I'm not sure if this change never actually fixed this or if there is something else happening but I'm having this problem with KSP 1.3.1, USI Tools 0.10.1.0, ExpPack 0.9.0.0 and no other mods installed, it happens at dampenSpeed (35m/s with small and medium and 53 with large airbags) I opened https://github.com/UmbraSpaceIndustries/UmbraSpaceIndustries/issues/124 about this. I'm not set up to compile for source to test if its just that this is somehow missing from the released dll
Also Let me know if I did anything wrong in the issue or if I should include anything else.