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Bug #22883

Kerbal G-Forces calculated from craft center of mass, not kerbal location

Added by Ruedii almost 5 years ago. Updated about 4 years ago.

Status:
Confirmed
Severity:
Low
Assignee:
Category:
Physics
Target version:
-
Start date:
06/14/2019
% Done:

10%

Version:
Platform:
Linux, Windows
Expansion:
Breaking Ground, Core Game
Language:
English (US)
Mod Related:
No
Votes:
Arrow u r green
Arrow d r red

Description

When Goofing off with the rotors from Breaking Ground, I made a few amusement rides. Who hasn't thought of doing it.

I was hoping to make my kerbals pass out from G-Forces but I ran into an interesting bug:

It seems the G-Forces for kerbals aren't calculated from where the Kerbals are but from where the center of mass is.

This means that the centrifugal force of a rotating rotor with the kerbal command pods on the side, create no Kerbal G-Forces.

To replicate the behavior:
1. Create a nice little centrifuge with a heavy duty rotor in the center, mounted to the ground with launch clamps, with two pods off to the side.
2. Switch Command to one of the two side pods.
3. Spin up the Centrifuge to about 200RPM (Higher than that will often result in it tearing itself apart)
4. Note that neither G-Forces, nor kerbal G-Forces increase.

Expected behavior:
G-Forces should be read properly and the kerbal in the command pod should pass out.

Spinner Test 2.craft (40.2 KB) Spinner Test 2.craft Example craft Ruedii, 07/19/2019 03:36 PM

History

#1 Updated by Ruedii over 4 years ago

I Finally got around to making a really nice example craft. (Something I would be proud to post.) Sorry about the wait.

I also wanted to make sure the bug was not fixed in the rollout fixes before bothering with the additional time and effort.

#2 Updated by just_jim over 4 years ago

  • Status changed from New to Confirmed
  • % Done changed from 0 to 10
  • Platform Windows added

Nice test craft. And yes, the Kerbal's are apparently not registering any G-forces.

#4 Updated by just_jim over 4 years ago

  • Assignee set to just_jim

#5 Updated by just_jim about 4 years ago

  • Severity changed from Normal to Low

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