help with models and centre of mass problems

[JavelinJoe]

right so ive got a model, put it in blender, split it up then put it toghether in unity blah blah, exported it and placed it in my game, now heres the problem, ive done this with 3 different models of 3 different aircraft, and they all have really really wierd centre's of mass, nowhere near the plane, which means i cant fly them, heres a screenshot of the aircraft and its wierd centre of mass....https://dl.dropboxusercontent.com/u/5527081/Help.jpg.... can anybody help me put the centre of mass elsewhere, nearer the middle of the body you can see?, thanks

[angusmcbeth]

did you place the models at 0,0,0 in blender and unity?

[EndlessWaves]

The center of mass defaults to being at the scene origin. You can change it in the part node (config file) using the CoMOffset parameter (three numbers as you'd expect)