RADIO CONTROL HELICOPTERS NEW HELICOPTER PUBLICATION called Model Helicopter Technique 4926 Verdura Ave Lakewood CA 90712-3018 has recently hit streets being published Ray Hostetler give us helicopter information Rays publishing dollar quarterly publication printed black white stock paper bound staples Im really impressed attitude magazine cutting down frills beefing up informative interesting articles helps classes fliers hope give publication support because ones will benefit long run MHT articles pilot profile Curtis Youngblood responds Rays questions Although have never met Curtis seen him fly except videos Im impressed basically stock X-Cell down-to-earth attitude relying basic helicopter asked used Delta offset rotor head said no because contrary claims never saw what supposed refreshing read because know feel need latest trick item available improve flying also believe Delta offset rotor system offers no added flight improvementlets take closer look see accompanying figure shows both normal Delta offset blade grip compare illustration purposes pushrod swashplate connected bell mixer whichin case Curtis X-Cellis connected leading edge blade grip Therefore input swashplate acts blade grip through bell mixer clarity bell mixer has omitted figure simply shows push rod input going directly blade grip point normal setup has bell mixer attached blade grip point line centerline main shaft point also assumed blade flapping pivot point means wind gust causes rotor blade flap up down rotor blade will affected bell mixer/ pushrod because everything line pivot point However Delta offset has built-in stabilizing effect rotor system rotor disk disturbed because connection point blade grip now displaced main shaft point farther out blade grip Point B Now assume rotor blade again disturbed wind gust up direction raises rotor blade blade holder again pivots about point directly above 00 Ir main shaft Although point B wants move up rest blade grip rod swashplatelbell mixer will let thereby causing rotor blade rotate slightly decrease its angle attack Its decrease angle attack counters wind gust because stronger wind gust raise blade grip resultant decrease angle attack stabilize blade entire rotor system process however rests assumption rotor blade can indeed move up down can pivot about main shaft helicopters such X-Cell have semirigid rotor heads allow rotor blades flap lack flapping action defeats purpose Delta offset Although have data other rotor systems allow blade flapping action such Concept series helicopters impression flying Delta offset would have no better stabilizing affect because rotor system designed flap manner have heard new Kalt head designed allow blade flap up other flaps down has distinct possibilitiesat least theoreticallyto improve helicopter stability gusty weather conditions have opportunity try head I will let know performs improve stability However Delta offset very present tail rotor X-Cell well full-scale helicopter tail rotors believe tail rotor design X-Cell almost identical Bell Jet Ranger tail rotors hub soft90 Model Aviation t Normat blade grip has arm /attach point line main shaft Point B Delta offset has arm attach /point away maiis shaft Swashplate/Mixer Fig Normal Delta offsets shown bladc grip Orange Blossom Hobbies fuelproof finished field box holds power panel 12V battery transmitter Hobby Club SG-86 30 smaller models Hitec GY-1 OOBBwith its dual-rate featureis larger models 10th ANNUAL MARC SHOW * NOW FULLY BJR-CONDrnONEDI * MID ATLANTIC RADIO CONTROL JUNE4AND5 1994 Saturday9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND FOR INFORMAllON cOIrrACT Sh Direos RON STAHL 4521 BelMeu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-6686690 SWAP SHOP $20 Per Day Indudes Admission NO DEALERS PLEASE Um 2 tables per peson -SWAP SHOP ONLYFor Pre-Registration call Vernon Davies 41 0-823-4562 Sponscyed a. INC TO YORK 45 YORK RD EXIT 171 PADOMA RD TiMONIUM FAIR 83GROUNDS TO FREDRICK TIMONIUM RD95 70695 40695 IALflMBE 95T PKWY TO WASHINGTONNORTh Static Displays RadK Kit & Equipment Raffle Door Prizes Free Paildng 5000 Ca Refreshment Centers Indoor & Outdoor Demonstrations Fadory Teams Aircraft -Cars-Boats Radios-Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond AS ALWAYS SELUNG SHOW TO WILMINGTON mounted tail rotor shaft thereby allowing flap blade grip attach points displaced away output shaft can see Delta stabilizing effect viewing X-Cell tail rotor above blades horizontal position looking left blade ball link push blade tip away tailboom will see both tail rotor blade well blade grip move away tailboom pushrod holds ball link stationary results slight decrease angle attack tail rotor blade Delta offset principle work main rotor same type flapping action must present S&S Hell Products806 W Harrison Rd Longview TX 75608 Tel 903 759-7106is manufacturing quality CNC machined accessories helicopters what consider very reasonable prices have chance try several products shown photo Unfortunately photo just does work justice rotor head complete bolt-on head button machined unit X Cell 60 looks good would hate ever see scratch Its highly polished aluminum really gives helicopter distinctive look other items machined Bell Hiller mixers ready accept original bearings extended balls goldanodized T6 head button X-Cells X-Cell flybar lock Magna-Pipe bracket again X-Cell 50/60 represent few items available S&S coming up new ideas products time send updated complete list Orange Blossom Hobbies1975 NW 36th St Miami FL 33142is selling complete ready-to-use all-wood field box suitable model helicopters airplanes type RC activity has plenty room power panel top enclosed vented battery compartment two large pull-out drawers transmitter shelf three large separated compartments below strong metal handle really sturdy wellbuilt unit made finished plywood coated clear fuel-proof finish should last flying seasons am also using new power panel will report later column Hobby Club23 141 Arroyo Vista #2 10 Rancho Santa Margaruta CA 92688is selling new SG-86 Super Micro Gyro Electric 30-size helicopters two-piece unit gyro electronics powered airborne power supply Weighing 64 grams its fully ball-bearing supported has chrome cover completely around gyro block radiated motor noise also has reverse switch sensitivity adjustment pot hookup very easy because uses two connectorsone receiver other servo connectors supplied can used either JR Futaba radios Airtronics radios require conversion connector Hitec RCD Inc10729 Wheatlands Aye Suite C Santee CA 92071is distributing GY- lOOBB ball-bearing series gyro Weighing 115 grams its powered receiver 48-volt battery l2OmA drain three-piece unit has dual sensitivity settings can changed flight using spare channel reverse switch two sensitivity adjustments make very easy set up double-sided tape already applied gyro body GY- lOOBB would perfect 30 larger-size helicopters dual rates being handy switch between hovering aerobatic settings 1994 91 S Over 100 Manufaurers Next Month MODEL AIRCRAFT STRUCTURAL DESIGN PART AG Lennon
Edition: Model Aviation - 1994/06
Page Numbers: 90, 91
RADIO CONTROL HELICOPTERS NEW HELICOPTER PUBLICATION called Model Helicopter Technique 4926 Verdura Ave Lakewood CA 90712-3018 has recently hit streets being published Ray Hostetler give us helicopter information Rays publishing dollar quarterly publication printed black white stock paper bound staples Im really impressed attitude magazine cutting down frills beefing up informative interesting articles helps classes fliers hope give publication support because ones will benefit long run MHT articles pilot profile Curtis Youngblood responds Rays questions Although have never met Curtis seen him fly except videos Im impressed basically stock X-Cell down-to-earth attitude relying basic helicopter asked used Delta offset rotor head said no because contrary claims never saw what supposed refreshing read because know feel need latest trick item available improve flying also believe Delta offset rotor system offers no added flight improvementlets take closer look see accompanying figure shows both normal Delta offset blade grip compare illustration purposes pushrod swashplate connected bell mixer whichin case Curtis X-Cellis connected leading edge blade grip Therefore input swashplate acts blade grip through bell mixer clarity bell mixer has omitted figure simply shows push rod input going directly blade grip point normal setup has bell mixer attached blade grip point line centerline main shaft point also assumed blade flapping pivot point means wind gust causes rotor blade flap up down rotor blade will affected bell mixer/ pushrod because everything line pivot point However Delta offset has built-in stabilizing effect rotor system rotor disk disturbed because connection point blade grip now displaced main shaft point farther out blade grip Point B Now assume rotor blade again disturbed wind gust up direction raises rotor blade blade holder again pivots about point directly above 00 Ir main shaft Although point B wants move up rest blade grip rod swashplatelbell mixer will let thereby causing rotor blade rotate slightly decrease its angle attack Its decrease angle attack counters wind gust because stronger wind gust raise blade grip resultant decrease angle attack stabilize blade entire rotor system process however rests assumption rotor blade can indeed move up down can pivot about main shaft helicopters such X-Cell have semirigid rotor heads allow rotor blades flap lack flapping action defeats purpose Delta offset Although have data other rotor systems allow blade flapping action such Concept series helicopters impression flying Delta offset would have no better stabilizing affect because rotor system designed flap manner have heard new Kalt head designed allow blade flap up other flaps down has distinct possibilitiesat least theoreticallyto improve helicopter stability gusty weather conditions have opportunity try head I will let know performs improve stability However Delta offset very present tail rotor X-Cell well full-scale helicopter tail rotors believe tail rotor design X-Cell almost identical Bell Jet Ranger tail rotors hub soft90 Model Aviation t Normat blade grip has arm /attach point line main shaft Point B Delta offset has arm attach /point away maiis shaft Swashplate/Mixer Fig Normal Delta offsets shown bladc grip Orange Blossom Hobbies fuelproof finished field box holds power panel 12V battery transmitter Hobby Club SG-86 30 smaller models Hitec GY-1 OOBBwith its dual-rate featureis larger models 10th ANNUAL MARC SHOW * NOW FULLY BJR-CONDrnONEDI * MID ATLANTIC RADIO CONTROL JUNE4AND5 1994 Saturday9 am 5 pm Sunday 10 am 4 pm MARYLAND STATE FAIR GROUNDS TIMONIUM MARYLAND FOR INFORMAllON cOIrrACT Sh Direos RON STAHL 4521 BelMeu Ave Baltimore MD 21215 410-664-2712 DAVE MITCHELL 410-6686690 SWAP SHOP $20 Per Day Indudes Admission NO DEALERS PLEASE Um 2 tables per peson -SWAP SHOP ONLYFor Pre-Registration call Vernon Davies 41 0-823-4562 Sponscyed a. INC TO YORK 45 YORK RD EXIT 171 PADOMA RD TiMONIUM FAIR 83GROUNDS TO FREDRICK TIMONIUM RD95 70695 40695 IALflMBE 95T PKWY TO WASHINGTONNORTh Static Displays RadK Kit & Equipment Raffle Door Prizes Free Paildng 5000 Ca Refreshment Centers Indoor & Outdoor Demonstrations Fadory Teams Aircraft -Cars-Boats Radios-Engines Transmitter Testing 9000 Gallon Outdoor Boat Pond AS ALWAYS SELUNG SHOW TO WILMINGTON mounted tail rotor shaft thereby allowing flap blade grip attach points displaced away output shaft can see Delta stabilizing effect viewing X-Cell tail rotor above blades horizontal position looking left blade ball link push blade tip away tailboom will see both tail rotor blade well blade grip move away tailboom pushrod holds ball link stationary results slight decrease angle attack tail rotor blade Delta offset principle work main rotor same type flapping action must present S&S Hell Products806 W Harrison Rd Longview TX 75608 Tel 903 759-7106is manufacturing quality CNC machined accessories helicopters what consider very reasonable prices have chance try several products shown photo Unfortunately photo just does work justice rotor head complete bolt-on head button machined unit X Cell 60 looks good would hate ever see scratch Its highly polished aluminum really gives helicopter distinctive look other items machined Bell Hiller mixers ready accept original bearings extended balls goldanodized T6 head button X-Cells X-Cell flybar lock Magna-Pipe bracket again X-Cell 50/60 represent few items available S&S coming up new ideas products time send updated complete list Orange Blossom Hobbies1975 NW 36th St Miami FL 33142is selling complete ready-to-use all-wood field box suitable model helicopters airplanes type RC activity has plenty room power panel top enclosed vented battery compartment two large pull-out drawers transmitter shelf three large separated compartments below strong metal handle really sturdy wellbuilt unit made finished plywood coated clear fuel-proof finish should last flying seasons am also using new power panel will report later column Hobby Club23 141 Arroyo Vista #2 10 Rancho Santa Margaruta CA 92688is selling new SG-86 Super Micro Gyro Electric 30-size helicopters two-piece unit gyro electronics powered airborne power supply Weighing 64 grams its fully ball-bearing supported has chrome cover completely around gyro block radiated motor noise also has reverse switch sensitivity adjustment pot hookup very easy because uses two connectorsone receiver other servo connectors supplied can used either JR Futaba radios Airtronics radios require conversion connector Hitec RCD Inc10729 Wheatlands Aye Suite C Santee CA 92071is distributing GY- lOOBB ball-bearing series gyro Weighing 115 grams its powered receiver 48-volt battery l2OmA drain three-piece unit has dual sensitivity settings can changed flight using spare channel reverse switch two sensitivity adjustments make very easy set up double-sided tape already applied gyro body GY- lOOBB would perfect 30 larger-size helicopters dual rates being handy switch between hovering aerobatic settings 1994 91 S Over 100 Manufaurers Next Month MODEL AIRCRAFT STRUCTURAL DESIGN PART AG Lennon