George M Myers Radio Thchnique part pit area September 89 KRC Eiectric Fiy heid suburban Phiiadei phia PA area shows some highly developed Electric RC airplanes built Dr Keith Shaw Ann Arbor Ml Waco biplane flew complete air show routine including smoke trail Gee Bee fast maneuverable deHaviiiand Comet G-ACSP featured two electric motors retractable landing gear four-motor flying wing looped roiled impressively Dr Shaw has well earned reputation Electric expert ABSTRACT CaRa Trickle Charger Electricpower batteries BY WAY review four types bat tery chargers nickel-cadmium batteries Fast recharges hour less Quick three six hours Overnight 10 15 hours Trickle forever Caring Ni-Cd batteries Part 4Trickle chargers type charger has its own pur pose Trickle chargers keep charged battery ready immediate use No memory will de velop result using trickle charger Batteries left idle will slowly discharge selves Since electrical charge held chem ical imbalance since chemical activity function temperature warmer storage Thddv temperature quicker self-discharge Con versely storage low temperature retards chemical activity causes self-discharge Selfdischarge room temperature takes place rates C/SO C/100 C d cell capacityeg 800 mAh Another way say fully charged battery will discharge itself completely 50 100 days room temperature 75 0F Trickle chargers designed keep steady current about C/SO milliamps flowing battery sufficient make up selfdischarge Obviously charger puts Out just enough current make up losses can never re store lost charge So trickle charger can support element some other kind charger Equally obvious fact trickle charger must sized cell maintained charger puts out 40 mA typ ical plug-it-into-the-wall chargers sold RC systems may serve trickle charger 1 200-mAh battery overnight charger 500-mAh battery quick charg er 250-mAh battery fast charger 50-mAh battery So heres experience CaRa Trickler Before leaving Alaska trip spent about two weeks making adapter plugs organizing trickle-charge setup charging testing Ni-Cd packs old new would leaving home connected Trickler Now six months later similar pe riod modelers typical winter storage RC system am process doing dis charge tests packs Based test results Trickler has maintained packs approximately 95% charge level attached What can ask Charge Retained After Six Months CaRa Trickier Pack No Before After Retained Ident Cells mAh mAb %Remarks 550-14540517963 years old lit tIe use 550-2850047194New 4/ 30/89 38 Model Aviation CaRa Trickier L subject author George M Myers column month Unit displayed charging cords transmitter receiver Trickier capable handling up 32 battery packs time just loafing along maintaining four trans mitter four receiver packs shown right Charge cords contain limiting resistor matched size pack con nected green LED glows show current flowing Cords ordered separately Batteries up 104000 mAh can serviced 900-1 8948936995 years old little use 1200-1 490085595Used 8 years 75% ca pacity Average charge retained 96% same time 550-mAh pack tested 537 mAh 4/28/89 left Unat tended workbench same six months tested 275 mAh after first re charge recovered 400 mAh after three cy cles 540 mAh after six cycles capacity tests performed CaRa Products RC System Automatic Cycler Charger described last month Cycler tool can powered 110 VAC 12 VDC both cables provided will discharge pack capture capacity milliamp-hours digital display automatically switch first quick charging trickle charging full charge attained Two outlets back cycler provide additional trickle charging up four transmitters four flight-pack batteries CaRa Trickier delivered four RCAtype sockets specify order charge cords separately Standard cords 500-mAh trans mitter batteries receiver battery capaci ties follows Lo 100-mAb Normal 500 mAh Hi 1200 mAb Optional cords available have built accommo date batteries capacities up 4000 mAb charge cord about five feet long con tains two pairs wires maintain two batteries starts RCA plug pair wires has limiting resistor particular batterypack capacity green LED glows charging current flowing wire pairs termi nate cut ends add whatever plugs match equipment get special plugs needed cut off charger came RC system splic ing back Deans plugs Therefore can use RC systems charger usual way whenever necessary Because CaRa Trickier has capacity maintain up 32 packs maximum recom mended size 1800 mAh up 4000 mAh has accommodated special order can double number charging cable assem blies used purchasing RCA phono Y-connec tort local Radio Shack have together makes quite scramble wires keep organized particu larly batteries have various capacities color coded using red tape indicate trans mitter-charging wires yellow tape indi cate flight-battery-charging wires Blue tape indi cates wires low-capacity 150 250 mAb packs white indicates high capacity 1200 mAh Its colorful have keep wits about avoid over- undercharging would ever want get situ ation Well some people have hobby have radio aircraft might have Sailplane two Scale mod el Pattern plane some kind Pylon Racer sport model trainer call Expendable Helicopter two maybe couple boats cars kids etc Now weekend comes weath er good honeydo list has trashed want fly radio own always ready dont have waste time swap ping radios charging just grab Continued page 8S AP AP C PROPELLERS 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 57x3$159 EACH 7x3$159EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH 7x8SI59EACH 7x9SISSEACH 7xlC$159EACH 8s4S179EACH SsS$179EACH 8x6S17SEACH 8x7SI79EACH Boa$179EACH BoB$179EACH BolD$179EACH 9x4sIBBEACH 9x5$199EACH halO$795EACH hixhl$7S5EACH 11o12$795EACH 11x13$795EACH hlxl4$7S5EACH 12x5$795EACH 12o10$795EACH l2ohh$7S5EACH 12x12S7S5EACH 12o13$7SSEACH 12o14$755 EACH llol2W$795EACH l2xlOW$7S5EACH 135 x 12551255 EACH 14o8$12S5EACH 14o14$1295EACH Contact local hobby dealer Manufactured Landing Producta Knights Landing California July 1990 39 0 0 Sport Sizes Competition Sizes ExEsIBBEACH 9x7$1BBEACH SoB$199EACH 9x9$199EACH SolO$l99EACH 95 a 45 29 EACH 10o6S22SEACH lOo7$229EACH ICoB$229EACH lOsS$229EACH lOalO$229EACH 11o6$24SEACH 11o7S249EACH llxB$249EACH haS$249EACH 12x6$28SEACH 12o7$2B9EACH l2xB$28SEACH OT OOL H STAY coos. PERFECT SHADE AT THE FLYING FIELDTHACKOUT CAMPING OR AT THE LAEE OFFICIAL SHADE TEST AT 1987 HATS FOR H/C PATtERN JUDGES SHADE TENT AT 1988 HATS AT H/C PA7-rERR SITES FOR OFFICIALS HEADQUARTERS TESTS AND THANSMIT1ER IMPOUHOS fQ5Ths510ADEESA770RES NOUHY ---- Ho center pole nearlY 7 tail Opaque heat ref leoting canopy 5 Minutes OHiO LIG1tLWEID1IT ---- 6sil Weighs 6 1/2 po.nde _____ z HLaDHESLSTART ---- 6a11 Tested 40 MPH ADJIISTASLE ---- Level tilted side ____________________________PASDASLE ---- Two three nan joined HODELP HE Econney 6n10$3900 S40OUPS Sportsean OHIO$4395$400UPS DIning 9510$5700 $400UPS SportRing 9e18$9350$500UPS Mech Tote-TarP 4e6$ 795 $200UPS Trak-Lok-Eve Kit TAA2$1000 $200UPS Trak-LoR-Ryc Kit TAA3$1450 $200UPS _____________________________ cr~azJSOO42 1-4626 t4MCO fliEJOUR2MLIPA50Y fQRTAaHADandTHAxWEEYEORDERS OHALEOS & DISTRIRUTOR CALLS 209 SW aocv AVE kite gee withrrag literatore availableBARTLESVILLEOK 74003 H/Vs have canopy trackon 414 Coepany products PH 918-336-9445 GP Marine WildCat Almost Ready Race electric twin knows make fast moves Designed power tremendous maneuverability WildCat will astonish well handles top speed Two powerful Thruatmaster 550 motors custom high-pitch props dual rudders trim tabs enable WildCat sweep through such tight maneuvers l80 turns 4 diameter circleat full throttle can enjoy its responsive action almost immediately WildCats advanced ARR design streamlined ABS hull comes joined deck motors stainless steel drive shafts already installed 2-channel Using photo-illustrated instructions can racing WildCat just few hours Nothing handles like WildCat Pilot stylish twin flaming decals picklefork bow through sharpest course WildCat will dime See hobby dealer write us today Jim said mix small amount water put empty accelerator bottle spray bottle fine spray Charlie reminds us shake container vigorously before use Arizona modeler Doug Huntley enclosed clip ping unidentified source suggests using nasal aspirator blow dry baking soda onto CyA glue joint speed curing pro cess According clipping nasal aspirators babies can obtained variety store about $150 Last letter Harold Melson also uses baking soda cautioned fresh CyA fresh baking soda can boil contact other So dont get body parts Har old also stated baking soda works best thin CyA does respectable job thick varieties expect Ill get letters subject column already overdue editor anyone suggests application method different above Ill include next column fingers prop letter Manuel Ornelas treasurer East Bay Radio Control lers should noted operate Enya four-stroke engines Manuel wrote Without doubt Enya engines some better ones developed RC However fourstroke ones have drawback Due loca tion ol glow plug members almost lost tip index finger After starting engine went pull plug connector plug accidentally put index finger through prop didnt realize what hap pened until blood started running down hand After close examination found about inch index finger about fall off helper determined didnt apply tourniquet right away head hospital might bleed death nasty cut Five stitches two hours later re turned field pick up gear plane Everyone field moaned groaned about engine location plug ought law against such design unfamiliar Enya four-stoke question glow plug located ward side cylinder head angled toward prop arc dont know Id sub scribe suggestion should law against such design however would strongly recommend use remote-type glow plug connector Manuels letter suggested manufacturer might want consider including engine Radio Technique/Myers Continued page 39 what want go can take care small fleet Auto matic Cycler-Charger will simultaneously trickle charge three transmitters five receiver packs makes snarl wires too original purpose Trickler re lease Automatic Cycler-Charger field use think man has Automatic Cycler Charger will buy TrickIer simplify life Compendium Trickler @ $3495 cables $5 CaRa Products Canton SD 57013 tel 1-605-987-5924 neat device available Ace R/C Inc add charger came RC system Its called Add-A-Trickle inex pensive doesnt add significantly wire jungle could buy see ben efits trickle charging cold winter winds blow outside sit testing batteries learning buddy Bob Aberle decided build tiny electric-powered model didnt fly very well took plane home tests few min utes answer him Don Srull Hi Line Ltd PO Box 341283 Bethesda MD 20827 took issue answer led battery testing have known long time capacity battery depends discharge rate since never got electric-powered-air plane movement developmental way done serious testing Electric-power bat teries situation Bobs plane presented itself way batteries using run motor rated 450 mAb dis charged 225-mA rate showed 450-mAb ca pacity discharged 900 mA battery packs contained three cells put two packs series test sixcell pack Charge-A-Matic see May 90 column details Aristo-Craft unit did easily Charge-A-Matic allows program various discharge currents up maximum 36 amps Bobs packs also showed full capacity 36 amps thought packs OK Don Srull thought bad airplanes motor draws approximately 10 amps 30 volts So set up another test using three one-ohm 10-watt power resistors Ra dio Shack parallel draw about 10 amps indicated battery capacity cut half FurtherContinued page 110 July 1990 85 Divinjo, 01 Ureat VIans Model Mfg Co PO Box 755 Urbana IL SISOI 2173672069 ~TM fODnDSTBISUIO C0tp1 HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP
Edition: Model Aviation - 1990/07
Page Numbers: 38, 39, 85, 110
George M Myers Radio Thchnique part pit area September 89 KRC Eiectric Fiy heid suburban Phiiadei phia PA area shows some highly developed Electric RC airplanes built Dr Keith Shaw Ann Arbor Ml Waco biplane flew complete air show routine including smoke trail Gee Bee fast maneuverable deHaviiiand Comet G-ACSP featured two electric motors retractable landing gear four-motor flying wing looped roiled impressively Dr Shaw has well earned reputation Electric expert ABSTRACT CaRa Trickle Charger Electricpower batteries BY WAY review four types bat tery chargers nickel-cadmium batteries Fast recharges hour less Quick three six hours Overnight 10 15 hours Trickle forever Caring Ni-Cd batteries Part 4Trickle chargers type charger has its own pur pose Trickle chargers keep charged battery ready immediate use No memory will de velop result using trickle charger Batteries left idle will slowly discharge selves Since electrical charge held chem ical imbalance since chemical activity function temperature warmer storage Thddv temperature quicker self-discharge Con versely storage low temperature retards chemical activity causes self-discharge Selfdischarge room temperature takes place rates C/SO C/100 C d cell capacityeg 800 mAh Another way say fully charged battery will discharge itself completely 50 100 days room temperature 75 0F Trickle chargers designed keep steady current about C/SO milliamps flowing battery sufficient make up selfdischarge Obviously charger puts Out just enough current make up losses can never re store lost charge So trickle charger can support element some other kind charger Equally obvious fact trickle charger must sized cell maintained charger puts out 40 mA typ ical plug-it-into-the-wall chargers sold RC systems may serve trickle charger 1 200-mAh battery overnight charger 500-mAh battery quick charg er 250-mAh battery fast charger 50-mAh battery So heres experience CaRa Trickler Before leaving Alaska trip spent about two weeks making adapter plugs organizing trickle-charge setup charging testing Ni-Cd packs old new would leaving home connected Trickler Now six months later similar pe riod modelers typical winter storage RC system am process doing dis charge tests packs Based test results Trickler has maintained packs approximately 95% charge level attached What can ask Charge Retained After Six Months CaRa Trickier Pack No Before After Retained Ident Cells mAh mAb %Remarks 550-14540517963 years old lit tIe use 550-2850047194New 4/ 30/89 38 Model Aviation CaRa Trickier L subject author George M Myers column month Unit displayed charging cords transmitter receiver Trickier capable handling up 32 battery packs time just loafing along maintaining four trans mitter four receiver packs shown right Charge cords contain limiting resistor matched size pack con nected green LED glows show current flowing Cords ordered separately Batteries up 104000 mAh can serviced 900-1 8948936995 years old little use 1200-1 490085595Used 8 years 75% ca pacity Average charge retained 96% same time 550-mAh pack tested 537 mAh 4/28/89 left Unat tended workbench same six months tested 275 mAh after first re charge recovered 400 mAh after three cy cles 540 mAh after six cycles capacity tests performed CaRa Products RC System Automatic Cycler Charger described last month Cycler tool can powered 110 VAC 12 VDC both cables provided will discharge pack capture capacity milliamp-hours digital display automatically switch first quick charging trickle charging full charge attained Two outlets back cycler provide additional trickle charging up four transmitters four flight-pack batteries CaRa Trickier delivered four RCAtype sockets specify order charge cords separately Standard cords 500-mAh trans mitter batteries receiver battery capaci ties follows Lo 100-mAb Normal 500 mAh Hi 1200 mAb Optional cords available have built accommo date batteries capacities up 4000 mAb charge cord about five feet long con tains two pairs wires maintain two batteries starts RCA plug pair wires has limiting resistor particular batterypack capacity green LED glows charging current flowing wire pairs termi nate cut ends add whatever plugs match equipment get special plugs needed cut off charger came RC system splic ing back Deans plugs Therefore can use RC systems charger usual way whenever necessary Because CaRa Trickier has capacity maintain up 32 packs maximum recom mended size 1800 mAh up 4000 mAh has accommodated special order can double number charging cable assem blies used purchasing RCA phono Y-connec tort local Radio Shack have together makes quite scramble wires keep organized particu larly batteries have various capacities color coded using red tape indicate trans mitter-charging wires yellow tape indi cate flight-battery-charging wires Blue tape indi cates wires low-capacity 150 250 mAb packs white indicates high capacity 1200 mAh Its colorful have keep wits about avoid over- undercharging would ever want get situ ation Well some people have hobby have radio aircraft might have Sailplane two Scale mod el Pattern plane some kind Pylon Racer sport model trainer call Expendable Helicopter two maybe couple boats cars kids etc Now weekend comes weath er good honeydo list has trashed want fly radio own always ready dont have waste time swap ping radios charging just grab Continued page 8S AP AP C PROPELLERS 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 57x3$159 EACH 7x3$159EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH 7x8SI59EACH 7x9SISSEACH 7xlC$159EACH 8s4S179EACH SsS$179EACH 8x6S17SEACH 8x7SI79EACH Boa$179EACH BoB$179EACH BolD$179EACH 9x4sIBBEACH 9x5$199EACH halO$795EACH hixhl$7S5EACH 11o12$795EACH 11x13$795EACH hlxl4$7S5EACH 12x5$795EACH 12o10$795EACH l2ohh$7S5EACH 12x12S7S5EACH 12o13$7SSEACH 12o14$755 EACH llol2W$795EACH l2xlOW$7S5EACH 135 x 12551255 EACH 14o8$12S5EACH 14o14$1295EACH Contact local hobby dealer Manufactured Landing Producta Knights Landing California July 1990 39 0 0 Sport Sizes Competition Sizes ExEsIBBEACH 9x7$1BBEACH SoB$199EACH 9x9$199EACH SolO$l99EACH 95 a 45 29 EACH 10o6S22SEACH lOo7$229EACH ICoB$229EACH lOsS$229EACH lOalO$229EACH 11o6$24SEACH 11o7S249EACH llxB$249EACH haS$249EACH 12x6$28SEACH 12o7$2B9EACH l2xB$28SEACH OT OOL H STAY coos. PERFECT SHADE AT THE FLYING FIELDTHACKOUT CAMPING OR AT THE LAEE OFFICIAL SHADE TEST AT 1987 HATS FOR H/C PATtERN JUDGES SHADE TENT AT 1988 HATS AT H/C PA7-rERR SITES FOR OFFICIALS HEADQUARTERS TESTS AND THANSMIT1ER IMPOUHOS fQ5Ths510ADEESA770RES NOUHY ---- Ho center pole nearlY 7 tail Opaque heat ref leoting canopy 5 Minutes OHiO LIG1tLWEID1IT ---- 6sil Weighs 6 1/2 po.nde _____ z HLaDHESLSTART ---- 6a11 Tested 40 MPH ADJIISTASLE ---- Level tilted side ____________________________PASDASLE ---- Two three nan joined HODELP HE Econney 6n10$3900 S40OUPS Sportsean OHIO$4395$400UPS DIning 9510$5700 $400UPS SportRing 9e18$9350$500UPS Mech Tote-TarP 4e6$ 795 $200UPS Trak-Lok-Eve Kit TAA2$1000 $200UPS Trak-LoR-Ryc Kit TAA3$1450 $200UPS _____________________________ cr~azJSOO42 1-4626 t4MCO fliEJOUR2MLIPA50Y fQRTAaHADandTHAxWEEYEORDERS OHALEOS & DISTRIRUTOR CALLS 209 SW aocv AVE kite gee withrrag literatore availableBARTLESVILLEOK 74003 H/Vs have canopy trackon 414 Coepany products PH 918-336-9445 GP Marine WildCat Almost Ready Race electric twin knows make fast moves Designed power tremendous maneuverability WildCat will astonish well handles top speed Two powerful Thruatmaster 550 motors custom high-pitch props dual rudders trim tabs enable WildCat sweep through such tight maneuvers l80 turns 4 diameter circleat full throttle can enjoy its responsive action almost immediately WildCats advanced ARR design streamlined ABS hull comes joined deck motors stainless steel drive shafts already installed 2-channel Using photo-illustrated instructions can racing WildCat just few hours Nothing handles like WildCat Pilot stylish twin flaming decals picklefork bow through sharpest course WildCat will dime See hobby dealer write us today Jim said mix small amount water put empty accelerator bottle spray bottle fine spray Charlie reminds us shake container vigorously before use Arizona modeler Doug Huntley enclosed clip ping unidentified source suggests using nasal aspirator blow dry baking soda onto CyA glue joint speed curing pro cess According clipping nasal aspirators babies can obtained variety store about $150 Last letter Harold Melson also uses baking soda cautioned fresh CyA fresh baking soda can boil contact other So dont get body parts Har old also stated baking soda works best thin CyA does respectable job thick varieties expect Ill get letters subject column already overdue editor anyone suggests application method different above Ill include next column fingers prop letter Manuel Ornelas treasurer East Bay Radio Control lers should noted operate Enya four-stroke engines Manuel wrote Without doubt Enya engines some better ones developed RC However fourstroke ones have drawback Due loca tion ol glow plug members almost lost tip index finger After starting engine went pull plug connector plug accidentally put index finger through prop didnt realize what hap pened until blood started running down hand After close examination found about inch index finger about fall off helper determined didnt apply tourniquet right away head hospital might bleed death nasty cut Five stitches two hours later re turned field pick up gear plane Everyone field moaned groaned about engine location plug ought law against such design unfamiliar Enya four-stoke question glow plug located ward side cylinder head angled toward prop arc dont know Id sub scribe suggestion should law against such design however would strongly recommend use remote-type glow plug connector Manuels letter suggested manufacturer might want consider including engine Radio Technique/Myers Continued page 39 what want go can take care small fleet Auto matic Cycler-Charger will simultaneously trickle charge three transmitters five receiver packs makes snarl wires too original purpose Trickler re lease Automatic Cycler-Charger field use think man has Automatic Cycler Charger will buy TrickIer simplify life Compendium Trickler @ $3495 cables $5 CaRa Products Canton SD 57013 tel 1-605-987-5924 neat device available Ace R/C Inc add charger came RC system Its called Add-A-Trickle inex pensive doesnt add significantly wire jungle could buy see ben efits trickle charging cold winter winds blow outside sit testing batteries learning buddy Bob Aberle decided build tiny electric-powered model didnt fly very well took plane home tests few min utes answer him Don Srull Hi Line Ltd PO Box 341283 Bethesda MD 20827 took issue answer led battery testing have known long time capacity battery depends discharge rate since never got electric-powered-air plane movement developmental way done serious testing Electric-power bat teries situation Bobs plane presented itself way batteries using run motor rated 450 mAb dis charged 225-mA rate showed 450-mAb ca pacity discharged 900 mA battery packs contained three cells put two packs series test sixcell pack Charge-A-Matic see May 90 column details Aristo-Craft unit did easily Charge-A-Matic allows program various discharge currents up maximum 36 amps Bobs packs also showed full capacity 36 amps thought packs OK Don Srull thought bad airplanes motor draws approximately 10 amps 30 volts So set up another test using three one-ohm 10-watt power resistors Ra dio Shack parallel draw about 10 amps indicated battery capacity cut half FurtherContinued page 110 July 1990 85 Divinjo, 01 Ureat VIans Model Mfg Co PO Box 755 Urbana IL SISOI 2173672069 ~TM fODnDSTBISUIO C0tp1 HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP
Edition: Model Aviation - 1990/07
Page Numbers: 38, 39, 85, 110
George M Myers Radio Thchnique part pit area September 89 KRC Eiectric Fiy heid suburban Phiiadei phia PA area shows some highly developed Electric RC airplanes built Dr Keith Shaw Ann Arbor Ml Waco biplane flew complete air show routine including smoke trail Gee Bee fast maneuverable deHaviiiand Comet G-ACSP featured two electric motors retractable landing gear four-motor flying wing looped roiled impressively Dr Shaw has well earned reputation Electric expert ABSTRACT CaRa Trickle Charger Electricpower batteries BY WAY review four types bat tery chargers nickel-cadmium batteries Fast recharges hour less Quick three six hours Overnight 10 15 hours Trickle forever Caring Ni-Cd batteries Part 4Trickle chargers type charger has its own pur pose Trickle chargers keep charged battery ready immediate use No memory will de velop result using trickle charger Batteries left idle will slowly discharge selves Since electrical charge held chem ical imbalance since chemical activity function temperature warmer storage Thddv temperature quicker self-discharge Con versely storage low temperature retards chemical activity causes self-discharge Selfdischarge room temperature takes place rates C/SO C/100 C d cell capacityeg 800 mAh Another way say fully charged battery will discharge itself completely 50 100 days room temperature 75 0F Trickle chargers designed keep steady current about C/SO milliamps flowing battery sufficient make up selfdischarge Obviously charger puts Out just enough current make up losses can never re store lost charge So trickle charger can support element some other kind charger Equally obvious fact trickle charger must sized cell maintained charger puts out 40 mA typ ical plug-it-into-the-wall chargers sold RC systems may serve trickle charger 1 200-mAh battery overnight charger 500-mAh battery quick charg er 250-mAh battery fast charger 50-mAh battery So heres experience CaRa Trickler Before leaving Alaska trip spent about two weeks making adapter plugs organizing trickle-charge setup charging testing Ni-Cd packs old new would leaving home connected Trickler Now six months later similar pe riod modelers typical winter storage RC system am process doing dis charge tests packs Based test results Trickler has maintained packs approximately 95% charge level attached What can ask Charge Retained After Six Months CaRa Trickier Pack No Before After Retained Ident Cells mAh mAb %Remarks 550-14540517963 years old lit tIe use 550-2850047194New 4/ 30/89 38 Model Aviation CaRa Trickier L subject author George M Myers column month Unit displayed charging cords transmitter receiver Trickier capable handling up 32 battery packs time just loafing along maintaining four trans mitter four receiver packs shown right Charge cords contain limiting resistor matched size pack con nected green LED glows show current flowing Cords ordered separately Batteries up 104000 mAh can serviced 900-1 8948936995 years old little use 1200-1 490085595Used 8 years 75% ca pacity Average charge retained 96% same time 550-mAh pack tested 537 mAh 4/28/89 left Unat tended workbench same six months tested 275 mAh after first re charge recovered 400 mAh after three cy cles 540 mAh after six cycles capacity tests performed CaRa Products RC System Automatic Cycler Charger described last month Cycler tool can powered 110 VAC 12 VDC both cables provided will discharge pack capture capacity milliamp-hours digital display automatically switch first quick charging trickle charging full charge attained Two outlets back cycler provide additional trickle charging up four transmitters four flight-pack batteries CaRa Trickier delivered four RCAtype sockets specify order charge cords separately Standard cords 500-mAh trans mitter batteries receiver battery capaci ties follows Lo 100-mAb Normal 500 mAh Hi 1200 mAb Optional cords available have built accommo date batteries capacities up 4000 mAb charge cord about five feet long con tains two pairs wires maintain two batteries starts RCA plug pair wires has limiting resistor particular batterypack capacity green LED glows charging current flowing wire pairs termi nate cut ends add whatever plugs match equipment get special plugs needed cut off charger came RC system splic ing back Deans plugs Therefore can use RC systems charger usual way whenever necessary Because CaRa Trickier has capacity maintain up 32 packs maximum recom mended size 1800 mAh up 4000 mAh has accommodated special order can double number charging cable assem blies used purchasing RCA phono Y-connec tort local Radio Shack have together makes quite scramble wires keep organized particu larly batteries have various capacities color coded using red tape indicate trans mitter-charging wires yellow tape indi cate flight-battery-charging wires Blue tape indi cates wires low-capacity 150 250 mAb packs white indicates high capacity 1200 mAh Its colorful have keep wits about avoid over- undercharging would ever want get situ ation Well some people have hobby have radio aircraft might have Sailplane two Scale mod el Pattern plane some kind Pylon Racer sport model trainer call Expendable Helicopter two maybe couple boats cars kids etc Now weekend comes weath er good honeydo list has trashed want fly radio own always ready dont have waste time swap ping radios charging just grab Continued page 8S AP AP C PROPELLERS 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 57x3$159 EACH 7x3$159EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH 7x8SI59EACH 7x9SISSEACH 7xlC$159EACH 8s4S179EACH SsS$179EACH 8x6S17SEACH 8x7SI79EACH Boa$179EACH BoB$179EACH BolD$179EACH 9x4sIBBEACH 9x5$199EACH halO$795EACH hixhl$7S5EACH 11o12$795EACH 11x13$795EACH hlxl4$7S5EACH 12x5$795EACH 12o10$795EACH l2ohh$7S5EACH 12x12S7S5EACH 12o13$7SSEACH 12o14$755 EACH llol2W$795EACH l2xlOW$7S5EACH 135 x 12551255 EACH 14o8$12S5EACH 14o14$1295EACH Contact local hobby dealer Manufactured Landing Producta Knights Landing California July 1990 39 0 0 Sport Sizes Competition Sizes ExEsIBBEACH 9x7$1BBEACH SoB$199EACH 9x9$199EACH SolO$l99EACH 95 a 45 29 EACH 10o6S22SEACH lOo7$229EACH ICoB$229EACH lOsS$229EACH lOalO$229EACH 11o6$24SEACH 11o7S249EACH llxB$249EACH haS$249EACH 12x6$28SEACH 12o7$2B9EACH l2xB$28SEACH OT OOL H STAY coos. PERFECT SHADE AT THE FLYING FIELDTHACKOUT CAMPING OR AT THE LAEE OFFICIAL SHADE TEST AT 1987 HATS FOR H/C PATtERN JUDGES SHADE TENT AT 1988 HATS AT H/C PA7-rERR SITES FOR OFFICIALS HEADQUARTERS TESTS AND THANSMIT1ER IMPOUHOS fQ5Ths510ADEESA770RES NOUHY ---- Ho center pole nearlY 7 tail Opaque heat ref leoting canopy 5 Minutes OHiO LIG1tLWEID1IT ---- 6sil Weighs 6 1/2 po.nde _____ z HLaDHESLSTART ---- 6a11 Tested 40 MPH ADJIISTASLE ---- Level tilted side ____________________________PASDASLE ---- Two three nan joined HODELP HE Econney 6n10$3900 S40OUPS Sportsean OHIO$4395$400UPS DIning 9510$5700 $400UPS SportRing 9e18$9350$500UPS Mech Tote-TarP 4e6$ 795 $200UPS Trak-Lok-Eve Kit TAA2$1000 $200UPS Trak-LoR-Ryc Kit TAA3$1450 $200UPS _____________________________ cr~azJSOO42 1-4626 t4MCO fliEJOUR2MLIPA50Y fQRTAaHADandTHAxWEEYEORDERS OHALEOS & DISTRIRUTOR CALLS 209 SW aocv AVE kite gee withrrag literatore availableBARTLESVILLEOK 74003 H/Vs have canopy trackon 414 Coepany products PH 918-336-9445 GP Marine WildCat Almost Ready Race electric twin knows make fast moves Designed power tremendous maneuverability WildCat will astonish well handles top speed Two powerful Thruatmaster 550 motors custom high-pitch props dual rudders trim tabs enable WildCat sweep through such tight maneuvers l80 turns 4 diameter circleat full throttle can enjoy its responsive action almost immediately WildCats advanced ARR design streamlined ABS hull comes joined deck motors stainless steel drive shafts already installed 2-channel Using photo-illustrated instructions can racing WildCat just few hours Nothing handles like WildCat Pilot stylish twin flaming decals picklefork bow through sharpest course WildCat will dime See hobby dealer write us today Jim said mix small amount water put empty accelerator bottle spray bottle fine spray Charlie reminds us shake container vigorously before use Arizona modeler Doug Huntley enclosed clip ping unidentified source suggests using nasal aspirator blow dry baking soda onto CyA glue joint speed curing pro cess According clipping nasal aspirators babies can obtained variety store about $150 Last letter Harold Melson also uses baking soda cautioned fresh CyA fresh baking soda can boil contact other So dont get body parts Har old also stated baking soda works best thin CyA does respectable job thick varieties expect Ill get letters subject column already overdue editor anyone suggests application method different above Ill include next column fingers prop letter Manuel Ornelas treasurer East Bay Radio Control lers should noted operate Enya four-stroke engines Manuel wrote Without doubt Enya engines some better ones developed RC However fourstroke ones have drawback Due loca tion ol glow plug members almost lost tip index finger After starting engine went pull plug connector plug accidentally put index finger through prop didnt realize what hap pened until blood started running down hand After close examination found about inch index finger about fall off helper determined didnt apply tourniquet right away head hospital might bleed death nasty cut Five stitches two hours later re turned field pick up gear plane Everyone field moaned groaned about engine location plug ought law against such design unfamiliar Enya four-stoke question glow plug located ward side cylinder head angled toward prop arc dont know Id sub scribe suggestion should law against such design however would strongly recommend use remote-type glow plug connector Manuels letter suggested manufacturer might want consider including engine Radio Technique/Myers Continued page 39 what want go can take care small fleet Auto matic Cycler-Charger will simultaneously trickle charge three transmitters five receiver packs makes snarl wires too original purpose Trickler re lease Automatic Cycler-Charger field use think man has Automatic Cycler Charger will buy TrickIer simplify life Compendium Trickler @ $3495 cables $5 CaRa Products Canton SD 57013 tel 1-605-987-5924 neat device available Ace R/C Inc add charger came RC system Its called Add-A-Trickle inex pensive doesnt add significantly wire jungle could buy see ben efits trickle charging cold winter winds blow outside sit testing batteries learning buddy Bob Aberle decided build tiny electric-powered model didnt fly very well took plane home tests few min utes answer him Don Srull Hi Line Ltd PO Box 341283 Bethesda MD 20827 took issue answer led battery testing have known long time capacity battery depends discharge rate since never got electric-powered-air plane movement developmental way done serious testing Electric-power bat teries situation Bobs plane presented itself way batteries using run motor rated 450 mAb dis charged 225-mA rate showed 450-mAb ca pacity discharged 900 mA battery packs contained three cells put two packs series test sixcell pack Charge-A-Matic see May 90 column details Aristo-Craft unit did easily Charge-A-Matic allows program various discharge currents up maximum 36 amps Bobs packs also showed full capacity 36 amps thought packs OK Don Srull thought bad airplanes motor draws approximately 10 amps 30 volts So set up another test using three one-ohm 10-watt power resistors Ra dio Shack parallel draw about 10 amps indicated battery capacity cut half FurtherContinued page 110 July 1990 85 Divinjo, 01 Ureat VIans Model Mfg Co PO Box 755 Urbana IL SISOI 2173672069 ~TM fODnDSTBISUIO C0tp1 HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP
Edition: Model Aviation - 1990/07
Page Numbers: 38, 39, 85, 110
George M Myers Radio Thchnique part pit area September 89 KRC Eiectric Fiy heid suburban Phiiadei phia PA area shows some highly developed Electric RC airplanes built Dr Keith Shaw Ann Arbor Ml Waco biplane flew complete air show routine including smoke trail Gee Bee fast maneuverable deHaviiiand Comet G-ACSP featured two electric motors retractable landing gear four-motor flying wing looped roiled impressively Dr Shaw has well earned reputation Electric expert ABSTRACT CaRa Trickle Charger Electricpower batteries BY WAY review four types bat tery chargers nickel-cadmium batteries Fast recharges hour less Quick three six hours Overnight 10 15 hours Trickle forever Caring Ni-Cd batteries Part 4Trickle chargers type charger has its own pur pose Trickle chargers keep charged battery ready immediate use No memory will de velop result using trickle charger Batteries left idle will slowly discharge selves Since electrical charge held chem ical imbalance since chemical activity function temperature warmer storage Thddv temperature quicker self-discharge Con versely storage low temperature retards chemical activity causes self-discharge Selfdischarge room temperature takes place rates C/SO C/100 C d cell capacityeg 800 mAh Another way say fully charged battery will discharge itself completely 50 100 days room temperature 75 0F Trickle chargers designed keep steady current about C/SO milliamps flowing battery sufficient make up selfdischarge Obviously charger puts Out just enough current make up losses can never re store lost charge So trickle charger can support element some other kind charger Equally obvious fact trickle charger must sized cell maintained charger puts out 40 mA typ ical plug-it-into-the-wall chargers sold RC systems may serve trickle charger 1 200-mAh battery overnight charger 500-mAh battery quick charg er 250-mAh battery fast charger 50-mAh battery So heres experience CaRa Trickler Before leaving Alaska trip spent about two weeks making adapter plugs organizing trickle-charge setup charging testing Ni-Cd packs old new would leaving home connected Trickler Now six months later similar pe riod modelers typical winter storage RC system am process doing dis charge tests packs Based test results Trickler has maintained packs approximately 95% charge level attached What can ask Charge Retained After Six Months CaRa Trickier Pack No Before After Retained Ident Cells mAh mAb %Remarks 550-14540517963 years old lit tIe use 550-2850047194New 4/ 30/89 38 Model Aviation CaRa Trickier L subject author George M Myers column month Unit displayed charging cords transmitter receiver Trickier capable handling up 32 battery packs time just loafing along maintaining four trans mitter four receiver packs shown right Charge cords contain limiting resistor matched size pack con nected green LED glows show current flowing Cords ordered separately Batteries up 104000 mAh can serviced 900-1 8948936995 years old little use 1200-1 490085595Used 8 years 75% ca pacity Average charge retained 96% same time 550-mAh pack tested 537 mAh 4/28/89 left Unat tended workbench same six months tested 275 mAh after first re charge recovered 400 mAh after three cy cles 540 mAh after six cycles capacity tests performed CaRa Products RC System Automatic Cycler Charger described last month Cycler tool can powered 110 VAC 12 VDC both cables provided will discharge pack capture capacity milliamp-hours digital display automatically switch first quick charging trickle charging full charge attained Two outlets back cycler provide additional trickle charging up four transmitters four flight-pack batteries CaRa Trickier delivered four RCAtype sockets specify order charge cords separately Standard cords 500-mAh trans mitter batteries receiver battery capaci ties follows Lo 100-mAb Normal 500 mAh Hi 1200 mAb Optional cords available have built accommo date batteries capacities up 4000 mAb charge cord about five feet long con tains two pairs wires maintain two batteries starts RCA plug pair wires has limiting resistor particular batterypack capacity green LED glows charging current flowing wire pairs termi nate cut ends add whatever plugs match equipment get special plugs needed cut off charger came RC system splic ing back Deans plugs Therefore can use RC systems charger usual way whenever necessary Because CaRa Trickier has capacity maintain up 32 packs maximum recom mended size 1800 mAh up 4000 mAh has accommodated special order can double number charging cable assem blies used purchasing RCA phono Y-connec tort local Radio Shack have together makes quite scramble wires keep organized particu larly batteries have various capacities color coded using red tape indicate trans mitter-charging wires yellow tape indi cate flight-battery-charging wires Blue tape indi cates wires low-capacity 150 250 mAb packs white indicates high capacity 1200 mAh Its colorful have keep wits about avoid over- undercharging would ever want get situ ation Well some people have hobby have radio aircraft might have Sailplane two Scale mod el Pattern plane some kind Pylon Racer sport model trainer call Expendable Helicopter two maybe couple boats cars kids etc Now weekend comes weath er good honeydo list has trashed want fly radio own always ready dont have waste time swap ping radios charging just grab Continued page 8S AP AP C PROPELLERS 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 57x3$159 EACH 7x3$159EACH 7x4$159EACH 7x5$159EACH 7x6$159EACH 7x7$159EACH 7x8SI59EACH 7x9SISSEACH 7xlC$159EACH 8s4S179EACH SsS$179EACH 8x6S17SEACH 8x7SI79EACH Boa$179EACH BoB$179EACH BolD$179EACH 9x4sIBBEACH 9x5$199EACH halO$795EACH hixhl$7S5EACH 11o12$795EACH 11x13$795EACH hlxl4$7S5EACH 12x5$795EACH 12o10$795EACH l2ohh$7S5EACH 12x12S7S5EACH 12o13$7SSEACH 12o14$755 EACH llol2W$795EACH l2xlOW$7S5EACH 135 x 12551255 EACH 14o8$12S5EACH 14o14$1295EACH Contact local hobby dealer Manufactured Landing Producta Knights Landing California July 1990 39 0 0 Sport Sizes Competition Sizes ExEsIBBEACH 9x7$1BBEACH SoB$199EACH 9x9$199EACH SolO$l99EACH 95 a 45 29 EACH 10o6S22SEACH lOo7$229EACH ICoB$229EACH lOsS$229EACH lOalO$229EACH 11o6$24SEACH 11o7S249EACH llxB$249EACH haS$249EACH 12x6$28SEACH 12o7$2B9EACH l2xB$28SEACH OT OOL H STAY coos. PERFECT SHADE AT THE FLYING FIELDTHACKOUT CAMPING OR AT THE LAEE OFFICIAL SHADE TEST AT 1987 HATS FOR H/C PATtERN JUDGES SHADE TENT AT 1988 HATS AT H/C PA7-rERR SITES FOR OFFICIALS HEADQUARTERS TESTS AND THANSMIT1ER IMPOUHOS fQ5Ths510ADEESA770RES NOUHY ---- Ho center pole nearlY 7 tail Opaque heat ref leoting canopy 5 Minutes OHiO LIG1tLWEID1IT ---- 6sil Weighs 6 1/2 po.nde _____ z HLaDHESLSTART ---- 6a11 Tested 40 MPH ADJIISTASLE ---- Level tilted side ____________________________PASDASLE ---- Two three nan joined HODELP HE Econney 6n10$3900 S40OUPS Sportsean OHIO$4395$400UPS DIning 9510$5700 $400UPS SportRing 9e18$9350$500UPS Mech Tote-TarP 4e6$ 795 $200UPS Trak-Lok-Eve Kit TAA2$1000 $200UPS Trak-LoR-Ryc Kit TAA3$1450 $200UPS _____________________________ cr~azJSOO42 1-4626 t4MCO fliEJOUR2MLIPA50Y fQRTAaHADandTHAxWEEYEORDERS OHALEOS & DISTRIRUTOR CALLS 209 SW aocv AVE kite gee withrrag literatore availableBARTLESVILLEOK 74003 H/Vs have canopy trackon 414 Coepany products PH 918-336-9445 GP Marine WildCat Almost Ready Race electric twin knows make fast moves Designed power tremendous maneuverability WildCat will astonish well handles top speed Two powerful Thruatmaster 550 motors custom high-pitch props dual rudders trim tabs enable WildCat sweep through such tight maneuvers l80 turns 4 diameter circleat full throttle can enjoy its responsive action almost immediately WildCats advanced ARR design streamlined ABS hull comes joined deck motors stainless steel drive shafts already installed 2-channel Using photo-illustrated instructions can racing WildCat just few hours Nothing handles like WildCat Pilot stylish twin flaming decals picklefork bow through sharpest course WildCat will dime See hobby dealer write us today Jim said mix small amount water put empty accelerator bottle spray bottle fine spray Charlie reminds us shake container vigorously before use Arizona modeler Doug Huntley enclosed clip ping unidentified source suggests using nasal aspirator blow dry baking soda onto CyA glue joint speed curing pro cess According clipping nasal aspirators babies can obtained variety store about $150 Last letter Harold Melson also uses baking soda cautioned fresh CyA fresh baking soda can boil contact other So dont get body parts Har old also stated baking soda works best thin CyA does respectable job thick varieties expect Ill get letters subject column already overdue editor anyone suggests application method different above Ill include next column fingers prop letter Manuel Ornelas treasurer East Bay Radio Control lers should noted operate Enya four-stroke engines Manuel wrote Without doubt Enya engines some better ones developed RC However fourstroke ones have drawback Due loca tion ol glow plug members almost lost tip index finger After starting engine went pull plug connector plug accidentally put index finger through prop didnt realize what hap pened until blood started running down hand After close examination found about inch index finger about fall off helper determined didnt apply tourniquet right away head hospital might bleed death nasty cut Five stitches two hours later re turned field pick up gear plane Everyone field moaned groaned about engine location plug ought law against such design unfamiliar Enya four-stoke question glow plug located ward side cylinder head angled toward prop arc dont know Id sub scribe suggestion should law against such design however would strongly recommend use remote-type glow plug connector Manuels letter suggested manufacturer might want consider including engine Radio Technique/Myers Continued page 39 what want go can take care small fleet Auto matic Cycler-Charger will simultaneously trickle charge three transmitters five receiver packs makes snarl wires too original purpose Trickler re lease Automatic Cycler-Charger field use think man has Automatic Cycler Charger will buy TrickIer simplify life Compendium Trickler @ $3495 cables $5 CaRa Products Canton SD 57013 tel 1-605-987-5924 neat device available Ace R/C Inc add charger came RC system Its called Add-A-Trickle inex pensive doesnt add significantly wire jungle could buy see ben efits trickle charging cold winter winds blow outside sit testing batteries learning buddy Bob Aberle decided build tiny electric-powered model didnt fly very well took plane home tests few min utes answer him Don Srull Hi Line Ltd PO Box 341283 Bethesda MD 20827 took issue answer led battery testing have known long time capacity battery depends discharge rate since never got electric-powered-air plane movement developmental way done serious testing Electric-power bat teries situation Bobs plane presented itself way batteries using run motor rated 450 mAb dis charged 225-mA rate showed 450-mAb ca pacity discharged 900 mA battery packs contained three cells put two packs series test sixcell pack Charge-A-Matic see May 90 column details Aristo-Craft unit did easily Charge-A-Matic allows program various discharge currents up maximum 36 amps Bobs packs also showed full capacity 36 amps thought packs OK Don Srull thought bad airplanes motor draws approximately 10 amps 30 volts So set up another test using three one-ohm 10-watt power resistors Ra dio Shack parallel draw about 10 amps indicated battery capacity cut half FurtherContinued page 110 July 1990 85 Divinjo, 01 Ureat VIans Model Mfg Co PO Box 755 Urbana IL SISOI 2173672069 ~TM fODnDSTBISUIO C0tp1 HERES HOW AMAZING BALSAPITE REDUCES BUBBLES AND SAGS Iron-on coverings tend stick surface balsa & other woods often leaving trapped air sagging coming unglued Balsarite IRON-ON liquid sinks COVERING deep wood s intermixes adhesive theWITH BALSARITE covering ironed No trapped air deep permanent adhesion Eliminates sagging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Coverite Monokote Solarfilm etc must use Balsarite takes gamble out covering iron-ons New Formula Film C 420 BABYLON ROAD HORSHAM PENNSYLVANIA 19044 USA Radio Technique/Myers Continued page 85 cells did maintain 10-amp cur rent Instead current dropped instantly con tinuously Don Srull insisted cells inadequate job hand right tested some Sanyo N-800AR cells red la bel resistor pack batteries held 10-amp current five minutes fact showed over 900 mAh usable capacity moral dont right test dont get right test results story isnt finished Bob using four-cell 50-mAh pack receiver plane order save weight batteries obvi ously couldnt stand up load receiv er two servos Benson SC-i speed control ler idle current measured 20 mA jumped hundreds mAs servos moved 50-mAb pack exhausted itself before could flying told Bob thought receiver would run bet ter three-cell 175-mAh pack tried Weight critical performance Bobs small plane three-cell/175 pack weighed about same Bobs four-cell/SO pack RC system worked better flight performance still miserable got out oscilloscope looked mo tor current Thats discovered SC1 wasnt 100% motor current showed pulses duty cycle about 80% lit tle experimenting trouble traced back three-cell pack SC-i needs full-voltage pulses four-cell pack order reach 100% duty cycle three-cell/175 pack satis fled servos needs speed controller four-cell 100-mAh battery installed radio three-cell N 800AR battery Imp 30 motor plane flew very nicely What conclusion can drawn Ulti mately both problems faced same problem case trying draw far rated current Ni-Cd batteries you will lose termi nal voltage may able fully re cover rated capacity battery order find Out what really have must test under realistic conditions RC Electrics/Kopski Continued page 43 formance displacement-standardized 05 motors has increased over yearsin part driven interest RC carsand notes current Leisure 05 develops 300% power original Astro 05 con tinues feel its shame other pi oneers Electric flight failed recognize development displacement classes Elec tric motors would have provided stable market place similar development sizes Electric motors Fifty years ago AMA recog nized displacement method choice model airplane gas engines Lets join main stream model aviation establish some dis placement classes Electric motors Roland followed up first letter sec ond latter described 05 used Continued page 112 110 Model Aviation MOONEY 201 2 SCALE 70 SPAN 7 8 LBS ENG.40-6O2CYCLE 9O4CYCLE Machine Cut Parts Balsa Kit e Plans Approved3Views Complete Construction Manual Jig Built Flying Surfaces $13995 Complete Hardware p ng Ply Capped Cowl Wing Saddle & Surfaces Complete Decals YI order call write 7p GM Plastics Inc 7252 Industrial Park Blvd Mentor Ohio 44060 /216 953-1188 r 0 HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 ere proud announce TATONE PRODUCTS CORPORATION has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP