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Difference in mast rake between 1 and 2 up #96404
01/17/07 11:17 AM
01/17/07 11:17 AM
Joined: Feb 2004
Posts: 3,528
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scooby_simon Offline OP
Hull Flying, Snow Sliding....
scooby_simon  Offline OP
Hull Flying, Snow Sliding....
Carpal Tunnel

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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)


F16 - GBR 553 - SOLD

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Re: Difference in mast rake between 1 and 2 up [Re: scooby_simon] #96405
01/17/07 12:48 PM
01/17/07 12:48 PM
Joined: Jul 2005
Posts: 465
Oxford, UK
pdwarren Offline
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pdwarren  Offline
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Joined: Jul 2005
Posts: 465
Oxford, UK
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

Re: Difference in mast rake between 1 and 2 up [Re: pdwarren] #96406
01/17/07 01:56 PM
01/17/07 01:56 PM
Joined: Feb 2004
Posts: 3,528
Looking for a Job, I got credi...
scooby_simon Offline OP
Hull Flying, Snow Sliding....
scooby_simon  Offline OP
Hull Flying, Snow Sliding....
Carpal Tunnel

Joined: Feb 2004
Posts: 3,528
Looking for a Job, I got credi...
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


<img src="http://www.catsailor.com/forums/images/graemlins/blush.gif" alt="" />

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

Guess we'll see on Sunday !


F16 - GBR 553 - SOLD

I also talk sport here
Re: Difference in mast rake between 1 and 2 up [Re: scooby_simon] #96407
01/17/07 07:04 PM
01/17/07 07:04 PM
Joined: Mar 2003
Posts: 131
Scotland
George_Malloch Offline
member
George_Malloch  Offline
member

Joined: Mar 2003
Posts: 131
Scotland
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!


Stealth www.peyc.org.uk
Re: Difference in mast rake between 1 and 2 up [Re: George_Malloch] #96408
01/17/07 08:12 PM
01/17/07 08:12 PM
Joined: Oct 2005
Posts: 951
Brisbane, Queensland, Australi...
ncik Offline
old hand
ncik  Offline
old hand

Joined: Oct 2005
Posts: 951
Brisbane, Queensland, Australi...
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...


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