STG. When I did all my testing I got 12lbs 2ozs on the 16x6 at 9600 RPM and 12lb 0ozs on the 16.5 x 5W at 8400 RPM. Engine only had about 10 minutes of run time on it. However I've since learned I was unable to see the full pull strength because of the way I was hooked up. Today, at the field, one of our engineering guys was helping me. I only had the 16x6 prop but we held on to the plane with no friction and we took the readings again. This time I got 13 lbs 4ozs with teh Showtime and 13lbs 0ozs with my brand new (never run before) 110 in my UCD. This pleases me a lot more. I think some of the guys are reporting 15lbs thrust but I never expected that at my elevation. I'm at 4800' and I'm using 30% heli fuel and it was just of 80 degrees. These numbers are pretty good I think. When I get time I'm going to do the 5W again. My guess would be 13lbs 2 ozs or so. If I could spin it 9000 RPM I would feel better 8400 or 8500 is just too slow I think. At sea level I'll bet it would be another story.
Thanks,
Barry