IIGeorgeMMyers OLD EQUIPMENT month some approaches obsolete piece equipment conversation usually starts description bow unit has just destroyed another fine airplane continues tales equip ment has back manufacturer six times doesnt work better now did first bought Additional models described snuffed out same system Finally get punch line manu facturer has gone out business Can fix standard advice follows First carefully unsolder crystal cut off pigtails servos holding receiver its antenna least six inches receiver case place re ceiver flat piece concrete Finally using 12-ounce carpenters hammer smash three times wont tempted use After initial giggle usual re action anger Obviously have too much money enough sense Actually Im pragmatist Modern equipment much better stuff produced ten years ago no justi fication trying fix old stuff way example older equipment particularly single-channel reed types 27-MHZ channels made extensive use canned german ium transistors 27 MHZ completely unsafe model airplanes face numerous citizen-band outlaws oper ating band Im lawyer seems model airplane 27 MHZ injured someone complain tant could make pretty good case charging contributory negligence part operator knowingly operated dangerous piece equipment presence widely known understood factors could cause loss control Thats gave up 27 MHZ aircraft years ago other hand seems quite adequate boats cars operate earths surface shielded somewhat above outlaws Germanium transistors once prized fact consumed 25% power silicon transistors putting inside cans supported welded leads made very open damage vibration shock Thats reasons old sets need repaired often Todays construction technique wherein silicon chip encapsulated epoxy almost immune shock vi bration Integrated circuits now widely used improve situation encapsulating some resistors capacitors used stand alone circuit board easily damaged Finally price engines balsa kits supplies has rising steadily cost good radios has falling 16 Model Aviation 4 Charles H Stumpf treasurer Grumman Model Aviation Society finds ST 23-powered Rebel fine lunchtime flier makes three four flights company-owned flying field Speaking routing antennas Ken Willard ran tiny bipe up top wing back tip tail out wing tip simply ran out airplane can no longer atiord unreliable radios Putting doubtful radio new airplane like putting old worn-out tires 1978 car Actually problem memory keep remembering price paid equipment should looking cost next crash will cause put money hobby could learn fly cant learning flying broken equipment Discard obsolete stuff would worn-out pair shoes get fun flying previous sermon has left some people unsatisfied Sometimes need new servo-motor batteries plugs switches other bits hardware does get best sources today RC kit manufacturers some addresses outline what can get ACE R/C Inc Box 511 116 W 19th St Higginsville MO 64037 Resistors capacitors transistors servo-motors plugs servo parts lines service Royal Electronics Corp 3535 5 Irving Englewood CO 80110 Same supplies ACE R/C different lines really should write both above manufacturers obtain catalogs before placing order Men tion name Once have catalog its usually quite easy find what want Another source supply Heathkit case have find what want parts list kits means either borrow manual someone has must make trip retail stores can study manual files didnt have practically back yard Heath equip ment didnt have things common Kraft probably wouldnt bother Heath Company Benton Harbor MI 49022 electronics parts houses have vir tually abandoned RC source busi ness wouldnt waste time Within limits can mix components RC systems various manu facturers Royal example lists servo-amplifiers catalog compatible specifically-named manu facturers such Kraft Pro-Line Heath Royal various Japanese sets ACE R/C describes necessary adjustments modifications lines pur pose adapting other manufacturers products have discussed previous columns some limitations such pulse polarity neutral pulse-width 3- 4- 5-wire systems etc Transmitters In general can drive flight pack transmitter same frequency some limi Con tinued page 87 3 /09 0 93I I0 MAN RA Ti AIC 48V0C PACI / February 1978 17 S. 2o3oEo5bGo7oaoqoico to/203oIva MJLLa q*fiERE5 Fig 1 Handy guide estimating charging time mixing various manufacturers equipment Ron Farkas president Suffolk NY Wings covered Enys 45-powered from-kit Wayfarer yellow blue Monokote flies quite comfortably power concentrate put less effort money trying perfect liquidcooled in-lines lower weight re duced maintenance first partly can celled out greater drag radial NACA developed its clean round cowling became possible build radial-engined planes fast in-line brothers still being demonstrated Reno Air Races Bearcats have won twice races Mustangs Wright J-5 R-790 won pres tigious Collier Trophy its makers 1927 soon led R-975 used some Beech Staggerwings prede cessor AT-6 R-1820 Cyclone used B-25 finally R-3350 used B-29 Constellation original J-5 bore 4 stroke 5/2 weight 508 lbs compression ratio 52 1 developed its 200 hp 1800 rpm Along immensely popular line radial engines 1920s 1930s some considerably less well known some cases radical designs nevertheless made own con tributions history devices make propellers go around airplanes go forward include barrel cam engines sleeve-valve designs lat ter British speciality Bristol engines type used thousands RAF bombers style piston engine has long used road vehicles brief success airplanes diesel After considerable experience German dirigibles tried airplanes Packard built good enough set non-refueling duration record 84 hours Ger mans brought diesel its greatest point Junkers Jumo 6-cylinder verticallyopposed water-cooled diesel used some extent pre-war airliners tracted attention powering Ju-86P high-altitude spy plane during early days World War II took spe cial model Spitfire climb above 40000 feet oil-burner working unmolested end line compression-ignition engine airplanes high-compres sion gasoline engine passed Jumo supercharging developed 750 hp 1800 rpm weighed 1650 lbs supercharging put out 1200 hp 3000 rpm other piston engines devel oped during period played ma jor roles story aircraft propulsion today gas turbine seems dominant tens thou sands being built Continental Ly coming year dozen herein described seem have played vital roles progress power few rattling horsepower thousands smooth dependable horses made airr 3 epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction insllation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass layup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Painting Pointers brochure Write word glue request HOIhYPUNY PRODUCTS planes useful Radio Technique/Myers continued page 17 tions cannot mix encoding schemes such old single-channel pulse scheme reed systems modern digital proportional Variant another sys tem works its own transmitter/ receiver combinations total number channels transmitter has within two three number receiver can have trouble reset pulse wasted some time trying operate 2-channel receiver 6-channel trans mitter speak experience Division Pettit Paint Co Inc 25 Pine Street Rockaway NJ 07866 Another problem area can neu tral-pulse time new Kraft KP-4A system components interchange able other Kraft systems primarily because use l7ms neutral instead customary 1 5ms also moved wires Multicon connector servos cant connected plugged wrong receiver Receivers Subject discussion above can exchange receivers among various systems primary difficulty will plugs set plugs make necessary adapters 4-channel system will cost 7 10 dollars forced cut up aileron extender cables $3 apiece its Remember youll need February 1 978 87 five adapters 4-channel system order accommodate battery Servos Weve already mentioned neutral pulses plugs leaves mount ing hardware various dimensions servos problem start mixing systems may also have contend 3- 4- 5-wire systems Battery Packs Switch Harnesses Plugs main problem ChargersPlugs again addition must consider charging current have discussed previous columns really should insert milliammeter measure what get mix sys tems estimate time required reach full charge using Fig 1 people flying mixed collection parts flight pack quite well sons Sunfli 4-20 case point flight pack con sists Royal 2-ch receiver up graded four channels MA 9/77 pp 12 13 etc powered Kraft KB-4M battery pack through home-made switch harness servo group consists following Cox/Sanwa items Throttle 80322 miniature Aileron Elevator 80312 large regular Rudder/Nosewheel 80306 large waterproof transmitter Cox/Sanwa 8060 although used Kraft series 72 transmitter first plane has about 75 flights over fivemonth period has always worked perfectly Oh yes usually charge flight pack ACE R/C metered varicharger Go ahead mix up know works See trade shows hope get ideas future columns George M Myers 70 Froeblich Farm Rd Hicks vale NY 11801 R C Aerobatics/Van Putte continued page 25 property damage discussed battery charge situation Bill Johnston owner Kraft South east Bill told charges BLACK TO 4Sv PACK batteries six hours after days flying puts charge system timer charges batteries hour day solved problem different way purchased several older style Kraft chargers have separate pilot lights receiver transmitter bat tery packs high-rate configuration GE 1815 1816 bulb used re ceiver transmitter respectively ever both bulbs replaced GE 1820 bulbs charger becomes lowrate charger Now charge batteries night did before dont have worry about damaging batteries may want check radio manufacturer regarding modifications charge instructions have radio other Kraft nickel-cadmium batteries too expen sive spoil improper charging found out hard way year seems report unusual events happened latest New leans contest always manage come up something strange like night flying 1975Buzzard Bomb-shell flown miniature flashlights railroad flares weird bomb drops 197613 sort-of-fresh eggs dropped air plane special bomb bay year no exception Dave Constant Tom Golson put flying demonstrations during breaks pattern flying matched Sure-Flite Products Piper 1-3 airplanes 1-3 all-foam airplane requires little installation engine radio system plus some paint ready fly definitely sophisticated air planes Dave Tom put im pressive displays formation maneuvers Saturday Tom followed up night flights airplane using chemical flare wing two small flash lights other wing next day pair fooled spectators hav ing Dave supposedly perform spectacular flights both airplanes same time using transmitter Tommy carefully hidden crowd sec ond transmitter proceeded top WHITE 4-wire servos RED RED K _ RiR4R3TO SERVO 748514 TI R2ICi33 1C2C2 JL ORANGE 4 62171 -w -4 I2OMA 3 WIRE SERVO MOTOR CHECK guys wrote phoned schematic Hugh Shoemaker servo tester omitted December issue thousand pardonsand too Ron 88 Model Aviation Designeo expressiy 2 channel R/C plenty room just $2 about R/C up 4 channel miniature units Maintaining top quality simple construction inverted gull wing Balsa Plywood parts accurately die-cut Hardware Package including RIC III Hardware full-size stepbystep Plans flat finish Decal sheet Major Gregory Pappy Boyingtons Lulubelle appeared after Oct 17 1943 raid Kahili Airfield Solomons Recommended engine sizes maximum performance 09 10 Minimal performance achieved stock 049 051 Tee Dee Diesel ested
Edition: Model Aviation - 1978/02
Page Numbers: 16, 17, 87, 88
IIGeorgeMMyers OLD EQUIPMENT month some approaches obsolete piece equipment conversation usually starts description bow unit has just destroyed another fine airplane continues tales equip ment has back manufacturer six times doesnt work better now did first bought Additional models described snuffed out same system Finally get punch line manu facturer has gone out business Can fix standard advice follows First carefully unsolder crystal cut off pigtails servos holding receiver its antenna least six inches receiver case place re ceiver flat piece concrete Finally using 12-ounce carpenters hammer smash three times wont tempted use After initial giggle usual re action anger Obviously have too much money enough sense Actually Im pragmatist Modern equipment much better stuff produced ten years ago no justi fication trying fix old stuff way example older equipment particularly single-channel reed types 27-MHZ channels made extensive use canned german ium transistors 27 MHZ completely unsafe model airplanes face numerous citizen-band outlaws oper ating band Im lawyer seems model airplane 27 MHZ injured someone complain tant could make pretty good case charging contributory negligence part operator knowingly operated dangerous piece equipment presence widely known understood factors could cause loss control Thats gave up 27 MHZ aircraft years ago other hand seems quite adequate boats cars operate earths surface shielded somewhat above outlaws Germanium transistors once prized fact consumed 25% power silicon transistors putting inside cans supported welded leads made very open damage vibration shock Thats reasons old sets need repaired often Todays construction technique wherein silicon chip encapsulated epoxy almost immune shock vi bration Integrated circuits now widely used improve situation encapsulating some resistors capacitors used stand alone circuit board easily damaged Finally price engines balsa kits supplies has rising steadily cost good radios has falling 16 Model Aviation 4 Charles H Stumpf treasurer Grumman Model Aviation Society finds ST 23-powered Rebel fine lunchtime flier makes three four flights company-owned flying field Speaking routing antennas Ken Willard ran tiny bipe up top wing back tip tail out wing tip simply ran out airplane can no longer atiord unreliable radios Putting doubtful radio new airplane like putting old worn-out tires 1978 car Actually problem memory keep remembering price paid equipment should looking cost next crash will cause put money hobby could learn fly cant learning flying broken equipment Discard obsolete stuff would worn-out pair shoes get fun flying previous sermon has left some people unsatisfied Sometimes need new servo-motor batteries plugs switches other bits hardware does get best sources today RC kit manufacturers some addresses outline what can get ACE R/C Inc Box 511 116 W 19th St Higginsville MO 64037 Resistors capacitors transistors servo-motors plugs servo parts lines service Royal Electronics Corp 3535 5 Irving Englewood CO 80110 Same supplies ACE R/C different lines really should write both above manufacturers obtain catalogs before placing order Men tion name Once have catalog its usually quite easy find what want Another source supply Heathkit case have find what want parts list kits means either borrow manual someone has must make trip retail stores can study manual files didnt have practically back yard Heath equip ment didnt have things common Kraft probably wouldnt bother Heath Company Benton Harbor MI 49022 electronics parts houses have vir tually abandoned RC source busi ness wouldnt waste time Within limits can mix components RC systems various manu facturers Royal example lists servo-amplifiers catalog compatible specifically-named manu facturers such Kraft Pro-Line Heath Royal various Japanese sets ACE R/C describes necessary adjustments modifications lines pur pose adapting other manufacturers products have discussed previous columns some limitations such pulse polarity neutral pulse-width 3- 4- 5-wire systems etc Transmitters In general can drive flight pack transmitter same frequency some limi Con tinued page 87 3 /09 0 93I I0 MAN RA Ti AIC 48V0C PACI / February 1978 17 S. 2o3oEo5bGo7oaoqoico to/203oIva MJLLa q*fiERE5 Fig 1 Handy guide estimating charging time mixing various manufacturers equipment Ron Farkas president Suffolk NY Wings covered Enys 45-powered from-kit Wayfarer yellow blue Monokote flies quite comfortably power concentrate put less effort money trying perfect liquidcooled in-lines lower weight re duced maintenance first partly can celled out greater drag radial NACA developed its clean round cowling became possible build radial-engined planes fast in-line brothers still being demonstrated Reno Air Races Bearcats have won twice races Mustangs Wright J-5 R-790 won pres tigious Collier Trophy its makers 1927 soon led R-975 used some Beech Staggerwings prede cessor AT-6 R-1820 Cyclone used B-25 finally R-3350 used B-29 Constellation original J-5 bore 4 stroke 5/2 weight 508 lbs compression ratio 52 1 developed its 200 hp 1800 rpm Along immensely popular line radial engines 1920s 1930s some considerably less well known some cases radical designs nevertheless made own con tributions history devices make propellers go around airplanes go forward include barrel cam engines sleeve-valve designs lat ter British speciality Bristol engines type used thousands RAF bombers style piston engine has long used road vehicles brief success airplanes diesel After considerable experience German dirigibles tried airplanes Packard built good enough set non-refueling duration record 84 hours Ger mans brought diesel its greatest point Junkers Jumo 6-cylinder verticallyopposed water-cooled diesel used some extent pre-war airliners tracted attention powering Ju-86P high-altitude spy plane during early days World War II took spe cial model Spitfire climb above 40000 feet oil-burner working unmolested end line compression-ignition engine airplanes high-compres sion gasoline engine passed Jumo supercharging developed 750 hp 1800 rpm weighed 1650 lbs supercharging put out 1200 hp 3000 rpm other piston engines devel oped during period played ma jor roles story aircraft propulsion today gas turbine seems dominant tens thou sands being built Continental Ly coming year dozen herein described seem have played vital roles progress power few rattling horsepower thousands smooth dependable horses made airr 3 epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction insllation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass layup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Painting Pointers brochure Write word glue request HOIhYPUNY PRODUCTS planes useful Radio Technique/Myers continued page 17 tions cannot mix encoding schemes such old single-channel pulse scheme reed systems modern digital proportional Variant another sys tem works its own transmitter/ receiver combinations total number channels transmitter has within two three number receiver can have trouble reset pulse wasted some time trying operate 2-channel receiver 6-channel trans mitter speak experience Division Pettit Paint Co Inc 25 Pine Street Rockaway NJ 07866 Another problem area can neu tral-pulse time new Kraft KP-4A system components interchange able other Kraft systems primarily because use l7ms neutral instead customary 1 5ms also moved wires Multicon connector servos cant connected plugged wrong receiver Receivers Subject discussion above can exchange receivers among various systems primary difficulty will plugs set plugs make necessary adapters 4-channel system will cost 7 10 dollars forced cut up aileron extender cables $3 apiece its Remember youll need February 1 978 87 five adapters 4-channel system order accommodate battery Servos Weve already mentioned neutral pulses plugs leaves mount ing hardware various dimensions servos problem start mixing systems may also have contend 3- 4- 5-wire systems Battery Packs Switch Harnesses Plugs main problem ChargersPlugs again addition must consider charging current have discussed previous columns really should insert milliammeter measure what get mix sys tems estimate time required reach full charge using Fig 1 people flying mixed collection parts flight pack quite well sons Sunfli 4-20 case point flight pack con sists Royal 2-ch receiver up graded four channels MA 9/77 pp 12 13 etc powered Kraft KB-4M battery pack through home-made switch harness servo group consists following Cox/Sanwa items Throttle 80322 miniature Aileron Elevator 80312 large regular Rudder/Nosewheel 80306 large waterproof transmitter Cox/Sanwa 8060 although used Kraft series 72 transmitter first plane has about 75 flights over fivemonth period has always worked perfectly Oh yes usually charge flight pack ACE R/C metered varicharger Go ahead mix up know works See trade shows hope get ideas future columns George M Myers 70 Froeblich Farm Rd Hicks vale NY 11801 R C Aerobatics/Van Putte continued page 25 property damage discussed battery charge situation Bill Johnston owner Kraft South east Bill told charges BLACK TO 4Sv PACK batteries six hours after days flying puts charge system timer charges batteries hour day solved problem different way purchased several older style Kraft chargers have separate pilot lights receiver transmitter bat tery packs high-rate configuration GE 1815 1816 bulb used re ceiver transmitter respectively ever both bulbs replaced GE 1820 bulbs charger becomes lowrate charger Now charge batteries night did before dont have worry about damaging batteries may want check radio manufacturer regarding modifications charge instructions have radio other Kraft nickel-cadmium batteries too expen sive spoil improper charging found out hard way year seems report unusual events happened latest New leans contest always manage come up something strange like night flying 1975Buzzard Bomb-shell flown miniature flashlights railroad flares weird bomb drops 197613 sort-of-fresh eggs dropped air plane special bomb bay year no exception Dave Constant Tom Golson put flying demonstrations during breaks pattern flying matched Sure-Flite Products Piper 1-3 airplanes 1-3 all-foam airplane requires little installation engine radio system plus some paint ready fly definitely sophisticated air planes Dave Tom put im pressive displays formation maneuvers Saturday Tom followed up night flights airplane using chemical flare wing two small flash lights other wing next day pair fooled spectators hav ing Dave supposedly perform spectacular flights both airplanes same time using transmitter Tommy carefully hidden crowd sec ond transmitter proceeded top WHITE 4-wire servos RED RED K _ RiR4R3TO SERVO 748514 TI R2ICi33 1C2C2 JL ORANGE 4 62171 -w -4 I2OMA 3 WIRE SERVO MOTOR CHECK guys wrote phoned schematic Hugh Shoemaker servo tester omitted December issue thousand pardonsand too Ron 88 Model Aviation Designeo expressiy 2 channel R/C plenty room just $2 about R/C up 4 channel miniature units Maintaining top quality simple construction inverted gull wing Balsa Plywood parts accurately die-cut Hardware Package including RIC III Hardware full-size stepbystep Plans flat finish Decal sheet Major Gregory Pappy Boyingtons Lulubelle appeared after Oct 17 1943 raid Kahili Airfield Solomons Recommended engine sizes maximum performance 09 10 Minimal performance achieved stock 049 051 Tee Dee Diesel ested
Edition: Model Aviation - 1978/02
Page Numbers: 16, 17, 87, 88
IIGeorgeMMyers OLD EQUIPMENT month some approaches obsolete piece equipment conversation usually starts description bow unit has just destroyed another fine airplane continues tales equip ment has back manufacturer six times doesnt work better now did first bought Additional models described snuffed out same system Finally get punch line manu facturer has gone out business Can fix standard advice follows First carefully unsolder crystal cut off pigtails servos holding receiver its antenna least six inches receiver case place re ceiver flat piece concrete Finally using 12-ounce carpenters hammer smash three times wont tempted use After initial giggle usual re action anger Obviously have too much money enough sense Actually Im pragmatist Modern equipment much better stuff produced ten years ago no justi fication trying fix old stuff way example older equipment particularly single-channel reed types 27-MHZ channels made extensive use canned german ium transistors 27 MHZ completely unsafe model airplanes face numerous citizen-band outlaws oper ating band Im lawyer seems model airplane 27 MHZ injured someone complain tant could make pretty good case charging contributory negligence part operator knowingly operated dangerous piece equipment presence widely known understood factors could cause loss control Thats gave up 27 MHZ aircraft years ago other hand seems quite adequate boats cars operate earths surface shielded somewhat above outlaws Germanium transistors once prized fact consumed 25% power silicon transistors putting inside cans supported welded leads made very open damage vibration shock Thats reasons old sets need repaired often Todays construction technique wherein silicon chip encapsulated epoxy almost immune shock vi bration Integrated circuits now widely used improve situation encapsulating some resistors capacitors used stand alone circuit board easily damaged Finally price engines balsa kits supplies has rising steadily cost good radios has falling 16 Model Aviation 4 Charles H Stumpf treasurer Grumman Model Aviation Society finds ST 23-powered Rebel fine lunchtime flier makes three four flights company-owned flying field Speaking routing antennas Ken Willard ran tiny bipe up top wing back tip tail out wing tip simply ran out airplane can no longer atiord unreliable radios Putting doubtful radio new airplane like putting old worn-out tires 1978 car Actually problem memory keep remembering price paid equipment should looking cost next crash will cause put money hobby could learn fly cant learning flying broken equipment Discard obsolete stuff would worn-out pair shoes get fun flying previous sermon has left some people unsatisfied Sometimes need new servo-motor batteries plugs switches other bits hardware does get best sources today RC kit manufacturers some addresses outline what can get ACE R/C Inc Box 511 116 W 19th St Higginsville MO 64037 Resistors capacitors transistors servo-motors plugs servo parts lines service Royal Electronics Corp 3535 5 Irving Englewood CO 80110 Same supplies ACE R/C different lines really should write both above manufacturers obtain catalogs before placing order Men tion name Once have catalog its usually quite easy find what want Another source supply Heathkit case have find what want parts list kits means either borrow manual someone has must make trip retail stores can study manual files didnt have practically back yard Heath equip ment didnt have things common Kraft probably wouldnt bother Heath Company Benton Harbor MI 49022 electronics parts houses have vir tually abandoned RC source busi ness wouldnt waste time Within limits can mix components RC systems various manu facturers Royal example lists servo-amplifiers catalog compatible specifically-named manu facturers such Kraft Pro-Line Heath Royal various Japanese sets ACE R/C describes necessary adjustments modifications lines pur pose adapting other manufacturers products have discussed previous columns some limitations such pulse polarity neutral pulse-width 3- 4- 5-wire systems etc Transmitters In general can drive flight pack transmitter same frequency some limi Con tinued page 87 3 /09 0 93I I0 MAN RA Ti AIC 48V0C PACI / February 1978 17 S. 2o3oEo5bGo7oaoqoico to/203oIva MJLLa q*fiERE5 Fig 1 Handy guide estimating charging time mixing various manufacturers equipment Ron Farkas president Suffolk NY Wings covered Enys 45-powered from-kit Wayfarer yellow blue Monokote flies quite comfortably power concentrate put less effort money trying perfect liquidcooled in-lines lower weight re duced maintenance first partly can celled out greater drag radial NACA developed its clean round cowling became possible build radial-engined planes fast in-line brothers still being demonstrated Reno Air Races Bearcats have won twice races Mustangs Wright J-5 R-790 won pres tigious Collier Trophy its makers 1927 soon led R-975 used some Beech Staggerwings prede cessor AT-6 R-1820 Cyclone used B-25 finally R-3350 used B-29 Constellation original J-5 bore 4 stroke 5/2 weight 508 lbs compression ratio 52 1 developed its 200 hp 1800 rpm Along immensely popular line radial engines 1920s 1930s some considerably less well known some cases radical designs nevertheless made own con tributions history devices make propellers go around airplanes go forward include barrel cam engines sleeve-valve designs lat ter British speciality Bristol engines type used thousands RAF bombers style piston engine has long used road vehicles brief success airplanes diesel After considerable experience German dirigibles tried airplanes Packard built good enough set non-refueling duration record 84 hours Ger mans brought diesel its greatest point Junkers Jumo 6-cylinder verticallyopposed water-cooled diesel used some extent pre-war airliners tracted attention powering Ju-86P high-altitude spy plane during early days World War II took spe cial model Spitfire climb above 40000 feet oil-burner working unmolested end line compression-ignition engine airplanes high-compres sion gasoline engine passed Jumo supercharging developed 750 hp 1800 rpm weighed 1650 lbs supercharging put out 1200 hp 3000 rpm other piston engines devel oped during period played ma jor roles story aircraft propulsion today gas turbine seems dominant tens thou sands being built Continental Ly coming year dozen herein described seem have played vital roles progress power few rattling horsepower thousands smooth dependable horses made airr 3 epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction insllation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass layup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Painting Pointers brochure Write word glue request HOIhYPUNY PRODUCTS planes useful Radio Technique/Myers continued page 17 tions cannot mix encoding schemes such old single-channel pulse scheme reed systems modern digital proportional Variant another sys tem works its own transmitter/ receiver combinations total number channels transmitter has within two three number receiver can have trouble reset pulse wasted some time trying operate 2-channel receiver 6-channel trans mitter speak experience Division Pettit Paint Co Inc 25 Pine Street Rockaway NJ 07866 Another problem area can neu tral-pulse time new Kraft KP-4A system components interchange able other Kraft systems primarily because use l7ms neutral instead customary 1 5ms also moved wires Multicon connector servos cant connected plugged wrong receiver Receivers Subject discussion above can exchange receivers among various systems primary difficulty will plugs set plugs make necessary adapters 4-channel system will cost 7 10 dollars forced cut up aileron extender cables $3 apiece its Remember youll need February 1 978 87 five adapters 4-channel system order accommodate battery Servos Weve already mentioned neutral pulses plugs leaves mount ing hardware various dimensions servos problem start mixing systems may also have contend 3- 4- 5-wire systems Battery Packs Switch Harnesses Plugs main problem ChargersPlugs again addition must consider charging current have discussed previous columns really should insert milliammeter measure what get mix sys tems estimate time required reach full charge using Fig 1 people flying mixed collection parts flight pack quite well sons Sunfli 4-20 case point flight pack con sists Royal 2-ch receiver up graded four channels MA 9/77 pp 12 13 etc powered Kraft KB-4M battery pack through home-made switch harness servo group consists following Cox/Sanwa items Throttle 80322 miniature Aileron Elevator 80312 large regular Rudder/Nosewheel 80306 large waterproof transmitter Cox/Sanwa 8060 although used Kraft series 72 transmitter first plane has about 75 flights over fivemonth period has always worked perfectly Oh yes usually charge flight pack ACE R/C metered varicharger Go ahead mix up know works See trade shows hope get ideas future columns George M Myers 70 Froeblich Farm Rd Hicks vale NY 11801 R C Aerobatics/Van Putte continued page 25 property damage discussed battery charge situation Bill Johnston owner Kraft South east Bill told charges BLACK TO 4Sv PACK batteries six hours after days flying puts charge system timer charges batteries hour day solved problem different way purchased several older style Kraft chargers have separate pilot lights receiver transmitter bat tery packs high-rate configuration GE 1815 1816 bulb used re ceiver transmitter respectively ever both bulbs replaced GE 1820 bulbs charger becomes lowrate charger Now charge batteries night did before dont have worry about damaging batteries may want check radio manufacturer regarding modifications charge instructions have radio other Kraft nickel-cadmium batteries too expen sive spoil improper charging found out hard way year seems report unusual events happened latest New leans contest always manage come up something strange like night flying 1975Buzzard Bomb-shell flown miniature flashlights railroad flares weird bomb drops 197613 sort-of-fresh eggs dropped air plane special bomb bay year no exception Dave Constant Tom Golson put flying demonstrations during breaks pattern flying matched Sure-Flite Products Piper 1-3 airplanes 1-3 all-foam airplane requires little installation engine radio system plus some paint ready fly definitely sophisticated air planes Dave Tom put im pressive displays formation maneuvers Saturday Tom followed up night flights airplane using chemical flare wing two small flash lights other wing next day pair fooled spectators hav ing Dave supposedly perform spectacular flights both airplanes same time using transmitter Tommy carefully hidden crowd sec ond transmitter proceeded top WHITE 4-wire servos RED RED K _ RiR4R3TO SERVO 748514 TI R2ICi33 1C2C2 JL ORANGE 4 62171 -w -4 I2OMA 3 WIRE SERVO MOTOR CHECK guys wrote phoned schematic Hugh Shoemaker servo tester omitted December issue thousand pardonsand too Ron 88 Model Aviation Designeo expressiy 2 channel R/C plenty room just $2 about R/C up 4 channel miniature units Maintaining top quality simple construction inverted gull wing Balsa Plywood parts accurately die-cut Hardware Package including RIC III Hardware full-size stepbystep Plans flat finish Decal sheet Major Gregory Pappy Boyingtons Lulubelle appeared after Oct 17 1943 raid Kahili Airfield Solomons Recommended engine sizes maximum performance 09 10 Minimal performance achieved stock 049 051 Tee Dee Diesel ested
Edition: Model Aviation - 1978/02
Page Numbers: 16, 17, 87, 88
IIGeorgeMMyers OLD EQUIPMENT month some approaches obsolete piece equipment conversation usually starts description bow unit has just destroyed another fine airplane continues tales equip ment has back manufacturer six times doesnt work better now did first bought Additional models described snuffed out same system Finally get punch line manu facturer has gone out business Can fix standard advice follows First carefully unsolder crystal cut off pigtails servos holding receiver its antenna least six inches receiver case place re ceiver flat piece concrete Finally using 12-ounce carpenters hammer smash three times wont tempted use After initial giggle usual re action anger Obviously have too much money enough sense Actually Im pragmatist Modern equipment much better stuff produced ten years ago no justi fication trying fix old stuff way example older equipment particularly single-channel reed types 27-MHZ channels made extensive use canned german ium transistors 27 MHZ completely unsafe model airplanes face numerous citizen-band outlaws oper ating band Im lawyer seems model airplane 27 MHZ injured someone complain tant could make pretty good case charging contributory negligence part operator knowingly operated dangerous piece equipment presence widely known understood factors could cause loss control Thats gave up 27 MHZ aircraft years ago other hand seems quite adequate boats cars operate earths surface shielded somewhat above outlaws Germanium transistors once prized fact consumed 25% power silicon transistors putting inside cans supported welded leads made very open damage vibration shock Thats reasons old sets need repaired often Todays construction technique wherein silicon chip encapsulated epoxy almost immune shock vi bration Integrated circuits now widely used improve situation encapsulating some resistors capacitors used stand alone circuit board easily damaged Finally price engines balsa kits supplies has rising steadily cost good radios has falling 16 Model Aviation 4 Charles H Stumpf treasurer Grumman Model Aviation Society finds ST 23-powered Rebel fine lunchtime flier makes three four flights company-owned flying field Speaking routing antennas Ken Willard ran tiny bipe up top wing back tip tail out wing tip simply ran out airplane can no longer atiord unreliable radios Putting doubtful radio new airplane like putting old worn-out tires 1978 car Actually problem memory keep remembering price paid equipment should looking cost next crash will cause put money hobby could learn fly cant learning flying broken equipment Discard obsolete stuff would worn-out pair shoes get fun flying previous sermon has left some people unsatisfied Sometimes need new servo-motor batteries plugs switches other bits hardware does get best sources today RC kit manufacturers some addresses outline what can get ACE R/C Inc Box 511 116 W 19th St Higginsville MO 64037 Resistors capacitors transistors servo-motors plugs servo parts lines service Royal Electronics Corp 3535 5 Irving Englewood CO 80110 Same supplies ACE R/C different lines really should write both above manufacturers obtain catalogs before placing order Men tion name Once have catalog its usually quite easy find what want Another source supply Heathkit case have find what want parts list kits means either borrow manual someone has must make trip retail stores can study manual files didnt have practically back yard Heath equip ment didnt have things common Kraft probably wouldnt bother Heath Company Benton Harbor MI 49022 electronics parts houses have vir tually abandoned RC source busi ness wouldnt waste time Within limits can mix components RC systems various manu facturers Royal example lists servo-amplifiers catalog compatible specifically-named manu facturers such Kraft Pro-Line Heath Royal various Japanese sets ACE R/C describes necessary adjustments modifications lines pur pose adapting other manufacturers products have discussed previous columns some limitations such pulse polarity neutral pulse-width 3- 4- 5-wire systems etc Transmitters In general can drive flight pack transmitter same frequency some limi Con tinued page 87 3 /09 0 93I I0 MAN RA Ti AIC 48V0C PACI / February 1978 17 S. 2o3oEo5bGo7oaoqoico to/203oIva MJLLa q*fiERE5 Fig 1 Handy guide estimating charging time mixing various manufacturers equipment Ron Farkas president Suffolk NY Wings covered Enys 45-powered from-kit Wayfarer yellow blue Monokote flies quite comfortably power concentrate put less effort money trying perfect liquidcooled in-lines lower weight re duced maintenance first partly can celled out greater drag radial NACA developed its clean round cowling became possible build radial-engined planes fast in-line brothers still being demonstrated Reno Air Races Bearcats have won twice races Mustangs Wright J-5 R-790 won pres tigious Collier Trophy its makers 1927 soon led R-975 used some Beech Staggerwings prede cessor AT-6 R-1820 Cyclone used B-25 finally R-3350 used B-29 Constellation original J-5 bore 4 stroke 5/2 weight 508 lbs compression ratio 52 1 developed its 200 hp 1800 rpm Along immensely popular line radial engines 1920s 1930s some considerably less well known some cases radical designs nevertheless made own con tributions history devices make propellers go around airplanes go forward include barrel cam engines sleeve-valve designs lat ter British speciality Bristol engines type used thousands RAF bombers style piston engine has long used road vehicles brief success airplanes diesel After considerable experience German dirigibles tried airplanes Packard built good enough set non-refueling duration record 84 hours Ger mans brought diesel its greatest point Junkers Jumo 6-cylinder verticallyopposed water-cooled diesel used some extent pre-war airliners tracted attention powering Ju-86P high-altitude spy plane during early days World War II took spe cial model Spitfire climb above 40000 feet oil-burner working unmolested end line compression-ignition engine airplanes high-compres sion gasoline engine passed Jumo supercharging developed 750 hp 1800 rpm weighed 1650 lbs supercharging put out 1200 hp 3000 rpm other piston engines devel oped during period played ma jor roles story aircraft propulsion today gas turbine seems dominant tens thou sands being built Continental Ly coming year dozen herein described seem have played vital roles progress power few rattling horsepower thousands smooth dependable horses made airr 3 epoxy glues Because know model building cant done type glue Thatswhy Hobbypoxy makes three Formula 1 general purpose epoxy glue gives 15 minutes work ing time cures hard hour Thats just about right construction insllation components need shifted around bit perfect alignment before glue sets Formula 2 has much longer working time 45 minutes makes per fect large-area laminating planking wings can put glue ribs position skins pin down before glue hardens Formula 2 also recommended fiberglass layup fuel-proofing engine compartments surfacing resin bare balsa* Formula 4 superior version popular five minute epoxies Great quick construction quick repairs perfect joining parts impossible clamp pin st hand-hold few short minutes its done Hobbypoxy epoxy glues completely fuel proof permanently flexible Joints will never crack shatter way some other epoxies contrary popular myth Hobbypoxy epoxy glues will adhere cure properly prepared fiberglass So whatever youve got glue glue Hobby poxy original epoxy models *For complete description use Formula 2 finishing send free Poxy Painting Pointers brochure Write word glue request HOIhYPUNY PRODUCTS planes useful Radio Technique/Myers continued page 17 tions cannot mix encoding schemes such old single-channel pulse scheme reed systems modern digital proportional Variant another sys tem works its own transmitter/ receiver combinations total number channels transmitter has within two three number receiver can have trouble reset pulse wasted some time trying operate 2-channel receiver 6-channel trans mitter speak experience Division Pettit Paint Co Inc 25 Pine Street Rockaway NJ 07866 Another problem area can neu tral-pulse time new Kraft KP-4A system components interchange able other Kraft systems primarily because use l7ms neutral instead customary 1 5ms also moved wires Multicon connector servos cant connected plugged wrong receiver Receivers Subject discussion above can exchange receivers among various systems primary difficulty will plugs set plugs make necessary adapters 4-channel system will cost 7 10 dollars forced cut up aileron extender cables $3 apiece its Remember youll need February 1 978 87 five adapters 4-channel system order accommodate battery Servos Weve already mentioned neutral pulses plugs leaves mount ing hardware various dimensions servos problem start mixing systems may also have contend 3- 4- 5-wire systems Battery Packs Switch Harnesses Plugs main problem ChargersPlugs again addition must consider charging current have discussed previous columns really should insert milliammeter measure what get mix sys tems estimate time required reach full charge using Fig 1 people flying mixed collection parts flight pack quite well sons Sunfli 4-20 case point flight pack con sists Royal 2-ch receiver up graded four channels MA 9/77 pp 12 13 etc powered Kraft KB-4M battery pack through home-made switch harness servo group consists following Cox/Sanwa items Throttle 80322 miniature Aileron Elevator 80312 large regular Rudder/Nosewheel 80306 large waterproof transmitter Cox/Sanwa 8060 although used Kraft series 72 transmitter first plane has about 75 flights over fivemonth period has always worked perfectly Oh yes usually charge flight pack ACE R/C metered varicharger Go ahead mix up know works See trade shows hope get ideas future columns George M Myers 70 Froeblich Farm Rd Hicks vale NY 11801 R C Aerobatics/Van Putte continued page 25 property damage discussed battery charge situation Bill Johnston owner Kraft South east Bill told charges BLACK TO 4Sv PACK batteries six hours after days flying puts charge system timer charges batteries hour day solved problem different way purchased several older style Kraft chargers have separate pilot lights receiver transmitter bat tery packs high-rate configuration GE 1815 1816 bulb used re ceiver transmitter respectively ever both bulbs replaced GE 1820 bulbs charger becomes lowrate charger Now charge batteries night did before dont have worry about damaging batteries may want check radio manufacturer regarding modifications charge instructions have radio other Kraft nickel-cadmium batteries too expen sive spoil improper charging found out hard way year seems report unusual events happened latest New leans contest always manage come up something strange like night flying 1975Buzzard Bomb-shell flown miniature flashlights railroad flares weird bomb drops 197613 sort-of-fresh eggs dropped air plane special bomb bay year no exception Dave Constant Tom Golson put flying demonstrations during breaks pattern flying matched Sure-Flite Products Piper 1-3 airplanes 1-3 all-foam airplane requires little installation engine radio system plus some paint ready fly definitely sophisticated air planes Dave Tom put im pressive displays formation maneuvers Saturday Tom followed up night flights airplane using chemical flare wing two small flash lights other wing next day pair fooled spectators hav ing Dave supposedly perform spectacular flights both airplanes same time using transmitter Tommy carefully hidden crowd sec ond transmitter proceeded top WHITE 4-wire servos RED RED K _ RiR4R3TO SERVO 748514 TI R2ICi33 1C2C2 JL ORANGE 4 62171 -w -4 I2OMA 3 WIRE SERVO MOTOR CHECK guys wrote phoned schematic Hugh Shoemaker servo tester omitted December issue thousand pardonsand too Ron 88 Model Aviation Designeo expressiy 2 channel R/C plenty room just $2 about R/C up 4 channel miniature units Maintaining top quality simple construction inverted gull wing Balsa Plywood parts accurately die-cut Hardware Package including RIC III Hardware full-size stepbystep Plans flat finish Decal sheet Major Gregory Pappy Boyingtons Lulubelle appeared after Oct 17 1943 raid Kahili Airfield Solomons Recommended engine sizes maximum performance 09 10 Minimal performance achieved stock 049 051 Tee Dee Diesel ested