To design a ballasted daggerboard? - Page 2 - 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
  #11  
Old 03-25-2011
bljones's Avatar
Senior Member
 
Join Date: Oct 2008
Location: South Coast Ontario
Posts: 8,188
Thanks: 32
Thanked 73 Times in 66 Posts
Rep Power: 8
bljones has a spectacular aura about bljones has a spectacular aura about
I am not a physicist, or a mathematician or even a rocket surgeon, but i figure to make the daggerboard compensate for the movement of crew and resistant to heeling, the daggerboard would have to weigh as much as the crew on board, which would make it impossible for aforementioned crew to raise it.

The low-buck solution is to bundle six- eight pool noodles together for each side, wrap in a sling of sunbrella with grommets sewn along the edge, then screw the floatation to the gunwales through the grommets. Much more stable, and still sailable.

Like this:
Dinghy Dogs - A Better Inflatable

__________________
It's 5 o'clock somewhere:


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

Last edited by bljones; 03-25-2011 at 07:39 PM.
Reply With Quote Quick reply to this message Share with Facebook
  #12  
Old 03-25-2011
PaulfromNWOnt's Avatar
Senior Member
 
Join Date: Aug 2010
Location: Fort Frances, ON, CA
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 5
PaulfromNWOnt is on a distinguished road
What Faster said.

It would be a simple matter to make up a small set of adjustable outriggers, and turn the Opti into a sort of trimaran. The idea is to set them so they extend at an upward angle so the boat will still heel somewhat, and simply "clamp" them to the gunwhales. Yes, it will interfere with the normal handling, but as you adjust them inward this effect will be lessened along with the stability. Just like training wheels.
Reply With Quote Quick reply to this message Share with Facebook
  #13  
Old 03-25-2011
Bene505's Avatar
Glad I found Sailnet
 
Join Date: Jul 2008
Posts: 3,691
Thanks: 6
Thanked 41 Times in 40 Posts
Rep Power: 8
Bene505 will become famous soon enough Bene505 will become famous soon enough
If the water is deep enough, make a long daggerboard with the bottom part made out of 10 pounds of lead. With a long board, that will provide a lot of stability.

If you can't go with more weight, go with more depth with the weight you can use.

Regards,
Brad
__________________
.
.
Great minds discuss ideas;
Average minds discuss events;
Small minds discuss people.
.
The best minds discuss sailing. I don't know why. It's a mystery!
.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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
Cal 39-Internally Ballasted? devemaster Cal 4 07-15-2010 01:53 AM
Stuck daggerboard imzens MacGregor 14 04-08-2009 01:25 AM
Centerboard/Daggerboard question klwood Gear & Maintenance 3 10-10-2008 02:45 PM
Daggerboard problem santacruzin Gear & Maintenance 13 11-06-2007 06:06 PM
centreboard versus daggerboard sailingforever General Discussion (sailing related) 4 06-06-2006 02:42 PM


All times are GMT -4. The time now is 12:47 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.