CD27 and Chainplates of Doom (rust!)

[Steve Goldfarb]

Anyone have experience with rusty chainplate backing plates? I think our toerail might be leaking, or maybe the chainplates themselves, and therefore the backing plates are turning into cornflakes. It's difficult to tell from the owner's manual, but it looks like there's one big backing plate across all three chainplates, with (maybe) "fingers" that extend down and are glassed into the hull. Looks like they might need to be replaced -- anyone have a sense of how awful this is going to be?
Thanks,
--Steve Goldfarb
s/v "First Draft"



sg@stevegoldfarb.com

[Dana Arenius]

Anyone have experience with rusty chainplate backing plates? I think our toerail might be leaking, or maybe the chainplates themselves, and therefore the backing plates are turning into cornflakes. It's difficult to tell from the owner's manual, but it looks like there's one big backing plate across all three chainplates, with (maybe) "fingers" that extend down and are glassed into the hull. Looks like they might need to be replaced -- anyone have a sense of how awful this is going to be?
Thanks,
--Steve Goldfarb


s/v "First Draft"

Hi Steve,


Try to find out where the leak is really coming from. I would suggest some modeling clay placed around (in a dam formation) around each of the tangs on deck where they come out. Fill the dams with a cup of water and then take a look below. You can also temporarily seal the deck to toe rail seam with a clay dam during this test.

I have not seen shroud tangs extended down to the hull in CDs (I could be wrong). I have only seen singular backing plates for each shroud. The deck layup in that area tends to be quite heavy and close enough to the typical CD deck/hull/toe rail flange that the load is spread more evenly along the flange to the hull.

If the leak is in the shrouds penetrations (I think this is the best bet, then rebeding of the shrouds is called for. The replacement of the backing plates (if heavily rusted) may also be required. If light discolorization, then a simple cleanup may only be required.



arenius@jlab.org