For JSBSim Movement, how to edit the “Structural Frame Origin” property so that it matches with the 3D model geometry you used.


I feel so confused about that,I want to use c130 plane,but don’t know how to calculate them.

for example,in 787-8 plane ,Structural Frame Origin” is(-49.422097,0,355.5),and Nose Gear Contact Point is -809.50058 0.00 -143.36872 ,I can’t see any relationship between the two numbers,can anyone tell me how to solve this please