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Bug #20348

Request 6547: Bug report: Incorrect Burn Time Information (v. 1.5.1)

Added by jason.p.dworkin@gmail.com 7 months ago. Updated about 1 month ago.

Status:
Closed
Priority:
Low
Assignee:
-
Category:
Gameplay
Target version:
Start date:
11/05/2018
% Done:

100%

Version:
Platform:
OSX, Windows
Expansion:
Core Game
Language:
English (US)
Votes:
Arrow u r green
Arrow d r red

Description

I believe I have found a bug where the burn time using the Puff monoprop thruster. If the only form of propulsion is the Puff monopropellant thruster is available and a maneuver node is set, the estimated time instantly goes to a constant value (different for different ships, but does not change with the ∆V of the maneuver) and the indicator for insufficient fuel is shown. If both Puff and another thruster is present, the ∆V from the Puff is ignored. Happens on crewed and robotic craft. All tests done without cheats and in sandbox mode.

How to reproduce:
  • Have a spacecraft with Puff thrusters and sufficient fuel
  • Plan an maneuver node with non-zero ∆V required.
Notes:
Happened on a fresh install with no mods (save file, four craft files, and a screen shot with each craft attached) as well as on install with Making History expansion
  • Observed with and without the advanced staging indicator
  • Observed with different kinds of tanks, numbers of thrusters, and with fuel lines and the presence or absence of liquid fuel
  • Appears object independent in orbit around Kerbal.

(Also, there is a great deal of spacecraft wobble when using Puff engines under stock configuration, but that may be a feature.)

Puff Tester 2.craft - Capsule in Kerbal orbit exhibiting the problem (25.5 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:54 AM

Puff Tester.craft - Probe in Kerbal orbit exhibiting the problem (39.7 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:54 AM

Puff Tester3.craft - Probe in Kerbal orbit exhibiting the problem with different parts (54.6 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:54 AM

screenshot0.png View - Screenshot of Puff Tester showing the problem (419 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:56 AM

screenshot1.png View - Screenshot of Puff Tester 2 showing the problem (734 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:56 AM

screenshot2.png View - Screenshot of Puff Tester 3 showing the problem (628 KB) jason.p.dworkin@gmail.com, 11/05/2018 02:56 AM

Puff Tester4.craft - Probe in Kerbal orbit exhibiting the problem with both monopropellant and bipropellant thrusters (31.7 KB) jason.p.dworkin@gmail.com, 11/05/2018 03:21 AM

persistent.loadmeta - Metadata of save file of the fresh install and the 4 spacecraft (361 Bytes) jason.p.dworkin@gmail.com, 11/05/2018 03:22 AM

screenshot3.png View - Screenshot of Puff Tester 4 showing the problem after having depleted the bipropellant (617 KB) jason.p.dworkin@gmail.com, 11/05/2018 03:23 AM

persistent.sfs - Save file of the fresh install and the 4 spacecraft (186 KB) jason.p.dworkin@gmail.com, 11/05/2018 03:26 AM

1.5.1 Puff.png View (621 KB) Anth12, 03/30/2019 02:51 AM

1.5.1 Thud.png View (619 KB) Anth12, 03/30/2019 02:51 AM

1.6.1 Puff.png View (809 KB) Anth12, 03/30/2019 02:51 AM

1.6.1 Thud.png View (809 KB) Anth12, 03/30/2019 02:51 AM

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History

#1 Updated by diomedea 7 months ago

  • Status changed from New to Confirmed
  • % Done changed from 0 to 10

Confirmed on KSP 1.5.1.

#3 Updated by joshua.collins 5 months ago

  • Status changed from Confirmed to Ready to Test
  • Target version set to 1.6.0
  • % Done changed from 10 to 80

Please recheck this in 1.6.0.

#4 Updated by Anth12 about 2 months ago

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Testing with 1.5.1 and 1.6.1 shows this is fixed according to burn time.

The craft was in a 100,000 orbit and then the maneuver was to extend that out to 1,000,000

The craft had thuds and puffs. I tested it for both and they worked the same. I timed the actual burn time which was perfect.

Added screenshots to show changes between when the puffs were activated and the thuds were.

Also did testing with one engine configurations.

Resolved

#5 Updated by chris.fulton about 1 month ago

  • Status changed from Resolved to Closed

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