[gurps] Autogyro performance

[Brandon Cope]

I'm still considering this, but not actively working
on any designs right now. My goal was two just create
two fictional WWII autogyros (a four-man and an
ultra-light one man) I'm not going to need either
design for a few weeks so I've been working on other
stuff.

*If you are wondering why autogyros instead of
helicopters, the pilot PC's player made the
suggestion).

Brandon