I started working on a new Patriot capsule. After installing RCS, fuel tanks, Astronauts, seats, Control Panel, the capsule just starts spinning out of control. I have tried deactivating the capsule, turning all the electrical off, and RCS. It spins quite fast too. My guess is about 15-20 rotations/sec.
Any ideas or fixes anyone might have?
The only thing that sounds odd is: new seats and control panel? Never heard of adding those to one of the stock spacecraft.
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Otherwise nothing in your post indicates anything that should cause this behavior. A deeper inspection will be required.