B27
Well-known member
Mine seem to be some slightly stretchy line, I don't see any need to adjust them.
Does a lazyjacks system need to be fixed so high on the mast?
- Thread starter PaulGS
- Start date
GHA
Well-known member
Every boat's different
Poignard
Well-known member
I used a very scientific method of working out where to fit the cheek blocks on the mast.
I wandered round a marina looking at other similarly rigged boats.
It worked out fine.
I wandered round a marina looking at other similarly rigged boats.
It worked out fine.
Ray Purchase
Member
Ours worked fine set at the top cross trees out of two.
Daydream believer
Well-known member
Which probably is not far from the 70% suggested by Tranona, ages ago, in #6
Ray Purchase
Member
In our case closer to 75% but I'm not nit picking.
LittleSister
Well-known member
The instruction for fitting the Barton Lazy Jacks Kit states they should be suspended from a position 70% of the length of the mainsail luff above the boom (and Barton are presumably well experienced in the matter and keen to minimise complaints and people coming back to them with issues).
That is broadly confirms what I think most people have been saying above, though it is measured slightly differently.
I would caution the OP from doing anything wildly different from the norm, unless he is content to reposition them again later if it doesn't work out.
He might find other parts of the Barton instructions a useful starting point (or at least food for thought), too.
https://bartonmarine.com/pdf/Lazy-jack-kit-for-yachts-up-to-9m-part-no-41150.pdf
That is broadly confirms what I think most people have been saying above, though it is measured slightly differently.
I would caution the OP from doing anything wildly different from the norm, unless he is content to reposition them again later if it doesn't work out.
He might find other parts of the Barton instructions a useful starting point (or at least food for thought), too.
https://bartonmarine.com/pdf/Lazy-jack-kit-for-yachts-up-to-9m-part-no-41150.pdf
Daydream believer
Well-known member
Chiara’s slave
Well-known member
Same as us then. And yes, Mrs C just watches the leech as she steers, and issues the command to hoist at the right time. Once the leech is through the lazyjacks, she can start to bear off onto the desired track.
johnalison
Well-known member
I stand astride the tiller and hoist while watching the sail and steering at the same time. When the sail passes the lazy jacks I free the mainsheet and continue as far as I can. With luck my crew will then winch up the last few inches and tension it. It is actually a bit easier with some wind, which makes the sail flap and work its way heavenwards.
Chiara’s slave
Well-known member
Our sail, as you might imagine, is heavy for a 30 footer. Battens, cars, much heavier cloth than you’d find on a 30 foot mono. The main halyard is 2:1, which makes hoisting slightly less strain, but on the other hand there’s about 25 metres of rope to haul. I’d have to stick the autopilot on if I was alone. An aside, for the topic though. What I’ve got from the thread is that the position of your lazyjacks on the mast is unimportant. What works for you is good.
LittleSister
Well-known member
Glad to hear that you do not have nits
Have you not considered the possibility that he does have nits because he failed to pick them?
GHA
Well-known member
Will depend on how far down the boom the fixing points are in relation to the height of the fixings on the mast as well, just zapped mine with a laser, any lower the outside tab sewn onto the bag would be putting all the stress on one corner of the stitching.
Chiara’s slave
Well-known member
However, if ypur bag is made for a lower fixing, and different angle, all is well. The lines go through loops on our bag without strain. They’re fixed on the boom as well.
GHA
Well-known member
They measured, they made. No discussion of fixing height on the mast when I got mine made. It works just great, another game changer single handed . Any lower it wouldn't sit right, too much lateral load & not enough vertical.
Chiara’s slave
Well-known member
It fits, it works for you. Our system is built around the lower attachment. That fits, and works for us. The key is obviously to have everything designed to work together. If we suddenly decided to attach ours to the next diamond up, it would tear the tapes off the bag. Just like the reverse would do to yours.
GHA
Well-known member
what are the angles on yours? Might be similar. Your attachment tabs must be an odd shape for the resultant force to be outside the base if the force angle goes higher.
Though if it works it works, who cares. Every boat's different
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B27
Well-known member
Not sure it needs to be that technical.
It's two panels of canvas hanging from three strings each, via some mediocre line.
You make it sound like Nora Batty's underwear.
Chiara’s slave
Well-known member
I’ve not paid it that much attention before, TBH. It’s one thing on the boat we have not changed apart from having a new bag made, identical to the old one. A side on photo would show what goes on, but it’s not the kind of photo you take, unless you’ve got problems. But our rearmost line runs in a straight line from the boom attachment, via a webbing loop on the bag, to the 1st block. The bag therefore just hangs there waiting to receive the sail. It’s not rocket science, just some obvious geometry.
Daydream believer
Well-known member
Why is it heavy? I would have thought that for a tri it would be light weight. That is, after all, part of its performance advantage off the wind. My fully battened fibrecon mainsail on 31 ft mono is 8oz cloth & that should be plenty for a 30ft lightweight boat. My last dacron sail was 7oz