[Public-list] bow roller for cqr anchor

[John Birch]

Hi Dave, et al,
One more suggestion if you don't mind.

The bow roller should only be loaded when setting and retrieving the 
anchor - the rope rode if used should, while at anchor be run through the 
bow chocks. If using all chain, a rope with a proper chain hook should be 
run from your bow cleat, through the chocks and hooked on to the chain above 
the water with the chain let out so it forms a loop of chain - this takes 
the shock loading out of the system.

We carry 200' 5/16 High Test chain (Group 40) on Sunstone and use a 50' 1/2 
snubber line with a high test 5/16 chain hook - 95% of the time we only use 
the first 6 -10 feet of the snubber. The rope shock absorber runs through 
the bow chocks. The extra 40' is in the event you need to veer more scope, 
you can just let out the chain and rope snubber to increase your ratio 
without having to haul in and then disconnect the chain hook. This is a 
blessing at night when you are tired as it keeps the likelihood of errors to 
a minimum when you are tired and visibility sucks ; )

If you have a windlass or capstan it should never be left loaded under 
tension at anchor - use the snubber line. Your gears and bearings will last 
so much longer.

Just a suggestion. Hope it is a help.

Cheers,
John


----- Original Message ----- 
From: "David Terrell" <DTERRELL at message.nmc.edu>
To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
Sent: Thursday, August 10, 2006 12:01 PM
Subject: Re: [Public-list] bow roller for cqr anchor


> my solution does not project much - I wanted a maximum of support. I do
> have problems with the anchor banging the bow. Thanks for the insight.
>
>>>> "John Birch" <Sunstone at cogeco.ca> 08/09/06 11:23 AM >>>
> Someone asked why one would have any more overhang than the minimum for
> a
> bow roller. I would suggest there is a balance between the cantilever
> of the
> overhang and the amount of expected swing of the proposed anchor to be
> used.
> Insufficient projection means the anchor will likely bang on the hull
> as the
> boat bobs while retrieving or launching. Too much overhang results in
> excessive loading due to cantilevering on the fittings. Like everything
> is
> sailing, its a balancing act.
>
> Our forward roller is about 8" fwd of the bow, the second on the port
> side
> of the bow about 5-6" - either anchor can be launched independent of
> the
> other. On our A-37 Sunstone, when cruising, we carry a primary 45lb CQR
> in
> the Stb Bow Roller and a 33lb Bruce in the Port bow roller. We have
> large
> flange cheeks on the roller to keep the anchor,  chain & rodes captive
> so it
> can't jump off the roller and chew the hull. It is a custom design
> drawn by
> me and fabricated by Klacko Spars in Oakville Ontario Canada. The cost
> was
> not much more than a pair of off the shelf robust rollers. In polished
> stainless, it looks quite nice and we have had a lot of compliments -
> it
> does not detract from the aesthetics of the bow and in fact compliments
> it.
>
> Just my 2 Canadian cents worth - which at the current exchange rate is
> rapidly approaching the value of 2 US cents ; )
>
> Fair winds and following seas to all,
>
> John
>
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