SailNet Community banner
  • SailNet is a forum community dedicated to Sailing enthusiasts. Come join the discussion about sailing, modifications, classifieds, troubleshooting, repairs, reviews, maintenance, and more!

Main sail foot vs boom length

4K views 8 replies 5 participants last post by  Barquito 
#1 ·
When slack, my mainsail clew is within maybe 3"-4" of the end of the boom. There doesn't seem to be enough room to fit a block in there for an outhaul, and still have room to tighten the thing much. Does this seem right?
 
#3 ·
Does your boom end cap have a sheave? It may be designed for an internal outhaul tackle. Or you could use microblocks and smaller diameter but high breaking strength line for an external outhaul. That's the setup I have, two micro triples (one with becket), giving me lots of mechanical advantage.

I don't think the outhaul is normally under tremendous amounts of stress, unless you've got a loose-footed main.
 
#4 ·
Outhaul loads are similar, if not the same, whether the sail is loose footed or not... in fact the friction of a bolt rope foot can make the outhaul harder to move..

It does sound as if your range of adjustment is a bit low.. it's possible the sail was meant for another boat and it was a 'close fit' when someone bought it (probably second hand?) or if not the sailmaker should have paid attention and done it properly.

But as indicated above, even 3-4 inches of adjustment will be helpful and on a non racing boat perhaps totally adequate. In all likelihood your tackle is on the weak side and you may be pressed to get full extension there anyhow.
 
#5 ·
I don't have a picture handy, but, the end of the boom just has a fitting with a couple holes in it. Nothing goes through the boom. I tried putting a small block between the boom-end and the clew cringle. There was little room left for adjustment. I'm guessing the sail may have been made a little too long in the foot, or the boom a little short. I think the original Bristol 27 had a furling boom. Mine isn't. I could just lash the clew directly to the boom end, but it wouldn't be adjustable, and may be difficult to get enough mechanical advantage to get it tight.
 
#6 ·
It's possible to set up an outhaul tackle externally if you need to, aft from the clew to a block on the boom end, and down one side of the boom to a cleat.. you could even run the end down to near the gooseneck so you can easily adjust it with the main eased out on a run or a reach.

Here's an example from Harken: I'd probably move the aftmost block further aft a bit...

 
  • Like
Reactions: jackdale
#8 ·
Barquito,

I have the same outhaul system that Faster shows. I have a 26 ft C&C and the 4:1 outhaul is easily adjusted, so I expect it would be fine for your 27 footer.
I don't know this for sure, but I would have thought that a Bristol 27 would have a black band around the aft end of the boom to show the class length for the mainsail foot. This should tell you if the sail is too long in the foot.
Keep the outhaul control in the cockpit - it is an essential sail trim device and will be a pain if you have to go the mast every time you need to alter it.
(I once met a sailor in a race who told me he'd never moved his outhaul since he bought the boat. He didn't win much!)
 
#9 ·
The Harken link didn't come through on my computer, but, I see it on their site. That is just the solution I was looking for. With that setup I can pull the clew right up to the end of the boom. Do most cruisers have the outhaul run all the way back to the cockpit? I would like to have everything in the cockpit, but, expense and coach roof space dictate otherwise. Right now, the first reef is CLEATED on the boom well aft (I am going to run that back to the cockpit).
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top