RADIO CONTROL HELICOPTERS ONE OF THE MOST frustrating aspects hobby getting vibration out helicopters Although some causes vibration hard find always try remember middle frustration definite engineering cause have play Dick Tracy find part helicopter causing trouble cure easy first cure vibration build helicopter exactly according instructions taking time step ensure done right Because some people cant wait get machines air rush through building process causes vibration can built out Whether helicopter new old lets assume just started up brought hover noticed some degree vibration First note type vibration relatively low frequencythe type would come main rotor head faster vibrationthe type would come engine Also helicopter vibrating foam fuel tank skids vibrating tail rotor jumping up down something else Since flying field would like fix problem rather going home few things check right off bat 1 Although out-of-track blades major source vibration could part problem Make sure track adjust necessary 2 If tail jumping up down check tightness tail rotor blades will sometimes cause type vibration too loose should snug loose enough move proper position tail rotor comes up speed 3 Sometimes rich-running engine will cause fuel foam tail twitchyto move suddenly right left because rich-running engine will run rough engine speed itself will slightly erratic causing tail rotor speed change slightly thereby moving tail right left either case lean out mixture slightly see makes improvement However extremely cautious engine run too leanthat will cause overheat resulting permanent engine damage 4 If nothing has worked far thing left field make some slight changes balance head both rotor blades flybar Adjust time a Starting main rotor blades place small piece electrical tape once around either rotor blade CG Since dont know blade out balance just pick assume its light blade Bring helicopter hover Has vibration decreased blades out balance guessed right blade Add remove tape until vibration gone just cant better Ifihe vibration got worse simplypicked wrong blade thats case take tape off add piece other blade repeat process b If adding tape rotor blade doesnt eliminate vibration try minor balance adjustment flybar flybar has weights installed move weight vibration got worse move weight back its original position move other weight slightly Hopefully some slight movement weights will bring flybar better balance flybar does have weights install small wheel collar half flybar building doesnt take much change weight bring flybar balance wheel collars enough weight still have vibration blues its time take machine back workbench much can accomplished flying field think problem highfrequency vibration like would cause fuel foam probable cause misaligned starter shaft helicopter has case engine starter shaft combination will have come out starter shaft checked proper alignment dial indicator Get runout close zero possible generally accepted runout figure maximum performance vibration-free operation 002 inches After work rechecking balance main tail rotors always possibility cause vibration has foundthis frustration can really set As less last resort start disassembling helicopter field find source vibration disconnect part helicopter time run up engine see vibration gone last piece removed source usually start disconnecting tail rotor drive wire exits main gear Since no tail rotor anymore helicopter cant brought hover engine can started see Right Auto Driver Panel auto-adjusts glowplug will burn out flooded plugs indicates condition 12V battery July 1994 101 Varsane Products new Remote Needle Valve allows accessible location between engine fuel tank battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field vibration still remove main rotor blades check again next step remove entire head associated linkages again try engine run-up check Using technique will eventually get down engine starter shaft somewhere along line will come across cause vibration know can sound rather complicated time-consuming doesnt take much time Perhaps real benefit going through acquiring appreciation building helicopter correctly first timeso comes off building board close being balance possible No matter what takes make effort remove vibration does nothing cause helicopter wear prematurely fly poorly leading causes radio failure Orange Blossom Hobbies 1975 NW 36th St Miami FL 33142 has Mark III Automatic Driver Panel available impressive list features have seen before include six- 12-volt terminals fuel pumps back panel advanced glow driver circuitry automatically adjusts output current light type glow plug will automatically adjust itself burn off excess fuel flooded engine Powered 12-volt battery master power switch turns unit LED glows green indicate charged 12-volt battery LED automatically turns red battery needs charging Isnt nice know state 12-volt battery before going flying field Varsane Products 546 5 Pacific St Suite C-l01 San Marcos CA 92069 manufacturing remote needle valve should very useful helicopters unit mounted between fuel tank normal engine needle valve normal needle valve set very rich condition remote needle valve used adjust mixture means can now place remote needle valve easy-to-reach position will especially helpful using fuselages other applications needle valve may readily accessible 4ANNOUNCING THE NEW VA O9 Light 35 grams/124 ouncas Powerful new standard high-output l/2A engines Versatile Two models available Crmnpetilion/Sport RYEIT Roil-Your Own Tuning WmodelisforyouHaveyouusedaflremeltoolonanengineyouownDiditrun lester afterward answer Yes both questions will love VA 048 H Y ELT answer either question No will love VA 046 CompetiUm/Sport 334 Need lots power lots noise heve 5-gram muffler available Available local dealer distributed 6113 MIg 15151 623-5154 Also available Aldrich Models 210] 656-2021 Hustirn Braftarnanship 618 728-4365 ImpeKed ly Ha Ialkckferd dba ILl Iupsrt/Ilxpuat 206421-5706 FaZ 236 4S7-1725 also Importing terrific-flyIng Junior 451 C02-powered AHF Free FlIght model 28 wIngspan 3 ounces Easy assemble operate consider [IP-03 C02 motor package conversion rubber-power models ease rellablity C02 power Both Junior 451 IJP-03 dIstributed Sf3 Mfg 102 Model Aviation TING SYSTEMS THE ORIGINALS. Still Best #RAM 01Programmable Flashing Navigation Lights 9V$2495 #RAM 02Strobe Light Adj Rate 9V$1995 #RAM 03Landing Lights 4BV$3995 #RAM 04Mars Rotating Beacon Adj Rate 9V$1995 #RAM 05Marine Navigation Lights nonflashing 9V$1095 #RAM 06Sky Lights 18 Light Set 9V$2495 #RAM 14Big Airplane Navigation Lights 9V$2495 #RAM 16Econo Landing Lights brightest 9V$1995 #RAM 23Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO unavailable locally send check money order full credit card Info coat item plus $400 $500 foreignlfor Immediate shIpment Include full address U PS Sorry no COD 229A E Rollins Rd d Lake Beach IL 60073 B&P Associates Gives Total Flight Line FREEDOM WANTED Ignition Model Engines 1930s 1950s Elf Baby Cyclone Brown Jr Ohlsson Etc -ALSOModel Race Cars & Boats Any Parts Spark Plugs Etc Woody Bartelt 1301 W Lafayette Sturgis MI 49091 800-982-5464 616-665-9693 CatalogsThe Best Scale Best Scale$400 ASP Model aircraftPlans Handbook$500 ASP Scale DrowinqPlans Book$500 RC Model World Const Guide$600 VTH German PlansBook$600 V.. add *100 Peaepe j. 1-5 ddpe Call 909 885 3959 credit card orders BOEING B-17 1/10TH SCALE 120 SPAN PLANS S45 00 EPOXY GLASS cowLs & PLASTIC NOSE & TURRETS $7500 ALL BUILT UP CONSTRUCTION Winners ToledoThe Masters others Bob flolman Box 741 San Berdo CA 92402
Edition: Model Aviation - 1994/07
Page Numbers: 101, 102
RADIO CONTROL HELICOPTERS ONE OF THE MOST frustrating aspects hobby getting vibration out helicopters Although some causes vibration hard find always try remember middle frustration definite engineering cause have play Dick Tracy find part helicopter causing trouble cure easy first cure vibration build helicopter exactly according instructions taking time step ensure done right Because some people cant wait get machines air rush through building process causes vibration can built out Whether helicopter new old lets assume just started up brought hover noticed some degree vibration First note type vibration relatively low frequencythe type would come main rotor head faster vibrationthe type would come engine Also helicopter vibrating foam fuel tank skids vibrating tail rotor jumping up down something else Since flying field would like fix problem rather going home few things check right off bat 1 Although out-of-track blades major source vibration could part problem Make sure track adjust necessary 2 If tail jumping up down check tightness tail rotor blades will sometimes cause type vibration too loose should snug loose enough move proper position tail rotor comes up speed 3 Sometimes rich-running engine will cause fuel foam tail twitchyto move suddenly right left because rich-running engine will run rough engine speed itself will slightly erratic causing tail rotor speed change slightly thereby moving tail right left either case lean out mixture slightly see makes improvement However extremely cautious engine run too leanthat will cause overheat resulting permanent engine damage 4 If nothing has worked far thing left field make some slight changes balance head both rotor blades flybar Adjust time a Starting main rotor blades place small piece electrical tape once around either rotor blade CG Since dont know blade out balance just pick assume its light blade Bring helicopter hover Has vibration decreased blades out balance guessed right blade Add remove tape until vibration gone just cant better Ifihe vibration got worse simplypicked wrong blade thats case take tape off add piece other blade repeat process b If adding tape rotor blade doesnt eliminate vibration try minor balance adjustment flybar flybar has weights installed move weight vibration got worse move weight back its original position move other weight slightly Hopefully some slight movement weights will bring flybar better balance flybar does have weights install small wheel collar half flybar building doesnt take much change weight bring flybar balance wheel collars enough weight still have vibration blues its time take machine back workbench much can accomplished flying field think problem highfrequency vibration like would cause fuel foam probable cause misaligned starter shaft helicopter has case engine starter shaft combination will have come out starter shaft checked proper alignment dial indicator Get runout close zero possible generally accepted runout figure maximum performance vibration-free operation 002 inches After work rechecking balance main tail rotors always possibility cause vibration has foundthis frustration can really set As less last resort start disassembling helicopter field find source vibration disconnect part helicopter time run up engine see vibration gone last piece removed source usually start disconnecting tail rotor drive wire exits main gear Since no tail rotor anymore helicopter cant brought hover engine can started see Right Auto Driver Panel auto-adjusts glowplug will burn out flooded plugs indicates condition 12V battery July 1994 101 Varsane Products new Remote Needle Valve allows accessible location between engine fuel tank battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field vibration still remove main rotor blades check again next step remove entire head associated linkages again try engine run-up check Using technique will eventually get down engine starter shaft somewhere along line will come across cause vibration know can sound rather complicated time-consuming doesnt take much time Perhaps real benefit going through acquiring appreciation building helicopter correctly first timeso comes off building board close being balance possible No matter what takes make effort remove vibration does nothing cause helicopter wear prematurely fly poorly leading causes radio failure Orange Blossom Hobbies 1975 NW 36th St Miami FL 33142 has Mark III Automatic Driver Panel available impressive list features have seen before include six- 12-volt terminals fuel pumps back panel advanced glow driver circuitry automatically adjusts output current light type glow plug will automatically adjust itself burn off excess fuel flooded engine Powered 12-volt battery master power switch turns unit LED glows green indicate charged 12-volt battery LED automatically turns red battery needs charging Isnt nice know state 12-volt battery before going flying field Varsane Products 546 5 Pacific St Suite C-l01 San Marcos CA 92069 manufacturing remote needle valve should very useful helicopters unit mounted between fuel tank normal engine needle valve normal needle valve set very rich condition remote needle valve used adjust mixture means can now place remote needle valve easy-to-reach position will especially helpful using fuselages other applications needle valve may readily accessible 4ANNOUNCING THE NEW VA O9 Light 35 grams/124 ouncas Powerful new standard high-output l/2A engines Versatile Two models available Crmnpetilion/Sport RYEIT Roil-Your Own Tuning WmodelisforyouHaveyouusedaflremeltoolonanengineyouownDiditrun lester afterward answer Yes both questions will love VA 048 H Y ELT answer either question No will love VA 046 CompetiUm/Sport 334 Need lots power lots noise heve 5-gram muffler available Available local dealer distributed 6113 MIg 15151 623-5154 Also available Aldrich Models 210] 656-2021 Hustirn Braftarnanship 618 728-4365 ImpeKed ly Ha Ialkckferd dba ILl Iupsrt/Ilxpuat 206421-5706 FaZ 236 4S7-1725 also Importing terrific-flyIng Junior 451 C02-powered AHF Free FlIght model 28 wIngspan 3 ounces Easy assemble operate consider [IP-03 C02 motor package conversion rubber-power models ease rellablity C02 power Both Junior 451 IJP-03 dIstributed Sf3 Mfg 102 Model Aviation TING SYSTEMS THE ORIGINALS. Still Best #RAM 01Programmable Flashing Navigation Lights 9V$2495 #RAM 02Strobe Light Adj Rate 9V$1995 #RAM 03Landing Lights 4BV$3995 #RAM 04Mars Rotating Beacon Adj Rate 9V$1995 #RAM 05Marine Navigation Lights nonflashing 9V$1095 #RAM 06Sky Lights 18 Light Set 9V$2495 #RAM 14Big Airplane Navigation Lights 9V$2495 #RAM 16Econo Landing Lights brightest 9V$1995 #RAM 23Real Strobe Light true zenon strobe 3V$2995 0 SEE YOUR DEALER 0 SEND STAMPED ENVELOPE FOR RAM INFO unavailable locally send check money order full credit card Info coat item plus $400 $500 foreignlfor Immediate shIpment Include full address U PS Sorry no COD 229A E Rollins Rd d Lake Beach IL 60073 B&P Associates Gives Total Flight Line FREEDOM WANTED Ignition Model Engines 1930s 1950s Elf Baby Cyclone Brown Jr Ohlsson Etc -ALSOModel Race Cars & Boats Any Parts Spark Plugs Etc Woody Bartelt 1301 W Lafayette Sturgis MI 49091 800-982-5464 616-665-9693 CatalogsThe Best Scale Best Scale$400 ASP Model aircraftPlans Handbook$500 ASP Scale DrowinqPlans Book$500 RC Model World Const Guide$600 VTH German PlansBook$600 V.. add *100 Peaepe j. 1-5 ddpe Call 909 885 3959 credit card orders BOEING B-17 1/10TH SCALE 120 SPAN PLANS S45 00 EPOXY GLASS cowLs & PLASTIC NOSE & TURRETS $7500 ALL BUILT UP CONSTRUCTION Winners ToledoThe Masters others Bob flolman Box 741 San Berdo CA 92402