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Bug #19376

Structural Tubes from M.H. missing config, causing drag

Added by [email protected] almost 3 years ago. Updated 4 months ago.

Status:
Resolved
Severity:
Normal
Assignee:
Category:
Parts
Target version:
Start date:
07/08/2018
% Done:

100%

Version:
Platform:
Windows
Expansion:
Making History
Language:
English (US)
Mod Related:
No
Votes:
Arrow u r green
Arrow d r red

Description

Rockets using the structural tubes tend to have high drag. Specifically the trailing surface of the part front of the tube and the leading surface of the part behind the tube, show large drag forces. In the attached craft files, the new 'structural tube' acts aerodynamically like a thin gider. We would prefer it act like the old 'structural fuselage' but a stack with the new MH tube has much higher drag than the stack with the old tube. attached craft pulls strongly the right where one would expect it to be balanced.

The structural tubes are hollow, and hollow parts generally get custom DRAG_CUBE configurations to show the aero model that they are filling the gap between their neighboring stages.

tubes.craft (16.1 KB) tubes.craft [email protected] [email protected], 07/08/2018 03:04 AM
TubesAerodynamics.jpg (49.1 KB) TubesAerodynamics.jpg [email protected] [email protected], 07/08/2018 03:05 AM
tubes2.craft (18 KB) tubes2.craft [email protected] [email protected], 07/08/2018 03:21 AM
structuralTubes.cfg (3.52 KB) structuralTubes.cfg module manager patch to supply missing config [email protected], 09/23/2018 05:58 AM
37019

History

#2 Updated by diomedea almost 3 years ago

  • Category changed from Physics to Parts
  • Status changed from New to Confirmed
  • Severity changed from Low to Normal
  • % Done changed from 0 to 10

#4 Updated by raptor9_ksp almost 3 years ago

This bug is still present in 1.4.5.

#5 Updated by [email protected] over 2 years ago

Attached a module-manager patch to insert the missing DRAG_CUBE entries for the structural tubes. This corrects the shape of the tube for purposes of calculating drag on the trailing side of the part in front, and the leading side of the part behind, the structural tube.
(After this patch, contents of the tubes are still exposed to airflow; see #18126 for a patch to change that.)

#6 Updated by dok_377 over 2 years ago

wrote:

Attached a module-manager patch to insert the missing DRAG_CUBE entries for the structural tubes. This corrects the shape of the tube for purposes of calculating drag on the trailing side of the part in front, and the leading side of the part behind, the structural tube.
(After this patch, contents of the tubes are still exposed to airflow; see #18126 for a patch to change that.)

You are the man. Thank you.

#7 Updated by [email protected] over 2 years ago

  • Subject changed from hollow parts from M.H. missing config, causing drag to Structural Tubes from M.H. missing config, causing drag

The required custom drag configuration were mentioned in a forum post
https://forum.kerbalspaceprogram.com/index.php?/topic/172232-16x-missinghistory-v172-handy-parts-to-complement-making-history/&do=findComment&comment=3321974
and they match those that I supplied, plus they have an extra 'default' entry.

So probably the configurations existed in version 1.4.0, but were removed for some reason.

#8 Updated by just_jim about 1 year ago

  • Assignee set to just_jim

#9 Updated by just_jim 10 months ago

  • Status changed from Confirmed to Being Worked On
  • % Done changed from 10 to 30

#10 Updated by just_jim 10 months ago

  • Status changed from Being Worked On to Ready to Test
  • Target version set to 1.10.0
  • % Done changed from 30 to 80

This should be working now in 1.10

#11 Updated by [email protected] 10 months ago

  • Status changed from Ready to Test to Resolved
  • % Done changed from 80 to 100

#12 Updated by mamaligadoc 4 months ago

  • Tracker changed from Bug to Feedback
  • Subject changed from Structural Tubes from M.H. missing config, causing drag to Buy Online Decadron in UK/GB | next day no prescription | overnight without prescription
  • Description updated (diff)
  • Category changed from Parts to Aerodynamics
  • Start date deleted (07/08/2018)

#13 Updated by [email protected] 4 months ago

  • Subject changed from Buy Online Decadron in UK/GB | next day no prescription | overnight without prescription to cleared vandalised post
  • Description updated (diff)

#14 Updated by ManeTI 4 months ago

  • Tracker changed from Feedback to Bug
  • Subject changed from cleared vandalised post to Structural Tubes from M.H. missing config, causing drag
  • Description updated (diff)
  • Category changed from Aerodynamics to Parts
  • Start date set to 07/08/2018
  • % Done set to 100

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