George M Mye 7Radiomchnque ABSTRACT Accu-Tach 2A review Applica tions discussed Light levels multiblade pro- pellers remote sensor shunt resistances ESV peak-detection charging OLD FRIEND REVISITED first reported Accu-Tach 2 February 1985 issue Model Aviation instrument com bines digital voltmeter ammeter tachome ter light handy package Accu-Tach 2 has provided excellent service three years essential part field kit manufacturer device now Norcal Avionics Div A-B Tech Inc 5689 Glasgow Troy MI 48098 telephone 313 8288210 Accu-Tach 2A adds remote tachometer probe clip leads handy zipper pouch catalog couple labels have added de fine function Tachometer/Voltmeter se lector switch built-in tachometer sensor otherwise the Accu-Tach remains its old dependable self What follows may sound little familiar have read remember previous columns know some people because made purchase recently San Antonio Hob Shop Palo Alto CA live NY Shawn Berkheimer looked name travelers check asked still have metal detector get use both surprised flattered Shawn referring TOTO OR-AMP COM BAT TE RY WI REJ picture page 28 of September 1982 issue MA five years ago am search ing lawn needle valve Heli copter engine Accu-Tach 2A has LCD display uses big x /2-in numbers display values between 1999 numbers can read 450 off per pendicular directions Settling time reading four five seconds before Accu-Tach 2A will following 1 Measure DC voltage VDC autopolarity unloaded Shunt resis tance 506k ohms range ade quate diagnosing troubles kinds likely encount ered transmitters receivers servos avoiding FET cir cuits Usable 12 VDC starter batteries nickle-cadmium battery packs contain ing up 13 cells use check things automobile also readout cen Heres modify aileron extender cable can use ammeterlike Accu-Tach 2 instanceto check much current airborne system drawing Its great help checking stalled servos binding hinges Read tiVolts 1 cV V Add zero inter pret display millivolts 1000 mV lt 2Measure rpm 35000 rpm optically light levels above 10 lux range sufficient electric alcohol- gasoline-fueled engines used power model airplanes scale direct reading must add zero x 10 scale two zeros x 100 scale get rpm 3Measure DC current 1999 ADC REMOTE SENSOR SOCKET \ TACHOMETER OFF______ VOLT/AMPACCU-TACH 2A METER x Volt Amp Tx Corn t1999 CENTI VOLTS DC 199 9 MILLI AMPS DC HIGH-CURRENT ADAPTER FOR ESV ESV COMMON LEAD FOR MEASUREMENTS TX& RPM /10 rJ RX& RPM/1O sketch identifies input connections Accu-Tach 2a Newest version Accu-Tach 2 L comes neat carrying case *nd auxiliary tachometer probe Myers finds device Indis pensible addition field kitalso good some jobs car innards tech probe look like R Some interesting potential uses naked sensor include building ducted-fan model ease checking fan rpm Column addresses uses meter 32 Model Aviation 70 Froehlkh Farm Rd HIckaville NY 11801 autopolarity reading milliamps measuring voltage drop across meter current running through t calculated series insertion / ohm 5% range nicely fits kinds RC uses such measuring charging discharging currents typical transmitters servos battery packs full RC systems will nor measure currents typical electric starters propulsion motors 4 Expanded-scale voltmeter VDC autopolarity testing batteries Built-in switch-selected load resistors RX po sition hms TX position hms pro duce nominal 240 mA load good test value usual AA pencell nickle-cadmium batteries found RC systems Indicates centivolts 1 cV V Lets look some applications Tachometer Push switch located left side case towards tachometer eye top case point eye towards whirling propeller keeping six-inch clearance read rpm An accessory probe plugs side case situations cant easily see numbers instrument position make measurement Two measuring ranges provided x 10 x 100 have add either two zeros reading counter works 70000 pulses per minute reads 35000 rpm two bladed propeller Multiply rpm reading 2/n correct number blades propeller using single-bladed propeller multiply number indicated fac tor 2/1 op has three blades multiply indicated number 24 prop has four blades multiply indication 2/4 dangerous contact rotating machin ery necessary new remote optical probe fits through 1 A-in-diameter hole may simplify some measurement want make open probe remove sensor will have hand tiny device can built directly plane looking directly ducted fan spinner instance sensor alone fits -in -diameter hole its mount A-in hole ran little test find operating light lev els rpm measurements Using Minolta Flashmeter III lux-meter propeller mounted shaft drill motor test object minimum required illumination about 10 lux Thats too dark flying couldnt find maximum value daylight making measurements learned have careful about shadows reflections sensor can see meter will indicate value thats too high Milliammeter panel marked Amp meter dicates directly milliamps range interest RCers ammeter limited Amps because internal circuitry set up wayand because 3-digit dis play limited 1999 counts ICs notoriously intolerant overloads Bob Aberles suggestion made red lead fused ammeter lead inserting Radio Shack Inline Mini Fuse Holder #270-1238 used two-amp fuses #270-12 increases insertion resistance about 14 ohm may too much some tests its handy Ive already blown couple fuses Accu Continued page 132 April 1988 33 AL L PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS OFF tUT Ills unique device tor cutting nign quaiity warn wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package*8750 plus $3 shipping handling 24 Volt Variable Output Power Supply$5250 piua *3 ahipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings 4 $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road MS$VCWd Wichita Falls TX 76310 Tel 817 692-4475 proud announce TATONE PRODUCTS CORPORATION HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GATOR RIC PRODUCTS An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area- 860 sq Complete Delux KitSI 5995 TIGER TAIL 4S DELUX ALL BALSA KIT PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters Included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia 25 895 t/diax25 995 diax3S1495 feather Ilte glass cloth 7 az/sq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull sight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Bearing Puller5 695 Bothpor51395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out tool complete instrutnons log trimming out airplane quality book carrying caseS 795 NEWI WING MOUMING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included S 595 READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40 Piper Gherokee-25 Fokker E111-40 Fancy Stick-25 Cessna 172-20 engine included Zh SUNSHINE HOBBY 17721 South Western Avenue Gardena California 90247 Check free movement controls set up throws Covering Following usual practice used transparent MonoKote Cal sug gested lightweight silk tissue however model certainly would delightful covered silk new iron-on fab rics transparent colors would also viable alternative sprayed Poly U trim over Mono Kote light rubbing 000-grade steel wool aids adhesion preference Sig Stripe Rite masking Brushing coat Sig clear Skybrite great preventing bleeders also used Stripe Rite pin stripes letters vinyl stick-on ones office supply store Banner wheels used prototype certainly add appearance points used samples new hinge material model recommend Klett Sig pinned hinges safeguard drill hole insert small piece toothpick securing CyA covered Sportwagon RC equipment place hadnt done way quite some time really simpler easier effort Cut window holes out shrunken MonoKote Cut window plastic out line over plans using Wilhold RC 56 ad hesive secure windows inside frame windscreen will need trimmed slightly good fit Position inside ply rear onto tiny cut outs MonoKote Stripe Rite tape used joint primed tank engine compart ments Skybrite painted Poly U Flying Remember used fly sport Free Flight dream day wed able make turn back land feet Want bet thought went around Cal Smiths mind 1948 Well golly 37 years later can know some purists detest contra diction term what have RC-assisted Free Flight incarna tion Cals sexy little Free Flight gets fly around merrilyand get watch giving occasional directional changes $12999 $9599 $11999 $6999 $9999 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT 168 MIXING CUPS ground Point nose wind advance power up away goes radio may needed slight course corrections might change elevator bit adjust rate climb keep soaring too high flies adjust chugging around looking pretty re alistic air isnt what youre after use Sportwagon practice maneuvers like stall turns yes lazy loops model has excellent versatility Cal Smith did homework well Men Cal Smiths extraordinary gifts energy dont come along very often Artist author model designer Cal sort Renaissance man model avia tion closing 1969 tribute Model Airplane News excerpted above Bill Win ter declared Forgotten Cal will never hope updating Sportwagon will help keep memory its designer alive Radio Technique/Myers Continued page 33 Tach 2 still works must good idea Thanks Bob Making use idea presented column back October 79 Accu-Tach 2 handbook suggests used evaluate RC system installation cut battery lead aileron adapter cable con nect cut ends milliamoneter like Accu Tach 2 Put adapter between flight pack switch harness Turn transmitter receiver observe current being drawn try control its extreme position trim available same extreme can stall servo position will see amps jump way up stay up warning reset throttle stop clear epoxy out binges make additional clear ance pushrods etc can put modi fied aileron extender cable between servo receiver evaluate particular servo instal lation problems may work system installation insertion resistance Accu Tach 2 oscillator strobes display may drive system instability happens youll have make measure ment analog VOM kind pointer using 500 mA range 132 Model Aviation unuu ruriurmance System TOP PERFORMANCE K&B ENGINES AkplaneMauine K&B FUELS168 GLOW PLUGS 9 Blends4 Choices See Dealer Order Direct Inciude S2 Per Item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 l 476-8639 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 32, 33, 132, 133
George M Mye 7Radiomchnque ABSTRACT Accu-Tach 2A review Applica tions discussed Light levels multiblade pro- pellers remote sensor shunt resistances ESV peak-detection charging OLD FRIEND REVISITED first reported Accu-Tach 2 February 1985 issue Model Aviation instrument com bines digital voltmeter ammeter tachome ter light handy package Accu-Tach 2 has provided excellent service three years essential part field kit manufacturer device now Norcal Avionics Div A-B Tech Inc 5689 Glasgow Troy MI 48098 telephone 313 8288210 Accu-Tach 2A adds remote tachometer probe clip leads handy zipper pouch catalog couple labels have added de fine function Tachometer/Voltmeter se lector switch built-in tachometer sensor otherwise the Accu-Tach remains its old dependable self What follows may sound little familiar have read remember previous columns know some people because made purchase recently San Antonio Hob Shop Palo Alto CA live NY Shawn Berkheimer looked name travelers check asked still have metal detector get use both surprised flattered Shawn referring TOTO OR-AMP COM BAT TE RY WI REJ picture page 28 of September 1982 issue MA five years ago am search ing lawn needle valve Heli copter engine Accu-Tach 2A has LCD display uses big x /2-in numbers display values between 1999 numbers can read 450 off per pendicular directions Settling time reading four five seconds before Accu-Tach 2A will following 1 Measure DC voltage VDC autopolarity unloaded Shunt resis tance 506k ohms range ade quate diagnosing troubles kinds likely encount ered transmitters receivers servos avoiding FET cir cuits Usable 12 VDC starter batteries nickle-cadmium battery packs contain ing up 13 cells use check things automobile also readout cen Heres modify aileron extender cable can use ammeterlike Accu-Tach 2 instanceto check much current airborne system drawing Its great help checking stalled servos binding hinges Read tiVolts 1 cV V Add zero inter pret display millivolts 1000 mV lt 2Measure rpm 35000 rpm optically light levels above 10 lux range sufficient electric alcohol- gasoline-fueled engines used power model airplanes scale direct reading must add zero x 10 scale two zeros x 100 scale get rpm 3Measure DC current 1999 ADC REMOTE SENSOR SOCKET \ TACHOMETER OFF______ VOLT/AMPACCU-TACH 2A METER x Volt Amp Tx Corn t1999 CENTI VOLTS DC 199 9 MILLI AMPS DC HIGH-CURRENT ADAPTER FOR ESV ESV COMMON LEAD FOR MEASUREMENTS TX& RPM /10 rJ RX& RPM/1O sketch identifies input connections Accu-Tach 2a Newest version Accu-Tach 2 L comes neat carrying case *nd auxiliary tachometer probe Myers finds device Indis pensible addition field kitalso good some jobs car innards tech probe look like R Some interesting potential uses naked sensor include building ducted-fan model ease checking fan rpm Column addresses uses meter 32 Model Aviation 70 Froehlkh Farm Rd HIckaville NY 11801 autopolarity reading milliamps measuring voltage drop across meter current running through t calculated series insertion / ohm 5% range nicely fits kinds RC uses such measuring charging discharging currents typical transmitters servos battery packs full RC systems will nor measure currents typical electric starters propulsion motors 4 Expanded-scale voltmeter VDC autopolarity testing batteries Built-in switch-selected load resistors RX po sition hms TX position hms pro duce nominal 240 mA load good test value usual AA pencell nickle-cadmium batteries found RC systems Indicates centivolts 1 cV V Lets look some applications Tachometer Push switch located left side case towards tachometer eye top case point eye towards whirling propeller keeping six-inch clearance read rpm An accessory probe plugs side case situations cant easily see numbers instrument position make measurement Two measuring ranges provided x 10 x 100 have add either two zeros reading counter works 70000 pulses per minute reads 35000 rpm two bladed propeller Multiply rpm reading 2/n correct number blades propeller using single-bladed propeller multiply number indicated fac tor 2/1 op has three blades multiply indicated number 24 prop has four blades multiply indication 2/4 dangerous contact rotating machin ery necessary new remote optical probe fits through 1 A-in-diameter hole may simplify some measurement want make open probe remove sensor will have hand tiny device can built directly plane looking directly ducted fan spinner instance sensor alone fits -in -diameter hole its mount A-in hole ran little test find operating light lev els rpm measurements Using Minolta Flashmeter III lux-meter propeller mounted shaft drill motor test object minimum required illumination about 10 lux Thats too dark flying couldnt find maximum value daylight making measurements learned have careful about shadows reflections sensor can see meter will indicate value thats too high Milliammeter panel marked Amp meter dicates directly milliamps range interest RCers ammeter limited Amps because internal circuitry set up wayand because 3-digit dis play limited 1999 counts ICs notoriously intolerant overloads Bob Aberles suggestion made red lead fused ammeter lead inserting Radio Shack Inline Mini Fuse Holder #270-1238 used two-amp fuses #270-12 increases insertion resistance about 14 ohm may too much some tests its handy Ive already blown couple fuses Accu Continued page 132 April 1988 33 AL L PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS OFF tUT Ills unique device tor cutting nign quaiity warn wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package*8750 plus $3 shipping handling 24 Volt Variable Output Power Supply$5250 piua *3 ahipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings 4 $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road MS$VCWd Wichita Falls TX 76310 Tel 817 692-4475 proud announce TATONE PRODUCTS CORPORATION HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GATOR RIC PRODUCTS An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area- 860 sq Complete Delux KitSI 5995 TIGER TAIL 4S DELUX ALL BALSA KIT PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters Included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia 25 895 t/diax25 995 diax3S1495 feather Ilte glass cloth 7 az/sq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull sight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Bearing Puller5 695 Bothpor51395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out tool complete instrutnons log trimming out airplane quality book carrying caseS 795 NEWI WING MOUMING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included S 595 READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40 Piper Gherokee-25 Fokker E111-40 Fancy Stick-25 Cessna 172-20 engine included Zh SUNSHINE HOBBY 17721 South Western Avenue Gardena California 90247 Check free movement controls set up throws Covering Following usual practice used transparent MonoKote Cal sug gested lightweight silk tissue however model certainly would delightful covered silk new iron-on fab rics transparent colors would also viable alternative sprayed Poly U trim over Mono Kote light rubbing 000-grade steel wool aids adhesion preference Sig Stripe Rite masking Brushing coat Sig clear Skybrite great preventing bleeders also used Stripe Rite pin stripes letters vinyl stick-on ones office supply store Banner wheels used prototype certainly add appearance points used samples new hinge material model recommend Klett Sig pinned hinges safeguard drill hole insert small piece toothpick securing CyA covered Sportwagon RC equipment place hadnt done way quite some time really simpler easier effort Cut window holes out shrunken MonoKote Cut window plastic out line over plans using Wilhold RC 56 ad hesive secure windows inside frame windscreen will need trimmed slightly good fit Position inside ply rear onto tiny cut outs MonoKote Stripe Rite tape used joint primed tank engine compart ments Skybrite painted Poly U Flying Remember used fly sport Free Flight dream day wed able make turn back land feet Want bet thought went around Cal Smiths mind 1948 Well golly 37 years later can know some purists detest contra diction term what have RC-assisted Free Flight incarna tion Cals sexy little Free Flight gets fly around merrilyand get watch giving occasional directional changes $12999 $9599 $11999 $6999 $9999 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT 168 MIXING CUPS ground Point nose wind advance power up away goes radio may needed slight course corrections might change elevator bit adjust rate climb keep soaring too high flies adjust chugging around looking pretty re alistic air isnt what youre after use Sportwagon practice maneuvers like stall turns yes lazy loops model has excellent versatility Cal Smith did homework well Men Cal Smiths extraordinary gifts energy dont come along very often Artist author model designer Cal sort Renaissance man model avia tion closing 1969 tribute Model Airplane News excerpted above Bill Win ter declared Forgotten Cal will never hope updating Sportwagon will help keep memory its designer alive Radio Technique/Myers Continued page 33 Tach 2 still works must good idea Thanks Bob Making use idea presented column back October 79 Accu-Tach 2 handbook suggests used evaluate RC system installation cut battery lead aileron adapter cable con nect cut ends milliamoneter like Accu Tach 2 Put adapter between flight pack switch harness Turn transmitter receiver observe current being drawn try control its extreme position trim available same extreme can stall servo position will see amps jump way up stay up warning reset throttle stop clear epoxy out binges make additional clear ance pushrods etc can put modi fied aileron extender cable between servo receiver evaluate particular servo instal lation problems may work system installation insertion resistance Accu Tach 2 oscillator strobes display may drive system instability happens youll have make measure ment analog VOM kind pointer using 500 mA range 132 Model Aviation unuu ruriurmance System TOP PERFORMANCE K&B ENGINES AkplaneMauine K&B FUELS168 GLOW PLUGS 9 Blends4 Choices See Dealer Order Direct Inciude S2 Per Item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 l 476-8639 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 32, 33, 132, 133
George M Mye 7Radiomchnque ABSTRACT Accu-Tach 2A review Applica tions discussed Light levels multiblade pro- pellers remote sensor shunt resistances ESV peak-detection charging OLD FRIEND REVISITED first reported Accu-Tach 2 February 1985 issue Model Aviation instrument com bines digital voltmeter ammeter tachome ter light handy package Accu-Tach 2 has provided excellent service three years essential part field kit manufacturer device now Norcal Avionics Div A-B Tech Inc 5689 Glasgow Troy MI 48098 telephone 313 8288210 Accu-Tach 2A adds remote tachometer probe clip leads handy zipper pouch catalog couple labels have added de fine function Tachometer/Voltmeter se lector switch built-in tachometer sensor otherwise the Accu-Tach remains its old dependable self What follows may sound little familiar have read remember previous columns know some people because made purchase recently San Antonio Hob Shop Palo Alto CA live NY Shawn Berkheimer looked name travelers check asked still have metal detector get use both surprised flattered Shawn referring TOTO OR-AMP COM BAT TE RY WI REJ picture page 28 of September 1982 issue MA five years ago am search ing lawn needle valve Heli copter engine Accu-Tach 2A has LCD display uses big x /2-in numbers display values between 1999 numbers can read 450 off per pendicular directions Settling time reading four five seconds before Accu-Tach 2A will following 1 Measure DC voltage VDC autopolarity unloaded Shunt resis tance 506k ohms range ade quate diagnosing troubles kinds likely encount ered transmitters receivers servos avoiding FET cir cuits Usable 12 VDC starter batteries nickle-cadmium battery packs contain ing up 13 cells use check things automobile also readout cen Heres modify aileron extender cable can use ammeterlike Accu-Tach 2 instanceto check much current airborne system drawing Its great help checking stalled servos binding hinges Read tiVolts 1 cV V Add zero inter pret display millivolts 1000 mV lt 2Measure rpm 35000 rpm optically light levels above 10 lux range sufficient electric alcohol- gasoline-fueled engines used power model airplanes scale direct reading must add zero x 10 scale two zeros x 100 scale get rpm 3Measure DC current 1999 ADC REMOTE SENSOR SOCKET \ TACHOMETER OFF______ VOLT/AMPACCU-TACH 2A METER x Volt Amp Tx Corn t1999 CENTI VOLTS DC 199 9 MILLI AMPS DC HIGH-CURRENT ADAPTER FOR ESV ESV COMMON LEAD FOR MEASUREMENTS TX& RPM /10 rJ RX& RPM/1O sketch identifies input connections Accu-Tach 2a Newest version Accu-Tach 2 L comes neat carrying case *nd auxiliary tachometer probe Myers finds device Indis pensible addition field kitalso good some jobs car innards tech probe look like R Some interesting potential uses naked sensor include building ducted-fan model ease checking fan rpm Column addresses uses meter 32 Model Aviation 70 Froehlkh Farm Rd HIckaville NY 11801 autopolarity reading milliamps measuring voltage drop across meter current running through t calculated series insertion / ohm 5% range nicely fits kinds RC uses such measuring charging discharging currents typical transmitters servos battery packs full RC systems will nor measure currents typical electric starters propulsion motors 4 Expanded-scale voltmeter VDC autopolarity testing batteries Built-in switch-selected load resistors RX po sition hms TX position hms pro duce nominal 240 mA load good test value usual AA pencell nickle-cadmium batteries found RC systems Indicates centivolts 1 cV V Lets look some applications Tachometer Push switch located left side case towards tachometer eye top case point eye towards whirling propeller keeping six-inch clearance read rpm An accessory probe plugs side case situations cant easily see numbers instrument position make measurement Two measuring ranges provided x 10 x 100 have add either two zeros reading counter works 70000 pulses per minute reads 35000 rpm two bladed propeller Multiply rpm reading 2/n correct number blades propeller using single-bladed propeller multiply number indicated fac tor 2/1 op has three blades multiply indicated number 24 prop has four blades multiply indication 2/4 dangerous contact rotating machin ery necessary new remote optical probe fits through 1 A-in-diameter hole may simplify some measurement want make open probe remove sensor will have hand tiny device can built directly plane looking directly ducted fan spinner instance sensor alone fits -in -diameter hole its mount A-in hole ran little test find operating light lev els rpm measurements Using Minolta Flashmeter III lux-meter propeller mounted shaft drill motor test object minimum required illumination about 10 lux Thats too dark flying couldnt find maximum value daylight making measurements learned have careful about shadows reflections sensor can see meter will indicate value thats too high Milliammeter panel marked Amp meter dicates directly milliamps range interest RCers ammeter limited Amps because internal circuitry set up wayand because 3-digit dis play limited 1999 counts ICs notoriously intolerant overloads Bob Aberles suggestion made red lead fused ammeter lead inserting Radio Shack Inline Mini Fuse Holder #270-1238 used two-amp fuses #270-12 increases insertion resistance about 14 ohm may too much some tests its handy Ive already blown couple fuses Accu Continued page 132 April 1988 33 AL L PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS OFF tUT Ills unique device tor cutting nign quaiity warn wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package*8750 plus $3 shipping handling 24 Volt Variable Output Power Supply$5250 piua *3 ahipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings 4 $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road MS$VCWd Wichita Falls TX 76310 Tel 817 692-4475 proud announce TATONE PRODUCTS CORPORATION HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GATOR RIC PRODUCTS An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area- 860 sq Complete Delux KitSI 5995 TIGER TAIL 4S DELUX ALL BALSA KIT PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters Included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia 25 895 t/diax25 995 diax3S1495 feather Ilte glass cloth 7 az/sq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull sight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Bearing Puller5 695 Bothpor51395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out tool complete instrutnons log trimming out airplane quality book carrying caseS 795 NEWI WING MOUMING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included S 595 READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40 Piper Gherokee-25 Fokker E111-40 Fancy Stick-25 Cessna 172-20 engine included Zh SUNSHINE HOBBY 17721 South Western Avenue Gardena California 90247 Check free movement controls set up throws Covering Following usual practice used transparent MonoKote Cal sug gested lightweight silk tissue however model certainly would delightful covered silk new iron-on fab rics transparent colors would also viable alternative sprayed Poly U trim over Mono Kote light rubbing 000-grade steel wool aids adhesion preference Sig Stripe Rite masking Brushing coat Sig clear Skybrite great preventing bleeders also used Stripe Rite pin stripes letters vinyl stick-on ones office supply store Banner wheels used prototype certainly add appearance points used samples new hinge material model recommend Klett Sig pinned hinges safeguard drill hole insert small piece toothpick securing CyA covered Sportwagon RC equipment place hadnt done way quite some time really simpler easier effort Cut window holes out shrunken MonoKote Cut window plastic out line over plans using Wilhold RC 56 ad hesive secure windows inside frame windscreen will need trimmed slightly good fit Position inside ply rear onto tiny cut outs MonoKote Stripe Rite tape used joint primed tank engine compart ments Skybrite painted Poly U Flying Remember used fly sport Free Flight dream day wed able make turn back land feet Want bet thought went around Cal Smiths mind 1948 Well golly 37 years later can know some purists detest contra diction term what have RC-assisted Free Flight incarna tion Cals sexy little Free Flight gets fly around merrilyand get watch giving occasional directional changes $12999 $9599 $11999 $6999 $9999 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT 168 MIXING CUPS ground Point nose wind advance power up away goes radio may needed slight course corrections might change elevator bit adjust rate climb keep soaring too high flies adjust chugging around looking pretty re alistic air isnt what youre after use Sportwagon practice maneuvers like stall turns yes lazy loops model has excellent versatility Cal Smith did homework well Men Cal Smiths extraordinary gifts energy dont come along very often Artist author model designer Cal sort Renaissance man model avia tion closing 1969 tribute Model Airplane News excerpted above Bill Win ter declared Forgotten Cal will never hope updating Sportwagon will help keep memory its designer alive Radio Technique/Myers Continued page 33 Tach 2 still works must good idea Thanks Bob Making use idea presented column back October 79 Accu-Tach 2 handbook suggests used evaluate RC system installation cut battery lead aileron adapter cable con nect cut ends milliamoneter like Accu Tach 2 Put adapter between flight pack switch harness Turn transmitter receiver observe current being drawn try control its extreme position trim available same extreme can stall servo position will see amps jump way up stay up warning reset throttle stop clear epoxy out binges make additional clear ance pushrods etc can put modi fied aileron extender cable between servo receiver evaluate particular servo instal lation problems may work system installation insertion resistance Accu Tach 2 oscillator strobes display may drive system instability happens youll have make measure ment analog VOM kind pointer using 500 mA range 132 Model Aviation unuu ruriurmance System TOP PERFORMANCE K&B ENGINES AkplaneMauine K&B FUELS168 GLOW PLUGS 9 Blends4 Choices See Dealer Order Direct Inciude S2 Per Item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 l 476-8639 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT
Edition: Model Aviation - 1988/04
Page Numbers: 32, 33, 132, 133
George M Mye 7Radiomchnque ABSTRACT Accu-Tach 2A review Applica tions discussed Light levels multiblade pro- pellers remote sensor shunt resistances ESV peak-detection charging OLD FRIEND REVISITED first reported Accu-Tach 2 February 1985 issue Model Aviation instrument com bines digital voltmeter ammeter tachome ter light handy package Accu-Tach 2 has provided excellent service three years essential part field kit manufacturer device now Norcal Avionics Div A-B Tech Inc 5689 Glasgow Troy MI 48098 telephone 313 8288210 Accu-Tach 2A adds remote tachometer probe clip leads handy zipper pouch catalog couple labels have added de fine function Tachometer/Voltmeter se lector switch built-in tachometer sensor otherwise the Accu-Tach remains its old dependable self What follows may sound little familiar have read remember previous columns know some people because made purchase recently San Antonio Hob Shop Palo Alto CA live NY Shawn Berkheimer looked name travelers check asked still have metal detector get use both surprised flattered Shawn referring TOTO OR-AMP COM BAT TE RY WI REJ picture page 28 of September 1982 issue MA five years ago am search ing lawn needle valve Heli copter engine Accu-Tach 2A has LCD display uses big x /2-in numbers display values between 1999 numbers can read 450 off per pendicular directions Settling time reading four five seconds before Accu-Tach 2A will following 1 Measure DC voltage VDC autopolarity unloaded Shunt resis tance 506k ohms range ade quate diagnosing troubles kinds likely encount ered transmitters receivers servos avoiding FET cir cuits Usable 12 VDC starter batteries nickle-cadmium battery packs contain ing up 13 cells use check things automobile also readout cen Heres modify aileron extender cable can use ammeterlike Accu-Tach 2 instanceto check much current airborne system drawing Its great help checking stalled servos binding hinges Read tiVolts 1 cV V Add zero inter pret display millivolts 1000 mV lt 2Measure rpm 35000 rpm optically light levels above 10 lux range sufficient electric alcohol- gasoline-fueled engines used power model airplanes scale direct reading must add zero x 10 scale two zeros x 100 scale get rpm 3Measure DC current 1999 ADC REMOTE SENSOR SOCKET \ TACHOMETER OFF______ VOLT/AMPACCU-TACH 2A METER x Volt Amp Tx Corn t1999 CENTI VOLTS DC 199 9 MILLI AMPS DC HIGH-CURRENT ADAPTER FOR ESV ESV COMMON LEAD FOR MEASUREMENTS TX& RPM /10 rJ RX& RPM/1O sketch identifies input connections Accu-Tach 2a Newest version Accu-Tach 2 L comes neat carrying case *nd auxiliary tachometer probe Myers finds device Indis pensible addition field kitalso good some jobs car innards tech probe look like R Some interesting potential uses naked sensor include building ducted-fan model ease checking fan rpm Column addresses uses meter 32 Model Aviation 70 Froehlkh Farm Rd HIckaville NY 11801 autopolarity reading milliamps measuring voltage drop across meter current running through t calculated series insertion / ohm 5% range nicely fits kinds RC uses such measuring charging discharging currents typical transmitters servos battery packs full RC systems will nor measure currents typical electric starters propulsion motors 4 Expanded-scale voltmeter VDC autopolarity testing batteries Built-in switch-selected load resistors RX po sition hms TX position hms pro duce nominal 240 mA load good test value usual AA pencell nickle-cadmium batteries found RC systems Indicates centivolts 1 cV V Lets look some applications Tachometer Push switch located left side case towards tachometer eye top case point eye towards whirling propeller keeping six-inch clearance read rpm An accessory probe plugs side case situations cant easily see numbers instrument position make measurement Two measuring ranges provided x 10 x 100 have add either two zeros reading counter works 70000 pulses per minute reads 35000 rpm two bladed propeller Multiply rpm reading 2/n correct number blades propeller using single-bladed propeller multiply number indicated fac tor 2/1 op has three blades multiply indicated number 24 prop has four blades multiply indication 2/4 dangerous contact rotating machin ery necessary new remote optical probe fits through 1 A-in-diameter hole may simplify some measurement want make open probe remove sensor will have hand tiny device can built directly plane looking directly ducted fan spinner instance sensor alone fits -in -diameter hole its mount A-in hole ran little test find operating light lev els rpm measurements Using Minolta Flashmeter III lux-meter propeller mounted shaft drill motor test object minimum required illumination about 10 lux Thats too dark flying couldnt find maximum value daylight making measurements learned have careful about shadows reflections sensor can see meter will indicate value thats too high Milliammeter panel marked Amp meter dicates directly milliamps range interest RCers ammeter limited Amps because internal circuitry set up wayand because 3-digit dis play limited 1999 counts ICs notoriously intolerant overloads Bob Aberles suggestion made red lead fused ammeter lead inserting Radio Shack Inline Mini Fuse Holder #270-1238 used two-amp fuses #270-12 increases insertion resistance about 14 ohm may too much some tests its handy Ive already blown couple fuses Accu Continued page 132 April 1988 33 AL L PURPOSE FOAM CUTTER Hands Off Cut ii Especially Designed Tapered Wings HANDS OFF tUT Ills unique device tor cutting nign quaiity warn wing cores hands off also cuts both sides same time Most modelers will amazed high quality smooth surface will achieve using device plus added advan tage having wait until friends can come around help However just foam wing cutter HANDS OFF also capable cutting precision foam com ponents such fuselage sections cowls tail surfaces HANDS OFF available hardware package assemble own board HANDS OFF CUT II requires 24 volt variable output power supply Easy assemble takes approximately 15 minutes Dealers WantedHands Off Cut II Hardware Package*8750 plus $3 shipping handling 24 Volt Variable Output Power Supply$5250 piua *3 ahipping handling New 1 hr Video Tape Foam Shop Part 1 ing Foam Wings 4 $2995 NOR-RAY PRODUCTS INC 5008 Sandbeach Road MS$VCWd Wichita Falls TX 76310 Tel 817 692-4475 proud announce TATONE PRODUCTS CORPORATION HAS MOVED INTO LARGER QUARTERS 21658 Cloud Way Hayward CA 94545 CAL 415 783-4868 Out CAL 800 482-8663 has acquired CB ASSOCIATES PRESIDENT TATONE PRODUCTS CORP GATOR RIC PRODUCTS An new Tiger Tail 120 four strokes piped 60 two strokes beautiful performer competition just showing offl balsa kit machined wood parts complete hardware package includes plug-in adjustable stab parts new wing mounts Wing Span -72 inWing Area- 860 sq Complete Delux KitSI 5995 TIGER TAIL 4S DELUX ALL BALSA KIT PLUG-IN ADJUSTABLE STAB KIT last can optimize stab incidence best flight charac teristics pair glass filled nylon adjusters Included provide micro screw adjustment smaller front tube Main tube aluminum matching phenolic socket TRANSMITTER CASE An inexpensive rugged molded case protect expensive transmitter both two stick single stick transmitters Brown leather grain aluminum trim locking clasp S 1895 WING TUBE & SOCKETS Aluminum alloy tubing plug-in wings Included pair special slip-fit phenolic sockets build wing structure Now size models 718 dia 25 895 t/diax25 995 diax3S1495 feather Ilte glass cloth 7 az/sq yd est weave Fastest Filling test Finished Weight Big 3 Sq Yard Pkg Detailed Instructions S895 ENGINE SLEEVE & BEARING PULLER Pull sight sleeves bearings easily out damage new 60s 17MM rear bearings Sleeve Puller5 795 Bearing Puller5 695 Bothpor51395 IVANS MAGIC GADGET protractor device used Ivan Kristensen accurately measure aileron elevator rudder throw Takes guess work out tool complete instrutnons log trimming out airplane quality book carrying caseS 795 NEWI WING MOUMING SET wing mounting system developed Ron Chidgey fast neat accurate stays tight Three nylon brackets screws machined wood wing blocks included S 595 READY TO FLY Call 1-800-45-TO FLY *LOW PRICES *EASY TO ASSEMBLE *NO BUILDING *NO PAINTING Piper Cherokee-40 Piper Gherokee-25 Fokker E111-40 Fancy Stick-25 Cessna 172-20 engine included Zh SUNSHINE HOBBY 17721 South Western Avenue Gardena California 90247 Check free movement controls set up throws Covering Following usual practice used transparent MonoKote Cal sug gested lightweight silk tissue however model certainly would delightful covered silk new iron-on fab rics transparent colors would also viable alternative sprayed Poly U trim over Mono Kote light rubbing 000-grade steel wool aids adhesion preference Sig Stripe Rite masking Brushing coat Sig clear Skybrite great preventing bleeders also used Stripe Rite pin stripes letters vinyl stick-on ones office supply store Banner wheels used prototype certainly add appearance points used samples new hinge material model recommend Klett Sig pinned hinges safeguard drill hole insert small piece toothpick securing CyA covered Sportwagon RC equipment place hadnt done way quite some time really simpler easier effort Cut window holes out shrunken MonoKote Cut window plastic out line over plans using Wilhold RC 56 ad hesive secure windows inside frame windscreen will need trimmed slightly good fit Position inside ply rear onto tiny cut outs MonoKote Stripe Rite tape used joint primed tank engine compart ments Skybrite painted Poly U Flying Remember used fly sport Free Flight dream day wed able make turn back land feet Want bet thought went around Cal Smiths mind 1948 Well golly 37 years later can know some purists detest contra diction term what have RC-assisted Free Flight incarna tion Cals sexy little Free Flight gets fly around merrilyand get watch giving occasional directional changes $12999 $9599 $11999 $6999 $9999 Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT 168 MIXING CUPS ground Point nose wind advance power up away goes radio may needed slight course corrections might change elevator bit adjust rate climb keep soaring too high flies adjust chugging around looking pretty re alistic air isnt what youre after use Sportwagon practice maneuvers like stall turns yes lazy loops model has excellent versatility Cal Smith did homework well Men Cal Smiths extraordinary gifts energy dont come along very often Artist author model designer Cal sort Renaissance man model avia tion closing 1969 tribute Model Airplane News excerpted above Bill Win ter declared Forgotten Cal will never hope updating Sportwagon will help keep memory its designer alive Radio Technique/Myers Continued page 33 Tach 2 still works must good idea Thanks Bob Making use idea presented column back October 79 Accu-Tach 2 handbook suggests used evaluate RC system installation cut battery lead aileron adapter cable con nect cut ends milliamoneter like Accu Tach 2 Put adapter between flight pack switch harness Turn transmitter receiver observe current being drawn try control its extreme position trim available same extreme can stall servo position will see amps jump way up stay up warning reset throttle stop clear epoxy out binges make additional clear ance pushrods etc can put modi fied aileron extender cable between servo receiver evaluate particular servo instal lation problems may work system installation insertion resistance Accu Tach 2 oscillator strobes display may drive system instability happens youll have make measure ment analog VOM kind pointer using 500 mA range 132 Model Aviation unuu ruriurmance System TOP PERFORMANCE K&B ENGINES AkplaneMauine K&B FUELS168 GLOW PLUGS 9 Blends4 Choices See Dealer Order Direct Inciude S2 Per Item UPS GATOR RIC PRODUCTS 3713 Pompano Dr acola FL 32514 l 476-8639 Centivoitmeter meter indicates centivolts what else would call meter shows 478 cV battery pack has terminal voltage 478 volts Id happier front panel marked cV instead Volts Either automatic decimal point should have provided Since Accu-Tach 2 indicates numbers small 10 mV can use Peak De tection Charging nickle-cadmium batteries set up charging rate will get job done 15 minutes watch battery terminal voltage see volt age rise above expected value drop two centivolts below what few seconds before charging complete must caution overcharging high rate can ruin battery must pay tention what doing should battery pack cool touch pack will get quite warm during charging should never get hot gets hot stays hot know youve just junked battery pack mix/match crowd can mea sure control pulses coming out receiver determine positive- negative-going can determine whether use some substitute servos Connect Common lead battery Negative Connect Positive Volts lead signal lead coming out receiver Push pin through servo pigtail necessary Now voltage shows about 25 cV looking positive-going pulses reads about 380 CV have negative-going pulses very rare Expanded-Scale Voltmeter Im sure people will use built-in resistors battery tests because thats con venient way using some unusu al battery size some alternatives available flight pack has less capacity usual such SR300 packs recommended Top Flite Wristocat put scale switch TX position current drawn pack will about 120 mA External shunts can fitted produce higher discharge currents would want customary discharge-test nickle-cadmium batteries rate equal one-half batterys rating example want test 1200 mAh flight pack discharging rate 600 mA should last two hours before terminal voltage drops 44 VDC other sizes packs consult following table find resistor can connected GR plug shunt RXTX COM ShuntResistor1011/lOw2012/lOw5011/lOw10012/lOw Radio Shack #271-1322 series271-1332 series Type cells RX1200 utAh900 mAh650 mAhna TX2400 mAh1200 mAk900 mAh650 utAh Note Shant resistors will get hot Gee Bee/Haffke Continued page 41 el reacts controls positively gently docile air will about thing care try will flying Gee Bee Scale competition will glad share documentation material Write list available photos Model Y variants Henry Hafjke 1038 W Elmer Road Vineland NJ 08360 RC Aerobatics/Van Putte Continued page 43 MK Curare 40 Rhom retracts pow ered piped 05 46 VF rear-exhaust engine Hes building MK Arrow 40 46 VF up front winter wants know advantage running 9 x 6 three-bladed prop 46 VF compared Master Airscrew 10 x 7 Ive running rpm going burn motor Out require lower-nitro fuel use 15%-nitro fuel honest real advantage Ive found using three-blade props lower prop diameter buys extra ground clearance really high-revving engines like 46 VF prop blade can actually operating wake blade ahead thereby reducing its efficiency right three-blade prop will often give same performance proper twoblade prop dont expect major surge power may Clarence Lee dont foresee engine burnout problem need try lower-nitro fuel However 15% fuel must cost bundle Ive using 5% years havent really noticed much loss power Torn goes does determine proper length tuned pipe April 1988 133 RAPIER 40-60 MADE IN THE USA PICAS CHALLENGE RAPIER CUTS THROUGH THE COMPETITION WITH 752 sq 1Advanced building technology57 2Straight forward all-balsa construction48 3Clear detailed instructions 45-6 lbs Full size plans40-60 2c 5Superb flight characteristics60-90 4c [v33][b-1-10-1-10]]Aa0 Wing Area Wing Span Fuse Length Functions Weight Engine Size SAFE FLYING IS NO ACCIDENT