SailNet Community - View Single Post - Fixed vs folding prop
View Single Post
post #2 of Old 03-25-2012
Junior member, rest old
msmith10's Avatar
Join Date: Feb 2009
Location: Columbus Ohio
Posts: 499
Thanks: 3
Thanked 1 Time in 1 Post
Rep Power: 9
Re: Fixed vs folding prop

Not a simple question and as far as I know there's no simple answer or formula. Folding prop will be faster, that's about all you can say. 2-blade, 3-blade? Wind speed?
At hull speed it won't make any difference. In light air it will. If you spend most of your time racing, you'll want the folder, but then again if you race a lot you probably have one already. If you race occasionally but have to motor 3 miles up a river against 4 knot current to get back home, you may just decide to eat the speed loss. If you'd prefer to motor than sail when the weather gets rough, go with the fixed blade.
If I recall, PHRF gives you 8 seconds per mile for a 2 blade folder over fixed, 12 seconds for a 3 blade. It will cost you more than that, otherwise every racer would have a fixed prop.
If I had the money for a saildrive, though, I'd definitely spring for a feathering prop (slightly more drag than folding but better performance).

Mark Smith
1977 C&C 30 Mk 1 hailing from Port Clinton, Ohio
msmith10 is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome