Looking for some advice regarding prop choice. I have a Humber destroyer 6m with an 150 optimax. At present it has a ballistic 21 pitch and 13 1/8 diameter I can get 45 knts @ 5200 rpm. i have damaged the prop and now get 42knts @ 5150 rpm. Any suggestions for a replacement prop to get a bit more speed?
I would suggest a SS Powertech like PTC3 or PTC4 in 19" pitch to raise a bit the RPM, 5200 is too low.
Or the OFX3 or 4, a fantastic prop for those who like running WOT on rough sea, they get another boat with this prop, more stable and usable in any conditions
