I have managed to get some more flying in the Flitzer this morning and can report my findings. The aircraft seems to get off the ground quicker with your prop and initial climb is good. I flew level with full throttle and there is an increase in cruise of 4 mph to 91 mph. This gives 3000 rpm on the gauge which corrects to 3300 actual. I did aVNE dive with no problems. The prop is much smoother in flight than the previous prop.
This afternoon was one of those special occasions when the weather gods came up trumps. I should have worn warmer clothes but that didn’t detract from the half hour of magic in the air. I counted 16 hot air balloons also enjoying the experience.
Hercules prop is performing very well with a 5 mph increase in top speed, a shorter take off roll and a much smoother running engine. In fact it felt like I was in the 17th balloon it was so smooth!