On Thu, 2009-11-19 at 09:37 -0700, dave perry wrote:
> I believe that the position on the ground should be totally determined
> by the gear compression forces and the mass and cg. I.e. it will
> correct itself once we implement correct gear compressions. So don't
> mess with rotating the 3d model. At least let me try to get it right
> with gear compressions.
A quick look using JSBSim standalone shows a pitch (theta) angle of 0.6
degrees using the default loading of a single 180 lb pilot.
Lowering the nose gear three inches, to z=-23, gives a theta angle of
3.9 degrees.
Adding a 180 lb copilot, two 180 lb passengers and 30 lbs luggage gives
a theta angle of 5.0.
Thanks,
Ron
--- Aircraft/c172p/c172p.xml 2009-11-19 11:30:00.000000000 -0700
+++ Aircraft/c172p/c172p.xml 2008-12-14 14:33:47.000000000 -0700
@@ -96,7 +96,7 @@
<location unit="IN">
<x> -6.8 </x>
<y> 0 </y>
- <z> -23 </z>
+ <z> -20 </z>
</location>
<static_friction> 0.8 </static_friction>
<dynamic_friction> 0.5 </dynamic_friction>
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