tilE 12 VOLt iIACIi U Dave Herbert HAVE RECENTLY rediscovered Electric flying Most folks know fly anything can get hands example fly aerobatics Concept 30 SX helicopter weekend usually fly several fixed-wing planes including ducted-fan P-80 Shooting Star takes quite bit ground support fly models helicopter have special flight box use transport model its ground-support equipment self-contained protects equipment during transport helicopter fits snugly inside box helicopter flight box has helped combine some equipment carry recent weeks have flying Electric Cox Flyboy MRC Electric Cessna Hobby Shack Stick-E Ive running Kraft Eleck-Cycle addition gas equipment usually have Heres problem battery pack different voltage mAh requiring various chargers methods charging charging times guess Im much Electric addict am gas addict confess Im top what may available organize other peoples charging equipment.just own know chargers seemed boxes coming apart sitting shelf wires wrapped around otherwise consistently placed could get use moments notice Another problem wanted fly Electric models Id throw chargers cables meters floor car car become major charging station very inconvenient disorganized Since thats cigarette lighter thats have chargers like also found flying Electric planes school yards no problem because low noise However problem because park car long way Id have fly long walk Carrying chargers planes batteries etc took fun out flying since couldnt take car out onto football field solution build selfcontained portable charging station Electrics goals make station carried its own 12-volt supply along chargers meters batteries could become its own storage system easy placement garage after flying Enter 12-Volt Rack seems peak chargers easy way goyou just plug walk away Since already couple chargers wasnt inclined spend money peak charger motor receiver Cox Flyboy rated 110 mAh since like peak battery before flight happy Jose Tellez gave small pseudo-peak charger low mAli battery pack t Century SystemsAstro Flight field charger forfield charger TX RX Power indicator/ blinking LED PSEUDO Mini-peak charger Master power switch SW-i Coverite pocket thermometer check temp batteries charger faceplate 20 Model Aviation 2-voit ac gives author convenient organized self-contained ground support variety Electric models Milliammeter IROS milliamp analyzer/ call charger pseudo because doesnt detect voltage reversal Instead constant voltage charger means charge rate drops almost zero voltage charger approximates voltage battery Jose modified design could switched four five cells high low rate unit uses improved circuit based design published Model Airplane News PC board available Jose kit fully assembledcontact Capistrano California Aero-Dumpmasters Box 1463 San Juan Capistrano CA 92693 information added milliammeter charger have spent cycles monitoring charge rates light comes fairly brighfly beginaing cycle meter reads approximately 250 milliamps drops trickle approximately two milliamps peak voltage point light goes out am hurry fly can fast-charge battery other chargers place pseudo-mini peak charger walk away have three batteries plane fits flying charging schedule relative gas models mini-charger worked very well very satisfied already needed room another charger carry needed some way organize electric chargers K 28 2-hole corner braces 14 reqdl 51/2 ----4 Mount chargers side batteries charged other side iHE 12 LT RK- charging station Ni-cad batteries Dave Herbe now have Astro Flight charger seven 1500-mAh cells Stik-E Leisure Digital charger similar cells well 450-nAh ones peak chargers Jose mini-i l0-mAh cells also have digital voltmeter ammeter Century Systems field charger latter connected IRCS milliamp analyzer charges transmitter receiver battery same time IRCS meter reads charge current 0-500 milliamps have somewhere put chargersso designed Rack Cut out 12 V 1/2 wood screw source battery 9 91/2 / / /II II wood~1 1/2 wood screws screw design simple rack balanced ease carrying field cut main rack 1/2-inch pine size fit 12-volt battery Since small 12-volt batteries have lip around upper edge case must cut opening battery can slide side fit snugly Make cut around lip battery cannot fall out Use eyelets waxed string tie wraps secure battery Cut comfortable handle hole over Continued page 133 PSEUDO MINIFfAiC CHARGER JOSE 1EUEZ COMPONENTS LIST RADIO SHACK STOCK # R-1 220 ohms 1 watt271-1313 R-2 22K ohms 4 watts271-1325 R-3 1K ohms 15-turn pot271 -342 R-4 220 ohms 4 watts271-1313 R-5 270 ohms 4 watt271-1314 may replaced 1K variable resistor c-i 047 mId 50 volt cap272-1 34 6-2 047 mfd 50 volt cap272-1 34 Lamp #46 63 volt 250 mAh272-1130 LM317T regulator276-1778 mount regulator heat sink276-1363 S-i SPST switch275-346 Output lack274-346 NO 11b lamp 5VV- iruse R-1 220 ohms 0 + ToTol2volt chargersBlinkingsupply LED F RACK5 Power Switch indicator drcui1- Dave Herbert down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses GoldbergUltimate Cowl/Wheel Pants 615 455-0735 Wing Sldnning Video Desaflo II Wkiq Span AA F WIgiW 85-95 Please send $100 Catalog 215 Big Springs Avenue homa TN 37388 1 ea Radio Shack 6 amp SPST power switch 1 ea 220-mAb variable resistor blinking LED 4 ea nail-in casters feet 1 pkg assorted tie wraps/nylon cable clamps 1 can Krylon paint So thats handle chargers has made flying Electrics convenient fun know will same Happy Flying tylShaw Continued page 127 reaching around prop brushed transmitter throttle control YS-120 four-stroke roared life pump blower did job plane became living thing head its own started car hung battery turned plane immediately became airborne flew around 18-inch control line friend could nothing grabbed wing available right hand plane would fly directly After four complete circles control line 18 inches long able pick up transmitter reduce throttle setting plane sitting concrete collapsed lawn chair exhaled great sigh relief flying often become careless things put us others great danger have resolved safety conscious can say John must really love airplane hold onto until could reach transmitter believe faced same dilemma would have tossed plane sure wouldnt thrown toward bystander Thinking about little John probably completed circles record time didnt have time think Would have safer ask another modeler start aircraft John held transmitter Thanks Ni-Cd least John will get another chance lost battery packs June 93 column did short piece entitled Migratory Battery Packs modeler shared some insight what happens receiver battery pack disconnects inside airplane month received another letter describing related incident involving helicopter Modeler F Meichner tells following story pilot just run up helicopter needed little trim idled down moment board battery fell out onto ground allowing fun begin Just gust wind picked up heli swept downwind toward flight line Everyone scattered except lying flat ground breeze stopped heli settled down bumping blade stopping engineno injured time moral storyanchor battery servos securely lock electrical connectors tape twist ties rope whatever will fight vibrations As mentioned June column Ive used Velcro mount equipment everything Piper Cubs wildly gyrating helicopters total success trick success clean surface plenty epoxy taped tied connectors Bullets ballast Letters four modelers month took strong issue regarding Exploding Payload portion June 93 column four letters received shared same opinion no danger live ammunition ammo used aircraft ballast letter particular Bob Hans Coventry Connecticut provided some clarifying information tone pleasant others Bob wrote following Concerning portion piece titled Exploding Payload feel clarification 134 Model Aviation berg 300 Cowl/Wheel Pants WingSpwic100 Wing Area 965sq EngIne 60 Irresli Aire Wing Span 68 WeIgt 85-95 t WIngArea9cflsqhEngine 120 Wing Span w weigri -90 Wing span -95 Wing Area 940 sq h Engine 120 Wing Area 860 sq EngIrw 120 FAX 615 455-0677
Edition: Model Aviation - 1993/09
Page Numbers: 20, 21, 133, 134
tilE 12 VOLt iIACIi U Dave Herbert HAVE RECENTLY rediscovered Electric flying Most folks know fly anything can get hands example fly aerobatics Concept 30 SX helicopter weekend usually fly several fixed-wing planes including ducted-fan P-80 Shooting Star takes quite bit ground support fly models helicopter have special flight box use transport model its ground-support equipment self-contained protects equipment during transport helicopter fits snugly inside box helicopter flight box has helped combine some equipment carry recent weeks have flying Electric Cox Flyboy MRC Electric Cessna Hobby Shack Stick-E Ive running Kraft Eleck-Cycle addition gas equipment usually have Heres problem battery pack different voltage mAh requiring various chargers methods charging charging times guess Im much Electric addict am gas addict confess Im top what may available organize other peoples charging equipment.just own know chargers seemed boxes coming apart sitting shelf wires wrapped around otherwise consistently placed could get use moments notice Another problem wanted fly Electric models Id throw chargers cables meters floor car car become major charging station very inconvenient disorganized Since thats cigarette lighter thats have chargers like also found flying Electric planes school yards no problem because low noise However problem because park car long way Id have fly long walk Carrying chargers planes batteries etc took fun out flying since couldnt take car out onto football field solution build selfcontained portable charging station Electrics goals make station carried its own 12-volt supply along chargers meters batteries could become its own storage system easy placement garage after flying Enter 12-Volt Rack seems peak chargers easy way goyou just plug walk away Since already couple chargers wasnt inclined spend money peak charger motor receiver Cox Flyboy rated 110 mAh since like peak battery before flight happy Jose Tellez gave small pseudo-peak charger low mAli battery pack t Century SystemsAstro Flight field charger forfield charger TX RX Power indicator/ blinking LED PSEUDO Mini-peak charger Master power switch SW-i Coverite pocket thermometer check temp batteries charger faceplate 20 Model Aviation 2-voit ac gives author convenient organized self-contained ground support variety Electric models Milliammeter IROS milliamp analyzer/ call charger pseudo because doesnt detect voltage reversal Instead constant voltage charger means charge rate drops almost zero voltage charger approximates voltage battery Jose modified design could switched four five cells high low rate unit uses improved circuit based design published Model Airplane News PC board available Jose kit fully assembledcontact Capistrano California Aero-Dumpmasters Box 1463 San Juan Capistrano CA 92693 information added milliammeter charger have spent cycles monitoring charge rates light comes fairly brighfly beginaing cycle meter reads approximately 250 milliamps drops trickle approximately two milliamps peak voltage point light goes out am hurry fly can fast-charge battery other chargers place pseudo-mini peak charger walk away have three batteries plane fits flying charging schedule relative gas models mini-charger worked very well very satisfied already needed room another charger carry needed some way organize electric chargers K 28 2-hole corner braces 14 reqdl 51/2 ----4 Mount chargers side batteries charged other side iHE 12 LT RK- charging station Ni-cad batteries Dave Herbe now have Astro Flight charger seven 1500-mAh cells Stik-E Leisure Digital charger similar cells well 450-nAh ones peak chargers Jose mini-i l0-mAh cells also have digital voltmeter ammeter Century Systems field charger latter connected IRCS milliamp analyzer charges transmitter receiver battery same time IRCS meter reads charge current 0-500 milliamps have somewhere put chargersso designed Rack Cut out 12 V 1/2 wood screw source battery 9 91/2 / / /II II wood~1 1/2 wood screws screw design simple rack balanced ease carrying field cut main rack 1/2-inch pine size fit 12-volt battery Since small 12-volt batteries have lip around upper edge case must cut opening battery can slide side fit snugly Make cut around lip battery cannot fall out Use eyelets waxed string tie wraps secure battery Cut comfortable handle hole over Continued page 133 PSEUDO MINIFfAiC CHARGER JOSE 1EUEZ COMPONENTS LIST RADIO SHACK STOCK # R-1 220 ohms 1 watt271-1313 R-2 22K ohms 4 watts271-1325 R-3 1K ohms 15-turn pot271 -342 R-4 220 ohms 4 watts271-1313 R-5 270 ohms 4 watt271-1314 may replaced 1K variable resistor c-i 047 mId 50 volt cap272-1 34 6-2 047 mfd 50 volt cap272-1 34 Lamp #46 63 volt 250 mAh272-1130 LM317T regulator276-1778 mount regulator heat sink276-1363 S-i SPST switch275-346 Output lack274-346 NO 11b lamp 5VV- iruse R-1 220 ohms 0 + ToTol2volt chargersBlinkingsupply LED F RACK5 Power Switch indicator drcui1- Dave Herbert down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses GoldbergUltimate Cowl/Wheel Pants 615 455-0735 Wing Sldnning Video Desaflo II Wkiq Span AA F WIgiW 85-95 Please send $100 Catalog 215 Big Springs Avenue homa TN 37388 1 ea Radio Shack 6 amp SPST power switch 1 ea 220-mAb variable resistor blinking LED 4 ea nail-in casters feet 1 pkg assorted tie wraps/nylon cable clamps 1 can Krylon paint So thats handle chargers has made flying Electrics convenient fun know will same Happy Flying tylShaw Continued page 127 reaching around prop brushed transmitter throttle control YS-120 four-stroke roared life pump blower did job plane became living thing head its own started car hung battery turned plane immediately became airborne flew around 18-inch control line friend could nothing grabbed wing available right hand plane would fly directly After four complete circles control line 18 inches long able pick up transmitter reduce throttle setting plane sitting concrete collapsed lawn chair exhaled great sigh relief flying often become careless things put us others great danger have resolved safety conscious can say John must really love airplane hold onto until could reach transmitter believe faced same dilemma would have tossed plane sure wouldnt thrown toward bystander Thinking about little John probably completed circles record time didnt have time think Would have safer ask another modeler start aircraft John held transmitter Thanks Ni-Cd least John will get another chance lost battery packs June 93 column did short piece entitled Migratory Battery Packs modeler shared some insight what happens receiver battery pack disconnects inside airplane month received another letter describing related incident involving helicopter Modeler F Meichner tells following story pilot just run up helicopter needed little trim idled down moment board battery fell out onto ground allowing fun begin Just gust wind picked up heli swept downwind toward flight line Everyone scattered except lying flat ground breeze stopped heli settled down bumping blade stopping engineno injured time moral storyanchor battery servos securely lock electrical connectors tape twist ties rope whatever will fight vibrations As mentioned June column Ive used Velcro mount equipment everything Piper Cubs wildly gyrating helicopters total success trick success clean surface plenty epoxy taped tied connectors Bullets ballast Letters four modelers month took strong issue regarding Exploding Payload portion June 93 column four letters received shared same opinion no danger live ammunition ammo used aircraft ballast letter particular Bob Hans Coventry Connecticut provided some clarifying information tone pleasant others Bob wrote following Concerning portion piece titled Exploding Payload feel clarification 134 Model Aviation berg 300 Cowl/Wheel Pants WingSpwic100 Wing Area 965sq EngIne 60 Irresli Aire Wing Span 68 WeIgt 85-95 t WIngArea9cflsqhEngine 120 Wing Span w weigri -90 Wing span -95 Wing Area 940 sq h Engine 120 Wing Area 860 sq EngIrw 120 FAX 615 455-0677
Edition: Model Aviation - 1993/09
Page Numbers: 20, 21, 133, 134
tilE 12 VOLt iIACIi U Dave Herbert HAVE RECENTLY rediscovered Electric flying Most folks know fly anything can get hands example fly aerobatics Concept 30 SX helicopter weekend usually fly several fixed-wing planes including ducted-fan P-80 Shooting Star takes quite bit ground support fly models helicopter have special flight box use transport model its ground-support equipment self-contained protects equipment during transport helicopter fits snugly inside box helicopter flight box has helped combine some equipment carry recent weeks have flying Electric Cox Flyboy MRC Electric Cessna Hobby Shack Stick-E Ive running Kraft Eleck-Cycle addition gas equipment usually have Heres problem battery pack different voltage mAh requiring various chargers methods charging charging times guess Im much Electric addict am gas addict confess Im top what may available organize other peoples charging equipment.just own know chargers seemed boxes coming apart sitting shelf wires wrapped around otherwise consistently placed could get use moments notice Another problem wanted fly Electric models Id throw chargers cables meters floor car car become major charging station very inconvenient disorganized Since thats cigarette lighter thats have chargers like also found flying Electric planes school yards no problem because low noise However problem because park car long way Id have fly long walk Carrying chargers planes batteries etc took fun out flying since couldnt take car out onto football field solution build selfcontained portable charging station Electrics goals make station carried its own 12-volt supply along chargers meters batteries could become its own storage system easy placement garage after flying Enter 12-Volt Rack seems peak chargers easy way goyou just plug walk away Since already couple chargers wasnt inclined spend money peak charger motor receiver Cox Flyboy rated 110 mAh since like peak battery before flight happy Jose Tellez gave small pseudo-peak charger low mAli battery pack t Century SystemsAstro Flight field charger forfield charger TX RX Power indicator/ blinking LED PSEUDO Mini-peak charger Master power switch SW-i Coverite pocket thermometer check temp batteries charger faceplate 20 Model Aviation 2-voit ac gives author convenient organized self-contained ground support variety Electric models Milliammeter IROS milliamp analyzer/ call charger pseudo because doesnt detect voltage reversal Instead constant voltage charger means charge rate drops almost zero voltage charger approximates voltage battery Jose modified design could switched four five cells high low rate unit uses improved circuit based design published Model Airplane News PC board available Jose kit fully assembledcontact Capistrano California Aero-Dumpmasters Box 1463 San Juan Capistrano CA 92693 information added milliammeter charger have spent cycles monitoring charge rates light comes fairly brighfly beginaing cycle meter reads approximately 250 milliamps drops trickle approximately two milliamps peak voltage point light goes out am hurry fly can fast-charge battery other chargers place pseudo-mini peak charger walk away have three batteries plane fits flying charging schedule relative gas models mini-charger worked very well very satisfied already needed room another charger carry needed some way organize electric chargers K 28 2-hole corner braces 14 reqdl 51/2 ----4 Mount chargers side batteries charged other side iHE 12 LT RK- charging station Ni-cad batteries Dave Herbe now have Astro Flight charger seven 1500-mAh cells Stik-E Leisure Digital charger similar cells well 450-nAh ones peak chargers Jose mini-i l0-mAh cells also have digital voltmeter ammeter Century Systems field charger latter connected IRCS milliamp analyzer charges transmitter receiver battery same time IRCS meter reads charge current 0-500 milliamps have somewhere put chargersso designed Rack Cut out 12 V 1/2 wood screw source battery 9 91/2 / / /II II wood~1 1/2 wood screws screw design simple rack balanced ease carrying field cut main rack 1/2-inch pine size fit 12-volt battery Since small 12-volt batteries have lip around upper edge case must cut opening battery can slide side fit snugly Make cut around lip battery cannot fall out Use eyelets waxed string tie wraps secure battery Cut comfortable handle hole over Continued page 133 PSEUDO MINIFfAiC CHARGER JOSE 1EUEZ COMPONENTS LIST RADIO SHACK STOCK # R-1 220 ohms 1 watt271-1313 R-2 22K ohms 4 watts271-1325 R-3 1K ohms 15-turn pot271 -342 R-4 220 ohms 4 watts271-1313 R-5 270 ohms 4 watt271-1314 may replaced 1K variable resistor c-i 047 mId 50 volt cap272-1 34 6-2 047 mfd 50 volt cap272-1 34 Lamp #46 63 volt 250 mAh272-1130 LM317T regulator276-1778 mount regulator heat sink276-1363 S-i SPST switch275-346 Output lack274-346 NO 11b lamp 5VV- iruse R-1 220 ohms 0 + ToTol2volt chargersBlinkingsupply LED F RACK5 Power Switch indicator drcui1- Dave Herbert down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses GoldbergUltimate Cowl/Wheel Pants 615 455-0735 Wing Sldnning Video Desaflo II Wkiq Span AA F WIgiW 85-95 Please send $100 Catalog 215 Big Springs Avenue homa TN 37388 1 ea Radio Shack 6 amp SPST power switch 1 ea 220-mAb variable resistor blinking LED 4 ea nail-in casters feet 1 pkg assorted tie wraps/nylon cable clamps 1 can Krylon paint So thats handle chargers has made flying Electrics convenient fun know will same Happy Flying tylShaw Continued page 127 reaching around prop brushed transmitter throttle control YS-120 four-stroke roared life pump blower did job plane became living thing head its own started car hung battery turned plane immediately became airborne flew around 18-inch control line friend could nothing grabbed wing available right hand plane would fly directly After four complete circles control line 18 inches long able pick up transmitter reduce throttle setting plane sitting concrete collapsed lawn chair exhaled great sigh relief flying often become careless things put us others great danger have resolved safety conscious can say John must really love airplane hold onto until could reach transmitter believe faced same dilemma would have tossed plane sure wouldnt thrown toward bystander Thinking about little John probably completed circles record time didnt have time think Would have safer ask another modeler start aircraft John held transmitter Thanks Ni-Cd least John will get another chance lost battery packs June 93 column did short piece entitled Migratory Battery Packs modeler shared some insight what happens receiver battery pack disconnects inside airplane month received another letter describing related incident involving helicopter Modeler F Meichner tells following story pilot just run up helicopter needed little trim idled down moment board battery fell out onto ground allowing fun begin Just gust wind picked up heli swept downwind toward flight line Everyone scattered except lying flat ground breeze stopped heli settled down bumping blade stopping engineno injured time moral storyanchor battery servos securely lock electrical connectors tape twist ties rope whatever will fight vibrations As mentioned June column Ive used Velcro mount equipment everything Piper Cubs wildly gyrating helicopters total success trick success clean surface plenty epoxy taped tied connectors Bullets ballast Letters four modelers month took strong issue regarding Exploding Payload portion June 93 column four letters received shared same opinion no danger live ammunition ammo used aircraft ballast letter particular Bob Hans Coventry Connecticut provided some clarifying information tone pleasant others Bob wrote following Concerning portion piece titled Exploding Payload feel clarification 134 Model Aviation berg 300 Cowl/Wheel Pants WingSpwic100 Wing Area 965sq EngIne 60 Irresli Aire Wing Span 68 WeIgt 85-95 t WIngArea9cflsqhEngine 120 Wing Span w weigri -90 Wing span -95 Wing Area 940 sq h Engine 120 Wing Area 860 sq EngIrw 120 FAX 615 455-0677
Edition: Model Aviation - 1993/09
Page Numbers: 20, 21, 133, 134
tilE 12 VOLt iIACIi U Dave Herbert HAVE RECENTLY rediscovered Electric flying Most folks know fly anything can get hands example fly aerobatics Concept 30 SX helicopter weekend usually fly several fixed-wing planes including ducted-fan P-80 Shooting Star takes quite bit ground support fly models helicopter have special flight box use transport model its ground-support equipment self-contained protects equipment during transport helicopter fits snugly inside box helicopter flight box has helped combine some equipment carry recent weeks have flying Electric Cox Flyboy MRC Electric Cessna Hobby Shack Stick-E Ive running Kraft Eleck-Cycle addition gas equipment usually have Heres problem battery pack different voltage mAh requiring various chargers methods charging charging times guess Im much Electric addict am gas addict confess Im top what may available organize other peoples charging equipment.just own know chargers seemed boxes coming apart sitting shelf wires wrapped around otherwise consistently placed could get use moments notice Another problem wanted fly Electric models Id throw chargers cables meters floor car car become major charging station very inconvenient disorganized Since thats cigarette lighter thats have chargers like also found flying Electric planes school yards no problem because low noise However problem because park car long way Id have fly long walk Carrying chargers planes batteries etc took fun out flying since couldnt take car out onto football field solution build selfcontained portable charging station Electrics goals make station carried its own 12-volt supply along chargers meters batteries could become its own storage system easy placement garage after flying Enter 12-Volt Rack seems peak chargers easy way goyou just plug walk away Since already couple chargers wasnt inclined spend money peak charger motor receiver Cox Flyboy rated 110 mAh since like peak battery before flight happy Jose Tellez gave small pseudo-peak charger low mAli battery pack t Century SystemsAstro Flight field charger forfield charger TX RX Power indicator/ blinking LED PSEUDO Mini-peak charger Master power switch SW-i Coverite pocket thermometer check temp batteries charger faceplate 20 Model Aviation 2-voit ac gives author convenient organized self-contained ground support variety Electric models Milliammeter IROS milliamp analyzer/ call charger pseudo because doesnt detect voltage reversal Instead constant voltage charger means charge rate drops almost zero voltage charger approximates voltage battery Jose modified design could switched four five cells high low rate unit uses improved circuit based design published Model Airplane News PC board available Jose kit fully assembledcontact Capistrano California Aero-Dumpmasters Box 1463 San Juan Capistrano CA 92693 information added milliammeter charger have spent cycles monitoring charge rates light comes fairly brighfly beginaing cycle meter reads approximately 250 milliamps drops trickle approximately two milliamps peak voltage point light goes out am hurry fly can fast-charge battery other chargers place pseudo-mini peak charger walk away have three batteries plane fits flying charging schedule relative gas models mini-charger worked very well very satisfied already needed room another charger carry needed some way organize electric chargers K 28 2-hole corner braces 14 reqdl 51/2 ----4 Mount chargers side batteries charged other side iHE 12 LT RK- charging station Ni-cad batteries Dave Herbe now have Astro Flight charger seven 1500-mAh cells Stik-E Leisure Digital charger similar cells well 450-nAh ones peak chargers Jose mini-i l0-mAh cells also have digital voltmeter ammeter Century Systems field charger latter connected IRCS milliamp analyzer charges transmitter receiver battery same time IRCS meter reads charge current 0-500 milliamps have somewhere put chargersso designed Rack Cut out 12 V 1/2 wood screw source battery 9 91/2 / / /II II wood~1 1/2 wood screws screw design simple rack balanced ease carrying field cut main rack 1/2-inch pine size fit 12-volt battery Since small 12-volt batteries have lip around upper edge case must cut opening battery can slide side fit snugly Make cut around lip battery cannot fall out Use eyelets waxed string tie wraps secure battery Cut comfortable handle hole over Continued page 133 PSEUDO MINIFfAiC CHARGER JOSE 1EUEZ COMPONENTS LIST RADIO SHACK STOCK # R-1 220 ohms 1 watt271-1313 R-2 22K ohms 4 watts271-1325 R-3 1K ohms 15-turn pot271 -342 R-4 220 ohms 4 watts271-1313 R-5 270 ohms 4 watt271-1314 may replaced 1K variable resistor c-i 047 mId 50 volt cap272-1 34 6-2 047 mfd 50 volt cap272-1 34 Lamp #46 63 volt 250 mAh272-1130 LM317T regulator276-1778 mount regulator heat sink276-1363 S-i SPST switch275-346 Output lack274-346 NO 11b lamp 5VV- iruse R-1 220 ohms 0 + ToTol2volt chargersBlinkingsupply LED F RACK5 Power Switch indicator drcui1- Dave Herbert down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses GoldbergUltimate Cowl/Wheel Pants 615 455-0735 Wing Sldnning Video Desaflo II Wkiq Span AA F WIgiW 85-95 Please send $100 Catalog 215 Big Springs Avenue homa TN 37388 1 ea Radio Shack 6 amp SPST power switch 1 ea 220-mAb variable resistor blinking LED 4 ea nail-in casters feet 1 pkg assorted tie wraps/nylon cable clamps 1 can Krylon paint So thats handle chargers has made flying Electrics convenient fun know will same Happy Flying tylShaw Continued page 127 reaching around prop brushed transmitter throttle control YS-120 four-stroke roared life pump blower did job plane became living thing head its own started car hung battery turned plane immediately became airborne flew around 18-inch control line friend could nothing grabbed wing available right hand plane would fly directly After four complete circles control line 18 inches long able pick up transmitter reduce throttle setting plane sitting concrete collapsed lawn chair exhaled great sigh relief flying often become careless things put us others great danger have resolved safety conscious can say John must really love airplane hold onto until could reach transmitter believe faced same dilemma would have tossed plane sure wouldnt thrown toward bystander Thinking about little John probably completed circles record time didnt have time think Would have safer ask another modeler start aircraft John held transmitter Thanks Ni-Cd least John will get another chance lost battery packs June 93 column did short piece entitled Migratory Battery Packs modeler shared some insight what happens receiver battery pack disconnects inside airplane month received another letter describing related incident involving helicopter Modeler F Meichner tells following story pilot just run up helicopter needed little trim idled down moment board battery fell out onto ground allowing fun begin Just gust wind picked up heli swept downwind toward flight line Everyone scattered except lying flat ground breeze stopped heli settled down bumping blade stopping engineno injured time moral storyanchor battery servos securely lock electrical connectors tape twist ties rope whatever will fight vibrations As mentioned June column Ive used Velcro mount equipment everything Piper Cubs wildly gyrating helicopters total success trick success clean surface plenty epoxy taped tied connectors Bullets ballast Letters four modelers month took strong issue regarding Exploding Payload portion June 93 column four letters received shared same opinion no danger live ammunition ammo used aircraft ballast letter particular Bob Hans Coventry Connecticut provided some clarifying information tone pleasant others Bob wrote following Concerning portion piece titled Exploding Payload feel clarification 134 Model Aviation berg 300 Cowl/Wheel Pants WingSpwic100 Wing Area 965sq EngIne 60 Irresli Aire Wing Span 68 WeIgt 85-95 t WIngArea9cflsqhEngine 120 Wing Span w weigri -90 Wing span -95 Wing Area 940 sq h Engine 120 Wing Area 860 sq EngIrw 120 FAX 615 455-0677