Round Shaft Helix Mooring - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Out There > Cruising & Liveaboard Forum > Living Aboard
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 04-01-2009
Member
 
Join Date: May 2008
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
Freerider is on a distinguished road
Round Shaft Helix Mooring

Does anybody use one of these for a mooring?

Round Shaft Anchors

I know the more complex type helix are great systems, but I'm not interested in hiring someone to install one. The more simple round shaft helix I can install myself by SCUBA.

I'm concerned with their holding power, I've read their load is around 4000lbs, and sure that is dependent of different factors, including bottom type. My boat will be approx 32', 10' beam, 10000lbs displacement.

I'm not 100% sure what the bottom is like but I will be located in a BC inlet near the mouth of a river.

Do you guys think this type of mooring would be better than say a Rocna 20? I'm not sure if its a good idea to live long term and leave the boat for a week at a time (on rare occasion), and leave her hanging on an anchor.

I feel a permanent mooring would be a better idea however; this mooring can't reset itself if it lets go, a MAJOR disadvantage. I know an anchor should be able to look after my boat, or i should get a new anchor, but the idea of a permanent mooring seems more secure.

I know you guys will know the answer, so which would be better to avoid the price of marinas?
Reply With Quote Share with Facebook
  #2  
Old 04-01-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
A Rocna 20 is probably capable of holding with greater force than 4000 lbs., since the Rocna 15 was generating loads of over 5000 lbs. in the Sail magazine anchor test a couple years ago. However, a permanent mooring is a far better idea for a long-term solution.

How well a round shaft helix will work depends a lot on what the bottom composition is like and how deeply you can screw the helix anchor into the bottom. Without knowing what the bottom consists of, you're basically shooting in the dark. If it can hold 4000 lbs. of force, then it is probably sufficient for your boat, but you'd also have to size the chain and pendant properly.

See this page from the Hamilton Marine catalog regarding that:

__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #3  
Old 04-01-2009
Member
 
Join Date: May 2008
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
Freerider is on a distinguished road
Great diagram thanks!!

I guess if I thought 1 wouldn't hold, 2 wouldn't be such a bad idea.

Its just when i find them online, it says they're for "small" craft. "Small" could mean anything.
Reply With Quote Share with Facebook
  #4  
Old 04-01-2009
Bene505's Avatar
Glad I found Sailnet
 
Join Date: Jul 2008
Posts: 3,539
Thanks: 5
Thanked 37 Times in 36 Posts
Rep Power: 7
Bene505 will become famous soon enough Bene505 will become famous soon enough
If the helix achors are easy to put in, then they come out easily too. The professional installers use a machine that has (IIRC) 40 times the torque of a post hole digger. You can't come near that with scuba and a self-install.
__________________
Posts you might like:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. .

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. .
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. .
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. .
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
. .
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #5  
Old 04-01-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
The real key is what is the bottom in the location you'll be using it in. If the bottom type is wrong, you won't be able to use a helix mooring. I would also highly recommend that you talk to the company about the usage and the loads your boat will impose. While 32' LOA is a relatively small boat, yours is relatively heavy for a boat of that size.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #6  
Old 04-01-2009
Member
 
Join Date: May 2008
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
Freerider is on a distinguished road
Quote:
Originally Posted by Bene505 View Post
If the helix achors are easy to put in, then they come out easily too. The professional installers use a machine that has (IIRC) 40 times the torque of a post hole digger. You can't come near that with scuba and a self-install.
I agree with that to an extent, I would be screwing it in using a bar for leverage, but when its pulled its not being unscrewed.

You guys are both right on the bottom type, I guess I'll go dive on the site and then I'll know if its even a viable option.

Thanks

By the way, does anyone know of any charts that show the correlation between wind speed, and force exerted on an anchor/mooring? I'm sure it would complicated due to the variables in aerodynamics of different vessels.

Last edited by Freerider; 04-01-2009 at 10:11 PM.
Reply With Quote Share with Facebook
  #7  
Old 04-02-2009
Member
 
Join Date: May 2008
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
Freerider is on a distinguished road
I found this using google, I wonder why it didn't come up when i searched on here.

Anyways lots of questions answered.

Installed a helix mooring anchor last weekend...
Reply With Quote Share with Facebook
  #8  
Old 04-02-2009
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 9 Times in 9 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Cause Sailnet's search function sucks...
Quote:
Originally Posted by Freerider View Post
I found this using google, I wonder why it didn't come up when i searched on here.

Anyways lots of questions answered.

Installed a helix mooring anchor last weekend...
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Helix Mooring Anchors... one or two? Joel73 Gear & Maintenance 21 05-19-2009 03:45 PM
Replacing Cutlass Bearing SeaDeucer Gear & Maintenance 15 04-17-2009 03:41 PM
Mooring systems GoodOldBoat Good Old Boat 3 10-09-2007 09:05 PM
The Mechanics of Mooring Mark Matthews Seamanship Articles 0 05-19-2002 08:00 PM


All times are GMT -4. The time now is 11:58 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012