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Old 30-11-2014, 17:34   #1
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Going to larger boom, any downside?

I switched from end of boom sheeting to mid boom on my Bristol 35.5, keeping the old boom which has a 5" round profile. The boom has developed a distinct curve at the sheeting bails, likely due to exuberant sheeting by my race crew. I have the opportunity to buy a bigger boom off a Catalina 40, about a 4-1/2" x 7" squarish oval section. The gooseneck bolt fits. I will have to shorten it; the ends are cast, riveted in place and minimally corroded. The foot is designed for a bolt rope, but it looks like my slides should fit. I am uncertain about the dimensions/position of the tack shackle, but that should be able to be worked around. It seems that the reeling system is much better. There is a vang attachment fitting and two mainsheet attachment points; they slide in a groove and should be readily adjustable. I do not have a dodger or other obstructions that it needs to clear.

Any downside to going with a bigger boom? The weight and windage increase seems minimal relative to the improvement in stiffness.
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Old 30-11-2014, 17:47   #2
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Re: Going to larger boom, any downside?

We did something like that. Couldn't find just the right size so went pretty big. There is some extra weight and it looks out of proportion and it would totally squash your noggin. Works good .
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Old 01-12-2014, 06:19   #3
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Re: Going to larger boom, any downside?

Noggin notwithstanding it should pose no problem.
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Old 01-12-2014, 07:15   #4
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Re: Going to larger boom, any downside?

Quote:
Originally Posted by Jim Walsh View Post
Noggin notwithstanding it should pose no problem.
A lot of older boats have boom issues because they were designed for a bolt rope foot but then sailmakers talk you into a loose footed main without taking in to account that the boom is too light. On anything less than a serious racer the extra weight is not going to be a problem other than maybe having to use the topping lift more in the very light. Ive actually installed a larger boom when I got the opportunity to buy a very cheap much newer, nicer boom.

Steve.
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Old 01-12-2014, 07:47   #5
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Re: Going to larger boom, any downside?

Interesting notion. If the foot carries part of the load as you suggest, then how is it possible to have a loose-footed main in the first place?

Can't recall exactly what thread, but I am pretty sure your notion has been debunked elsewhere. I mean think about it. The fact that the clew is lifting causing the boom to bend at the mid-boom bail, isn't that telling you the clew is where all the load is at? Like a canitlever?

But hey, what do I know? I converted from mid-boom to end-of-boom sheeting.
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