 1 The current charger putting battery 2 The capacity batterys cells capacity cell represented C measured ampere-hours milliampere-hours small cells Charge rates range C/3 C/6 define Quick Charge situation Quick Charger will recharge Ni-Cd pack three six hours rate preferred some engineers because faster normal yet pro duces less heat presents less risk damaging Ni-Cd cells causing vent does Fast Charging concern comes fact charging process electrochemical generates gas exothermic gives off heat Both gas pressure heat function charging rate maximum pres sures temperatures determined part way cells constructed higher rate greater risk Simply stated dont know cells constructed Quick Charging safer Fast Charging hurry As general rule battery packs should always removed equipment whenever being charged Things can go wrong best equipment remove batteries during charging limit thepossibility contingent damages remember back friend bought five fancy new chargers day came home find live transmitters distorted cases cause something happened five charg ers away later figured Out chargers same line wash ing machine line surges damaged electronics chargers generic weakness happened days before cheap surge suppressors avallable Today can buy good surge suppressors practically anywhere less $20and should Surge suppressors arent just protect computers Jse kind electronic equipment VCRs automatic battery charg ers simple charger came RC system provides virtually no protection against surges lightning strike power lines near house have everything plugged charger could damage whole RC sys tem also good idea add fused grounded plugs metaLcased equipment doesnt pro vide adequate internal fuses work over concrete floor near kind grounded metal like water pipe ground fault interrupt GFI 1 10-VAC wall socket good invest ment will oniy cost about $12 Sears could save life have bath room kitchen over metal sink said should mention CaRa Auto matic Cycler-Charger internally protected agalnst surge currents example Quick Charger found CaRa Automatic Cycler-Charger tended serve semiautomatic universal bat tery management tool switch-programmable charger dis charger contains built-in power con verter can plugged cigarette lighter automobile 1 lO-VAC house cur rent unit can beand often iscustombuilt suit particular needs customer standard unit services four- eight-cell 500- 1 200-mAh batteries unit services cighte nine-cell batteries cells rated 500 0 0 front roar panels Cycler-Charger look simple Its hard understand can things its capable else fails read directional rear panel has two receptacles phono plugs can acQommodate Y-oublecI leads tq increase number charging ports available Note unit can used house current plugged cars cigar lighter Useful 40 Model Aviation CaRa Automatic Cycler-Charger keeps everythIng ready go Note George main taining NI-Cd battery packs RC seaplane electric-powered RC boat used rescue seaplane HelicQpter requires two packs long-necked glow-plug lighter 1200 mAh four- five-cell batteries cells rated 100 1200 mAli Any CaRa Automatic Cycler-Charger will Measure charge remaining battery display digitally B Quick-charge battery C Maintain several packs trickle charge si multaneously D Diagnose battery wiring problems After setting few switches can push button A-B-C B-C just C automatically leave unit loosely watched doing After carefully reading through manual wrote myself checklist stuck top case Since universal tool options review time use dual-rate servo-reversing switches transmitter buddy Bob Aberle has units couple years loves warned pay attention switches back CHECKLIST 1 CHOOSE NUMBER OF CELLS IN BATTERYon back panel 2 CHOOSE CHARGING CURRENTon back panel 3 CONNECT POWER SOURCEuse 110VAC 12-VDC cable 4 CONNECT PACK GREEN R RSEDuse RX TX cable 5 SELECT DISCHARGER LEADon front panel 6 PRESS RESET amber LED must glow front panel 7 PRESS CYCLE red LED must glowon front panel Note Green r always means re versed polarity reversed polarity does always produce Green r display have check use polarized plugs use Deans connectors available Ace RIC Inc simply plug transmitter re ceiver packs have Trickle Charger Addi tional transmitter receiver trickle-charge ter minals require special cords located back unit can example completely service transmitters flight bat teries three airplanes airplane Helicopter unit leaving connected permanently trickle charger tween flying sessions press Reset button batteries con nected Rx Tx leads will constantcurrent charged high rate indicated orange LEDs Charging will terminate whatever charge used has replaced batteries connected trickler terminals back panel will remain trickle charge high-rate charging terminated voltage-drop detector VDD current lead drops trickle rate indicated green LED press Reset Cycle button battery connected lead selected Select switch will constant-current discharged rate 270 mA indicated red LED rate chosen avoid possibility blowing out fuse sometimes put side transmitter manufacturer ter will light up indicate energy discharged mAli discharge terminates dis charged battery will recharged high rate selected back-panel switches indicated orange LED until terminated VDD charger will revert trickleContinued page 42 ELLERS Sound Supression Design High Thrust Efficiency Constant True Pitch Long Fiber Advanced Composite Material Proven Performance US Masters US Nationals Canadian Nationals 1989 World Championships Competition Sizes 9x6SIBBEACH 9x7SIBBEACH 9x8SiBBEACH 9x9SlABEACH 9x10$199EACH 10x6$229 EACH 10x7$229 EACH lOxES22BEACH lOxOS229EACH lOxID$229EACH lixES249EACH 11x7$24BEACH lixO$24SEACH 12x6$2B9EACH 12x9$2B9EACH lixiG$795EACH lixil S7B5EACH 11x12 S795EACH 11x13 $7S5EACH 11x14 $795EACH 12x9 $795EACH 12x10 S7B5EACH 12x11 $795EACH 12x12 S795EACH 12x13 $7B5EACH 12x14 5795EACH 11x12W $795EACH l2xlOW 57B5EACH 135 x 125 $1295 EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH lxB$159EACH 7x9$159EACH ixiGSI5BEACH 8x4$179EACH 8x5SIlBEACH 8x6SIlBEACH 8x7S17SEACH 8x8$17BEACH 8x9SIlBEACH 8x10$17BEACH 9x4SIBBEACH 9x5SiBSEACH Contact local hobby dealer Manufactured Landing Praducts Knights Landing Califarnia June 1990 41 Sports Sizes NEW 4SY SERIES 100 THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTOGIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIA PITCH THP PRICE 1266Iz77Vz8 13677/z8 14677A8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIA PITCHPRICE 5S/34 634 72833Iz45B 833I4568 845667 94566,77 104566A7 106W8W 106EW Ii46777Iz78 115W 116EW 1167 124W 125W 1256 1356 1456 1556 164N 16678 RC PYLON RACING SERIES 500 DIA PITCHPRICE 7 5N5N 8I 6778 SERIES 400C 9777 W WIDE BLADE EW EXTRA WIDE N NARROW charge mode indicated green LED pack connected other front panel lead will quick charged orange LED illuminates drop back trickle green LED Only lead Selected can discharged Other batteries connected unit will remain trickle charge final indica tion energy discharged will held display until Reset button pushed MEASURED PARAMETERS RX charge current constant current same four- five-cell switch position Current-regulator switch position LO NORMAL HIGH LED Charging current mA AMBER 100 AMBER 280 AMBER 450 RX trickle charge current 8 mA currentregulator switch position GREEN LED RX VDD charge cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size switch position 4 cells S cells Charge cutoff 632 VDC 790 VDC RX discharge current Red LED mA same switch posi tions Rx discharge cutoff points Battery-size Discharge cutoff switch position 4 cells 45 VDC S cells 565 VDC TX charge current Amber LED mA switch position Green LED A switch position TX VDD charge-cutoff points voltages function cells being charged temperature values given just examples taken unit batteries Battery-size Charge-cutoff voltage switch position 8 cells 122 VDC 9 cells 137 VDC TX discharge current Red LED mA same switch posi tions TX discharge-cutoff points Battery sizeDischarge-cutoff switch position age 8 cells 90 VDC 9 cells 100 VDC Current drawn 12-VDC car battery Cycle-Charger alone 235 mA trickle charge 245 mA high-rate charge 845 mA Discharging pack 375 mA Trickling six 500-mAh packs mA Notes 1 dont get red yellow green LED system worklng 2 optional trickle-charge cables plug phono sockets back Cycler-Charger service two units per cable assembly pair wires contains green LED indicate batteries connected plus limiting re sistors match capacity cells being maintained Type cableTrickle-charge current 4 5 small 100 mAh cells2 mA 4 5 normal-size cells7 mA 4 5 high-capacity cells12 mA 8- 9-cell transmitter battery7 mA Other sizes obtainable request back Cycler-Charger normally con tains socket transmitters flight batteries giving total six trickle-charging connections per unit trickler circuits sized five 1 200-mAh four-cell packs plus three 1 200-mAh transmitters have quite bit latitude doubled number tricklecharge cables Rx plug account extra gyro pack Helicopter could get same result phono Y connector Radio Shack 3 initiate discharge battery low discharge cutoff voltage eg Battery al ready discharged wrong switch position dead cell battery battery may discharged 0 volts So shouldnt come home flying hook up unit push Cycle go bed Check unit time time unless until have green LEDs glowing 4 Hi/Lo switch Lo should Hi charger circuit may switch trickle Any battery gets warm Lo set ting should charged Hi setting Con versely Hi/Lo switch Hi should Lo charger may drop trickle prematurely Again have pay atten tion what doing 5 data taken particular unit reflect accuracy particular test tools may measure different values should able recharge batteries af ter flying leave up three planes three transmitters connected just Cycler Charger unit can left connected car battery overnight worry ing will leave stranded morning given car battery reasonable condition does leave stranded better have cars electrical system checked way manual full bandy hints should read carefully example manual says Cycler-Charger can used car engine running handy personally dislike units cant used way information should have con fidence using tool service practically RC system Ni-Cd battery pack containing four five eight nine cells Given knowl edge performance cells can de cide whether should used tended purpose tool highly automated requires some intelligence use After working few hours test parameters found switch-setting actions automatic too dont have look behind Cycler Charger set switches Since Bob Aberles has worked years attention expect will too price looks high until consider what unit will make use services price gets pretty reasonable Ralph Croaning offers recalibration $10 includes update latest configuration no additional charge plus return shipping says very few people make use Ralph thinks should see unit two years 42 Model Aviation THE LEADER IN COMPETITION PROPELLERS * K blow dust Out Compendium CaRa Automatic Cycler Charger CaRa Products Canton SD 57013 $23995 Trickle-charge cables cable sembly services two identical batteries$5 Otber options$15 Several reader letters have asked What AMA going 1991 crystal ball good know plans au thorize 50 channels RC 11 through RC6O use AMA-sanctioned events January 1 1991 ultimate decision rests hands Executive Council body has until closing date 1991 Membership Manual September 1990 make up its mind hasnt done already As written February 1990 FCCs Type Acceptance criteria still pass what describe wideband RC systems AMA leadership has talking years about asking FCC change what call narrow band criteria nothing has come Editors note AMA has submitted petition FCCand FCCS answer ex pected time RMcM Now want opinion will say looks narrow-band transmit ters will required AMA sanctioned events 1991 narrow-band receivers like no requirement Virtually transmitter now production already narrow band Most wideband transmitters still service can narrow-banded manufacturers shop about $15 great simple exercise logic will reveal really need dual-conversion narrowband receiver survive 50-channel environ ment regardless what says Member ship Manual obvious 1982 still Ive saying column eight years Some people want cling even-numbered channels have legal right home fields AMA cant afford national level have explained several times recent past AMA must sanction 50 channels will certainly lose 50 Recently some members American Model Yachting Association boaters equiva lent AMA proposed channels ever AMYA policy Thats like inviting fox henhouse sake skeptics let point out Robinson Engineering Company has al ready applied FCC use 75-MHz Non-Aircraft channels control overhead cranes has received temporary waiver good until 1993 AMA has opposed contin ues spend money oppose continu ation waiver Because merely rat ifies prior illegal use channels given exclusive use modelers Secondary Users December 20 1981 know what will happen waiver con tinues First Robinson Engineering will apply Primary User status might get will complaints about dangers inherent letting us continue use chan nels let go unchallenged will lose channels model use know about Primary Secondary Users dont always have Sec ondary Users means interfere Continued page 119 STITS PLAYBOY 1/3 SCALE 88 J3 CUB 1/5 SCALE 85 June 1990 43 STINSON SR-B 115 SCALE 100 PILATUS PORTER GIANT SCALE 98 WACO 10PIPER SUPER CUB 1/5 SCALE 731/4 SCALE 107 MONOCOUPE gOACORBEN SUPER ACE 114 SCALE 961/4 SCALE 80 TAYLORCRAFTCURTISS ROBIN CHALLENGER GIANT SCALE 901/5 SCALE 98 tube help line up nose gear arm rudder servo Drill /l6 hole brace slide over tube glue fuselage crutch other fuselage bottom Trim ends both tubes extend beyond bulkheads F-5 F-3 firewall Glue forward 34-in-sq maple servo rail place Note locations rudder elevator throttle servos plan rudder throttle servo output arms must line up appropriate pushrod guide tubes Use servo measure spacing location rear servo rail glue place Again use servo locate mark mounting holes three fuselage servos Drill /i pilot holes servo mounting screws rails marks Install three servos fuse lage between rails Complete assembly Sullivan throttle nose gear pushrods Attach pushrods throttle lever nose gear steering arm appropriate servo output arms Make up linkage rods elevator rudders Pushrod wires /i6 X 12-in size available Sullivan Sig Manufacturing Du Bro Products Carl Goldberg Models Thread clevis onto pushrod halfway down threaded end use Goldberg Pushrod Connector Du-Bro EZ Connector Z-bend connect pushrods servo ends Before connecting elevator pushrod slip -in Lite Ply F-6A pushrod guide over After rod connected elevator servo con trol horn glue F-6A pushrod guide F-6 prevent pushrod flexing under flight loads An optional Vortac Manufacturing Bomb Re lease Mechanism exploding bomb installa tion illustrated plan course bomb doesnt actually explode its talcum powder load makes great visual effect bomb hits target exciting feature desired fit parts its installation point radio system least five channels will required bomb release option used Cut slot release mechanism floor fuselage Glue two scraps %-in Lite Ply inside floor mounting screw locations Drill two holes screws mount release mechanism Use doublesided tape mount fifth servo onto piece /8-in Lite Ply scrap glue onto ward fuselage floor Linkage servo release mechanism length radio dial cord nonstretching wire string Cut two holes rear fuselage side radio systems on/off switch charge jack Lo cate devices side model opposite engines exhaust Plug switch elevator servo throttle servo rudder servo ail eron extension cable receiver add sec ond extension cable bomb release servo youve used option Wrap receiver battery pack -in foam rubber install front servos behind bulkhead F-5 Use enough foam prevent components moving about inside fuselage Glue two / x -in spruce servo mounting rails place front rear aileron servo opening bottom wing Drill /16 pilot holes mounting screws mount servo wing Make p aileron pushrods same manner did elevator rudder pushrods Plug aileron servo its extension cable receiver check smooth operation both ailerons Check models control surfaces suffi cient throw correct travel direction surface flight training purposes eleva tor rudders ailerons should set throw irection Nose gear travel should about % in direction Confirm models center-of-gravity empty fuel tank Tamecats nose should tilt down two degrees balanced point exactly inch front wings main spar Make absolutely sure before attempt ing fly Flying what Tamecat does best After suc cessfully completing customary range check taxi out point nose wind apply throttle As airplane reaches flying speed gentle touch up elevator will lift smoothly air As would new model ready make minor corrections models attitude Mostly though just relax enjoy easiest-handling airplanes youll ever have pleasure flying model will go exactly aim displaying its very gentle handling characteristics throttle setting Landings what should expected friendly sport planean extremely long powerdown glide no tendency toward tip stall Just point Tamecat spot runway throt tle back glide onto Add power youre short prepared go around again youre too steep Youll really love model final approach interesting feature Tamecat will teach student use elevator trim efficiently other models air planes need pitch trimming fuel tanks empty Tamecats long nose lets see trim changes little better think youll agree students can benefit greatly extra lesson especially since model teaches gently recommended control throws CG position F-14 Tamecat will re quired maneuvers trainer envelope plus few extras Loops lazy rolls sustained inverted flight stall turns Immelmanns split S pleasure perform model stays right target never gets squirrelly Slow fly bys simply magnificent little aerobatics agility desired just move models center-of-gravity back inch balance model main spar crank up aileron elevator surface throws watch Tamecat run rest pack model can teach very basics yet grow right along flier progresses through mild aerobatics instruction sport/training model meets design goals exceeds mimics jet fighter appearance yet sacrifices friendly flying stability easy building quali ties todays top-notch trainers first time see model air twin rudders long nose will prove well-behaved model can still sport fiercely aggressive image Sure Tamecat resembles supersonic ducted-fan-powered accurately scaled-down F14 Its bluff underneath facade no awkward ugly duckling sport/trainer looks someone might actually want own Just wait until flying buddies check Out ferocious-looking Tamecat prowl target urr-r-r-r-r Radio Technique/Myers Continued page 43 anybody must stop transmitting other hand interfere us have no rightsContinued page 156 UURUI-iA RTANKS & SUPERMUFFLERS ZINGER WOOD PROPS GIANT SCALE R/C PLANS 1IJOO QUADRA RT 1 NEODESHA KS 66757 316325-2821 DEALERS CALL SEND $1 FOR COMPLETE CATALOG June1990 119 AT LAST An Effective High Tech Engine Cleaner R/C Engines Just Bruah & Carbons Gone-Guaranteed ONLY $695 CA rusidenta add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 DEALERS INDUIRES WELCOME Pwcakeet Supe Thco4 PeaqItua4 40. FREE CATALOGf l{sbLzajLeui6a M 468 Cypress Rd. Ocala FL 32672 687-1702 FULL BODY PILOT KIT DARNED GOOD AIRMEN Contains pilot head hands boots helmet Lightest pilots available Lifelike vinyl latex rubbercap goggles full templates easy instruc- tions Easy assemble finish Some simple sewing required Fully Build Sportsman Barnstormer Full Body Bust ositionable too BUST PILOT KIT Price Contains pilot head helmet sport cap goggles#206 acae895 jacket Easy assemble finish#205 scae995 PrIce#204 scae095 #108-iA scale NEW 595#203 acae695 #106-/ scale695 #105-% scale. 795 SinS-lA scale. 895Some 1495 ewing quired SPECIALISTS IN CUSTOM COX TEE DEE & REED ENGINES 020S 049S 051S074S& 09S ALL CUS TOM & STOCK PARTS VAILABLE INDIWDUALL V COMPETITION ACCESSORIES & CUSTOMIZED K&B ENGINES RACING WHEELS KLOTZ OIL CARBON FIBER SOLID LINES ALL KINDS OF FUEL TUBING FOUR BRANDS OFGLOWPLUGS HARD-TO-FIND HARDWARE OLD TIMER SUPPLIES COILS CONDENSERS NGK & STIlT SPARK PLUGS SILK 12 COLORS QUALITY DOPE BRUSHES 5& 7LOOP 1/4RUBBER BANDS TRANSISTOR IGNITION SYSTEMS RESISTOR HIGH TENSION LEADS 1/2A TEXACO PLA YBOY SR KIT 1/2A TEXACO ENGINES & PARTS KSB & IGNITION TIMERS RUBBER POWER KITS PROPS TISSUE AND OTHER SUPPLIES CYANOACRYLA TES & EPOXIES JET PILOT KIT Pilot has molded jet helmet Contains face mask oxygen hose Extreme ly Realistic Weighs less oz Price #308- scale 595 #307- scale 695 ORDERING INSTRUCTIONS See dealer first order direct Add $100 shipping NYS residents add 7% tax Send check money order CODS OK Send $100 catalog Radio Technique/Myers Continued page 119 Whatever suppose inspires club skeptic doubt people out eyeing Aircraft Only unused chan nels trying figure out take away us Lets say local skeptic says So What OK point out him reason wants keep channels forever can continue use obsolete equipment will see interference anybody else using odd-numbered channels So keep ing fellow RCers off odd-numbered channels doesnt protect old junk just gives away hobby channels forever thinking presents same risks us does boaters RC Aerobatics/Van Putte Continued page 45 regular sunglasses Safety Plus glasses dont need use Rons thoughtful gift rediscovered something recently deserves passed Since Im between Pattern air planes right now wanted some flying during judges training sessions clubs annual Pattern contest decided prepare old sport airplane fly airplane hadnt flown several years aileron-to-wing gap sealed normally seal aileronwing gap Pattern airplanes con sciously reflect Well first tempt Pattern flight sport airplane re minded gap should sealed After flight judges commenting jerkiness constant corrections observed roll axis during looping ma neuvers airplane Bingo hit reason seal aileron-wing gap leaks air Sometimes gap leaks both wings other times leaks wing necessarily same wing time causes airplane unstable roll dur ing loops since wing leaking gap loses lift Lesson relearned Seal aileron-wing gap stability roll during looping maneuvers RC Slope Soaring/Triebes Continued page 49 run-of-the-mill 6-ft-span kippers attempt quantify its F3F performSee Dealer add Dol dit-ect order handling ance group us have conducted trial over F3F course local slope typically Brit ish Slope weather ie some good air some bad air etc results show B3 bit good D3 won Viking Cup event Derbyshire 1987 have maintained unbeaten record domestic F3F competitions nearly two years new model particularly suited reversal tech nique unusual amongst F3F fliers has certainly proved effective especially steep lift gradients Airfoil design testing debate over what airfoil best use given set condi tions has existed long airplanes have flying certain airfoil may have particular ad vantages low speed may also have some definite disadvantages high-speed flight An other airfoil might just opposite being ideally suited high-speed work Yet another may compromise between two work fairly well conditions However look now have virtu ally endless list airfoils choose can get exact performance parameters looking Much recent work airfoil design US has done Michael Selig John Donovan results testing have sparked what seems endless debate accuracy airfoil testing its application real wings Im going go intricate de tails criticism testing has elicited short explanation testing techniques re sults Selig Donovan another member airfoil research team David Fraser Heres what Michael John David say June issue Slope Soaring News article 5D6060 article quite informative few points need amplification couple wrong Im hoping can clarify points First statement [Reynolds number] refers number air molecules flowing across wing Simply put larger number air flows over wing correct Reynolds number usually abbreviated R Re Rn measure ratio inertial forces fluid air example viscous forces Osborne Reynolds hydraulics engi neer England late 1800s investi gating flow characteristics channels pipes discovered dynamics flow dependent size speed provided certain quantitynow called Reynolds numberwas held constant 156 Model Aviation OUR REV-UP INVENTORY VERA GES OVER 9000 PROPS I! IMMEDIATE SHIPMENT ON VISAIMC ORDER BY MAIL OR PHONE 519 728-4355 SORRY NO COD VISA & MASTERCARD WELCOME MINIMUM MERCHANDISE ORDER $1000 SHIPPING & HANDLING FEE $200 FOR INSURANCE ADD $100 STOCK ORDERS SHIPPED WITHIN 24 HAS