It looks like we're almost there with the surface positions.  JSBSim
and YASim are using the following properties, apparently in the same
way:

  /surface-positions/elevator-pos-norm
  /surface-positions/flap-pos-norm
  /surface-positions/left-aileron-pos-norm
  /surface-positions/right-aileron-pos-norm
  /surface-positions/rudder-pos-norm

There is what might be a JSBSim config-file error for the C310: when
the ailerons are centered, JSBSim reports
/surface-positions/right-aileron-pos-norm at -.677422, which is
clearly wrong; the problem does not occur for the C172.

The only inconsistency left is gear position:

  JSBSim: /gear/gear[n]/position
  YASim:  /gear/gear[n]/position-norm

They both agree on using 1.0 for down and 0.0 for up, though, and
that's good news.  As soon as this last problem is fixed, I'll switch
the animations over and we'll have smooth flap and gear movement.  In
fact, if the FDM people want to get really clever, they can have the
gear retract and extend slightly out of sync so that they lock up or
down about .5 sec apart.


All the best,


David

-- 
David Megginson
[EMAIL PROTECTED]


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