I have experience running a 15p 4 blade powertech OFS. I lost about 3mph compared to my enertia 15P on the top end and it was slower at cruise too. 15P OFS has good sternlift. Rev4 has more sternlift (IMO) than the OFS and is usually a bit faster in my experience. Both Rev4 and Powertech OFS are slower props but have great bite (large surface area). Propping hulls requires a bit of voodoo magic, so make sure the engine height is set correctly (cavitation plate clearly visable . . . out of the water when on plane) before you start messing with props.
See post from June.
http://www.classicseacraft.com/commu...t=28644&page=9
Quote:
Originally Posted by Bigshrimpin
Tried a powertech 15P four blade OFS and lost 3.5 - 4mph on the top end . . . could only turn 5250rpm @ 35.5mph. 15p enertia is WAY better. Terry the 17P is packaged up and will go out tomorrow.
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