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Dismasted! Broken mast tang.
http://www.hobie.com/forums/viewtopic.php?f=17&t=64715
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Author:  Josefk [ Thu May 16, 2019 8:16 am ]
Post subject:  Dismasted! Broken mast tang.

So I was out in the bay and the mast tang gave way. Luckily it was an onshore breeze and I could get everything tidied up and drift gently back home without much drama and damage except to the broken tang. Ironically I gave all the standing rigging a good inspection before setting out - at least at ground level, I shall be dropping the mast more regularly from now to keep an eye on the tang that's for sure. For now I am looking for some advice on how best to proceed before I start the repair.

I have a spare tang in good condition which had been used as a boom vang on a previous 14 and have stainless rivets at hand. There is corrosion as you can see in the images, I've yet to remove the old tang so unsure how bad it is. Providing the corrosion is manageable I'm planning on cleaning it up with a wire brush then fairing the damaged section you can see with JBweld or similar. Then apply tuf gel and sealant before riveting? I see there are rivet casings available to help stop leaks but would sealant suffice?

Also I read Matt Miller say on another thread that some Hobies have a plate in the mast under the tang which the rivets go through. Does the 14 have a plate there too? My mast is an all aluminium, non comp tip.

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Author:  mmiller [ Thu May 16, 2019 11:49 am ]
Post subject:  Re: Dismasted! Broken mast tang.

Just the CompTip styles that tangs mount to have the plate inside fr backing strength. Your aluminum one would not.

The boom vang one is too small for the main tang.

10690000 MAST TANG H14/WV

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Author:  Josefk [ Thu May 16, 2019 10:44 pm ]
Post subject:  Re: Dismasted! Broken mast tang.

Thanks Matt, that's a great help.

The tang I took off the boom looks identical to the broken mast tang, I guess they used a spare part to make their own boomvang? It needs to be reshaped as they had bent it to form around the smaller boom but it looks solid.

After removing the old broken tang the mast looks in decent shape so going ahead with the installation. I can get some epoxy putty to fair it up but having trouble sourcing tef gel or something similar (I'm in Japan). Anyone have any suggestions?

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Author:  srm [ Sat May 18, 2019 4:59 am ]
Post subject:  Re: Dismasted! Broken mast tang.

Personally, I would skip the epoxy. It’s not going to do anything except help trap salt/moisture against the mast.

One thing you could do is use Alodine conversion coating to help protect the exposed aluminum. It is similar to anodizing, but can be purchased in “touch up” pens for coating small areas. You have to be careful though because some versions contain chromates so it’s somewhat nasty to work with and probably not really worth it.

Personally, I would just slap a nice thick coating of Tefgel on the surface of the new tang and on all of the rivets. Tefgel is food grade, so it’s safe to work with and really does seem to a good job preventing corrosion.

sm

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