Problems with anchor roller

[mriley]

After a close shave with a Bruce anchor I recently changed to a Delta. I have a custom made roller, as an off-the-shelf one won't fit my foredeck arrangement. The new anchor sits well, but when released, pivots on the roller, the shank swings up and out while the pointed end of the fluke impacts against the stem of the boat. After some wrestling, it can then be lowered. On weighing anchor, point impacts against stem until second pair of hands can bear down on shank to lift point up and away. Does anyone have any suggestions, or a design of a roller that will allow the anchor to slide out and down without pivoting. There is not much scope for extending the roller assembly outwards - the cantilever effect would be too great. Any advice gratefully received.

 

[Talbot]

If you add a cantilever section on the roller (as in the picture), this will help both launch and recovery.

 

[damo]

A rocking roller as above may do the trick, but in the meantime I saw a really neat trick to prevent bow damage. A local sports fisher glued a shaped piece of car rubber floor mat to his bow. It seems very effective, has lasted over a year of heavy use, and looks surprisingly good (and a lot cheaper and easier than fabricating a shaped sheet of s/s)

 

[William_H]

Just as a way out idea. If you had an extended stock on the anchor then the chain would have more leverage to lift the anchor pointy end and pull down the inboard end.
A piece of galvanised steel tubing or even stainnless steel tubing could be flatted to slip over the stock bolted in place where the chain is shackled on. The chain is shackled onto the end of the tubing.
Or two pieces of flat iron could be bolted to the sides of the stock to extend it. I imagine an extension of 15cms would improve things.

I don't think a longer stock would change the anchoring characteristics. Sorry just a crazy thought olewill

 

[GMac]

[ QUOTE ]
I don't think a longer stock would change the anchoring characteristics. Sorry just a crazy thought olewill

[/ QUOTE ]

It will than likely will change how the anchor works. Try but with much caution if you must.

2nd post has the right idea.

 

[ean_p]

The RN has a similar thing on HMS Explorer except that this one not only tilts on the pivot bolt but also slides at a slight down angle to the horizontal and so increases the overhang during launch and recovery and when snugged home the side is inner most hence removing any overhang. hard to describe but so obvious when you see it.

 

[craigsmith]

[ QUOTE ]
After a close shave with a Bruce anchor I recently changed to a Delta. I have a custom made roller, as an off-the-shelf one won't fit my foredeck arrangement. The new anchor sits well, but when released, pivots on the roller, the shank swings up and out while the pointed end of the fluke impacts against the stem of the boat. After some wrestling, it can then be lowered. On weighing anchor, point impacts against stem until second pair of hands can bear down on shank to lift point up and away. Does anyone have any suggestions, or a design of a roller that will allow the anchor to slide out and down without pivoting. There is not much scope for extending the roller assembly outwards - the cantilever effect would be too great. Any advice gratefully received.

[/ QUOTE ]Rollers designed for Bruces tend not to work very well with anything else. If this is the case, you may be looking at having to rebuild the roller assembly to get satisfactory behavior.

The Delta has a pretty good shank shape intended to self-launch, and unless you're releasing the chain so quickly and without resistance such that the anchor acts like it has no chain attached at all, it should slide out forward before it rotates that much. I would experiment with how you launch it.

When the anchor comes up, if you do it slowly such that the anchor is not jerking around, does the tip clear the stem?

The tilting dual-roller is not likely to help. These are intended to help anchors self-launch, which doesn't sound like your problem. Unless the front roller is moved forward, you would continue to have the same issue.

[ QUOTE ]
Just as a way out idea. If you had an extended stock on the anchor then the chain would have more leverage to lift the anchor pointy end and pull down the inboard end.
...
I don't think a longer stock would change the anchoring characteristics. Sorry just a crazy thought olewill

[/ QUOTE ]It most certainly would - this would be a truly stupid thing to do considering the poor OP is trying to end up with an anchor superior to his old Bruce, not worse...