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boom main sheeting

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Bobbins View Drop Down
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    Posted: 10 Jun 05 at 5:56pm
Someone explain whats so good about having the mainsheet coming straight off the boom (via blocks etc)?  As this removes any chance of having a jammer on the line for those knackered arm moments, I'm guessing the benefits outweigh this?
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Jon Emmett View Drop Down
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Post Options Post Options   Quote Jon Emmett Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 5:59pm
On the 49er you are always playing the main. When trapezing low the mainsheet would rub against the wing if it came from the deck, by coming off the boom it keeps less friction in the system and makes it easier to move across the boat. The general trend is for twin tillers and sheeting off the boom, for better performance.
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Post Options Post Options   Quote Garry Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 7:52pm
On many classes you also take the sheet off the boom in light conditions to get more feel and also not to tension the leech as you sheet in. Watch Ben Ainsle downwind in the Finn at the last olympics he's sheeting straight off the boom in quite windy conditions.

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Post Options Post Options   Quote redback Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 8:06pm
Getting rid of the strop or strut gives a lot more room in the boat and makes it easier to move forward or the crew to move back.  The down side it twin tillers.
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Post Options Post Options   Quote Jon Emmett Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 8:34pm
I would disagree and say that twin tillers is definitely a positive!
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 9:23pm
Originally posted by Bobbins

Someone explain whats so good about having the mainsheet coming straight off the boom (via blocks etc)? 

Some more points...
  • Mainsheet load helps out tired legs/stomach muscles hiking.

  • Because you can't jam the mainsheet you don't jam the mainsheet so you play it properly which is far faster than leaving it jammed.

  • Less blocks - less friction. OK its an extreme case bit on my Cherub the mainsheet goes through two blocks, one on the end of the boom and the ratchet in the middle. So free running, so much less effort.
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Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 05 at 9:28pm
Originally posted by JimC

Originally posted by Bobbins

Someone explain whats so good about having the mainsheet coming straight off the boom (via blocks etc)? 

Some more points...
  • Mainsheet load helps out tired legs/stomach muscles hiking.
  • Because you can't jam the mainsheet you don't jam the mainsheet so you play it properly which is far faster than leaving it jammed.
  • Less blocks - less friction. OK its an extreme case bit on my Cherub the mainsheet goes through two blocks, one on the end of the boom and the ratchet in the middle. So free running, so much less effort.

 

You also gain a purchase !

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Post Options Post Options   Quote hurricane Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jun 05 at 9:57am
it makes it easyer to play the sail thats why ainsley was doing it
lifes to short to sail slow boats!

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Post Options Post Options   Quote ssailor Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jun 05 at 12:42pm
You have a much directer fell over the sail and playing it is alot easier - in the case of the skiffs - 49ers, 14s etc the crew takes it upwind, with 2 hands to play the sail , and the helm free to sail accordin to the gusts it is much faster than the helm tryin to do it all at once!! Off the boom is also a much nicer angle when trapezing than off the floor malarkey, and it also frees the boat from all useluss clutter!!
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Post Options Post Options   Quote NickA Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jun 05 at 10:43pm

Additional to Jim C's excellent reasons......

....on a boat with a transom main sheet strop (eg a 29er or laser 2), off the boom sheeting makes it possible to pass a really long tiller extension through the boat when tacking.  And sticking with transom strops make it possible to use a lighter boom while still maintaining leach tension.  

On my Laser 2 the tiller extension length is limited by the positon of the main sheet running through the block on the floor to a little less than you need when out on the wire.  And if you move the strop to the middle, the boom snaps.  So sheeting off the boom should really help (keep meaning to try it).

Finally, if the Bethwaites say it's a good idea, it probably is!

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