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Hmmm, Tricky.
David culp sent me the relevant source code.
I'll take a look at it and see what I can do.
Nickolas Hein
Morgantown WV
----- Original Message -----
Sent: Saturday, November 15, 2003 3:48
PM
Subject: RE: [Flightgear-devel] Airport
vehicle (driving) sim
Good afternoon again.
I just remembered another trick about
zero-speed rolling models. Below a threshold speed (say 1 m/s) you
make the force proportional to the velocity. That way you'll get zero
force at zero speed. The other thing that can happen if you don't is
that you'll oscillate about the zero speed point. This will stop that
oscillation.
Hope it helps
What if you have wind? Then, your aircraft is experiencing forces and
moments, yet the vehicle is not able to oppose the forces and moments if it is
stationary. You get an equilibrium drift.
Been there, tried it. Didn't work.
The way I am leaning is to model it similar to the way the Langley C++
sim does it. At low speeds, the XY plane gear forces are *made* to cause
the aircraft to follow a specified path and rate determined by the gear
characteristics and known turning radius. This means though that even a
tornadic wind would not move the aircraft sideways.
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