Spacecraft moment of inertia calculation error
This is a very disturbing bug that I found,
I made a spacecraft as shown below. Although the weight of the large ring and the support rod has been set to 0, it is very difficult to rotate the object when it rotates around the central axis. This shows that when the object is rotating, the game's computing system does not correctly determine the mass of the object, which makes the rotational inertia of the entire spacecraft very incorrect. This makes my spacecraft unable to adjust its posture normally, which is very annoying.
Note: My rcs is on both sides of the main body of the spacecraft. When I don't place a large ring whose mass has been adjusted to 0, the rotation is very smooth.
Is this a bug? I hope to hear from you soon, I would appreciate it
The moment of inertia of the object cannot be calculated correctly in SR2
1,300
haogejiuhaoge1
4.8 years ago
Bug
Rejected
Found in 0.8.402.0
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3 Comments
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Dev AndrewGarrison4.8 years ago
The problem is that the fuel tanks making up the ring are placed into the same rigid body as the rocket so when that rigid body calculates its inertia tensor, it includes the extra dimensions of the ring (but not their mass) which results in a large moment of inertia. One way to address this is to insert a part that forces the ring to be in a seprate body, such as a rotator. This is an example of how to do that.
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@AndrewGarrison Ok,thank you very much