Project

General

Profile

Bug #27593

Retrograde burn does not decrease orbital velocity

Added by Uncle_Saba 7 days ago. Updated 4 days ago.

Status:
New
Severity:
Low
Assignee:
-
Category:
Physics
Target version:
-
Start date:
04/30/2021
% Done:

0%

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

Description

When loading this craft in my savefile, I am attempting to do a retrograde burn to form an orbit around Minmus. I have aligned the craft with the retrograde icon on my navball, but firing the engines does not decrease my orbital velocity, rather increasing it. If I flip my craft around to do a prograde burn instead, my orbital velocity still increases. This leads me to believe this is some kind of a physics bug.

20210430045055_1.jpg (501 KB) 20210430045055_1.jpg Beginning a small test burn Uncle_Saba, 04/30/2021 02:22 AM
20210430045107_1.jpg (499 KB) 20210430045107_1.jpg The orbital velocity has increased despite retrograde orientation Uncle_Saba, 04/30/2021 02:22 AM
20210430050859_1.jpg (294 KB) 20210430050859_1.jpg Version information Uncle_Saba, 04/30/2021 02:22 AM
20210430045138_1.jpg (485 KB) 20210430045138_1.jpg Map mode shows the large discrepancy between expected orbit and actual orbit Uncle_Saba, 04/30/2021 02:22 AM
Mk Y 2 Munar.craft (158 KB) Mk Y 2 Munar.craft Craft used during the mission Uncle_Saba, 04/30/2021 02:32 AM
weird velocity bug.sfs (573 KB) weird velocity bug.sfs Save file Uncle_Saba, 04/30/2021 02:32 AM
Player.log (710 KB) Player.log Second session, bug replicated here Uncle_Saba, 04/30/2021 02:43 AM
Player-prev.log (1.4 MB) Player-prev.log Original session, bug encountered for the first time Uncle_Saba, 04/30/2021 02:43 AM
hardinfo_report.txt (53.3 KB) hardinfo_report.txt Uncle_Saba, 04/30/2021 02:44 AM
56811
56812
56813
56814

History

#1 Updated by OHara 4 days ago

In the savefile 'weird velocity bug.sfs', it looks like the nav-ball is set to use as its control point a docking part on the side of the rocket.
That docking port is pointing retrograde, but the rocket is not.

If I right-click on the command pod and select 'control from here' the nav-ball orientation changes, and then if I rotate the craft to the command pod is pointing retrograde, the rockets slow down the craft relative to Minmus, as expected.

Also available in: Atom PDF