Ship falling when a rotor is connected

Blaank shared this bug 33 days ago
Won't Fix

If a rotor is connected to your ship with a load on it, and you are in a natural gravity well, the ship's inertial dampeners will not hold it up. I do expect it to drag one side of the ship down slightly more than the other (due to torque), but the dampeners should still be able to hold this ships mass + rotor mass up off the ground. I also would expect gyroscopes to know when the rotor is exerting a rotational force on the ship and then be able to automatically fight it.


This also affects turning using gyros. the ship will roll and pitch and yaw in undesired directions based on where the excess mass of the rotor subgrid is.

Replies (4)

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Attached is the save including a craft displaying the bug.

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This is a longstanding issue, I believe there's other tickets for this. IIRC the "jitter" in the rotor's connection to the main body of the ship causes the main body to get pushed around very slightly. In a gravity well, this jitter trends downward, so although the math for the thrusters can accommodate the added mass of the rotor, it's unable to handle the added jitter of the joint pulling the two bodies around and will gently drift downwards. As a stopgap, you can drop into a hover mode using AI flight blocks.

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Hello Blaank,

thank you for reaching our forum with this problem.

Can you please double check the file that you have provided?

It appears as a blank save with no grids or anything present in the game at all. Also there are no back-up saves so I could not try that neither.

Make sure that you provide correct safe file with the grids ready and already in place, please.

Thank you.

Kind Regards

Keen Software House: QA Department

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Hello Engineer,

As there has been no reply to this thread in some time, we will close it. If you're experiencing this issue, please create a new thread.

Kind regards,

Keen Software House: QA Department

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