Repair a bent boom?

dunedin

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Good thinking. It gets around the need to have a specialist boom extrusion, with track top and bottom. I tend to forget this, as my main is loose footed.
You don’t need a specialist boom or tracks top and bottom for a stack pack cover. It still got a bolt rope on the foot of the sail the standard technique is a narrow strip of thinner material which fits into the top track with the bolt rope.
Personally I would absolutely NOT fit caravan awning tracks on the side of the boom as
(a) potentially extra danger of head injuries when boom and heads interact (in spite of all best efforts, when not if)
(b) extra work and extra holes in the boom
(c) entirely unnecessary, as thin cloth round bolt rope approach works perfectly
 

Chiara’s slave

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Point A, if you’re clobbered by a cruiser boom with any weight in the wind, the prescence or absence of fittings won’t make much difference. Extra holes, fair enough if it bothers you. And all the tracks I’ve come across have been a quite tight enough fit already. Fair enough if you have the sail made or altered, but no material thin enough would be strong enough otherwise.
 

PetiteFleur

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I got a secondhand boom from Z Spars in Hadleigh, Suffolk for my previous boat - all I had to do was shorten it. For my current boat I bought a complete boom plus all for reefing from ebay, had to drive to London to get it and also fit a new gooseneck, also from ebay.
 

Stemar

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A stakpac designed to fit in the sail slot has a tape that's supposed to fit in the slot. round the sail's boltrope. and I'd say that's the ideal, but if you can't do that, put a boltrope in the bottom of the stakpak and convert the sail to a loose foot. The strength of the foot may be an issue on larger boats, but on a wee one, it's very unlikely to be a problem. All you have to do is work out a way to hold the clew down to the boom, which could be a mast slide or simply a webbing band round the boom.
 

rogerthebodger

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You can get dent removal machined that are used by panel beaters to remove the dents in the boom.

The crack need welding than can be done with TIG or even MIG welding''

The bend can be removed using a horizontal press with roller vee blocks to aid rotating the boom.

I have done this straightening propshafts and other types of shafts

The issue may be any kinks in the bend would bot be possible to replace properly
 

dunedin

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Point A, if you’re clobbered by a cruiser boom with any weight in the wind, the prescence or absence of fittings won’t make much difference. Extra holes, fair enough if it bothers you. And all the tracks I’ve come across have been a quite tight enough fit already. Fair enough if you have the sail made or altered, but no material thin enough would be strong enough otherwise.
in 99% of the cases you don’t need a sail with foot boltrope altered - the strong but thin and shiny material used for the stackpack on these situations is easily fitted in. Tens, probably hundreds, of thousands of stackpacks installed using this method.
 

Chiara’s slave

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in 99% of the cases you don’t need a sail with foot boltrope altered - the strong but thin and shiny material used for the stackpack on these situations is easily fitted in. Tens, probably hundreds, of thousands of stackpacks installed using this method.
I guess it doesn't matter much if it never has to move. Do most people never change their clew tension?
 

Chiara’s slave

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You can still adjust the clew with a stackpack fitted like that. not sure why you think you can'. As said, pretty standard setup
Not if it’s a tight fit you can’t. The after market ones I’ve seen fitted like that do not move well enough in my view. I would, personally, find an alternative method.
 

dancrane

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What length is the dented boom?

I doubt my Osprey's would be long enough, even assuming the gooseneck fittings are suitable/adaptable/replaceable, but you'd be welcome.

Having said that, I'm nearly 600 miles south of you.
 

Chiara’s slave

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The gooseneck is the hardest obstacle to overcome, probably. He can probably get an alloy section for nearly nothing, but may have to get the gooseneck fabricated. It’s quite common to see dyneema webbing short loops used for other strong attachments, you can buy those in climbing shops. A bit of improvisation will help keep his costs down.
 

Daydream believer

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You don’t need a specialist boom or tracks top and bottom for a stack pack cover. It still got a bolt rope on the foot of the sail the standard technique is a narrow strip of thinner material which fits into the top track with the bolt rope.
Personally I would absolutely NOT fit caravan awning tracks on the side of the boom as
(a) potentially extra danger of head injuries when boom and heads interact (in spite of all best efforts, when not if)
(b) extra work and extra holes in the boom
(c) entirely unnecessary, as thin cloth round bolt rope approach works perfectly
Lots of Hanse boats use the system. My boat has had it for the past 20 years & it has made things easy when rigging, at the start/end of the season, or when maintenance needed. It also allows easy adjustment when a sail is not loose fitted. I think that your comments are unfounded.
 

Daydream believer

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The stac pack is not decided yet. We might opt for independent lazy jacks and a simple sail cover instead.
A sailcover is going to need slots for the lazy jacks & will involve hassle at the start & end of the day.
If your sail is a fixed foot one it will not set properly if used as a loose foot one.
If you go for a mast extrusion you will have to find end fittings & that will be as difficult as finding the correct extrusion in the first place,
If the bend is near the end you might look at how the stresses work. It may be that the mainsheet comes under the clew & right near a potential repair. That could mean that there will not be any bending moment when going up wind .When running the upward pull of the clew will not bend the boom at the repair. . Is the boom long enough to cut the damage out & have it re spliced using bits cut out of another butchered boom
There must be various options available
 

ProDave

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