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HelicopterScale Model RC Helicopters › Tilted Main Shaft
12-17-2013 06:03 PM  3 years agoPost 1
don s

rrElite Veteran

Chesapeake, VA

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Anybody tilt the main shaft right (or left) depending on rotor rotation? Do any full scale helicopters do this?

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12-17-2013 06:10 PM  3 years agoPost 2
Heli 770

rrProfessor

USA.

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I think full scale will only tilt it forward.

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12-17-2013 06:29 PM  3 years agoPost 3
Copter Doctor

rrProfessor

Enterprise/ft.rucker​,al- home of army​aviation

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Some helis have the mast tilted forward a few degrees, this helps to keep the fuselage level in fwd flight. the result however is slightly nose high attitude in the hover. there are some that have a slight left or right tilt as well, (not as much or as noticeable as the fwd tilt)
my blackhawk, Apache, EC145's, EC135, airwolf, MD500, 407 Seaking all have the fwd tilt built in to give the right attitude in the hover as per the fullsize. the mechanics are mounted in the fuslege at the angle required is how that is achieved. the woodwork i make for mounting the mechs in mine is constructed with the angle built in.

drive a rotary, fly a rotorcraft

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12-17-2013 06:32 PM  3 years agoPost 4
don s

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Chesapeake, VA

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I have to tilt mine forward but I was thinking that while I was at it, I could tilt the shaft to the side. But then the tail rotor would be tilted also. May not be worth it.

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12-17-2013 07:53 PM  3 years agoPost 5
goodhunting

rrApprentice

Slovenia ...​somewhere in Europe

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just out of curiosity (and laziness) what is the angle of the fwd tilt in AH64 Apache?

gh

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12-17-2013 08:07 PM  3 years agoPost 6
joeb56

rrApprentice

Newcastle,NSW -​Australia

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seems most of them are 4 deg I believe
I try and get 4 deg both forward and depending on rotation port or starboard

On the J curve of all things Heli, I am still going down hill, FAST

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12-17-2013 08:08 PM  3 years agoPost 7
adamsz06

rrVeteran

Geilenkirchen​Germany

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I may be wrong, but I think it's 3 degrees forward.

R.I.P. Roman

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12-17-2013 08:35 PM  3 years agoPost 8
Copter Doctor

rrProfessor

Enterprise/ft.rucker​,al- home of army​aviation

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while I was at it, I could tilt the shaft to the side. But then the tail rotor would be tilted also. May not be worth it.
yeah it wouldn't be worth doing the side tilt,besides, it looks cool when a heli hangs one skid low anyway
both the apache and the Blackhawk have about 3 or 4 degrees tilt

drive a rotary, fly a rotorcraft

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12-17-2013 08:46 PM  3 years agoPost 9
goodhunting

rrApprentice

Slovenia ...​somewhere in Europe

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OK thank you for the info.
saved me some google time...

gh

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12-17-2013 09:31 PM  3 years agoPost 10
darrelluh1b

rrApprentice

Dalton Ga

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Just my two cents. In the past I would tilt the mast foward but I found the heli did not fly as well as when the mast was at zero.

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12-17-2013 10:35 PM  3 years agoPost 11
torque

rrKey Veteran

bolivia , north​carolina

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the bell longranger and 407's main shafts tilt 5 deg. to the front

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12-18-2013 03:57 AM  3 years agoPost 12
MDSCUSTOMS

rrApprentice

North Wales, U.K.

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Likewise for the Bell 222 - also has 5 degrees forward tilt.

Mark

I'm only here coz I'm not all there !!

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12-18-2013 10:18 AM  3 years agoPost 13
wrongler

rrProfessor

Brewerton, New York

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I wonder if it would help aerodynamically being tilted forward for speed?

Bill Whittaker

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12-18-2013 02:46 PM  3 years agoPost 14
don s

rrElite Veteran

Chesapeake, VA

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I think it would allow the fuselage to present the smallest forward cross section during forward flight.

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12-18-2013 02:55 PM  3 years agoPost 15
torque

rrKey Veteran

bolivia , north​carolina

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if I remember correctly from going to numerous bell schools, the tilt is to put the heli in a more level attitude while in forward flight.

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12-18-2013 03:15 PM  3 years agoPost 16
wrongler

rrProfessor

Brewerton, New York

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With the canopy designs that are made for speed, would a tilted head help increase speed?

Bill Whittaker

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