Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old Yesterday, 14:25   #136
alc
Registered User

Join Date: Apr 2016
Location: ABC's
Boat: Lagoon 400
Posts: 7
Re: Rocna Anchor Failure

Hi All,

I have attached a photo of how the anchor was attached from our survey. We had not modified anything other than replacing the chain in October. We are 100% certain that it was not stolen, other than by the water. We tied up the bridle to the gangway cleat so we know it was stowed when we left.

We are very confident that the anchor eyelet fractured or broke completely during the trip from Aruba to Curacao.

We did not mean to bad mouth Rocna just wanted to know how common a problem it is. I was surprised to find out about the West Marine Rocna recall that took place just a short time before the anchor was purchased in 2016.
Quote:
Originally Posted by avb3 View Post
I would strongly suggest that there were legal discussions with Rocna, and Rocna is going to have to take these back.

Does Rocna's handling of this remind you of the way Ford handled the Pinto, whereas WM is more akin to the way Johnson and Johnson handled the Tylenol poisoning problem?

Thanks to all for all the input on the anchor and anchor setup.

John
Attached Thumbnails
Click image for larger version

Name:	Always Sunday Lagoon 400 Condition Survey May 2018 v2.jpg
Views:	63
Size:	64.6 KB
ID:	204362  
__________________

alc is offline   Reply With Quote
Old Yesterday, 14:34   #137
Moderator
 
Jim Cate's Avatar

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 15,262
Re: Rocna Anchor Failure

I don't see that this photo shows the critical elements... those that connect the chain to the anchor. And for that matter, if you changed chains, then the connection would not be identical to that in the photo.

And agint, as I recall, the issue with the Chinese Rocnas that were recalled was use of a lower grade steel, one that was less stiff than the specified steel... and such steel would be more malleable and less likely to fracture catastrophically.

I'm not convinced that the anchor broke. But you are and I doubt that any further discussion will change your mind, so what would you like to achieve in this thread?

Jim
__________________

__________________
Jim and Ann s/v Insatiable II lying in the Pittwater area for a while
Jim Cate is online now   Reply With Quote
Old Yesterday, 15:27   #138
Registered User

Join Date: Jan 2011
Posts: 222
Re: Rocna Anchor Failure

Quote:
Originally Posted by Jim Cate View Post
I don't see that this photo shows the critical elements... those that connect the chain to the anchor. And for that matter, if you changed chains, then the connection would not be identical to that in the photo.

And agint, as I recall, the issue with the Chinese Rocnas that were recalled was use of a lower grade steel, one that was less stiff than the specified steel... and such steel would be more malleable and less likely to fracture catastrophically.

I'm not convinced that the anchor broke. But you are and I doubt that any further discussion will change your mind, so what would you like to achieve in this thread?

Jim


I do agree that it is very hard to believe that the anchor broke.. I have a Chinese 33 kg Rocna. If I remember right it was installed 2008. I did regalvanized the anchor after app. 10 years of anchoring. I estimate that we have spent at least 2200 nights anchored since new. Chain is a Duplex stainless chain that was installed already 2003. It still look like new. The first years I used a galvanized shackle. Changed that to stainless steel shackle as the galvanized shackle was corroding badly. Strange enough, I do have very little if any corrosion between anchor and stainless steel shackle.

When the chain was new 2002 I had to do send in a piece for a destructive pull test. Last year I took off another 3 feet and sent to the same company for a follow up test. The pull test showed identical results.
Oceansailor is offline   Reply With Quote
Old Yesterday, 15:45   #139
Senior Cruiser
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPB
Posts: 9,235
Re: Rocna Anchor Failure

Is it just me, or does that anchor look over-stressed. Distorted slot (sharp angle at front lower corner, stretched at rear and thinned out above at rear.


I'd suggested it's been badly overloaded at some time and the slot severely weakened.
Attached Thumbnails
Click image for larger version

Name:	anchorslot.jpg
Views:	46
Size:	81.6 KB
ID:	204365  
StuM is offline   Reply With Quote
Old Yesterday, 17:52   #140
alc
Registered User

Join Date: Apr 2016
Location: ABC's
Boat: Lagoon 400
Posts: 7
Re: Rocna Anchor Failure

Hi All,

I understand that many posters don't believe that the anchor could fail as described and that is fine. I am open to any other suggestions other than it was stolen, which it was not. That it was lost before sailing, which it was not. It was stored as shown in the images while sailing and 2 hours later it was gone leaving behind the shackle and chain.

The only thing I am trying to accomplish is to find out how frequently this has happened and based on the images what I may have been doing wrong so that I don't repeat the same mistake and lose another anchor while sailing on a day trip. Or if there might have been something wrong with the Rocna anchors.

I have provided all the information I have and no I was not trying to get Rocna to do anything as others have suggested. I am a realist and know that few companies would step up in a situation like this. With that said I would like to recognize Echo-Tec for standing behind there warranty even after it expired. I tried to order a replacement part and they said that they would honor the warranty even though it had expired 2 months earlier and all I needed to pay for was shipping. Not often a company would step up and offer to replace something these days.
alc is offline   Reply With Quote
Old Yesterday, 18:05   #141
Registered User
 
Exile's Avatar

Join Date: Sep 2010
Location: Land of Disenchantment
Boat: Bristol 47.7
Posts: 4,583
Re: Rocna Anchor Failure

I keep going back to the pic of the shackle pin that looked like it had backed out, but maybe the OP has already ruled that one out.
Exile is online now   Reply With Quote
Old Yesterday, 18:09   #142
Registered User
 
malbert73's Avatar

Join Date: Jun 2008
Boat: Tartan 40
Posts: 1,381
Rocna Anchor Failure

I think it’s always possible for any piece of metal to fail if it’s been stressed prior. If you didn’t own the rocna since new then maybe the slot was elongated and overstressed.

That said, your original pics show a different shackle (stainless) left behind on the chain than on your rocna and chain setup (galvanized shackle) you just posted a pic of.


How come?

Original pic (stainless shackle)
Click image for larger version

Name:	IMG_6936.jpg
Views:	27
Size:	322.0 KB
ID:	204383

Recent pic(galvanized shackle)
Click image for larger version

Name:	IMG_6937.jpg
Views:	30
Size:	143.6 KB
ID:	204384
malbert73 is offline   Reply With Quote
Old Today, 19:17   #143
Registered User

Join Date: Nov 2009
Location: lakeville ma.
Boat: corbin39
Posts: 118
Re: Rocna Anchor Failure

And it looks like the pin is through the chain not the anchor
B-Baysailer is offline   Reply With Quote
Old Today, 19:20   #144
Registered User
 
NYSail's Avatar

Join Date: Jan 2012
Location: Long Island, New York
Boat: Beneteau 423 43 feet
Posts: 518
Re: Rocna Anchor Failure

Based on that photo and others posted I would expect a chunk of metal to be left behind if the anchor broke
__________________

NYSail is online now   Reply With Quote
Reply

Tags
anchor, rocna

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aground: Failure of skill, failure of judgment, bad luck Jammer Seamanship & Boat Handling 76 29-09-2018 09:46
Which is the best Crosby Anchor shackle for a # 40 Rocna Anchor Lambretta Anchoring & Mooring 26 20-06-2018 08:57
Fridge Failure - Danfoss BD35F motor start failure Anjin Plumbing Systems and Fixtures 67 22-03-2018 06:21
Rocna's new anchor/ Hey, Anchor thread!!! goat Anchoring & Mooring 167 15-10-2015 21:57

Advertise Here


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:18.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×

ShowCase vBulletin Plugins by Drive Thru Online, Inc.