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side rail/chain plate corrosion repair http://www.hobie.com/forums/viewtopic.php?f=17&t=49522 |
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Author: | Josefk [ Tue Oct 08, 2013 8:41 am ] |
Post subject: | side rail/chain plate corrosion repair |
After pulling off the old carpet I have just discovered terrible corrosion on one of my side stays where the chain plate is riveted. I know from browsing the forums that it is a common problem on 14s. Ideally I'd just replace it but out here (Japan) spares are non existent. So in the make do spirit that I rebuilt the whole boat with I'm weighing up my options and am looking for opinions from those who may have had similar trouble. The corrosion is such that 2 rivets are basically just floating pulling on nothing with only the underside rivet actually holding the chain plate on. I get shivers when I think of how close I must have been to a dismasting when outside the reef in the open ocean swells. The repair I'm thinking of is as detailed by Jose in this thread http://www.hobiecat.com/forums/viewtopic.php?f=17&t=33573&hilit=side+bar "insert an aluminium pipe about 300 mm long inside the side bar and pop rivet the side plate, bar and pipe. It works well. The pipe's circumference needs to fit snug inside the sidebar curve and be about 5 mm thick. This is what I have in both side bars of my H14. " I have on hand some suitable aluminium pipe and can get the stainless rivets easy enough locally. Once that's done I may consider going the next step and doing as Dan Berger did here http://www.hobiecat.com/forums/viewtopic.php?t=4056 Any thoughts or suggestions gladly welcomed. |
Author: | srm [ Tue Oct 08, 2013 9:13 am ] |
Post subject: | Re: side rail/chain plate corrosion repair |
Depending on how severe the corrosion is, you can just drill out the rivets and move the shroud tang forward or aft an inch into fresh metal and re-rivet (the class rules even allow for this). The other option would be to pull the side bar off and flip it around end for end and then re-rivet the anchor plate in position, again in fresh metal. You may have to cut a new opening in the tramp slot if you do this in order to get the tramp on. sm |
Author: | srm [ Wed Oct 09, 2013 9:42 am ] |
Post subject: | Re: side rail/chain plate corrosion repair |
Wow, that is really bad. I would guess that your rail rug does a nice job of holding moisture and keeping the area constantly wet with salt water. When you reinstall, maybe cut the carpet so it's clear of the shroud anchor by an inch all around. I can't really think of a good way to get a pipe inside the rail and secured. Maybe you could use a piece of hard wood (pressure treated) cut to fit snug inside the rail and then hold it in place by using a couple wood screws drilled through the rail and into the wood. Another thought would be to buy some aluminum sheet stock, about 1/16" thick, cut out maybe a 4" x 6" piece and bend it so it wraps around the side bar, then rivet it to the side bar (use aluminum rivets), and then cover the whole thing over with carpet. You would have a bit of a lump there, but it would probably not be a big deal. Either way, I think I will definitely want to flip the side bar end for end so your're mounting the shroud in fresh metal, and isolate the shroud anchor from the side bar using tape or some other non-conductive barrier material. sm |
Author: | rattle 'n hum [ Mon Oct 14, 2013 11:20 am ] |
Post subject: | Re: side rail/chain plate corrosion repair |
Pretty sure you can install the tramp starting in the back just like you did from the front before. A lot of people flip the side bars on Hobie 16s when the frame is apart to move the slot to the back so that those "looser" corners of the tramp are in the back. At our club, it's probably 50/50 front vs. back. |
Author: | srm [ Mon Oct 14, 2013 12:55 pm ] |
Post subject: | Re: side rail/chain plate corrosion repair |
Looks like a good fix. I think that'll really beef up the side bars. sm |
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