I also have extremely low unplayable FPS in the Chinook, in the cockpit its about 10-20 fps where for example in the Apache its over 100 fps.
Switching between F1 and F2 views also causes the game to hang for about 20 sec.
I have found NOT running the MultiThreaded application just the regular I get much better FPS/performance in the cockpit. Does anyone else experience this?