[C320-list] Anchor

[Jeff Hare]

An interesting read on anchors, comparisons and design history is here:

http://www.petersmith.net.nz/boat-anchors/

Also has an interesting discussion about Manson supreme and the Rona.

Jeff

On Dec 1, 2012, at 9:51 PM, "Dennis Harris" <dharris02 at suddenlink.net> wrote:

> In selecting your anchor, chain, rode, you might want to visit this link: http://alain.fraysse.free.fr/sail/rode/anchor/anchor.htm
> 
> The difference between a 25 lb. and 35 lb. anchor of the same design is more than a weight issue.  The heavier anchor is larger and has more area to resist the pull from the boat in the wind conditions. As I understand it, the length of the chain (in the case below 15' or 30'), is more about helping set the anchor by pulling the end of the shank parallel to bottom, and giving some measure of chafe protection to rode from sharp objects on the bottom.  In low winds, you might not lift the chain off the ground with the forces on the rode.  In high winds, there will be sufficient tension in the rode to pull it straight so that it does not contact the bottom, and the weight of the chain, 15', 30' or more, doesn't really figure into the holding power of the anchor.  Also, in selecting the rode, it should be sized to keep it within the working strength of the rode, which is usually about 15-20% of breaking strength. (In helping set the anchor and for chafe protection, I think 30' is probably better than either 15' or 20')
> 
> For those who want to carry a larger anchor for storms, the new Mantus anchors easily/quickly disassemble into three more or less flat components (6 1/2" bolts) which store well in the cockpit locker.
> 
> On my boat, I have a 33 lb. Genuine Bruce on the anchor roller, 22 lb. West Marine Danforth type in anchor locker, and 35 lb. Mantus as a storm anchor....20 ft. of chain/1/2 " nylon rode on Bruce and Danforth, 30 ft. of chain/5/8" nylon rode for Mantus.  But each will have to make his own decision...I don't claim to have any great knowledge on the subject.
> 
> Dennis Harris C320 #694
> 
> ----- Original Message ----- From: "dprudden" <dprudden at comcast.net>
> To: <C320-List at Catalina320.com>
> Sent: Saturday, December 01, 2012 6:53 PM
> Subject: Re: [C320-list] Anchor
> 
> 
> Art,
> Any idea what is better-25# anchor with 30' of chain or 35# anchor with 15' of chain? Weight will be about the same.
> 
> Thanks,
> David Prudden
> #787
> 
> 
> Sent from my iPhone
> 
> On Dec 1, 2012, at 5:41 PM, Arthur Miller <millers1 at aol.com> wrote:
> 
>> 
>> Based on anchoring a fair bit while cruising the NE coast:
>> Bottom conditions are a big factor in the type and size to use.
>> The biggest influence I have found is the length and size of chain used to
>> get max. anchor performance.  I go with the anchor size recommended (less weight
>> On bow is better) and use at least a boat length of chain.
>> I carry another 30'  of chain in aft storage to add if it looks like a blow may come in.
>> Art. #680
>> Sent from my iPad
>