Maik Justus wrote:
 > there is a minor bug in YASim in the gear code. The sfric and dfric
 > tags in the aircrafts .xml are ignored.

I didn't even know those were tunable.  Actual tires have a very
narrow range of friction coefficients, except for special cases like
"knobby" off-road tires or special surfaces like ice or water.  Did I
add this code?  But I agree, taking those lines out looks right to me.

 > Maybe this helps to solve the slipping of parked aircrafts (by
 > adjusting sfric).

Very unlikely.  The slipping is a numerics effect, not a modeling one.
The only way to get the gear jitter to produce a stable solution over
time is to push the coefficients *down*.  But that will produce more
slipping, not less.  The solution to this problem is a rewrite of the
static gear friction to use a damped spring model around a "stuck"
point.  But that's hard for the case of rolling gear.

Andy


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