These videos takken Sunday April 15th with precious payload onboard...this is why we designed and built the Rumble!
We tested the stock four blade 9.25X10 which kept us from bumping up against the rev limiter as was the case with the three blade 9.25X9 so our top end rose to 24 mph but time to plane increased somewhat...all in all, a very nice afternoon for mid-April in western PA.