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my mark V has its #1 and #2 reefing lines running through the boom with the forward ends exiting through fairleads and leading to rope clutches on the cabin top. Now, the aft ends exit the boom, lead to the reefing grommets on the mainsail, then lead down to tie on the boom. So when you reef, the angle of the reefing line is such that it doesn't pull the grommet straight down to the boom, but leaves it up a few inches. So, I wonder if there should be a cheek block on the boom so that the reefing line can be led to pull perfectly vertical?copasetic
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Last edited by (2007-07-14 02:28:29)
Copasetic
The reefing system on the Mark V is designed so that the out board end will act as an outhaul as well as a downhaul to keep the sail as flat as possible. The Reefing line should lead from the exit at the aft end of the boom, up through the Leech Reef Point and back down to the boom, it is then lead through an eye strap on the side of the boom and tied with a tight bowline around the boom. The tighter you tie the bowline the closer you will be able to get the leech reef point to the boom when you put in the reef.
Steve
Still Knot Working MkV #75
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About 2 years ago when my Mark V was new to me, I asked about putting a cheek block on the boom so the reefing line would pull the grommet at the reef point directly down to the boom. The answer at the time -to summarize- was the cheek block was not necessary. Last week, in 20+ kts of breeze, we used reef#2 and a 135 jib, sailed with about a 10-15% heel-maybe 20 deg. in gusts. Good boat speed upwind, not so great down. At the mooring, we noticed a tear in the sail at the grommet. Closer inspection showed that there had been a patch installed over the tear by the previous owner. So what happened was that the patch gave way under the tension of the reef. Small tear, easy fix, no big deal. A pessimist could have imagined a bigger tear developing.
In any case, I do think that if I had stuck to instincts and installed a cheek block so the reef line would pull the grommet down to the boom, this tension tear would not occur.copasetic
I've been wondering the same thing. The PO had stainless S hooks at the end of the #1 and #2 reef lines which hook directly to the grommets. I did a #2 reef during a gusty Wed night race a week ago and although boat performance and sail shape were spot-on, I thought the force on the grommet thanks to the angle of the reefing line was excessive. I wondered then if a cheek block would help too. The current set up requires one to grind the winch to set a good reef.
Brent Driedger
S/V Wild Rover
C&C 27 MkV #15
Brent Driedger
S/V Wild Rover
C&C 27 MkV #15
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