On Sat, 6 Mar 2010 21:36:28 -0800 (PST), bizguy
wrote:

You could look at outboard motors as a starting point. In the past I
read of someone using a Mercury to get 100 hp in an aircraft.
Harold
Had a 100HP Evinrude V4 I was thinking of putting in a plane - untill
I remembered all the problems I'd had with 2 strokes in boats, lawn
mowers, mototcycles, weed-eaters, and chain saws over the years.