Bug #14633
When two long ships are docked, the resulting ship starts to uncontrollably wobble very fast and break into few parts (not undocks, breaks with damage).
0%
Description
I docked two long ships on Kerbin's orbit and the resulting ship started to uncontrollably wobble. It was a very fast and severe wobble, exceeding the ship's diameter. Within seconds from docking, the ship broke in half - with some part being separated from it and thrown somewhere into space. It's important that it didn't undock the docking port, but it was broken somewhere in the middle, with the mentioned part missing.
How to reproduce the bug:
The ship which I tried to dock is Komo 9 Uku 8 Kente 2 and the ship I wanted to dock to was Komo 9 Akalan. They are both orbiting Kerbin, very close to each other - the attached persistent save was made just a moment before docking attempt (or actually recovered after the kraken attack using the attached quicksave).
History
#1
Updated by Fifi about 7 years ago
Updated by - File Komo 9 Akalan.craft Komo 9 Akalan.craft added
- File Komo 9 Uku 8 Kente 2.craft Komo 9 Uku 8 Kente 2.craft added
- File Komo 9 Kemge.craft Komo 9 Kemge.craft added
- File Komo 9 Konolym 4.craft Komo 9 Konolym 4.craft added
- The "Komo 9 Uku 8 Kente 2" on orbit is actually made of "Komo 9 Uku 8 Kente 2" (that small Soyuz-like utility spacecraft) docked to "Komo 9 Kemge" (that cargo of space station connector modules with attached orbital tugs). It's like this, because I forgot to add any power supply to that space station modules cargo, so it switched off its remote guidance units and I couldn't dock it to anything (so I sent this little ship with solar panels and two kerbals).
- The "Komo 9 Akalan" on orbit is made of "Komo 9 Konolym 4" tractor transfer module (by tractor I mean that it drags the cargo, instead of pushing it - I hoped it will reduce the wobble, oh well xD) and "Komo 9 Akalan" space station habitation module docked to it.
The overall plan was to drag a few space station modules to Laythe in one mission, in some sort of short space train (I thought that dragging things should produce less parts stress and wobble than pushing them), hence the unusual design.
I suspect the cause of this bug may either be an earlier bug, related to ship wobbling after reaching orbit, which I reported* (I was told to use autostruts instead of struts to fix the issue - so far this solution worked well, but looked a bit unrealistic) or some autostruts issue.
(*) I think it was issue 12665 - but I can't confirm this, because when I open the bookmark, the page says that I'm no longer authorized to access this page (probably because it was a bug from older version of KSP or something).
#2
Updated by bewing about 7 years ago
Updated by Yes, sorry, the first issue was #12665, but that issue has been archived.
Did you turn off all the reaction wheels except one? Is the total number of autostruts on all the combined ships less than six? (You might be able to use a few more than 6, but you have to keep the number very low!)
A very long ship will wobble in real life. Making them shorter and wider also reduces wobbliness.
#3
Updated by Squelch almost 7 years ago
Updated by - Severity changed from Critical to Normal
Please do not use critical. See our guide for how priorities are set.