Carlos:

A great light dawns... you're gonna build a rocket ship!

Wow... an OS61! I flew my Tiger on a Magnum 46 XLS, 10x6 or 11x5 prop. There was plenty of power, and while vertical wasn't unlimited, it went up far enough for me. The combination I always wanted to try was the Tiger and a Magnum 52 2S. One of our club members has that engine mounted in a flat wing trainer similar to a Nexstar, and the thing just screams. My other thought for yours was an OS 55 AX. I've got its big brother, an OS 75 AX, in my UltraSport, and I can't say enough good things about that engine. I'd almost think the 61 would be too much power.

I've currently got a TF Beech Bonanza and Wing Mfg B-25 sharing space on my table. Both are being slowed by (you guessed it!) gear door engineering and installation.

Fred