Hi, I am running a 28 ft Scorpion rigid inflatable with 2x300 verados spinning 21p Rev4s.
Recently repowered the boat from its 2x250 hpdi's (blew them) and the extra weight of the verados squats the stern down - It's a light and slim hull, less than 3000 lbs and 8 ft across, really designed for lighter engines...
I have the engines at the right height (I think, or maybe a touch too high) and get a prop slip of 10%. Boat reaches 67 mph at 6200 wot, and cruises at 44 mph at 4500 rpm.
I love the speed and love the engines, but I need props that would lift the stern more. Do you have any suggestions? How about 5 blades?

Contact B Blades, they will guide you in the right direction.

I had a giirl ask me about stern lift once... I told her to try spanx...

Anybody ever tried partially filling a rib with helium???

Thanks Phragle - High Pressure Ice Coffee out my mouth. JAckass ! LOL !

Lol

I prefer hydromotive, everything they have suggested has worked for me.

Have you tried to spin the props inward?

Helium won't work. It's small molecule size escapes the tube seams too quickly - at the pressure these are supposed to work. Some people use Nitrogen and report 3-4 kts pickup.

How would I do that?
Why would it work?