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07-31-2018, 01:32 PM
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#1
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Veteran Member
City: Fort Pierce, FL
Vessel Name: Airagone Strider
Vessel Model: Cal 39
Join Date: Sep 2017
Posts: 39
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Rocna Comparison?
Does anyone have any thoughts on how the holding power of a new style Rocna Vulcan anchor compares to an old style Rocna with a roll bar of the same size?
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07-31-2018, 01:41 PM
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#2
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,308
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They say it’s about the same but I never got a chance to try one.
It would be my choice if the roll bar Rocna doesn’t store well on your boat.
I bought one to replace my Delta but Possum sank before I got a chance to try it.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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07-31-2018, 01:47 PM
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#3
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TF Site Team
City: Westerly, RI
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 4,162
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We have a Vulcan. I used to own a traditional Rocna on a different boat. We've sat in a number of 30+kt blows where we've swung around and opposed the direction the anchor was set with both anchors. We don't see any difference between the performance of the two.
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07-31-2018, 03:48 PM
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#4
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Guru
City: San Francisco
Join Date: Apr 2018
Posts: 3,094
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Since the new Rocna is a straightforward copy of the Spade, it should perform about the same. Holding power about the same, resetting ability better.
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07-31-2018, 05:49 PM
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#5
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Guru
City: Victoria TX
Vessel Name: Bijou
Vessel Model: 2008 Island Packet PY/SP
Join Date: Nov 2012
Posts: 5,290
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Quote:
Originally Posted by HopCar
They say it’s about the same but I never got a chance to try one.
It would be my choice if the roll bar Rocna doesn’t store well on your boat.
I bought one to replace my Delta but Possum sank before I got a chance to try it.
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Poor Possum.
Are you thinking about getting another boat? I’m out of the loop so sorry if this has been discussed.
The Rocha you sold me (and delivered!) with the roll bar has been awesome btw.
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07-31-2018, 06:08 PM
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#6
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Senior Member
City: Seattle, WA
Vessel Model: Willard 47' Dover Trawler
Join Date: Mar 2014
Posts: 125
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This is an interesting piece:
https://www.morganscloud.com/2016/08...hts-on-vulcan/
The Morgan's Cloud guy recommends the Spade, arguing, along with Practical Sailor, that the Rocna can fail to reset after a 180 degree wind change. He also argues that the Vulcan is inferior in construction to a Spade.
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07-31-2018, 06:38 PM
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#7
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,308
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Quote:
Originally Posted by cardude01
Poor Possum.
Are you thinking about getting another boat? I’m out of the loop so sorry if this has been discussed.
The Rocha you sold me (and delivered!) with the roll bar has been awesome btw.
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She sank in the last hurricane. I suppose I should start a thread on the loss. She was well insured and someone bought her from the insurance company and is fixing her up. I’m glad she’ll have a second life.
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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07-31-2018, 07:48 PM
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#8
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Veteran Member
City: Fort Pierce, FL
Vessel Name: Airagone Strider
Vessel Model: Cal 39
Join Date: Sep 2017
Posts: 39
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A tradition Rocna won't fit in our new boat. Thinking of a Vulcan. Totally believe in the traditional Rocna. Glad you're having good results with it. I was sure you would.
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07-31-2018, 08:14 PM
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#9
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by ScottH
A tradition Rocna won't fit in our new boat. Thinking of a Vulcan. Totally believe in the traditional Rocna. Glad you're having good results with it. I was sure you would.
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If you are looking for another anchor without a roll bar, you may want to consider the Sarca Excel. They now have a NA distributor.
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07-31-2018, 08:53 PM
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#10
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TF Site Team
City: Ex-Brisbane, (Australia), now Bribie Island, Qld
Vessel Name: Now boatless - sold 6/2018
Vessel Model: Had a Clipper (CHB) 34
Join Date: Jun 2008
Posts: 10,101
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Quote:
Originally Posted by HopCar
She sank in the last hurricane. I suppose I should start a thread on the loss. She was well insured and someone bought her from the insurance company and is fixing her up. I’m glad she’ll have a second life.
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Sorry to hear about this Hoppy. I was unaware. Good that she was well-insured.
__________________
Pete
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08-01-2018, 05:31 AM
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#11
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Guru
City: Windmill Harbour, Hilton Head Island, SC
Vessel Name: River Girl
Vessel Model: 2004 DeFever 49 RPH
Join Date: Sep 2016
Posts: 573
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I had bought a 20Kg ROCNA for my GB36 but the roll bar kept hitting the FRP pulpit due to the "through pulpit" style bow roller. Sold the ROCNA and replaced it with a 20Kg Vulcan which proved to be identical in holding power for us.
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Jeremy
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08-01-2018, 06:53 AM
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#12
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Guru
City: Galveston, Texas
Vessel Model: 24" El Pescador
Join Date: Nov 2014
Posts: 744
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Used a 40 kg Rocna Vulcan for two 6 month trips from Anacortes to Glacier Bay & back--no problems.
I would buy it again
Look at the shank, it has a taper--make sure it will be compatible with any constriction you might have on your roller-pulpit.
__________________
Ken Diestler
Galveston, Tx
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08-01-2018, 07:16 AM
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#13
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Guru
City: Southern Maine
Vessel Model: Prairie 36 Coastal Cruiser
Join Date: Dec 2012
Posts: 2,717
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Did I hear the guy in the video say, last on his list of well-setting anchors, and almost imperceptibly, "Manson?"
Mine has set, and reset, pretty well so far. There was one time in a wind reversal where it dragged a bit before resetting. Frankly I never trust a reset, so none of this is a surprise to me.
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08-01-2018, 09:27 AM
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#14
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TF Site Team
City: Westerly, RI
Vessel Name: N/A
Vessel Model: 1999 Mainship 350 Trawler
Join Date: Jan 2014
Posts: 4,162
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Note that the test is done at a scope of 3.5:1 and the speed and resulting force of the reversal isn't a great 'real world' example. I've never seen a condition where a boat reverses 180 degrees at 3.5 knots directly over the anchor. A 180 reversal directly over the anchor typically only occurs at slack wind and tide, therefore is not as fast as was tested. If there is high wind clocking around, then the reversal is around the circumference of the scope, not the diameter.
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08-01-2018, 09:28 AM
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#15
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Guru
City: Miami River
Vessel Name: Gotcha
Vessel Model: Grand Banks. Heritage. 54
Join Date: Aug 2016
Posts: 2,988
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Quote:
Originally Posted by SteveD
This is an interesting piece:
https://www.morganscloud.com/2016/08...hts-on-vulcan/
The Morgan's Cloud guy recommends the Spade, arguing, along with Practical Sailor, that the Rocna can fail to reset after a 180 degree wind change. He also argues that the Vulcan is inferior in construction to a Spade.
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I’m no expert on anchors like some on this forum ( ref to the Pacific Northwest) but I bought a Spade anchor about seven months after reading many tests (yes, I didn’t follow Ted’s recommendation based on the hoop on the Rockna) and used it for a month in the Bahamas. In two locations I found it didn’t dig in (not sure what the bottom was) but in all the others it dug in and held for a month of anchorings. My last anchor was a Boss which also did great but the physical size was too big for the new boat.
I will say the new generation of anchor are far superior to the anchors I grew up with for fifty years.
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08-01-2018, 09:44 AM
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#16
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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Anchors are tested for holding power in an anchor test that produces 5000lbs of tension on the rode. Just say’in “I anchored all summer and all was well” dosn’t measure holding power. Setting yes. But you need some really big heavy gear to test holding power. And the ability to equalize as many variables as possible. Oh and the anchor test should be done by a relatively neutral party. Very few anchor tests qualify.
May of the anchors in this thread have not been seriously tested. Maybe I’ve been snooz’in but I don’t recall a top notch anchor test for some time. Anchor manufacturers do tests but it’s mostly beach dragging. Even out of the water. I recall a Mantus rep in a company vid w a small Rocna that was attached to the Rocna as he was walking backwards on a beach pulling the Rocna along carefully holding the line up high enough so the fluke tip was just skidding along perhaps the tip not even touching the sand. Of course it just skidded along like a little kid pulling a sled. But it looked silly and made the Rocna look stupid. Notice how most all (and maybe all) the manufacturers demonstrations make their product look like it’s a miracle compared to the others. And of course there are no miracles.
Anyway it appears to me that quite a few newer anchors have not been seriously tested. Correct me if I’m wrong but I include the Mantus, Vulcan, Excel, and Boss anchors in this basically not tested category. Mostly (probably) because there hasn’t been any comprehensive anchor tests for a few years. And until there is how good these anchors are re holding power will not be known. But enough of them have been sold and used that most if not all of them can be reguarded as excellent anchors. Most newer anchors are good enough that one could just choose which one looked the best and buy. But which one is top dog is just not known.
__________________
Eric
North Western Washington State USA
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08-01-2018, 10:08 AM
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#17
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Guru
City: Miami River
Vessel Name: Gotcha
Vessel Model: Grand Banks. Heritage. 54
Join Date: Aug 2016
Posts: 2,988
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Nomad
How many anchors test well because of the testing parameters but don’t do as well in real life? I have no idea myself but I know I trust the opinions of those I know (many on this forum) if the tests agree with those opinions it’s a win.
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08-01-2018, 12:31 PM
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#18
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Guru
Join Date: Jan 2010
Posts: 1,181
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Here in our Anchorage A 30-foot sailboat has a vulcan and it seems to hold very well. there's also a 40-foot cat here that is sitting on a spade, he has dragged all around the lake and hit several boats. I do not know if his anchor is aluminum or Steel
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08-01-2018, 01:24 PM
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#19
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Guru
City: Annapolis
Vessel Name: Ranger
Vessel Model: 58' Sedan Bridge
Join Date: Aug 2013
Posts: 7,088
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Quote:
Originally Posted by Nomad Willy
Anyway it appears to me that quite a few newer anchors have not been seriously tested. Correct me if I’m wrong but I include the Mantus, Vulcan, Excel, and Boss anchors in this basically not tested category.
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Fortress included the Manson Boss (and Supreme) and the Mantus in the Chesapeake tests.
The entrants are in post 7:
http://www.trawlerforum.com/forums/s...est-15941.html
-Chris
__________________
Chesapeake Bay, USA
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08-01-2018, 01:56 PM
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#20
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
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Ranger,
Yes but that was an extreme mud test. Too specialized to tell if the anchors were good all-around anchors.
Motion,
The aluminum Spades don’t match the performance of the steel anchor. But most likely he snagged some debris. The real difference in holding power would probably go to the Spade but not to a degree that would promote a person to buy one or the other.
Fish,
You’d trust opinions over numerous experts in the field doing their best to limit the many variables? Mine included. You should read the anchor tests and then judge where the objectivity lies.
__________________
Eric
North Western Washington State USA
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