George M Myers JIcZ ZLyfizzi 70 Froehlich Farm Rd Hicksville NY 11801 SMART CHARGER/CYCLER purchased SR Smart Charger/Cycler SC/C SR Batteries Beilport NY 11713 tele 516 286-0079 Fax 516 286-0901 $29995 list should want another charger/cycler Well SC/C sophisticated battery charger available hobby Aimed Electric airplane market 12 VDC-powered SC/C CONSTANT CURRENT charger delivering 01 50 amps adjustable 01-amp steps services widest range cell sizes numbers functions controlled user-programmed microcomputer Fast charging terminated time peak voltage detection and/or temperature rise Discharging terminated time and/or minimum voltage panel meter displays current time voltage other information like meters chargers Lets see what can 1 SC/C can used fast charger time temperature rise peak voltage detection terminate charge internal circuitry multiplies input voltage sufficiently fast charge two 28 Ni-Cd cells same time same state discharge same cell type rated 100 5000 mAh SC/C reverts slow charging fast charge completed As example can charge four seven-cell 1 200-mAh Ni-Cd power packs same time also can fast charge electric razor electric screwdriver flashlight laptop computer transmitter receiver power batteries Electric airplane helicopter 2 SC/C can used constant-current slow charger overnight C/l0 two 28 cells requiring rates 5 200 mAh means can charge cells rated 50 mAh through 2000 mAh covers almost anything can think model category nothing prevent charging two transmitters three four-cell flight packs series long batteries constructed cells same rating 3 SC/C constant-current discharger discharge rates range 01 amp through 10 amp should satisfy battery test needs panel meter shows discharge current voltages discharge time 4 SC/C includes temperature probe Heat fast charging damages batteries crashes can bury sensor inside pack use control fast charging Additional sensors can purchased $5 $9 want Molex plug fits SC/C front panel SR battery packs now made sensors built prices quoted 5 fast field charger function included receiver battery packs select function charge pack rating eg 300-mAh pack gets charged 300 mA charge rate reverts slow charge charging 75% complete varies ambient temperature measured probe 6 SC/C includes 250-amp meter motor tests Have tried find lately Additional features Both input output reverse-voltage protected fast charging battery pack reverse voltage could kill and/or charger SC/C warns shuts off source voltage drops too low run charger may save launching flight assumption batteries folly charged theyre no particular concern time purchase computer program limits can changed burning new program EPROM job do-it-yourselfer box has convenient handle carrying includes thermostatically controlled cooling fan switches itself needed course runs fulltime order cool discharge elements performing discharge test MICRO-AVIONICS NEWSLETTER Heres letter received Dave Ewen 4241B Valley Road Drexel Hill PA 19026 30 Model Aviation Abstract 1 Smart Charger/Cycler 2 Micro-Avionics newsletter 3 Suggestions micro-avionics developments LfluCK vimons Iox Eagle 60-powered Lanier Caprice aka Myers Marauder uses wheels floats Chuck North Pole Alaska flies Midnite Sun R/C Club Fairbanks read interest historical notes Radio Technique has existed past 16 years am sure whether implies end columns emphasis electronic elements hobby No doesn tGMM have enclosed initial copy newsletter intended RCers have willingness skills necessary get inside electronics have hopes making hobby building servicing electronics economically feasible again will write again 16 years say whether has success enclosure Dave mentioned 52-page loose-leaf package color-photograph cover letters experimenters around world 17 articles newsletter intended provide forum hobbyists interested experimenting microsize electronics RC aircraft first issue addresses such subjects telemetry flight instrumentation airborne video microprocessors gliding parachute testing back book filled ads interesting gadgets such microminiature TV cameras very inexpensive computers worthy effort wish Dave success projected cost $5 semiannual publication two newsletters per year SUGGESTIONS FOR MICRO-AVIONICS DEVELOPMENTS Dave Ewens mission set thinking people want develop electronic gadgets model airplanes what should develop Im asked question time time first project Dave Ewen friends might consider developing device keep large man-carrying aircraft crashing tiny hard-to-see models Ive bad experience being head-on Stearman biplane piloting man-carrying Cessna 172 800 feet landing pattern small airport expect stupid things like around uncontrolled airports estimated distance size started avoidance turn estimate seriously wrong time realized Stearman quarter-size model too close avoid Fortunately model pilot split-Sed right time What would have happened pilot beginner Beginners always fly too high know AMA Safety Code states some insurance requirements mandates 400-ft altitude limit vicinity airports makes no difference altimeter therefore knew published pattern altitude correct ground track airport makes no difference modelers insurance would have voided fact above 400-ft limit place time model flight level path headed wrong way collision could have disastrous both us could use altitude telemetry modelsright now way visualize lightweight transmitter RC model airplane can report airplanes altitude scanning receiver ground club Safety Officer can monitor transmissions take appropriate action club would need few transmitters transmitter channels receiver because rare see five planes air once except Sailplane meets full-scale helicopters fly anywhere want know police helicopter came back hole canopy injured observer hit small bird grebe flying low along beach theyd hit goose observer would dead Birds general maneuverable models bird couldnt avoid helicopter what makes think can model first rule printed back Grumman Engineers Model Society membership card pilot must accompanied observer watch golfers runway helicopters flight zone anything else can interfere flier fields have visited various states have same rule about field An old rule road requires faster moving vehicle stay clear slower ones Therefore free balloon sailplane has right way over 747 model has right way over aircraftincluding helicopters balloon sailplane stay out clouds rule can work because both aircraft large enough seen Continued page 114 July1992 31 Left The SR Smart ChargerlCycler fast charging two battery ~CK5 iemperaxure sensor caie runs vicinity SR label Thinner wire will used production items Right Internal view SCICcomputer-grade components mu-spec construction Use bent T pin remove Sermos contact its spring pull contact out shell cleaning VACUUM BAGGING SUPPLIES CARBON FIBER LAMINATES 007 014 022 & 030 Thick ~RoHACELL Light Rigid Foam 1 2 3 mm GLASS CLOTH 58 ozIsq yd 7515 20 30 & 4 07 CARBON OR KEVLAR MAT 2 4 5 07/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 oz/sq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERD5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 ZThe Source Lightweight Materials RC Flying Today/Myers Continued page 31 really Sailplanes Im talking about full-scale ones virtually invisible some aspects Models invisible distance avoidance turn full-scale plane possible Sailboats theoretically have right way over oceangoing supertankers fact miles water needed stop turn supertanker Remember Bligh Reef near Valdez Alaska hard see sailboat several miles away Like sailplanes sailboats invisible some aspects So sailors intend sea night will shine light sail hoist radar reflector mastheadfor own good could use similar equipment RC models might simple aluminum foil used shear web spar built-up wing act radar reflector might active transponder Whatever form takes would useful wherever radar-equipped full-scale aircraft fly general fly over 3000 ft above ground level also vicinity airports term vicinity airports wants amplification Long Island New York live 128 miles long 30 miles wide whole island large airport vicinity Long Island supports four international jetports four large general aviation airports military airport several smaller airports also about 30 model airports marked Sectional Chart look Sectional Chart see Long Island covered altitude restrictions believe floor airspace man-carrying aircraft should ceiling models Id like see AMA Safety Code updated conform idea wont happen unless until reasonably priced altitude telemetry available permitted us FCC Continued page 116 114 Model Aviation August Sanctioned Events Calendar Continued PA AUG 2Marshall Creek PA 1992 Pocoio Pattern Payoff 401 -402-403 404 & 406 Contest formerly known RAMAC Beginner Pattern Contest Contest limited 40 contestants Pre-registration available Site Delaware Water Gap National Prk River Rd H Hochradel CD 77 Hunters Ln Sparta NJ 07871 PH 201729-6405 Sponsor ROXBURY AREA MAC IL AUG 2Country Club Hills IL C Ray G Memorial Giant Scale Contest restricted Giant Scale aircraft Site Flosamoor Rd & Central Ave P Frankenthal CD 16730 Meadowdale Dr Oak Forest IL 60452 PH 708-560-0057 Sponsor SUBURBAN AERO CLUB OF CHICAGO NJ AUG 2Middlesex NJ AA Middlesex Modelers Stunt Contest 322 323 324 325 326 Old Time Stunt safely thongs no deviations Site Club Field M Spedaliere CD 123 Birchview Dr Piscataway NJ 08854 PH 906-563-0562 Sponsor MIDDLESEX MODELERS NJ AUG 2Allentown NJ IA 14th Annual Garden State Soaring Classic 444 J 0 Pre-registration required Cut off July 22nd Limit 7 per freq Site Allentown HS Athletic Field Malyi CD 2102 Ousil Ridge Drive Plainsboro NJ 08536 PH 609275-0549 Sponsor MILLSTONE VALLEY SILENT FLYERS Ml AUG 2Genesee County Ml C Competitive Fun Fly Two Categories Mixed Controls & Non-Mixed Controls Site Ed McCants Memorial Fid J Von Linsowe CD 4509 Thompson Rd Unden Ml 48451 PH 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NECESSARY TEMPLATES BILL OF MATERIALS NO BALSA INCLUDED ORDERING owd jtcue 306 E Simmons Galesburg IL 61401 - & 3093423009 AMA has begun collect LatlLon model airports MAPTs FCC might persuaded give us altitude telemetry radar transponder privileges requested another part integrated safety package included giving FAA locations MAPTs Sailpianers Old-Timers tend fly limit ability see control model depending size up one-half mile above pilot Ive come upon RC Sailplanes flying 2000 feet above ground puts models up among big airplanes speed limit 200 mph Its like roller skating interstate highwaydumb Sailplanes whether models manned virtually invisible some aspects wonder few knocked down larger faster aircraft often mangled sailplane pilot falls earth No knows fatality usually ascribed structural failure turbulence Perhaps turbulence vortex trailing heavy jet Ive hit wake turbulence Cessna 150 Its invisible feels like stone wall time Ive come upon sailplane flight Ive wished carried strobe beacons Strobes available operate eight hours two D batteries cost less $100 Theyre used life jackets strobe light model airplane could useful several situations wouldnt have run time could flip via RC warn away larger airplanes Have ever lost sight plane dull gray sky Wouldnt like have able flip switch would start strobe light flashing plane Have ever made tree landing strobe might help find model know strobe might scare off eagle hawk has decided attack airplane best way set up strobe models would specify flash repetition rate different used life jackets emergency vehicles man-carrying aircraft Maybe should send Morse code M modeldashdash could strobe dash-dash pause dash-1ash pausepause dash-dash pause dash-dash etc Id like see AMA take lead specifying flash rate models right now before anyone spends money developing equipment Another possibility radar transponder radar transponder ON THE GROUND per flying site would sufficient airliners radar shows blip transponder flying site pilot will know should stay one-half mile away Practically airliners have radar altitude-reporting radar transponders nothing has invented forget transponder leave turned no flying nobody will hurt Thats enough theorizing month Does anyone care about stuff Abbreviations used article $ ar United States America currency AK al code state Alaska AMA emy Model Aeronautics amp re electrical current EPROM trically Programmable Read-Only Memory ees Fahrenheit temperature FAA ral Aviation Authority Fax imile transmission pictures FCC ral Communications Commission GMM ials Lat/Lon tude longitude h units location MAPT l AirPorT term flying site mAh iampere hours gy stored battery mph s per hour velocity Ni-Cd ical symbol nickel cadmium batteries NY al code state New York RC o Controlled RV eational Vehicle SC/C t Charger Cycler manufacturersSRname tele phone number VDC s Direct Current Volt electrical pressure 4Make itlMecklenburg Continued page 41 mold-mounting technique essential constructing 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