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Old 01-22-2014
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Mainsheet system

Topic for opinion, The new (to me) boat I purchased in the fall has a 6:1 mainsheet system. It's end boom sheeted with 293 sqft of mainsail. The current blocks are wore out and I've already decided to replace them.
So the question, 8:1 vs 6:1?, does anybody use an 8:1 system for their main sheet? When I run the numbers at 20knot of breeze only a gorilla would be able to sheet the main at 6:1 but I suppose I should be reefed by then. 8:1 would easier to control and adjust under normal conditions but I end up with 100' of line in the cockpit.

Thoughts/opinions, please.

John

BTW, the boat is a Goman Express 35
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Old 01-22-2014
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Re: Mainsheet system

No winch in the system?

Regardless, for the replacement blocks, get Garhauer.
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Old 01-22-2014
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Re: Mainsheet system

Does the gorilla get to use the winch ?
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Old 01-22-2014
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Re: Mainsheet system

We have a Garhauer 6-1 on a 700 sq ft main and no winch. And I am 65 yrs old!

Last edited by Yorksailor; 01-22-2014 at 02:48 PM.
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Re: Mainsheet system

a comparison......

my 150 s/f something, 10+ ft boom uses a 4:1 and needs only 75' of line to reach (near) 90 degrees. You *gotta* need more at 8:1 and a bigger boat!

6:1 is prolly fine; perhaps using well-bearing'd blocks to reduce friction as much as possible? Remember.... an end-boom fixture is at the end of a longish lever with most of the load in the center and fwd,
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Re: Mainsheet system

Quote:
Originally Posted by jfdubu View Post
Topic for opinion, The new (to me) boat I purchased in the fall has a 6:1 mainsheet system. It's end boom sheeted with 293 sqft of mainsail. The current blocks are wore out and I've already decided to replace them.
So the question, 8:1 vs 6:1?, does anybody use an 8:1 system for their main sheet? When I run the numbers at 20knot of breeze only a gorilla would be able to sheet the main at 6:1 but I suppose I should be reefed by then. 8:1 would easier to control and adjust under normal conditions but I end up with 100' of line in the cockpit.

Thoughts/opinions, please.

John

BTW, the boat is a Goman Express 35
A two speed system like this could be a solution
This is Garhaure but you can find this from other makes also

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Re: Mainsheet system

Quote:
Originally Posted by knuterikt View Post
A two speed system like this could be a solution
This is Garhaure but you can find this from other makes also

This is the system I have but by lemar. completely wore out. It.s a 6:1 single or 3:1 double.

John
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Old 01-22-2014
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Re: Mainsheet system

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Originally Posted by Yorksailor View Post
We have a Garhauer 6-1 on a 700 sq ft main and no winch. And I am 65 yrs old!
York, that's pretty amazing. Using the mainsail load calculator on the harken site a 600 sqft sail loads 2044 lbs in a 20 knot breeze. With a 6:1 your trimming 340 lbs?. Drop the wind to 12 knot and it's still 122 lbs.

I guess I need to grind the numbers myself.

John
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Re: Mainsheet system

total sail load,s a ton, but one end...smaller at that , will carry (less than ) half. not an NA, nor an kinda injunear, but it sure would seem the load would be mostly on mast. then the rest is dealt with by the "lever"/boom
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Lightbulb Re: Mainsheet system

You might want to talk to the tech guys at Harken. Over a decade ago they worked with a local yard to develop a gross/fine system for a friend of mine with an Ericson 33 (the Ron Holland design with the fractional rig and monster mainsail).
It's a 5 to 1 / 10 to 1, using stacked fiddle blocks, double-ended sheeting. Pull either one for the 10 to 1, or pull both together for the speedier 5 to 1.
Works wonderfully.

I have crewed on the boat off n on for 15 years.

My own boat has a smaller main and gets by fine with a 6 to 1 system.
As someone once observed-- it's all just Choices and Options. But, the more purchase you have, the easier it is to really enjoy sailing the boat when the pressure goes up.

Cheers,
Loren
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