Jim Wilson said:
> Mathias Fröhlich said:
>
> >
> > Well, my first guesses were wrong, but I have found what JSBSim does now:
> >
> > The code in question is in FGJSBSim::do_trim():
> >
> > if ( fgGetBool("/sim/presets/onground") )
> > {
> > fgic->SetVcalibratedKtsIC(0.0);
> > fgtrim = new FGTrim(fdmex,tGround);
> > } else {
> > fgtrim = new FGTrim(fdmex,tLongitudinal);
> > }
> >
> > At initialization time /sim/presets/onground is true, at reset time it is
> > false.
> > It lookes like tGround triming also adjusts the height of the aircraft so
that
> > it does not get pushed into the air by the gear springs. Whereas
> > tLongitudinal triming does not adjust the altitude.
> >
> > Just taking tGround triming all the time fixes the reset issue. But this is
> > obviously not the right fix here.
> >
>
> Did you trace this in a debugger? fgGetBook("/sim/preset/onground") is
> definately true at the time the reset key is hit....otherwise that hack I
> posted earlier would not work.
>
Nevermind, I see it gets changed in fgInitPosition.
Best,
Jim
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