I was checking out a little cut-away of a JSF. The JSF's lift fan is spun from a shaft running into the front of the engine, and the engine also produces thrust out the back of the engine. My question is this, could a chopper use the same type of setup? On the chopper, you could replace the turbo-shaft with a jet engine that has a shaft to main blades being driven off the front of the engine and use the engine's thrust to provide most of the forward motion. You could probably fly at least 300mph.
Well, that's my question based on my little (or no) knowledge.