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Old 20-01-2016, 18:47   #121
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Re: Videos of Anchors Setting

Ok, good point on the leverage re breaking out an anchor. If that is not a good indication of burying depth, then I guess we'll have to reply on direct visual evidence from your excellent videos. Anyway, seeing is believing.

I recall an incident many years ago when on a diving trip to GBR and 2 boats were trying to anchor in mixed sand coral rubble. We dived on both anchors after they had been backed down hard, and one buried quite well (shaft almost buried) while the other one didn't dig in to the same degree.

The shallower set anchor dragged badly when the wind got up to about 20Kn +, the other deeper set didn't budge.

Seems to me that some anchors that set fairly "shallow" are relying more on the cohesive frictional forces of whatever substrate they are in and in some conditions like the fluffy sand and coral rubble, they have lower holding power.

It would be a great thing to test but you'd need a way to really put some serious pulling power on the anchor to simulate high wind situations.

Steve, why don't you go get a bigger engine and prop?
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Old 20-01-2016, 20:49   #122
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Re: Videos of Anchors Setting

Steve,

Very nice videos, and very smart setup with the camera.

Thanks

Ken
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Old 21-01-2016, 06:12   #123
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Re: Videos of Anchors Setting

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..................Steve, why don't you go get a bigger engine and prop?
Nooooooooooo! Not again. I have already upped Panope's engine from 15 to 40 HP. I built new engine beds, new shaft log and englarged the aperture to accommodate a much larger prop!!!

But seriously, many other anchor tests have focused on the maximum holding power of the anchors. My aim has been to focus on how the anchos set and re-set.

Steve
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Old 21-01-2016, 06:20   #124
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Re: Videos of Anchors Setting

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Steve,

Very nice videos, and very smart setup with the camera.

Thanks

Ken
Thanks Ken,

I just re-watched some of my first anchor videos. They are really poor compared to my latest offerings. Hopefully I can keep improving the set-up.

Steve
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Old 21-01-2016, 12:56   #125
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Re: Videos of Anchors Setting

Good on ya, Panope,

Great thread. MAYBE THE MODS COULD MAKE IT A ''STICKY''.

Ann
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Old 21-01-2016, 13:49   #126
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Re: Videos of Anchors Setting

Thanks Ann,

I think the Mods are one step ahead of you. If you click on the "Anchoring and Mooring" forum, you should find this thread (and Noelex's "Photos" thread) stuck right at the top.

Cheers,

Steve
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Old 21-01-2016, 21:41   #127
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Re: Videos of Anchors Setting

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Originally Posted by Ann T. Cate View Post
Good on ya, Panope,

Great thread. MAYBE THE MODS COULD MAKE IT A ''STICKY''.

Ann


Hi Ann


Both this thread and Noalex's thread are "Sticky's". And with Panope's and Noalex's kind permission, I've edited in a reference in the first post on both threads refering to the other thread. Anyone starting on one thread will be made aware of the other one.


Both threads are a tremendous ressource for any cruiser who is going to anchor out. I like to think ( in my ego-inflation way) that I know a bit about anchors and anchoring.




I've learned a lot about the subject from both threads
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Old 25-01-2016, 18:25   #128
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Re: Videos of Anchors Setting

I took the boat out today for another test of the Mantus and I got side tracked.

Sail cover had not been off for more than 2 months.

Steve

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Old 25-01-2016, 21:34   #129
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Re: Videos of Anchors Setting

Looks like you had a good day sailing

With all the work you've been doing - a day off can be granted (just don't make it a habit)
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Old 25-01-2016, 21:43   #130
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Re: Videos of Anchors Setting

Ha, good to be reminded why we have anchors.. They go on boats so we can sail places.

She looks to be slipping along beautifully, and you snuck two anchors into the video, nice.
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Old 27-01-2016, 06:54   #131
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Re: Videos of Anchors Setting

What a great thread! Thanks so much to Steve for making his results so transparent for us all to see for ourselves. Hard to believe anyone would go to this much trouble but we all have our hobbies and I'm very glad that you chose this one, it's a great public service to anyone who depends on an anchor to set and hold. It's nice to see HOW the anchor sets and at what angles it starts to become compromised. I also like how you've done such a great job at being consistent from test to test so you compare apples to apples as much as is possible outside of the completely controlled environment of a lab. Outstanding!
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Old 01-02-2016, 15:55   #132
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Re: Videos of Anchors Setting

Thanks jtsailjt, I figure this hobby is just as good as any other. After I sell off the extra anchors, it will have only cost me some diesel (about 1 quart per test).

Here is the Mantus performing in the usual manner over at the "Point Hudson" sand/gravel site at 3.5 to 1 scope.

Steve

Video #37
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Old 01-02-2016, 17:37   #133
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Re: Videos of Anchors Setting

.......And the requisite 2.5 to 1 test at the "Point Hudson", sand/gravel site.

The Mantus performed well. However, I noticed the anchor did not set as "hard" at this short scope. Also, the anchor seemed to not bury quite as deeply and had much less resistance when retrieving.

Video #38
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Old 07-02-2016, 21:00   #134
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Re: Videos of Anchors Setting

Mantus Anchor. Reducing scope test. This is the test where I first set the anchor in the normal fashion at 3.5 to 1 scope. Scope is then reduced incrementally until the anchor releases.

The performance of the Mantus in this test was impressive. Of all the anchors I have tested, only the Manson Supreme did better.

Steve

Video # 39
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Old 07-02-2016, 22:45   #135
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Re: Videos of Anchors Setting

Mantus Anchor. Deep Setting. This is the test where I set the anchor in the normal spot at 3.5 to 1 scope. I then move the anchor rode and belay at the stern of the vessel. This allows maximum pulling thrust by using forward engine power (Max forward thrust = 910 pounds).

The anchor performed very well. However, I stopped the test prior to the anchor achieving it's maximum penetration. The anchor was still moving horizontally and downward (unbeknownst to me) at a very slow rate when I reduced power. My feeling is that if I had kept the power on longer, the anchor would have eventually buried deep enough and stopped moving.

Steve

Video #40
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