Rocna anchor, 10 kg.

blanton · Post by **blanton** » Mon Jul 31, 2006 11:43 pm

Re: (mods) ROCNA Anchor Mount MacGregor 26M Michael Cantwell July 29, 2006.

Michael, I'm doing something similar with my 10kg Rocna. I'm using one of these http://tinyurl.com/mhmgx because it's a bit beefier and will keep the pointy bits of the anchor a bit further from the GRP.

I may use a Sprint 400 http://tinyurl.com/fkk7f though I have a manual version (Lewmar Anchorman) at hand in the garage.

mtc · Post by **mtc** » Tue Aug 01, 2006 4:41 am

That should work nicely too. The roller I mounted on Bellaroo places the point over the port side about an inch or so and there's no way for it to hit the hull, unless it's off the roller, of course.

One thing to keep in mind, is that the 10kg ROCNA is not only heavy (well, 10 kg) but a bit of that mass is forward of the roller when stowed. I was able to brace the deck with a thick Al pad underneath, but still cognizant of the lever forces on a pounding tack. Not sure how thick the deck is there, about 3/8 to 1/2 maybe, but the longer the lever, of course the greater the force on the mounting bolts.

One thing for certain, if that ROCNA gets away with us under way, the boat will make a very sudden stop. That anchor simply will not drag!

Send some pics of your mount.

Michael

Night Sailor · Post by **Night Sailor** » Tue Aug 01, 2006 10:50 am

Blanton, those are really good specs on the Sprint. Thanks for bringing that to our attention. My second house battery is mounted foreward so a wiring would be easy for me to with that mod.

Let us know how it works for you if you go that way.

blanton · Post by **blanton** » Sun Aug 13, 2006 2:29 pm

Making some progress on the above mentioned Rocna install.
Removed all the forward deck hardware between the chainplate for the forestay and the footings for the bow rail/pulpit.

Basically this consisted of the two little Mac bow cleats and the BWY anchor roller going bye-bye.

Yesterday I fabricated my backing plate for my new fwd deck hardware out of 3/8 inch alum. plate to provide good backing for the
relatively heavy duty SS anchor roller to STBD:
http://tinyurl.com/mhmgx
and a 10" Seadog SS cleat to port, all fwd of the anchor locker which henceforth shall be the rode or "chain" locker with the 10kg Rocna shipped to the bow roller.

The Lewmar bow roller (good for anchors to aprox. 45 lbs) is a two piece pivoting set-up with an aft & under mounting plate and a fwd and above pivoting fwd projecting roller frame.

The aft mounting plate comes with three good-sized bolt holes for mounting. Two holes aft and one hole near the fwd edge of the mounting plate portion of the apparatus. I want to mount the Rocna far enough fwd for gel-coat clearance under powered retrieval that the fwd mounting hole would end up forward of the edge of the deck just to the STBD of the forestay. So .... above deck the 4" wide heavy SS U-channel plate will be mounted upon/sistered to a 4" x 14" aluminum bar.

The above deck components (3/8 + ~ 3/16 = ~9/16 aluminum/SS U channel) plus ~1/4' GRP deck material plus belowdecks 3/8 inch fitted and chamfered (1/8" round-over routed) backing plate (~16" x16" x16" traingle) = total thickness (3/8 + 3/16 + 1/4 + 3/8) 19/16 or roughly one inch and 3/16 structural meat holding things together. I think that might suffice!

(I added three more through deck holes to the SS mounting plate as the fwd hole in the mounting plate though bolted to the above deck 4" x 14 " x 4" 3/8 bar will not extend into the deck. It will simply help tie the SS mounting plate to the 3/8" bar above and slightly fwd of the foredeck.

Later comes the Sprint 400 and it's mounting to the aft bulkhead of the anchor locker with a cut-out of the aft part of the anchor locker hatch to match the Sprint's footprint along with it's mounting plate bent or welded and attached to the forward face of the aft bulkhead of the the anchor locker. I'll gain access to the inside of the bulhead (for approprite bomb-proff backing) through installing a 4" or 6" round opening screw-in port through the liner.

mtc · Post by **mtc** » Mon Aug 14, 2006 6:30 pm

How goes your mod?

Michael

Night Sailor · Post by **Night Sailor** » Mon Aug 14, 2006 6:54 pm

Blanton,
Since you are building this strong to last, I wonder what you are using as a galvanic barrier between the aluminum sister bar and the SS U channe. Plastic sheet or bedding compound?

crackles · Post by **crackles** » Wed Aug 23, 2006 12:05 pm

G'day Blanton,

You're getting a few questions on your progress. Here's mine. Any pictures? I am really interested.

Where I sail, usually have to use the pick, and in a tidal area so I need a good anchor. Of course, then I have to lift it. So, I am really interested.

Good luck.

Crackles.

ChrisP and Pam · Post by **ChrisP and Pam** » Wed Sep 27, 2006 8:46 pm

How about it Blanton. We just ordered the 10kg Rocna. We've been using a 50lb Navy and Pam says that sucker gets heavy!

mtc · Post by **mtc** » Fri Oct 06, 2006 7:05 pm

Progress?

The ROCNA is an excellent anchor and fits very well on the bow of the M.

ChrisP and Pam · Post by **ChrisP and Pam** » Mon Oct 09, 2006 7:50 am

Like I said above, we ordered a Rocna anchor but.... The guy never sent it, billed me or even answered his phone for the last 2 weeks. The vendor is
Best Marine Imports
2801 SW 3rd Ave
Fort Lauderdale, FL 33315
9545238888.
They just seem to have shut down for a while. Even the Rocna distributor in Vancouver said they didn't return his calls either. Does anyone live near there? I'm curious to see if they're still open.

Anyway, I went with the 25lb Manson Supreme from West. It's basically the same anchor and, at least right now, it cost $137 less than the Rocna. They wanted $328.50(US) and they have to distibute from Vancouver Canada and the brokerage fee and shipping add $58.50. I was able to get the Manson from West for $229 plus tax and no shipping.

And when I picked it up, all the guys at West were gawking at this funny looking new anchor and flipping through Sail magazine. LOL By the way, this thing is a lot bigger looking in person than I thought!

So, now I have to mount it...

mtc · Post by **mtc** » Tue Oct 10, 2006 5:25 pm

any pics of the new anchor?

odd to be excited about such a thing.

ChrisP and Pam · Post by **ChrisP and Pam** » Sat Nov 04, 2006 4:06 pm

Sorry I didn't post sooner but we had a death in the family. But the anchor is a West Marine anchor. Just visit their web site. It appears to be down now or I would post a link. I don't know how to post a pic. As far as the look - it's about as close to the Rocna as you can get. It's basically the same anchor. The only real difference is that this one is actually available!

ChrisP and Pam · Post by **ChrisP and Pam** » Sat Nov 04, 2006 4:21 pm

http://manson-marine.co.nz/SitePages/SupManson.htm Here's the website.

craigsmith · Post by **craigsmith** » Tue Nov 21, 2006 9:45 pm

ChrisP and Pam wrote:And when I picked it up, all the guys at West were gawking at this funny looking new anchor and flipping through Sail magazine. LOL By the way, this thing is a lot bigger looking in person than I thought!

The SAIL testing (PDF download, 1.5 MB) can be read here.

The relative position of the Manson Supreme anchor in terms of the average "max before releasing" (holding power) results should be of interest.

In addition to performance, there are aspects of the Supreme relating to construction with which we have serious concerns.

With respect to all copies, no matter the type, we must advise that the originals are almost always better.

As a further example, consider this (PDF download, 900 kB) comparison testing (photo journal) of a genuine CQR vs a Manson plow (CQR copy).

However we understand the price issue is quite valid.

------------------------------------
Moderator's Note: In the interest of full disclosure, Craig Smith is a representative of Rocna, (as implied by his avatar). His comments here are expository, add information, seem non-promotional - but forum members should judge accordingly (Craig's second link is unattributed, but presumably published by Rocna). This post seems valid for the forum ... but Heath is the final arbiter. - fc

Sorry - my identity is fully disclosed in my signature, but the board doesn't seem to display it. - Craig

blanton · Post by **blanton** » Sun Nov 04, 2007 3:35 pm

Apologies, I have not been around for awhile, and hence did not respond in a timely manner to your questions.

I've just posted a couple of pics under "mods".

Re: the well-put question re: SS and aluminum, I'm just going to see how it goes. Having fished an aluminum vessel in Western Alaska for 17 years, with some SS bolted to aluminum, here and there, I've not been much bothered (thus-far) by dissimilar metals issues. I'll keep an eye on it, though!

I'd be comfortable being towed by that bow cleat, something I'd not have said about the original.

MacGregorSailors.com

MacGregorSailors.com

Rocna anchor, 10 kg.

Rocna anchor, 10 kg.

windlass specs

barrier

Rocna install pics now up (and heavy-duty bow cleat)