Anchor types and General questions

[malbert73]

Originally Posted by LongRange

Is the Mantus able to self-launch?



The shank seems completely straight, except for a very small angled section at the very front. I cannot see how that would self-launch except if the roller assembly is itself pointed downwards, and having to push a 30kg+ anchor off the bow presents its own challenges.

My 2 mantus anchors have self-launched easily. Most of weight is in fluke, base of shank so as soon as you let out chain the weight of the anchor makes the shank tilt up and slide down roller. I'm not sure the shank has changed but mine is straight except for angulation near heel of shank.


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[Panope]

Originally Posted by LongRange

Thank you Steve. I see what you mean, and it does seem like a worthwhile improvement.

Now if only I could get Italian suppliers - whom I mostly do not understand because despite being in Italy I do not speak Italian - to tell me whether their stock of Mantus anchors has "that new bent bit at the front?"

By the way, have you tested the Rocna perhaps, and if so could you maybe point me to the results? I appreciate your methodical test technique, and the effort you invested to share that information with the yachting community.

Andre

Thanks again, Andre.

Hear you go:

https://www.youtube.com/watch?v=WL9JL9AK6ss&t=22s

[Mr B]

Originally Posted by Panope

Thanks again, Andre.

Hear you go:

What would you suggest as to the reason this Rocna wont reset easily other than crap on the anchor,
Is the point not heavy enough to make it dig in,

Thanks, Brian,

[LongRange]

Originally Posted by malbert73

My 2 mantus anchors have self-launched easily. Most of weight is in fluke, base of shank so as soon as you let out chain the weight of the anchor makes the shank tilt up and slide down roller. I'm not sure the shank has changed but mine is straight except for angulation near heel of shank.

Thanks, that's good to know.

I am tending toward the Mantus but the self-launching capability had me concerned. For several reasons I prefer the idea of an anchor which I can cast off by pushing a windlass control button back at the helm.

[Cotemar]

Originally Posted by Mr B

What would you suggest as to the reason this Rocna wont reset easily other than crap on the anchor,
Is the point not heavy enough to make it dig in,

Thanks, Brian,

Their are 2 issues at play on this Rocna short scope set re-set video.

1) Rocna has lower tip weight.

2) Rocna has a tip with the Chisel point UP, so it does not perform consistently on a short scope pull.

http://www.cruisersforum.com/forums/...ml#post2396298
.
.

[Panope]

Originally Posted by Mr B

What would you suggest as to the reason this Rocna wont reset easily other than crap on the anchor,
Is the point not heavy enough to make it dig in,

Thanks, Brian,

Brian,

The Rocna Anchor performs absolutely brilliantly when it is clean. Therefore, I have to believe the problem lies with the retention of sub-strait on the fluke. That said, more tip weight would likely improve the anchor (or any anchor).

I did not have the opportunity to scrutinize (mangle ) the Rocna the way that I did with the IDENTICALLY PERFORMING Manson Supreme.

Please review the following Manson Supreme video. I made numerous, changes to the anchor including modifications to the tip (to ensure proper contact with the sea-bed). Note that the only change making significant improvement was simply drilling holes in the fluke.

Steve

https://www.youtube.com/watch?v=HvrzP65h5SE

[Mr B]

Originally Posted by Cotemar

Their are 2 issues at play on this Rocna short scope set re-set video.

1) Rocna has lower tip weight.

2) Rocna has a tip with the Chisel point UP, so it does not perform consistently on a short scope pull.

http://www.cruisersforum.com/forums/...ml#post2396298
.
.

That sheds a lot of light on it, Thanks,
Ive never used short scopes any way, Every thing I have goes over the bow, Just making sure my 360 Degree swing misses everything near me,
I dont park near crowds either, unless conditions arent favorable, The odd marina, Saves any hassles,

[hsi88]

Their are 2 issues at play on this Rocna short scope set re-set video.

I think there is more here than that. The scope used on the reset was 3.5 to 1 and they reset at 2-3 knots. The bottom was also loaded with material. No question, the Rocna was not the top anchor in his test, but I'll take my chances with this anchor any time when compared to earlier technologies.

There is no doubt anchors continue their march forward. The Rocna was one of the first of the new generation anchors and they have since come out with the newer Vulcan anchor. Also, there are probably some simple adjustments that can be made to the Rocna to make it a top performer. They tested with drilled holes to clear some of the debris with great success. Changing the chisel angle could also provide improvement.

What's cool is this march of technology will make is safer for all of us!

[downunder]

Originally Posted by Mr B

What would you suggest as to the reason this Rocna wont reset easily other than crap on the anchor,
Is the point not heavy enough to make it dig in,

Thanks, Brian,

Hi Brian,

Happend to run into Rex from Anchorright at SCRIBS boatshow last weekend and was speaking regarding the development of the Super Sarca some years ago.

The original Super Sarca was concave (yes - before Rocna/Manson) and Rex had problems in NZ with them resetting because of mud buildup so he changed the Super Sarca to convex to overcome that issue.

I believe Rex is based very close to you and I am sure he would be more than happy to discuss the issue and anything else about anchors. There is little he has not had experience with.

cheers

[Mr B]

Originally Posted by Panope

Brian,

The Rocna Anchor performs absolutely brilliantly when it is clean. Therefore, I have to believe the problem lies with the retention of sub-strait on the fluke. That said, more tip weight would likely improve the anchor (or any anchor).

I did not have the opportunity to scrutinize (mangle ) the Rocna the way that I did with the IDENTICALLY PERFORMING Manson Supreme.

Please review the following Manson Supreme video. I made numerous, changes to the anchor including modifications to the tip (to ensure proper contact with the sea-bed). Note that the only change making significant improvement was simply drilling holes in the fluke.

Steve

Thanks Steve,
Ive seen that one before, along with a lot of others, I did a lot of research before I made my own Anchor,
Because I can, I have a full engineering workshop and I have all the qualifications, (Theory and Practice) you can poke a stick at,
Plus 50 odd years of motor boats and anchoring, Ship Building and repair,
I Forged an 8 Ton D shackle for an anchor on a ship, They lost the original one,
So Im not really an amateur when it comes to anchors and shipping,
My Anchor cost me a bit of time, A bit of electricity and a bit of welding wire and a few Cut off wheels,

I did alter it after I made it, There wasnt enough weight on the point, Watching yours and others video's on the weight of the point,
I cut the roll bar and widened it one inch on each side at the flukes,
That increased the weight on the point to 28 Lbs from 15 Lbs, on a 75 Lb anchor,

I didnt want to add more weight as it was heavy enough already, Its that weight simply because of what its made from, I didnt weigh any thing when I was making it, Its just scrap steel, Offcuts, I had laying around my yard,
The shank is 16 mm thick, 110 mm wide, with a 25 mm slot, 660 Bissalloy, The flukes are .26 chrome Boilerplate, The point is 16 mm Stainless, 316,
If it wasnt heavy enough, I could always plate it to add more weight,

I cant try it out untill my boat is finished, Then it will be in 6 to 8 knot running tides,
Entrance to Westernport Bay, Victoria Australia,
I have confidence in it working, But it remains to be seen, If not I will alter it till it does, It will work up to my standards before I leave Melb to go around OZ,
I hate dragging anchors,

I love your reviews, They are excellent, Real time action, Very Informative,


Brian,

[Mr B]

Originally Posted by downunder

Hi Brian,

Happend to run into Rex from Anchorright at SCRIBS boatshow last weekend and was speaking regarding the development of the Super Sarca some years ago.

The original Super Sarca was concave (yes - before Rocna/Manson) and Rex had problems in NZ with them resetting because of mud buildup so he changed the Super Sarca to convex to overcome that issue.

I believe Rex is based very close to you and I am sure he would be more than happy to discuss the issue and anything else about anchors. There is little he has not had experience with.

cheers

Ive met Rex at his house where he makes the anchors, He Lives 15 kays from me, He showed me the first video's of his anchors being tested,
He is a great bloke and very informative,

But its nice to be able to say, Thats my anchor on the front, I made it, And it does work, When I sink it in the ocean, I will find out, Hahaha,

[Tkeeth]

Went out last weekend to Ship Island and anchored. My new 55lb. Mantus set first time and held great. I may have backed down on it too hard, it was a little stiff breaking it! Glad I went that way.

[Don C L]

I don't think it is possible to back down too hard on an anchor. It will get backed down a lot more in a decent wind and swell.

[a64pilot]

Originally Posted by Don C L

I don't think it is possible to back down too hard on an anchor. It will get backed down a lot more in a decent wind and swell.

If you do do bury one good though it may be advisable to have a trip line on it.
In prepping for last years hurricane I anchored in a Bayou and did my best to bury my 40 kg Rocna. I had a heck of a time getting it out, took a good 30 min or so