alternative scope formula - 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 > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 07-03-2008
Junior Member
 
Join Date: Jul 2008
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
MarkTilley is on a distinguished road
alternative scope formula

A few (4-6) years ago there was an article in one of the sailing magazines suggesting a scope formula that used a constant plus a multiple of depth be used rather than just a direct multiple of depth (e.g. 100' + 3 x depth vs. 7 x depth), unfortunately I can't remember the formula and I can't find the article in my back issues.

I've search this site and read Alain Fraysse's stuff but what I'm looking for is much simpler.

Does anybody remember seeing that article (or remember the values it used)?

Thanks in advance.
__________________
Mark Tilley
s/v Saving Grace
Saga 43 - 40
Reply With Quote Share with Facebook
  #2  
Old 07-03-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 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
I've never heard of a scope calculation formula that wasn't based on the depth of water at high tide + distance to the bow roller. It wouldn't make sense in most cases, since it would leave you anchored at relatively short scope in deeper waters, and leave you with an excessively large swinging circle in shallower waters, depending on what the constant and the multiplier were.
__________________
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 07-04-2008
Valiente's Avatar
Senior Member
 
Join Date: Jun 2006
Location: Toronto
Posts: 5,491
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
Valiente has a spectacular aura about Valiente has a spectacular aura about
The only time short scope seems appropriate to me is when you are anchoring off a ledge which may be at 10-15 feet and you are being blown directly off it over far deeper water. But even there the tidal stream and swell conditions could argue for a different approach.

In anchoring, the short cuts are really few and far between, I think.
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
Alternative Battery-Charging Systems Tom Wood Gear and Maintenance Articles 0 07-25-1999 08:00 PM
Alternative Battery-Charging Systems Tom Wood Cruising Articles 0 07-25-1999 08:00 PM


All times are GMT -4. The time now is 03:09 AM.

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

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.