On Sunday 27 November 2005 05:19 pm, Martin Spott wrote:
Sets correctly the VRP at the nose :
Yep, the VRP appears actually to be located at the nose, but the offset
to the CG is still missing :-)
Have a try, look at the aircraft from an outside view (chase view w/o
yaw), activate the HUD and see where the center of the HUD points at:
It points at the nose whereas it _should_ point at somewhere near the
wing root, actually at the CG. Currently the FDM still 'thinks' the CG
is at the nose.
One thing that may be confusing is that the VRP setting given by aeromatic is
wrong. In the JSBSim configuration file If the CG location is X, Y, Z,
then the VRP location is -X, -Y, -Z.I had thought that AC_VRP defines the
location of the VRP, however it actually defines the location of the VRP
*from* the CG (?). I never noticed it in the T-38 and other smaller
airplanes because the effect is hard to see. In a big airplane like the 1049
you can see it.
The above may seem authoritative, but I'm really only 90% sure it's correct :)
I know you have all been waiting impatiently for another VRP thread.
Dave
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