Bob, congrats on your service to the country when serving at Cannon.
Yes, living at this 4,300 feet elevation is a little different but I've been able to make the best of it when flying.
The OS .15FP-S is a good and powerful engine but heavy, would be better in a plane that has at least 100 more square inches or so I gather, something around 300 square inches. I imagine your Super Tigre is similar.
George, thanks for the inputs. I gather an 8x3 prop would also be good for the Fox .15-X, except that no one seems to make that one any more. I'm wondering if a 7x7 prop might also work, will have a better chance of experimenting when I give it a shot.
I really love the Enya .09-III's, they are a fantastic and powerful engine. I also found that to hand start, they seem to love the lighter inertia wood props. They put out plenty of thrust on a 7x6 prop. They compare very well with the plain bearing sport Schneurle .09's and .10's when properly propped.