I've got RSS(11.1.0), MechJeb2, Kerbal Engineer Redux(1.1.1.0) and FAR(0.15.6.3) installed on 1.1.2.
I'm not getting any Terminal Velocity reading (infinitym/s).
It happens the moment I install FAR. With just the rest its fine.
It should be easily reproduce able.
If you would like the log file I'll upload it.