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Author Topic: Adding Rocna but keeping stock rollers for mooring lines  (Read 249 times)

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Set2sea

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Adding Rocna but keeping stock rollers for mooring lines
« on: January 29, 2019, 12:23:01 PM »

I want to add a Rocna 15 to my 1988 Mark 1.
Where I moor, there is a requirement for two mooring pennants so I added two bow cleats as many have done. I currently run the pennants from these two cleats over the stock bow anchor rollers. This works out great for lack of chafe on the pennants as well as not buggering up fiberglass forward of cleats.
I canít imagine how the heck I can keep the stock rollers so I can continue to run my mooring pennants over them and add a Rocna and keep it in place on the bow? Has anybody done this? Maybe with a new anchor bar of some sort?
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Paul Barrett

Stu Jackson

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #1 on: January 29, 2019, 04:46:53 PM »

Paul,

I've had dock lines on our now-32 year old boat running over the fiberglass gunwale without any harm to the glass edge.  I would discount your concern "...for lack of chafe on the pennants as well as not buggering up fiberglass forward of cleats."

Chafe would still occur on the rollers.  Chafe is what applies TO the line but also within the fabric of the line itself.  If you are concerned about the edge both against the line as well as for the glass itself, consider adding rub strakes.  I've used these in many places on our boat.  An example is the aft end of the cabintop where out traveler control lines come aft from the cam cleats we added.  For real chafe protection, material should be applied outside/around the line.  Old hose material from your local fire station has been noted as excellent although there are more options.

Remember, too, a very sobering video that Maine Sail did some years ago about anchors on moored boats.  Bad weather hits, bow goes up and down and those boats with anchors that havern't been STOWED end up cutting through the mooring lines.  Really scary to watch, it was a nice Island Packet, too.  I don't have a link, but it should be somewhere on MS's 'site.
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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Set2sea

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #2 on: January 30, 2019, 09:01:40 AM »

Thanks Stu.
My mooring area (Salem, Ma harbor) is very unprotected so we get some serious wave action.
Chafe gear on pennants is a must (I do have it).
I have friends who have a C34 in my mooring field, they put two pennants on the center cleat and run them through chocks and they get glass erosion forward of the chock on the corner edges.
A quick Google didn't yield anything for corner rub strakes that would fit the bill.
I was just wondering if anybody has made a custom pulpit that would keep the factory rollers there and have a roller for the Rocna out further. I did see some pictures when I thought of searching on "C34 bow pulpit".
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Paul Barrett

Noah

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #3 on: January 30, 2019, 09:22:59 AM »

More info on chafe. Also they express some concerns about thermal heating from chafing weakening synthetic lines.
https://www.practical-sailor.com/issues/37_22/features/chafe-gear-mooring-dock-lines_10899-1.html
« Last Edit: January 30, 2019, 02:02:36 PM by Noah »
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Stu Jackson

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #4 on: January 30, 2019, 01:33:48 PM »

Quote
A quick Google didn't yield anything for corner rub strakes that would fit the bill.
I was just wondering if anybody has made a custom pulpit that would keep the factory rollers there and have a roller for the Rocna out further. I did see some pictures when I thought of searching on "C34 bow pulpit".

Paul,

I haven't seen anything like keeping the two "toy rollers" (as we old guys call them) AND add a "stretch" roller like a URM-1 [see West Marine catalog for bow rollers].  What folks used to do is cut off only ONE of the toys and add the stretch.  Which, of course, is not what you're envisioning.

For searching, there is a very good set of pictures under "Rocna anchors."  There may also be a link in the 101 topics to it, but a simple search should get you there.

Steve Dolling [aka waterdog] and I both decided to deliberately leave the toy rollers on our boats, since anything longer adds a large moment arm and requires fastidious attention to bedding and securing a longer bow roller assembly.  Many have done so.  I also got new rollers for my old toys from Catalina Direct.

And, again, having an anchor "out there" could well exacerbate the issue I mentioned that Maine Sail brought up about anchors cutting mooring pendants in heavy weather.  Have you found that video yet?
« Last Edit: January 30, 2019, 01:35:13 PM by Stu Jackson »
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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Stu Jackson

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #5 on: January 30, 2019, 01:51:57 PM »

Here it is, from the 101 topics:

Anchor Selection 101  includes good discussions of various system selections and pictures of new generation anchors on bowsprits both short and extended http://c34.org/bbs/index.php/topic,4457.0.html
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

"There is no problem so great that it can't be solved."

Set2sea

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #6 on: February 01, 2019, 09:08:16 AM »

Thanks Stu
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Paul Barrett

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #7 on: February 01, 2019, 10:04:36 AM »

Paul,

This link has lots of information including that video I mentioned earlier:

https://marinehowto.com/mooring-pendants-thoughts-musings/
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

"There is no problem so great that it can't be solved."

Dale Stone

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Re: Adding Rocna but keeping stock rollers for mooring lines
« Reply #8 on: February 04, 2019, 01:21:40 PM »

Hi Paul
I'm adding a Rocna this year too. I'm going with the Vulcan 15. I think my roller on the MKII is long enough to handle it. See you in the boat yard soon.
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Dale Stone 2001 C34 II, Hull #1526, Salem Ma
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