The Hull Truth - Boating and Fishing Forum

Go Back   The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > The Boating Forum
Search

Notices

Random Quote: IF I KNEW RETIREMENT WAS THIS ENJOYABLE,,I WOULD NOT HAVE WORKED FOR A LIVING
Reply
 
Thread Tools Search this Thread
Old 06-11-2007, 05:04 AM
  #1    
Senior MemberCaptains Club Member
 
Join Date: Oct 2006
Location: Saigon, Vietnam
Posts: 2,181
Default Homemade anchor & difficulty to set in strong current on muddy ground

Hi All.

==> the infos

Here is a "homemade" #304 anchor:



It is 10 pounds (4.6 kg) hooked to 20 feet of quite heavy chain. The fluke angle is 45 degrees (used by fortress for muddy ground) that I could set at 35 degrees with a pin for sandy grounds.

The boat is a 23' cuddy "not so heavy" (probably less than 3,000 pounds).

==> The problem


There is one shallow (8 feet) place in a narrow river where current is rather strong and I rarely can set this anchor. It just hooks a few than releases. Sometimes it only releases after some minutes. I tried with all possible rode/depth ratio.

I have added mud plates on the bottom w/o better result.

Unless it has been very good to me, even difficult to pull out when well set in the clay (even had to leave one once ).

Any idea whether this anchor is too light? Fluke too short? How I could improve? I have just been checking here:

http://www.danforthanchors.com/kits.html

to see that I am about in the right range.

Any idea?

Thanks

pierre
__________________
[
Left: Nissan 23' fishing boat 115 Hp
Right: 20" teak sandwich, a project I lead but do not build myself.... All timber has been 4-5 times epoxied (West) with one cloth and 9 PU lacquer glossy as a violin.
THT topic with explanations here:
http://www.thehulltruth.com/forums/t...ighlightmode=1
more pics here (all is mixed up):
http://s136.photobucket.com/albums/q...2PS/?start=all

life is too short to wait I can afford a nice boat
XV2PS is offline   Reply With Quote
Old 06-11-2007, 08:58 AM
  #2    
Senior MemberCaptains Club Member
 
Join Date: Sep 2005
Location: Salem, MA
Posts: 1,107
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

A 10 pound anchor is not gonna hold a 23' boat for long. I use a 22 pound for my 25' boat, the 17 pounder that came with it barely holds in a strong current. I call that one my "lunch hook".
__________________
1971 35' Bertram Caribe
"BLACK BART"
Grady Wahoo is offline   Reply With Quote
 
Old 06-11-2007, 11:46 AM
  #3    
Senior MemberCaptains Club Member
 
Join Date: Dec 2002
Location: Norfolk, VA, USA
Posts: 1,629
Default RE: Homemade anchor & difficulty to set in strong current on muddy ground

Interesting fabrication. Your mud plates on both sides will provide offsetting forces in heavy mud or sand.

Other than the challenge, why not purchase a nice Danforth 12H. It should do what you need.
ocnslr is offline   Reply With Quote
Old 06-11-2007, 02:54 PM
  #4    
Senior MemberCaptains Club Member
 
Join Date: Feb 2001
Location: Manassas Va USA
Posts: 3,955
Default RE: Homemade anchor & difficulty to set in strong current on muddy ground

I would try less angle.
Hawkeye is offline   Reply With Quote
Old 06-11-2007, 03:20 PM
  #5    
Senior Member
 
Join Date: Mar 2006
Location: South Carolina
Posts: 9,214
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

My 23'WA is 3500 lbs empty, add the fuel,engine,gear and passengers it appearts way to light. Why not try a grapple hook for your mud bottom. They are easly made from rebar and pipe , plans are on the internet.
__________________
Living in South Carolina, fishing any place. "People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf". G. Orwell
hhi angler is offline   Reply With Quote
Old 06-11-2007, 05:57 PM
  #6    
Senior MemberCaptains Club Member
 
Join Date: Apr 2002
Location: Minneapolis, MN USA
Posts: 166
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

I think your anchor looks good. Here in Minnesota, and most other places I have direct experience with you don't find mud on the bottom in places with really swift current. The bottom will be solid rock, or gravel. The higher the current the larger the gravel size. There are a few place I anchor on the Mississippi where the bottom is grapefruit sized or bigger cobbles. That is a real challenge. Why don't you try to build a Northhill? Almost every shrimp boat on the Gulf of Mexico has a shop built Northhill on the bow. They are easy to fabricate, very versatile, and stow well on a pulpit.

Jack
Minneapolis & Orange Beach
catadromous is offline   Reply With Quote
Old 06-11-2007, 08:06 PM
  #7    
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Feb 2003
Location: Thornton's Ferry,NH,USA
Posts: 9,623
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

Are you using a length of chain or hooking it directly to the rode? The weight of chain will help pull the anchor parallel to the bottom and dig better. Some people use a weight about 6-10 feet up the line from the anchor.

Good luck!
__________________
I'm not a boat expert, I just read THT!
Kamper is offline   Reply With Quote
Old 06-11-2007, 09:44 PM
  #8    
Admirals Club
 
Join Date: Jul 2006
Location: St George Island, Fl
Posts: 1,139
Default RE: Homemade anchor & difficulty to set in strong current on muddy ground

ocnsir has it right. Buy a Danforth Hi Tensile - 12H, this anchor will stick.

They are a little expensive, but often you can find them on ebay.
Bamaskeetshooter is offline   Reply With Quote
Old 06-11-2007, 10:20 PM
  #9    
Senior MemberCaptains Club Member
 
Join Date: Feb 2002
Location: Saugus, Ma. USA
Posts: 8,096
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

My guess is that the flukes are too short. It's probably grabbing ok, and then just pulling up the entire clod of mud above the flukes. Anchors don't do very well in mud overall, and Danforths hold even worse than others in mud, so you already have 2 strikes against you. A claw or plow would probably fare better, but if you stick with a danforth type, (a decent all around anchor) I would try lengthening the flukes.

A good test would be for you to find some mud similar to the bottom you are trying to anchor in, but in very shallow (like 1 ft deep) water. Try and set the anchor manually with your hands, and then try to pull it out (but not pulling straight up of course). See if the fluke angle is too steep and the back of the anchor is getting disloged first. If it looks like it's setting ok and then the whole chunk of mud breaks free, then I would look into longer flukes.
jobowker is offline   Reply With Quote
Old 06-11-2007, 11:16 PM
  #10    
Senior MemberCaptains Club Member
 
Join Date: Oct 2006
Location: Saigon, Vietnam
Posts: 2,181
Default Re: Homemade anchor & difficulty to set in strong current on muddy ground

Thanks all for the comments. Well, I would not mind that I buy a Danforth, but here in VN I do not know where to look for it

Re the weight, yes, it might be the problem in current, but I am in the same range as the Danforth.
Re other designs, I will have a look. Actually I was thinking to make my folk build a box anchor. Seems easy but really ugly...
Re the fluke, yes, I will lengthen it. I also had the feeling this might play. For the angle i will also try in shallow water to analyze.
Re the chain, well I think I get it heavy enough, maybe a bit short.

Thanks again

Pierre
__________________
[
Left: Nissan 23' fishing boat 115 Hp
Right: 20" teak sandwich, a project I lead but do not build myself.... All timber has been 4-5 times epoxied (West) with one cloth and 9 PU lacquer glossy as a violin.
THT topic with explanations here:
http://www.thehulltruth.com/forums/t...ighlightmode=1
more pics here (all is mixed up):
http://s136.photobucket.com/albums/q...2PS/?start=all

life is too short to wait I can afford a nice boat
XV2PS is offline   Reply With Quote
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Homemade anchor tutorial with pictures HullSlap The Boating Forum 20 04-21-2008 06:25 PM
fast current river anchor ffffg The Boating Forum 20 05-05-2007 12:56 AM
how NOT to navigate, against a strong current JUSTINTIME Dockside Chat 10 11-14-2006 06:51 PM
What is my current boat set-up worth?? TheBandit The Boating Forum 6 12-20-2003 02:52 PM

 



©2009 TheHullTruth.com

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0