At the moment the rotation happens at the approximate coordinate of the engine. It should happen at the centre-of-mass. We can influence the rotation of the object when moving the engine, but collisions (for example) should affect the object at its centre.
At the moment the rotation happens at the approximate coordinate of the engine. It should happen at the centre-of-mass. We can influence the rotation of the object when moving the engine, but collisions (for example) should affect the object at its centre.