I am toying with teh idea of using a single-rotor turbo-normalized mazda
with reduction-drive and was wondering if there are any builders out there
who have checked out the same possibility? I'm only looking for around
100-120 hp, with weight an obvious consideration.

The only name I have heard of regarding a flying single rotor is Gerry Hess
up here in Canada somewhere. Could anyone point me to his email address?

Cheers & thanks
Pete