> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of 
> Vincent Trouilliez
> Sent: Friday, January 21, 2005 10:22 AM
> To: flight-gear
> Subject: Re: [Flightgear-users] Re: Flying Helicopters ?
> 
> 
> > I feel that two things are "wrong".
> > 1) If I....
> > 2) If I....
> 
> If I may add a third point to my own post, there is another 
> little thing about the Heli FDM that I don't quite 
> understand. When I start the game, sitting on the runway, I 
> set the collective to zero, then start the engine. The Heli 
> then start moving around, slowly turning coutner clockwise on 
> the runway. How comes ? With the collective set to zero, I 
> was expecting the Heli to be completely immobile, firmly laid 
> on the ground. :o(


Sounds like a ground reactions problem. Ground reactions are very difficult
to model in a helicopter sim. There are different forces on all three gear,
and they are different than what are experienced by a fixed-wing aircraft. 

Bill



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