Hmm,
if you mean this: http://www.thrustmaster.com/de_DE/produkte/hotas-warthog i have to say thats the same i use in our lab and the plugins works well til UE 4.13. If i can (have time), i will check this next week. I have to update the binaries for newer versions.
t.
Update:
Update all binaries for UE 4.15+ for Plattform Windows (32,64).
Test with Thrustmaster HOTAS was ok. I got all all axis and buttons from joystick and throttle.
If you need a Demo Project with configured plugins send me an PM.
t.