Re: Ground limit and 3D model

> Yes. The A320 features these :
> 
>   <UNDERCARRIAGE>
>     AC_GEAR NOSE_LG    196.1    0.0 -138.2  100000  5000 0.8 0.50 0.02
> STEERABLE NONE   5  RETRACT
>     AC_GEAR LEFT_MLG   688.7 -144.4 -142.0  150000 12000 0.8 0.50 0.02
> FIXED     LEFT   0   RETRACT
>     AC_GEAR RIGHT_MLG  688.7  144.4 -142.0  150000 12000 0.8 0.50 0.02
> FIXED     RIGHT  0   RETRACT
>     AC_GEAR TAIL_1     987.0    0.0   -55.7 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR ENG_1      515.4  226.2  -104.3 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR ENG_2      515.4 -226.2  -104.3 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR WING_TIP_1 846.1 -667.6   -37.4 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR WING_TIP_2 846.1  667.6   -37.4 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR NOSE_TIP     0.0    0.0     0.0 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR NOSE_TOP   131.6    0.0    92.6 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR TAIL_TOP  1382.6    0.0   340.0 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>     AC_GEAR TAIL_TIP  1476.7    0.0    58.9 1500000 60000 0.2 0.2  0.02
> FIXED     NONE   0   FIXED
>   </UNDERCARRIAGE>


Cool I get the idea... it makes sense!

The only problem is that I am modeling an RC aircraft weighing 6.5 kg
and 2.2m span. Any idea what the spring constant and damping
coefficient of the wing tips and tail skid could be?
My under-carriage has a spring constant of 20 and a damping
coefficient of 10 (from a quick differential equation calculation).

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