IIflGeorgeMMyers jiIJ THE MANUFACTURER says should get ground range least 75 feet 25 feet away no response Sound familiar Lots things affect ground-test range Fig 1 checklist some might want make copy tack field kit list can made longer think get point Dont panic have unusual ground-test range condition try find out Let give some examples Once flying off abandoned Air Force runway set out check ground-test range usual way handed trans mitter son Tim told him take walk busied myself fueling airplane laying out field kit often would raise arm wave him keep walking Fi nally looked up. im heard faint cry far enough tiny figure about /4 mile away What happened RF signal jumped down reenforcing rods concrete runway traveled along airplane Sorry about Tim Another example students airplane worked well some time day found ground-test range dropped prac tically nothing Reason changed antenna routing former ly exited trailing edge wing now led forward through windshield area back over wing top fin doing doubled part antenna back over self noted results dont know spend Saturdays conducting semi-formal class operation radio-controlled models Pictures show some stu dents point wish observe use Carl Goldbergs Ranger 42 basic trainer recommend plane anyone contemplating entry hobby following reasons 1 The plane flies well will fly upright inverted make inside outside loops perform creditable rolls spins requires just enough attention takeoffs landings build good habits example will snaproll ground time try force air before has reached flying speed 2 The plane practically ready fly take out box ginner doesnt have heart soul model find fear crashing big expensive model slows learning students practically evitable crash happens foam soaks up shock well engine radio seldom damaged have collect little bits white plastic epoxy back together 3 The plan engine 09 recom mended cheap 4 Being small plane must flown closer pilot larger mod el would experience begin ners fly too high too far away did too thats no reason keep repeating mistakes 12 Model Aviation Georges class convenes sunny Saturday morning Daryl Tennenbaum holds Gail Waite starts engine Note safety glasses everybody staying clear spinning prop Art Cervenka typical Ranger 42 powered OS1O R/C engine using three channels control advises use 7/6 prop cut 65/6 make sure engine well broken ground Nose gear modified castor rubberband centering easier takeoff point introducing Ranger 42 point best place receiver airplane tailcone trailing edge wing places receiver antenna far possible switch harness servo wiring student has tried own variation installation first work some degree arrangement de scribed above works best Put piece scrap foam behind receiver bulk head keep receiver moving too far rear Fig 2 shows interior Quickee 500 Note similar arrangement used Ground range maximum get no glitches flying low around pylons other transmitters operat ing nearby diffi cult radio situations An additional bene fit installation receiver gets crash site last sand wich receiver between landing-gear bulkhead some heavy batteries servos asking some expensive damage switch system pow ered model sailplane probably notice reduction ground-test range Fig 3 shows antenna tri gear airplane will average about 12 inches above ground sailplane sel dom exceeds 3 inches fence much easier see curbstone thats way transmitter views differ ences between two installations Similar ground-test range reductions can expected wtith Y2A racers other aircraft landing gear Nothing worry about Just check ground-test range before flying sesion after hard landing before flying flight yond fourth given charge batteries Investigate changes 10% flying buddy Bob Aberle W2QPP makes radio installations somewhat differently working designs integral wing case leads antenna out through holes left wing ribs RCM wing jig places antenna wire right angles rest great excess antenna length just trails wing tip larger models midgets like 02-powered Cannonball 01powered Little Eaglet Bob returns excess antenna down other set holes Now definitely good practice planes small Bob never lets get very far away finds control adequate Remember keep plane close decide try Bobs method Finally must recount tale young man shall remain nameless after routing receiver antenna out through side plane opposite CAUSEI EFFECT AYIEIINA HEIGHTClose ground Short range AtIT ORIENTATION Tranamitter antenna parallel receiver antenna produces longest range BATTERY VOLTAGE Low voltage short range. TEMPERATURE Eigh low temperatures usually reduce range OTI TRANSMITTERS Other transmitters nearby different frequencies yours reduce ground-test range FETAL OBJECTS Buried pipes overhead wires parked cars fences NEARBY etc can conduct reflect HF energy causing range either increase decrease GROUND MOISTURE Wet ground usually reduces ground-test range GLOVES BOOTS ETq YOU part transmitter circuit ON OPERATOR insulators can reduce range WIRE ARRANGEFENTS See text best range keep antenna away other leads TUNING MID Careful tuning produces longest ground-test range ALIGNMENT With some older sets necessary tune receiver after installed airplane Fig 1 Ground-range checklist Post copy field kitand check range frequently FUEL TTTL BATTERY FORWARD AILERON 9VA~ CEIVER K ANTENNA Fig 2 Fig 2 Interior arrangement authors Quickie 500 shows receiver located aft rest radio system Along providing good radio reception installation insures receiver gets crash site last sex George Powered airplane antenna above fuselage 2to3 Fig 3 Sailplane antenna inside fuselage Fig 3 Height antenna above ground explains greater ground-test range powered airplane exhaust leading tip stabilizer over top fin tip opposite stabilizer good moves way found himself unsightly length antenna still dangling breeze sake neatness cut excess off Dont please fact whenever get new receiver measure antenna length write case Magic Marker Usually will either yard meter long case youll want know what length replace need arises Enough chatter lets go flying Address ideas inquiries George M Myers 70 Froehlich Farm Rd Hicks ville NY 11801 December1977 13
Edition: Model Aviation - 1977/12
Page Numbers: 12, 13
IIflGeorgeMMyers jiIJ THE MANUFACTURER says should get ground range least 75 feet 25 feet away no response Sound familiar Lots things affect ground-test range Fig 1 checklist some might want make copy tack field kit list can made longer think get point Dont panic have unusual ground-test range condition try find out Let give some examples Once flying off abandoned Air Force runway set out check ground-test range usual way handed trans mitter son Tim told him take walk busied myself fueling airplane laying out field kit often would raise arm wave him keep walking Fi nally looked up. im heard faint cry far enough tiny figure about /4 mile away What happened RF signal jumped down reenforcing rods concrete runway traveled along airplane Sorry about Tim Another example students airplane worked well some time day found ground-test range dropped prac tically nothing Reason changed antenna routing former ly exited trailing edge wing now led forward through windshield area back over wing top fin doing doubled part antenna back over self noted results dont know spend Saturdays conducting semi-formal class operation radio-controlled models Pictures show some stu dents point wish observe use Carl Goldbergs Ranger 42 basic trainer recommend plane anyone contemplating entry hobby following reasons 1 The plane flies well will fly upright inverted make inside outside loops perform creditable rolls spins requires just enough attention takeoffs landings build good habits example will snaproll ground time try force air before has reached flying speed 2 The plane practically ready fly take out box ginner doesnt have heart soul model find fear crashing big expensive model slows learning students practically evitable crash happens foam soaks up shock well engine radio seldom damaged have collect little bits white plastic epoxy back together 3 The plan engine 09 recom mended cheap 4 Being small plane must flown closer pilot larger mod el would experience begin ners fly too high too far away did too thats no reason keep repeating mistakes 12 Model Aviation Georges class convenes sunny Saturday morning Daryl Tennenbaum holds Gail Waite starts engine Note safety glasses everybody staying clear spinning prop Art Cervenka typical Ranger 42 powered OS1O R/C engine using three channels control advises use 7/6 prop cut 65/6 make sure engine well broken ground Nose gear modified castor rubberband centering easier takeoff point introducing Ranger 42 point best place receiver airplane tailcone trailing edge wing places receiver antenna far possible switch harness servo wiring student has tried own variation installation first work some degree arrangement de scribed above works best Put piece scrap foam behind receiver bulk head keep receiver moving too far rear Fig 2 shows interior Quickee 500 Note similar arrangement used Ground range maximum get no glitches flying low around pylons other transmitters operat ing nearby diffi cult radio situations An additional bene fit installation receiver gets crash site last sand wich receiver between landing-gear bulkhead some heavy batteries servos asking some expensive damage switch system pow ered model sailplane probably notice reduction ground-test range Fig 3 shows antenna tri gear airplane will average about 12 inches above ground sailplane sel dom exceeds 3 inches fence much easier see curbstone thats way transmitter views differ ences between two installations Similar ground-test range reductions can expected wtith Y2A racers other aircraft landing gear Nothing worry about Just check ground-test range before flying sesion after hard landing before flying flight yond fourth given charge batteries Investigate changes 10% flying buddy Bob Aberle W2QPP makes radio installations somewhat differently working designs integral wing case leads antenna out through holes left wing ribs RCM wing jig places antenna wire right angles rest great excess antenna length just trails wing tip larger models midgets like 02-powered Cannonball 01powered Little Eaglet Bob returns excess antenna down other set holes Now definitely good practice planes small Bob never lets get very far away finds control adequate Remember keep plane close decide try Bobs method Finally must recount tale young man shall remain nameless after routing receiver antenna out through side plane opposite CAUSEI EFFECT AYIEIINA HEIGHTClose ground Short range AtIT ORIENTATION Tranamitter antenna parallel receiver antenna produces longest range BATTERY VOLTAGE Low voltage short range. TEMPERATURE Eigh low temperatures usually reduce range OTI TRANSMITTERS Other transmitters nearby different frequencies yours reduce ground-test range FETAL OBJECTS Buried pipes overhead wires parked cars fences NEARBY etc can conduct reflect HF energy causing range either increase decrease GROUND MOISTURE Wet ground usually reduces ground-test range GLOVES BOOTS ETq YOU part transmitter circuit ON OPERATOR insulators can reduce range WIRE ARRANGEFENTS See text best range keep antenna away other leads TUNING MID Careful tuning produces longest ground-test range ALIGNMENT With some older sets necessary tune receiver after installed airplane Fig 1 Ground-range checklist Post copy field kitand check range frequently FUEL TTTL BATTERY FORWARD AILERON 9VA~ CEIVER K ANTENNA Fig 2 Fig 2 Interior arrangement authors Quickie 500 shows receiver located aft rest radio system Along providing good radio reception installation insures receiver gets crash site last sex George Powered airplane antenna above fuselage 2to3 Fig 3 Sailplane antenna inside fuselage Fig 3 Height antenna above ground explains greater ground-test range powered airplane exhaust leading tip stabilizer over top fin tip opposite stabilizer good moves way found himself unsightly length antenna still dangling breeze sake neatness cut excess off Dont please fact whenever get new receiver measure antenna length write case Magic Marker Usually will either yard meter long case youll want know what length replace need arises Enough chatter lets go flying Address ideas inquiries George M Myers 70 Froehlich Farm Rd Hicks ville NY 11801 December1977 13