"The chainplate will buff out and probably be okay" - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest Forums > General Discussion (sailing related)
 Not a Member? 


Like Tree6Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 11-24-2012
JulieMor's Avatar
Senior Member
 
Join Date: Sep 2011
Posts: 853
Thanks: 47
Thanked 16 Times in 16 Posts
Rep Power: 3
JulieMor is on a distinguished road
"The chainplate will buff out and probably be okay"

I found this while looking for videos on chainplate replacement. The guy was surprised by what he found!
jameswilson29 likes this.
Reply With Quote Share with Facebook
  #2  
Old 11-24-2012
MedSailor's Avatar
"Fairhaven" Formosa 41
 
Join Date: Mar 2008
Location: Anacortes PNW
Posts: 1,870
Thanks: 17
Thanked 23 Times in 17 Posts
Rep Power: 7
MedSailor is on a distinguished road
Re: "The chainplate will buff out and probably be okay"

"I know from experience that it will buff out and will probably be okay."

Niiiiiice..... Why inspect something if you don't know what bad looks like when you find it? Besides, who needs to "buff out" something (a cosmetic fix) that is behind wooden panels anyway?

My chain-plates are all kinds of bad. It's the next big project for my boat. I'm contemplating making a home foundry and casting my own out of bronze....

MedSailor
__________________
"True, your boat will outperform mine to windward, but my boat will always outperform yours at anchor." --MedSailor
Reply With Quote Share with Facebook
  #3  
Old 11-24-2012
JulieMor's Avatar
Senior Member
 
Join Date: Sep 2011
Posts: 853
Thanks: 47
Thanked 16 Times in 16 Posts
Rep Power: 3
JulieMor is on a distinguished road
Re: "The chainplate will buff out and probably be okay"

As a potential buyer, that was a great lesson.
AncientTech likes this.
Reply With Quote Share with Facebook
  #4  
Old 11-24-2012
RichH's Avatar
Senior Member
 
Join Date: Jul 2000
Location: Pennsylvania
Posts: 2,574
Thanks: 9
Thanked 38 Times in 34 Posts
Rep Power: 14
RichH will become famous soon enough
Re: "The chainplate will buff out and probably be okay"

The chainplate knees on Tayana 37s are notorious 'mushroom farms' that hold but never release the moisture ... the constant moisture is what has caused the crevice corrosion on the (probable) 302 Stainless OEM chainplates. There's wood behind all those fiberglass knees, and was used to affect a 'form' over which the knee's fiberglass was layed.

On a Ty37 when you remove the plates if you see 'any' rust blooms emanating from the studs .... and/or seeing such 'rust blooms' on the chainplates themselves - the only remedy is complete and total rebuild of the knees, and serious consideration of new plates. This high suspicion of internal rot should also be held if there are any chainplate studs that have 'rusted off' at the outer surface of the fiberglass knee.

BTW such rotted knees on a Ty37 is not just a 'lack of maintenance' item of routine recaulking the plates' thoughdeck; but, is pretty indicative or high suspicion of a Ty37s teak deck needing removal and the under-deck needing a total re-core -- a backbreaking or 'very costly' job, your choice.

Last edited by RichH; 11-24-2012 at 06:21 PM.
Reply With Quote Share with Facebook
  #5  
Old 11-24-2012
floridajaxsailor's Avatar
Senior Member
 
Join Date: Aug 2010
Location: Ft Myers, FL
Posts: 190
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
floridajaxsailor is on a distinguished road
.

Julie,
chainplate backing w aluminum small plating is on my agenda for next week actually
yet may I digress and say you are captivating when you talk technical speak...
Reply With Quote Share with Facebook
  #6  
Old 11-25-2012
souljour2000's Avatar
Senior Member
 
Join Date: Jul 2008
Posts: 600
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 6
souljour2000 is on a distinguished road
Re: "The chainplate will buff out and probably be okay"

Jesus..! If it wasn't so scary this would be Monty-Python hilarious...the guys slow monotone voice as the almost farcical condition of the chainplate is revealed almost had me ROFL...
Reply With Quote Share with Facebook
  #7  
Old 11-25-2012
Junior Member
 
Join Date: Apr 2007
Location: North Carolina
Posts: 24
Thanks: 3
Thanked 1 Time in 1 Post
Rep Power: 0
mjf55 is on a distinguished road
Monotone voice aside, it was very interesting. The question I have is that repair he made, circular plywood plugs in the knee, steel back plates sufficient? Should the plugs have been joined together? Fiberglass laid over the whole knee repair? Aluminum vs steel backing plates? Or am I just overbuilding again ? Thoughts?

Sent from my DROID X2 using Tapatalk 2
__________________
Mark
1975 Hunter30
Reply With Quote Share with Facebook
  #8  
Old 11-25-2012
SloopJonB's Avatar
Senior Moment Member
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 10,316
Thanks: 55
Thanked 34 Times in 32 Posts
Rep Power: 3
SloopJonB will become famous soon enough
Re: "The chainplate will buff out and probably be okay"

I posted a while back about my chainplate experience - I took the headstay fitting off to polish - it looked fine but wasn't OCD shiny, as I require.

After buffing it with a 1/2 horse buffing machine I noticed what looked like a faint hairline scratch across the front surface of the tang portion below the welded portion. You had to catch the light across it just right to even see it. I buffed it some more but it was still there. I held it at both ends and pulled and it slowly bent like taffy until it snapped across that "scratch".

I immediately pulled every chain in the boat and made up new ones which I had electropolished.

Crevice corrosion can be VERY subtle.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I, myself, personally intend to continue being outspoken, opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
Reply With Quote Share with Facebook
  #9  
Old 11-25-2012
Senior Member
 
Join Date: Feb 2012
Location: New Orleans Louisiana
Posts: 1,469
Thanks: 5
Thanked 22 Times in 21 Posts
Rep Power: 3
Stumble is on a distinguished road
Re: "The chainplate will buff out and probably be okay"

Quote:
Originally Posted by mjf55 View Post
Monotone voice aside, it was very interesting. The question I have is that repair he made, circular plywood plugs in the knee, steel back plates sufficient? Should the plugs have been joined together? Fiberglass laid over the whole knee repair? Aluminum vs steel backing plates? Or am I just overbuilding again ? Thoughts?

Sent from my DROID X2 using Tapatalk 2
Steel+aluminium+stainless+water is pretty much the definition of an electrolysis problem. Wood anywhere near chainplates is equally a bad idea. They get so heavily loaded even fully encapsulated wood will eventually have the sheathing breached, leading to rot.

Add in that chainplates are often out of sight, or difficult to get to, and there is nothing about this repair that is anything other than a problem waiting to happen.
__________________
Greg Rubin
Attorney
Reply With Quote Share with Facebook
  #10  
Old 11-25-2012
SloopJonB's Avatar
Senior Moment Member
 
Join Date: Jun 2011
Location: West Vancouver B.C.
Posts: 10,316
Thanks: 55
Thanked 34 Times in 32 Posts
Rep Power: 3
SloopJonB will become famous soon enough
Re: "The chainplate will buff out and probably be okay"

Quote:
Originally Posted by mjf55 View Post
Monotone voice aside, it was very interesting. The question I have is that repair he made, circular plywood plugs in the knee, steel back plates sufficient? Should the plugs have been joined together? Fiberglass laid over the whole knee repair? Aluminum vs steel backing plates? Or am I just overbuilding again ? Thoughts?

Sent from my DROID X2 using Tapatalk 2
The mild steel backer was LAME - spend the extra $2 and get stainless strap from a scrapyard. Mild steel will ALWAYS rot on a boat - did you catch how it was in the head and the trim cover wasn't going back on?

Throughbolting them through the hull is plenty strong, especially with all that plywood bedded in epoxy as well.

That original installation is one of the worst designs I have ever seen - I mean really, cobbled up T-Bolts set in as studs? I guess glassed in chains might be a little worse but it would be debatable.

I dearly hope the Maestro didn't spec that horrible setup.

IMHO, the only way to have chainplates set up is to have them fully exposed and bolted through a knee or bulkhead.

P.S. The guy doing the video obviously isn't a SailNetter or he would NEVER have said, in all seriousness "That'll buff out".
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
I, myself, personally intend to continue being outspoken, opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.

Last edited by SloopJonB; 11-25-2012 at 07:18 PM.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
"Seacock" vs. "ballcock" or "ball valve?" SEMIJim Gear & Maintenance 18 09-02-2013 05:31 PM
That's not going to buff out... "collision" mdbee Seamanship & Navigation 6 08-15-2012 07:58 PM
VIDEO: Coast Guard Academy Welcomes "Blue Goose" and "Stormy Petrel" - Patch.com NewsReader News Feeds 0 07-28-2012 07:50 AM
C270 Main Sail "stack Pack", Quick Cover", "lazy Bag" Install randy22556 Catalina 1 02-28-2007 11:53 AM


All times are GMT -4. The time now is 03:47 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012