I was just wondering - has anyone ever made a working turbocompounded
rotary? Or if not, then from my standpoint as a young entrepreneur, what
would it take to build one? Something along the lines of a
turbocompounded two or three rotor plus turbocharger, perhaps with a
system to provide extra boost at takeoff, like methanol injection or such.

Would anyone on this newsletter be interested in working on such a
project? And what would you require in order to facilitate doing so?

I can't help but think this is would be a potentially revolutionary
technology, and definitely a area where some money could be made, so I'm
just wondering what it would take to see it done.

- Trevor C

Not yet. NASA studied the heck out of it.
http://www.rotaryeng.net/NASA-Paper-turbo-compound-rotary.pdf
See appendix C

My wild ass guess is a couple of hundred thousand.
It depends somewhat on what kind of shop tools and skills you have.
An NC mill and lathe would be a big plus.

Paul Lamar