I have been running your Whirl Wind AB400 propeller now for several months on my airboat. The 4 blade 82″ Stump Puller on a Lycoming GSO540 upstack. I must say that I have tried others in the mean time, and this propeller is simply the best hands down. It is quieter for starters. Not near as much vibration as we all know that some other props have.
But the main thing is the performance that it offers. Much snappier!! Lets you feel the G forces when accelerating!! Tons of push!! Makes hill climbing a snap.
Yes, I have tried all the others. Since I built this boat myself I wanted to find the best performing propeller on the market and without a doubt the Whirl Wind SP prop has been the best performing prop that I have found in all aspects.
Thank you so much for an awesome product!!!”
(AB400 Series)
-Tyler Clasen, Hudson, FL