Hi fellas, I'd like to jump in here with my observations on Quadra 50's. I have a Quadra 52, and I can tell you the Quadra is not even in the same class as the other 50 cc engines out there. The Quadra 50 will never turn a 20" prop with any authority. Dick Bennett of B&B Specialties, advised me years ago to try an 18x8-14 Zinger on it and he was correct, until I broke the airplane, a 20 lbs. monoplane, it would pull it straight up from straight and level to 300 ft. before it would stall, and fall. Before it was a 52 it was a 50, Bennett has a conversion kit that helped. Before that the best prop for that was an 18x10.

I was really interested in Bass's experiments with the Brison 3.2. I to have a Brison 3.2, my plane is an Edge 540, weighs 17 lbs. so it is a pound lighter than yours, and again, Dick Bennett advised me to use a 22x6-10 Zinger. The ignition went away yesterday, so while installing another module, I checked the RPM and it was at 6500 rpms. and will go straight up forever. I know you guys like the exotic stuff, but my for my money, I can't see the justification. The Top Flight propellor in 22x6-10 is quieter, and on my Mustang seems faster.

Just my .02

Dale