Jon Berndt writes:

 > > I agree -- JSBSim is reporting a positive normalized position for
 > > a negative input (and vice-versa).  Obviously, we've made
 > > allowances for that in the model animations, but it's
 > > inconsistent with the behaviour elsewhere.  I'll look into fixing
 > > it.
 > 
 > Before making changes, can you elaborate on this "problem"?

1. FlightGear uses a negative value for left rudder input.

2. JSBSim internally uses a positive value for left rudder deflection.

3. JSBSim publishes the rudder surface position back to FlightGear
   with positive for left rudder.

No change to the JSBSim core was required -- I just multiplied
FCS->GetDrPos(ofNorm) by -1 before passing the value to the FlightGear
property.


All the best,


David

-- 
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/

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