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  #11  
Old 04-25-2012
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Re: Rigid Boom Vang

I think the raising force of the spring is very small compared to the upward loads on the mainsheet and boomvang when in a beam reach. Then you could argue that the vang is reducing the bending moment on the boom, at least with end boom sheeting, as the boom is now being pulled down at the end and at the middle.

When I apply some vang on a beam reach you can see the load on the main sheet fall.
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  #12  
Old 04-25-2012
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Re: Rigid Boom Vang

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Originally Posted by MarkSF View Post
I think the raising force of the spring is very small compared to the upward loads on the mainsheet and boomvang when in a beam reach. Then you could argue that the vang is reducing the bending moment on the boom, at least with end boom sheeting, as the boom is now being pulled down at the end and at the middle.

When I apply some vang on a beam reach you can see the load on the main sheet fall.
Maybe the only thing to be concerned about it the forces on the goose neck. Seems with a rigid boom vang (one the eliminates your topping lift) there is now a large outward force on the goose neck. A force the goose neck would normally not see. This force would not exceed the spring, gas, or hydraulic force of the rigid boom vang. As long as the goose neck is in good condition, maybe the forces should not be a problem. But then again this goose neck is not really designed for outward forces (think mine is held by rivets), so I guess it is somthing to consider and keep an eye on.

Just seems with a rigid boom vang there are forces there, but they are not apparent, like they would be if you used a topping lift and standard block and tackle vang (you know what the forces are when you pull the lines).
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Old 04-25-2012
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Re: Rigid Boom Vang

I guess the lesson here is if you switch to a rigid vang, don't let those 3 drunken deck apes get into chin-up competitions on the end of the boom in the cockpit.. - at least not all at once...
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Re: Rigid Boom Vang

Yes I try to remember that the vang line has an 8:1 purchase so I try not to pull on it too hard Strictly no putting it around a winch!
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Re: Rigid Boom Vang

Something you should be aware of, which I learned when I had a rigid vang, is that the vang does indeed hold the boom up when attempting to reef. What it doesn't do is stop it from swinging side to side, which it will do when you release halyard tension in order to reef. It also doesn't steady the boom as well as a topping lift when docked or moored. There are pluses and minuses. I decided not to have one on my present boat.

Last edited by jgeissinger; 04-25-2012 at 08:22 PM.
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Re: Rigid Boom Vang

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Originally Posted by jgeissinger View Post
Something you should be aware of, which I learned when I had a rigid vang, is that the vang does indeed hold the boom up when attempting to reef. What it doesn't do is stop it from swinging side to side, which it will do when you release halyard tension in order to reef. It also doesn't steady the boom as well as a topping lift when docked or moored. There pluses and minuses. I decided not to have one on my present boat.
Yes, I saw a similar comment in another post. Another poster said he nearly fell overboard when grabbing the boom to steady himself while reefing in rough weather. I have also seen recomendations my manufacurers to use the topping lift while at dock to take the force off the rigid vang's compression spring.

Say you are reefing (and have a rigid vang) and push down on the boom, will the boom drop any?
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Old 04-25-2012
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Re: Rigid Boom Vang

[QUOTE=jgeissinger;863292There pluses and minuses. I decided not to have one on my present boat.[/QUOTE]

A big plus for a topping is going aloft. I must prefer to use a substantial one with the main halyard as a safety. That little bit of extra height is worth it.
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Re: Rigid Boom Vang

Ditto. 16 or so years ago I put a rigid vang on because it was the latest, coolest thing. Now I find that a topping lift is simply more useful in more circumstances.
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Re: Rigid Boom Vang

Quote:
Originally Posted by casey1999 View Post
Yes, I saw a similar comment in another post. Another poster said he nearly fell overboard when grabbing the boom to steady himself while reefing in rough weather. I have also seen recomendations my manufacurers to use the topping lift while at dock to take the force off the rigid vang's compression spring.

Say you are reefing (and have a rigid vang) and push down on the boom, will the boom drop any?
Yes it will drop. But surely you are never supposed to be using the boom to steady yourself?
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Re: Rigid Boom Vang

Quote:
Originally Posted by jgeissinger View Post
Ditto. 16 or so years ago I put a rigid vang on because it was the latest, coolest thing. Now I find that a topping lift is simply more useful in more circumstances.
What if you keep the topping lift, but add a rigid vang to help while reefing? Would you still recommend just the topping lift and not adding a rigid vang?
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