board winch
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grandillusion
- Posts: 172
- Joined: Tue Oct 31, 2006 12:42 am
- Location: South Havenish
board winch
216 currently has Lewmar 16 2 speed winches on the coach roof, I am planning on upgrading to stbd./ keel lift one to a self tailing model but it seams the ST's are only 1 speed unless you step up to a 30 and that seems a little too big for a secondary winch on a 7.9 any input would be helpful as always
S2 7.9 216, H 16 80127, Star 6188
I set up a couple of 7.9s with by using Harken #311 sheaves to replace all of the plastic ones, and a modified Harken #308 [added a homade becket with another small high load block on top for one more purchase] and went to 1/4 " line. The sheaves had to be shimmed with fender washers on both sides to stay in the middle of the housing and keep the line from over riding. A better method would have been to take a 3" hole saw and cut circles out of coffee can lids. Anyway, the friction was reduced so much that I could SIT in the cockpit and lift the keel with one arm [self tailer]. Going to a two speed winch adds cost, weight and winching turns but doesn't address the real problem: Lousy sheaves and blocks, too large a line diameter and not enough purchase to begin with.
One note. On both of these boats the keel came up so easliy that the well intentioned but overzealous crew winched the small high load block up into the lifting bracket and deformed/destroyed it. Apparently, they stopped winching when they couldn't make it move anymore, instead of when they got tired! I did some research and found a small, high load fiddle block or two from Ronstan and Lewmar that would probably take the place of the Harken #308 and smaller high load block to do the same thing, albeit with more friction.
Dave
One note. On both of these boats the keel came up so easliy that the well intentioned but overzealous crew winched the small high load block up into the lifting bracket and deformed/destroyed it. Apparently, they stopped winching when they couldn't make it move anymore, instead of when they got tired! I did some research and found a small, high load fiddle block or two from Ronstan and Lewmar that would probably take the place of the Harken #308 and smaller high load block to do the same thing, albeit with more friction.
Dave