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RotResistance combined with gravity gradient torque causes a CTD Issue Tools
issueid=1362 03-14-2018 03:43 PM
RotResistance combined with gravity gradient torque causes a CTD

Hello, we have identify a possible bug in the latest Orbiter beta (171010). Working in NASSP I have been getting a mysterious CTD shortly after insertion (MET ~16-18 minutes) and we have traced it down to the following:

-The Saturn 5 inter-stage is jettisoned off during launch and falls back into the ocean. When it reaches the thicker parts of the atmosphere, it starts to spin around and then the CTD happens at that point.

-In the Saturn 5 inter-stage config file we have the RotResistance parameter and that combined with the "gravity gradient torque" option enabled in Orbiter, is what seems to cause the CTD.

The CTD does not happen if we either remove just 1 of the 2 conditions or if we remove both (take out RotResistance from the .cfg, disable gravity gradient torque)

This is what the config file looks like:

; === Configuration file for vessel class Saturn 5 Interstage ===
ClassName = sat5intstg4
MeshName = ProjectApollo/sat5intstg4
Size = 10.0

Mass = 1500 ; empty mass [kg]
COG_OverGround = 2.0

; === Atmospheric flight model ===
CW = 0.5 1.1 2 2.4
CrossSections = 50.35 53.75 11.19
RotResistance = 2.0 2.0 2.0
Inertia = 19.65 19.45 1.45

EnableFocus = FALSE
Issue Details
Project ORBITER: 2010-P1 and newer
Status Unconfirmed
Priority 3
Affected Version Revision denoted in description
Fixed Version (none)
Users able to reproduce bug 0
Users unable to reproduce bug 0
Assigned Users (none)
Tags (none)


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