Hi Durk I don't know if you have actually got the A/C to sit on the ground correctly yet.But I have got both the 747 and MD11 to sit correctly by making sure the CG figure is no further back than 850 X units and the MLG figures also no further back than 850 X units any further back and the model does not sit correctly. See below for extracts from both my config files
747
AC_EMPTYWT 398500
AC_CGLOC 850.3 0.0 -69.6
AC_AERORP 850.3 0.0 30.0
AC_EYEPTLOC 194.8 -32.0 100.0
AC_VRP 850.3 0 -50
</METRICS>
<UNDERCARRIAGE>
AC_GEAR NOSE_LG 361.7 0.0 -180.9 262546.0 87515.3 0.5 0.8 0.02 STEERABLE NONE 5.0 RETRACT
AC_GEAR LEFT_MLG 870.5 -228.3 -180.9 875153.5 175030.7 0.5 0.8 0.02 FIXED LEFT 0 RETRACT
AC_GEAR RIGHT_MLG 870.5 228.3 -180.9 875153.5 175030.7 0.5 0.8 0.02 FIXED RIGHT 0 RETRACT
</UNDERCARRIAGE>
MD11
AC_EMPTYWT 378363
AC_CGLOC 800.5 0.0 -60.2
AC_AERORP 800.5 0.0 0.0
AC_EYEPTLOC 168.7 -30.0 75.0
AC_VRP 0 0 0
</METRICS>
<UNDERCARRIAGE>
AC_GEAR NOSE_LG 313.3 0.0 -170.2 189181.7 63060.6 0.5 0.8 0.02 STEERABLE NONE 5.0 RETRACT
AC_GEAR LEFT_MLG 850.5 -183.1 -170.2 630605.7 126121.1 0.5 0.8 0.02 FIXED LEFT 0 RETRACT
AC_GEAR RIGHT_MLG 850.5 183.1 -170.2 630605.7 126121.1 0.5 0.8 0.02 FIXED RIGHT 0 RETRACT
</UNDERCARRIAGE>
Why this happens I don't know I will send an email to David Culp and
see if he has any ideas.
I don't know if you are interested but I grabed a MD11 from
FS 98 from Simviation just so at least the model looked like a
MD11.
If you are not familiar with using FS98 models give me a yell.
Durk Talsma writes
On Saturday 24 April 2004 14:50, Erik Hofman wrote:
> Innis Cunningham wrote:
> > Also the further back you put the CofG the higher off the ground the A/C
> > seems to start.
>
> This almost sounds like and axis mismatch. Is the gear located in the
> structural frame or in the body frame?
>
It actually reminds me that during one of my tweaks I noticed that I found the
aircraft to flip-over sideways, while I was only moving either gears or CoG
forward or backward. I didn't give it much thougth then, and therefore don't
remember the exact parameters that made this happen. But, would it be
possible than that specifically in the JSB trimming routine somehow.
I feel it's still a bit premature, but if anybody wants to play with the MD11
files, I could offer them for cvs inclusion. Who should I send them to? Curt?
Erik?
Cheers, Durk
Cheers Innis
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