Reply To: What size propellers??

Hi, on Kala Kai which has a central Perkins Perama rated at 18HP the original fitment was two three blade 11X8 Radice props. These worked well and pulled about 3500 revs. Max speed was about 6.4. I changed these a few years ago for two Varifold props at 12×7 as 12 is their smallest size. Reverse performance and stopping suffered considerably and max speed fell to about 6 knots. Sailing performance and rudder response was improved however. If I was based in a marina or used them regularly I might consider going back to the three bladers, as it is I am happy to have the extra performance and 'feel' of the folders. Hope this is of some use, but past experience even on much bigger vessels shows that prop selection is something of an art rather than a science!
Good Luck.
Pete