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Difference in mast rake between 1 and 2 up

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scooby_simon
(@simonJlongstaff)
Posts: 3496
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Topic starter
 
[#19218]

Planning to sail 2 up On Sunday, How much more mast rake should I add.

(John, just need to put the prodder on and add the blocks etc on the pole)


 
Posted : January 17, 2007 11:17 am
pdwarren
(@pdwarren)
Posts: 462
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If it sails anything like my Blade, none at all. I have much more weather-helm sailing 2-up than I do sailing 1-up. Although you'd expect the jib to move the centre of effort forward, it seems that this is not a big factor, and what really makes a difference is the increase in forces.

I'm planning to move my mast another notch *forward* next time I go out 2-up.

Paul


 
Posted : January 17, 2007 12:48 pm
scooby_simon
(@simonJlongstaff)
Posts: 3496
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Quote
If it sails anything like my Blade, none at all. I have much more weather-helm sailing 2-up than I do sailing 1-up. Although you'd expect the jib to move the centre of effort forward, it seems that this is not a big factor, and what really makes a difference is the increase in forces.

I'm planning to move my mast another notch *forward* next time I go out 2-up.

Paul

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I'd agree, expect to need to rake more not less....

Guess we'll see on Sunday !


 
Posted : January 17, 2007 1:56 pm
(@Anonymous 38002)
Posts: 130
 

The original owner of my boat seemed to mainly sail it 2 up. I set it up using the same forestay length he used although I mainly sailed it 1 up - I ended up shortening the forestay by 2 or 3 inches to make the weather helm bearable!


 
Posted : January 17, 2007 7:04 pm
ncik
 ncik
(@nickb)
Posts: 935
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I've found that 2-up (with jib) sailing requires lots of forestay tension to keep the right shape in the jib. A good way to get forestay tension is with mainsheet tension. If you are blocking out, rake the mast forward so you can pull more tension into the forestay before blocking out the mainsheet. It worked for me...before I broke the boat in half...do with this information what you will...


 
Posted : January 17, 2007 8:12 pm
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