I'm in the middle of purchasing a 77 CD30 - and am a little concerned about the deck-stepped rigging. Can anyone provide me with any information with respect to the strength/weakness of this rig? The boat looks great - this is the only thing that really concerns me...
Thanks,
Sean Engle
Tacoma, WA
ssengle@worldnet.att.net
CD30 Rig Failures?
Moderator: Jim Walsh
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Michael Stephano
Re: CD30 Rig Failures?
I would be more concerned about the condition of the chain plates and the stem fitting. You will need to look at the frame work and anchor pipes ont he edson steering as well.
good luck
mundo@visi.net
good luck
mundo@visi.net
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Bill Goldsmith
Re: CD30 Rig Failures?
As pointed out here, the chain plates and stem fittings are subject to rusting in this vintage CD. On this board are some stories about the intensive labor involved in replacing rusted mild steel fittings that are partially glassed in.
Despite the common occurrence of rust on these fittings, there have been no known rig failures due to this problem. Probably a result of the fact that the "chain plates" are really not chain plates as we normally think of them. Typical chain plates transfer the entire load of the shrouds through the deck to a bulkhead. Any rust or deterioration whatsoever on a traditional chain plate is therefore unacceptable.
On CDs, however, the "chain plates" are really backing plates for the hardware that attached the shroud padeyes to the deck. The load is a compressive load, so the deterioration of the plates is less likely to cause a rig failure than the deterioration of real chain plates.
Some board contributors have reported so much rusty deterioration of their backing plates that they have replaced them. On my 1980 CD27 I found surface rust that was easily scraped off revealing solid steel. I sprayed some rust inhibitor around the plate and into every available opening in the glass, to stave off the likelihood of having to replace.
Be careful!
Bill Goldsmith
CD27 #173
Second Chance
goldy@bestweb.net
Despite the common occurrence of rust on these fittings, there have been no known rig failures due to this problem. Probably a result of the fact that the "chain plates" are really not chain plates as we normally think of them. Typical chain plates transfer the entire load of the shrouds through the deck to a bulkhead. Any rust or deterioration whatsoever on a traditional chain plate is therefore unacceptable.
On CDs, however, the "chain plates" are really backing plates for the hardware that attached the shroud padeyes to the deck. The load is a compressive load, so the deterioration of the plates is less likely to cause a rig failure than the deterioration of real chain plates.
Some board contributors have reported so much rusty deterioration of their backing plates that they have replaced them. On my 1980 CD27 I found surface rust that was easily scraped off revealing solid steel. I sprayed some rust inhibitor around the plate and into every available opening in the glass, to stave off the likelihood of having to replace.
Be careful!
Bill Goldsmith
CD27 #173
Second Chance
Michael Stephano wrote: I would be more concerned about the condition of the chain plates and the stem fitting. You will need to look at the frame work and anchor pipes ont he edson steering as well.
good luck
goldy@bestweb.net
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Michael Stephano
Re: CD30 Rig Failures?
You are correct in your statement. The rigging is well anchored through the deck and hull flange. In my boat the problem more important than the chainplates deteriorating was the backing plates were also shot. It is to my understanding that when mild steel scales it looks terrible but in fact it is a small amount of steel causes a large amount of scale. I have seen simular vintage boats in fine shape and ones like my own which suffered moisture and to the naked eye look terrible. On my boat I ground away the rebar and replaced the backing plates on 3 layers of unilateral glass. This will take care of the problem permanently. The stem fitting is another project.
mundo@visi.net
mundo@visi.net