Twin Main Sheet Set Up

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Sylvain

Sylvain

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Sep 22, 2009
84
Hunter 33 1980 Kingston
I didn't like the traveler location on my H33C.
Here are some photos of my new set up with twin main sheets.
It works very well and was much cheaper than mounting a cabin top traveler.


Someone will comment on the red tape holding the hatch together. It had a 4 inch cracked when I bought the boat and it finally broke in August. That's now another winter project.
 

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Ed H

Ed H

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Sep 15, 2010
244
Hunter 33_77-83 Regent Point Marina, Virginia
I am not thrilled with the location of our traveler either... With your set up, does each/most adjustments to the main require you to adjust both sheets? Ed H
 
B

Barnacle Bill

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Jun 9, 2008
1,801
- -- -Bayfield
I did this on a boat I owned several years ago that had to traveler, but the basic Crosby rig and it worked super well. You can essentially put the boom where ever you want it between the vang and the two mainsheets as you have set them up. I am sure you will love the system. Good job.
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Novelman had this set up on his Lancer 25 and it worked pretty well. The nice thing is that it also act as a preventer. Is that deck eye going to be strong enough? There is alot of mechanical load as you get closer to the mast. Another concern is breaking the boom. but if you are preventing accidental gybes that risk is reduced. Did I just answer my own concern?
 
Sylvain

Sylvain

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Sep 22, 2009
84
Hunter 33 1980 Kingston
caguy said:
Novelman had this set up on his Lancer 25 and it worked pretty well. The nice thing is that it also act as a preventer. Is that deck eye going to be strong enough? There is alot of mechanical load as you get closer to the mast. Another concern is breaking the boom. but if you are preventing accidental gybes that risk is reduced. Did I just answer my own concern?
Click to expand
They are not deck eyes but u-bolts. The u-bolts are going through the cabin top and have a backing plate. I removed the liner with a 3 inch hole saw and since the liner isn't structural on these Hunters, I filled the gap and pushed as much thickened epoxy between the liner and the core. It's solid.

As for adjusting the boom, it feels like I have a better control on the main shape. It also helps when going down wind.
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Sylvain said:
They are not deck eyes but u-bolts. The u-bolts are going through the cabin top and have a backing plate. I removed the liner with a 3 inch hole saw and since the liner isn't structural on these Hunters, I filled the gap and pushed as much thickened epoxy between the liner and the core. It's solid.

As for adjusting the boom, it feels like I have a better control on the main shape. It also helps when going down wind.
Click to expand
That was my next question, Do you even need a boom vang?
 
Stu Jackson

Stu Jackson

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Feb 26, 2004
23,055
Catalina 34 224 Maple Bay, BC, Canada
Frank, sure you do. it's no different than a regular mainsheet. Loosen the mainsheet and the boom rises. Only way to keep it down is a vang, specially off the wind. Think about it.
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Stu Jackson said:
Frank, sure you do. it's no different than a regular mainsheet. Loosen the mainsheet and the boom rises. Only way to keep it down is a vang, specially off the wind. Think about it.
Click to expand
Except that you are tigjhtenning up the lee side when the boom swings over and pulling straight down with the sheet. The windward side is the one you are loosening.
 
B

Benny17441

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May 24, 2004
7,174
CC 30 South Florida
Not quite sure what the setup accomplishes but seems to me a boom vang would be more effective.
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Benny17441 said:
Not quite sure what the setup accomplishes but seems to me a boom vang would be more effective.
Click to expand
There are several advantages that come to mind.
No need for expensive traveler.
No head banging obstruction across companion way.
No need for boom vang.
Acts as a preventer eliminating accidental gybes.
Better visibility forward without traveler in way.

Disadvantage:
Two sheets to adjust. (but then you don't have to have the traveler to adjust.)

At any rate I would like to try it before passing judgement on it.
 
Stu Jackson

Stu Jackson

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Feb 26, 2004
23,055
Catalina 34 224 Maple Bay, BC, Canada
caguy said:
Except that you are tigjhtenning up the lee side when the boom swings over and pulling straight down with the sheet. The windward side is the one you are loosening.
Click to expand
Frank, when the leeward mainsheet is let out, say on a beam reach or beyond, the leeward mainsheet is NOT in a position to pull the boom DOWN. That's why you still need a vang. again, think about it, some more.:):):)
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
Stu Jackson said:
Frank, when the leeward mainsheet is let out, say on a beam reach or beyond, the leeward mainsheet is NOT in a position to pull the boom DOWN. That's why you still need a vang. again, think about it, some more.:):):)
Click to expand
Stu, ok, ok I gave it some more thought. I think the picture is self explanatory.
 

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Jackdaw

Jackdaw

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Nov 8, 2010
11,386
Beneteau First 36.7 & 260 Minneapolis MN & Bayfield WI
Frank,

If the scale and location of the diagram are correct, then you are right, you might not need a vang. But I think your boom is at risk... that is an amazing amount of leverage/load on the boom, with the mainsheet begin so far from the clew.
 
caguy

caguy

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Sep 22, 2006
4,004
Catalina, Luger C-27, Adventure 30 Marina del Rey
No different than the bale location with a traveler. That's why booms break with travelers on accidental gybes. I've always assumed that is the reason for multiple bales and blocks on the boom, to distribute the load.
 
Jackdaw

Jackdaw

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Nov 8, 2010
11,386
Beneteau First 36.7 & 260 Minneapolis MN & Bayfield WI
caguy said:
No different than the bale location with a traveler. That's why booms break with travelers on accidental gybes. I've always assumed that is the reason for multiple bales and blocks on the boom, to distribute the load.
Click to expand
Measure the lengths on the diagram.

If the diagram is correct, its closer.

If the diagram is not correct, he needs a vang.

You are right about the multi-bales. It helps a point failure, but not if the boom is totally loaded up with a huge span between the clew and the sheet. All else being equal the farther you move the traveler towards the clew, the better the sheeting will be.
 
Sylvain

Sylvain

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Sep 22, 2009
84
Hunter 33 1980 Kingston
Jackdaw said:
Measure the lengths on the diagram.

If the diagram is correct, its closer.

If the diagram is not correct, he needs a vang.

You are right about the multi-bales. It helps a point failure, but not if the boom is totally loaded up with a huge span between the clew and the sheet. All else being equal the farther you move the traveler towards the clew, the better the sheeting will be.
Click to expand

I am going to add a vang once I get around to install it. The added pull on the boom will reduce the stress at the sheets.

I'm also thinking of splitting the load at the sheets by using another bale and triple block at the u-bolts.
 

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