Paul,

Are you interested in advancing  your 2 place VTOL concept. I would,

http://www.rotaryeng.net/VTOL.html

We have done a lot of similar work in the LOGO “.Guardian”.

Thanks,

Larry Gordon

Gordon Trading Inc.


Sure what do you have in mind?

Paul Lamar

This is the way to do a tilt rotor: http://bellv280.com/
The transmission pivots the rotor instead of the whole drivetrain. On a
small aircraft, the cross shaft would be driven and angle drives would
drive
the rotors.  The rotor shafts would be hollow for control rods to the
rotors.  This has been done before, check this out:
http://en.wikipedia.org/wiki/Bell_XV-3
I saw this aircraft at Wright Patterson.

Steve Brazil


These aircraft are more difficult to fly because one rotor can get in a
ring vortex state
causing the aircraft to roll over. That has happened several times in
the V22.

One rotor is safer.

Paul Lamar


This is true of any vehicle with a high disk loading.  Even a conventional
helicopter can get in this predicament.  I think the Navy calls it settling
under power.  The remedy is to fly forward to get out of the ring vortex.
Where the tilt rotors get in trouble is if they try to turn while in this
state and one rotor gets out and the other doesn't.  They have to be careful
when they hover close to the ground and fly straight ahead if they see this
condition developing.  Every aircraft has its limitations and quirks.

Steve Brazil





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