Curtis L. Olson wrote:
> it seems to be more than a simple coordinate system difference,
> unless JSBSim/YASim swap X/Y axes or something strange like that.

Could be a bug, too.  What exactly is the behavior you're seeing?  The
way the code in steam works is to look at the Y and Z "pilot
acceleration" vectors and compute a "down" direction.  Is it the
direction that's wrong?

* Not the same as coordinate acceleration, for the reasons discussed
  before. And it shouldn't use X, which is the longitudinal axis.  The
  ball is constrained by its housing to the YZ plane.

The steam.cxx code is the only place that uses these numbers, so a bug
could easily have gone unnoticed.  I haven't looked at the ball in a
while, honestly, but I don't remember being surprised by anything
looking wrong.

Andy

-- 
Andrew J. Ross                NextBus Information Systems
Senior Software Engineer      Emeryville, CA
[EMAIL PROTECTED]              http://www.nextbus.com
"Men go crazy in conflagrations.  They only get better one by one."
 - Sting (misquoted)


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