heeling, weather helm and rudder control - Page 3 - 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 > Skills and Seamanship > Learning to Sail
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #21  
Old 09-06-2004
Jeff_H's Avatar
Moderator
 
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 6,664
Thanks: 5
Thanked 103 Times in 79 Posts
Rep Power: 10
Jeff_H has a spectacular aura about Jeff_H has a spectacular aura about Jeff_H has a spectacular aura about
heeling, weather helm and rudder control

One minor point, I would like to comment on your note, "at all angles the rudder is nothing more than a brake". Strictly speaking, that is not true except on a dead run. All boats make a small amount of leeway (1 to 5 degrees being quite typical on a beat). That side slip is necessary to allow the keel to have enough of a incident angle to permit it to function as a wing and create lift resisting sideward motion. If the rudder is aligned with the centerline of the boat, then it is actually at an angle to the flow of the water. As counter intuitive as this may seem the helm would actually need to be to leeward to not act as a brake.

But that is only a small piece of the story because a little bit of weather help is actually a good thing from a performance basis. In the case of a boat with an attached rudder, a little bit of weather helm angle helps to make the keel act as an assymetrical foil and provide lift to windward slightly more efficiently. In the case of a spade rudder, a small amount of weather helm angle helps to provide lift that is in addition to the lift provided by the keel and therefore reduces leeway was well. Of course in either case that additional lift comes at the price of additional drag so there is a point where the losses due to drag offset the gains due to reduced leeway.

Respectfully,
Jeff
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
Tiller to wheel conversion costs? 808state Gear & Maintenance 13 06-30-2012 08:11 PM
Building a New Ruuder Armchairprotest Gear & Maintenance 16 12-06-2009 11:15 PM
Building a Rudder Newport 30 Armchairprotest Gear & Maintenance 5 04-07-2009 02:11 PM
Excessive weather helm? Jerry G Learning to Sail 16 08-27-2002 04:06 PM
weather helm zif001 Learning to Sail 3 07-30-2001 11:49 AM


All times are GMT -4. The time now is 04:50 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.