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Rigging question. |
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JimC
Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6649 |
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Topic: Rigging question. Posted: 27 Jan 19 at 7:40pm |
It really doesn't matter where you sheet it, for the same sheet load you'll have the same amount of rope. Try modelling it with string and you'll see what I mean. 2:1 end of boom, 4:1 mid boom, it's the same amount of string.
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 27 Jan 19 at 7:55pm |
The 4to1 system I have on at the moment is attached a quarter of the way along boom from mast, the mainsheet is very short, hardly any mainsheet to speak of when going upwind, this is why I thought mixing existing 4to1 with a feed along boom and down to a traveller would reduce amount of rope in cockpit compared to 'Laser' set up.
Will follow advice and experiment with both systems.
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JimC
Really should get out more Joined: 17 May 04 Location: United Kingdom Online Status: Offline Posts: 6649 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:14pm |
You might just about get away with bridle to boom, without a purchase. We used that on Cherubs back in the 80s, but on the Moth I felt I needed the extra. I tried a lot of options. Another possibility might be to move the bridle forward a bit. It doesn't necessarily have to be right at the stern.
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:26pm |
Tiller is quite long, so could certainly be moved forward, will have a look.
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:30pm |
Standard aft main works fine with the Minisprint. I expect you have used it on the Enterprise?
Oddly, I'm thinking if going the opposite route on Minim,putting a 4:1 behind the dagger board case. Thinking about a dagger rudder, which would be easily caught on an aft main. Would a boom made from a Mirror mast be strong enough? |
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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Sam.Spoons
Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3398 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:37pm |
Moving the bridle forward might mean you'll be sitting on it (which is much more uncomfortable than you might expect) offwind in extreme conditions.
If your existing 4:1 is only 25% back from the mast it is roughly equivalent to 1:1 off the back of the boom. the 3:1 centre plus 1:1 aft setup in your drawing will increase both the purchase and the mainsheet working length by 1.75 (so nearly twice the rope) but will significantly reduce the sheet loads. Using a 2:1 at the back minimises the number of blocks and is more efficient but you would end up with even more rope. Maybe it is worth trying a sort of semi-centre mainsheet with the take off and bridle a bit forward? But if you could get used to off the boom then a ratchet at halfway along the boom and a 1:1 at the back would give you 1.5:1 which might be the best compromise (and only two friction inducing blocks).
Edited by Sam.Spoons - 27 Jan 19 at 8:40pm |
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:43pm |
Rupert,
I used a 'Skipper mast. |
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Sam.Spoons
Really should get out more Joined: 07 Mar 12 Location: Manchester UK Online Status: Offline Posts: 3398 |
Post Options Quote Reply Posted: 27 Jan 19 at 8:48pm |
I've always hated aft mainsheets (which were almost de-riguer when I started sailing, the OK with a centre mainsheet was pretty modern back then).
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Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish" |
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Rupert
Really should get out more Joined: 11 Aug 04 Location: Whitefriars sc Online Status: Offline Posts: 8956 |
Post Options Quote Reply Posted: 27 Jan 19 at 9:01pm |
Seems to depend upon what you grew up with. As a Firefly sailor, I had to spend time learning centre main when I converted my British Moth in the 90s. Each has its benefits, and there is no intrinsic speed difference.
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Firefly 2324, Puffin 229, Minisail 3446 Mirror 70686
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423zero
Really should get out more Joined: 08 Jan 15 Location: United Kingdom Online Status: Offline Posts: 3406 |
Post Options Quote Reply Posted: 27 Jan 19 at 9:03pm |
Me too, I can't get the hang of it at all.
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