SailNet Community - View Single Post - Repower confusion (horsepower)
View Single Post
Old 02-03-2013
SloopJonB's Avatar
SloopJonB SloopJonB is offline
Senior Moment Member
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 11,146
Thanks: 59
Thanked 56 Times in 53 Posts
Rep Power: 4
SloopJonB will become famous soon enough
Re: Repower confusion (horsepower)

JR, the old rule of thumb of 4 horses per ton would put you at 52 HP in cruising trim.

Of more importance than the horses is the torque and its curve. Are those horses Clydesdales or Quarter horses.

If the torque curve of the Beta gives you adequate grunt at 2800, you really don't need more. The 4 per ton "rule" goes back to the days when sailboats pushed a lot more water out of the way than they do now. My friends Hunter 38 is probably about 20K Lbs in cruising trim with a Yannie in the 30's - it has lots of power at 2800 in that application - we've never needed to run it to 3000 even when bucking our local currents.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
Reply With Quote Share with Facebook