Railguns on hinges causes klang

I do sometimes use Midspace's Speed mod but this was happening regardless of the mod being loaded. The world shown in the video is attached and labeled Star System, I also attached a brand new empty world that hasn't had any mods loaded since it also occurs there.

Hello, Exoterminator!

Thank you so much for the saves. I have blueprinted the issue grid and can reproduce it every time upon paste. For some reason, when I recreate the item it does not happen. I can report the blueprinted item but may be asked to reproduce the grid. I'm trying to determine if it is just the particular grid you have created that is causing the issue or, if you are recreating it each time and are doing something different to me. Could you please clarify? When I recreate the grid, I am only having it circler slightly. I am unable to check any settings on yours because of course it goes quite crazy on either save load or, blueprint paste. I hope this makes sense!

Kind Regards

Laura, QA Department

The shaking happens for me both when pasting the blueprint and when building it block by block. When built block by block it seems to only have a small chance of triggering by itself but will seemingly always trigger once a hinge lock is turned on or off. I can get it to happen with just a row of 5 blocks, 3 hinges and 3 railguns. The tipping tip seems to be once a 3rd railgun is placed onto a hinge as 2 railguns and 3 hinges doesn't make it happen. Changing torque values can sometimes make it happen, more often increasing them above default, but changing the lock state has been the main way of causing the shake.

I've attached a short video showing the hinge options and then a small wobble once turning hinge lock on and the shaking after turning it off.

Hello, Exoterminator!

Thank you for the video, I can see exactly how you reproduced the issue. Thank you for the information. I have reported this internally :)

Kind Regards

Laura, QA Department

Can reproduce with both pasted BP as well as rebuilt and pasted grid.

Note: Rebuilt and pasted grid is normally perfectly still, so it does not necessarily show the issue. However, if you "throw" the BP while placing it, or if you bump another large grid into it after placing, to initiate some motion, the grid becomes unstable almost immediately and shakes itself apart.

It's also not limited to that particular build, or to hinges, or to railguns.

It seems that any fork-like arrangement (with at least three tines) of long and heavy subgrids is prone to that issue. And the larger and heavier the tines become, and the greater their inertial moment becomes on account of their weight distributed over a great length, the more sensitive the grid becomes, especially when the grid is powered and the rotors or hinges actively control or resist movement. Eventually, simply placing it is enough to start its destructive feedback.