Originally Posted by Alexwalms
Any propeller gurus in here?
I have a Revenger 27 with a Suzuki 300, previously had a 24p 4 blade prop and was hitting 48 knots at 6300rpm.
I’ve just fitted a 26p scorpion 3 blade prop and hitting 48 knots at 6050rpm but the boat is feeling unstable at wot.
My guess is this new prop is giving too much stern lift causing a bit of chimewalking?
I went for the 3 blade prop to get a bit more top end speed and hopefully improve fuel economy but now thinking of going back to the 4 blader
I’m a big fan of 4 blade props, every RIB I’ve owned always felt more “planted” with a 4 blader. Dunno if that’s my imagination or reality. That said, 4 bladers generally give more stern lift, which puts more of the keel in the water & (imho) adds to the grip, whilst taking a bit off the top end. Which is what you’ve discovered. I’ve tried a few 4 blade props over the years & the “best” I’ve found is the Mercury REV4 which was recommended to me by the legendary Mike Vincent of South Coast Marine.
All my opinion naturally.