tacking angle - 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 > Out There > Racing
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #21  
Old 05-22-2012
paulk's Avatar
Senior Member
 
Join Date: Jun 2000
Location: CT/ Long Island Sound
Posts: 2,533
Thanks: 4
Thanked 20 Times in 19 Posts
Rep Power: 15
paulk is on a distinguished road
Re: tacking angle

As we said several years ago, each boat responds differently to different conditions, and optimum trim will vary according the the boat, the conditions, the crew, and the skipper. Everybody's right at some point. Whoever wins the race is right more often.
Reply With Quote Share with Facebook
  #22  
Old 05-23-2012
SchockT's Avatar
Senior Member
 
Join Date: May 2012
Location: North Vancouver, BC
Posts: 1,374
Thanks: 0
Thanked 21 Times in 20 Posts
Rep Power: 3
SchockT is on a distinguished road
Re: tacking angle

As stated by others, the answer to the original question really depends on the boat, the sea state, etc. Typically in light air you wouldn't be TRYING to point as high as possible, at least not until you have built up some boatspeed.

The boat's keel design is a large determining factor. My current boat has a pretty conventional deep fin keel with a pretty big chord length, (the fore-aft measurement) which makes it very forgiving. It will start to develop enough lift to start to point at relatively low speeds. In higher wind ranges it points very high. My last boat, on the other hand, was a high performance racer with a very deep narrow chord fin with a bulb. That keel required much higher speeds in order to start generating lift. In lighter winds I could not even think about pointing with other boats in the fleet until I got moving.

As for shoal draft keels, there is just no way a shoal draft boat will be able to point as high as a deep draft keel. Two identical boats, one with shoal one with deep, and the deep draft boat would KILL the shoal up wind every time. The shoal draft just doesn't have the surface area to generate the lift.
Reply With Quote Share with Facebook
  #23  
Old 05-23-2012
Jeff_H's Avatar
Moderator
 
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 6,503
Thanks: 3
Thanked 81 Times in 62 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
Re: tacking angle

Quote:
Originally Posted by SchockT View Post
The shoal draft just doesn't have the surface area to generate the lift.
To be more accurate, the shoaler draft keel does not have the efficiency to generate equal lift to an equal-area, higher-aspect ratio, equal foil section, keel and the shoal keel will generate more drag if given a large enough area to provide equal lift at an equal speed. Drag of course is one of the big controlling elements in the ability to maximize VMG to windward at any particular wind and wave condition.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Curmudgeon at Large- and rhinestone in the rough, sailing my Farr 11.6 on the Chesapeake Bay and part-time purveyor of marine supplies
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
Windward performance deseely General Discussion (sailing related) 21 04-01-2012 02:42 PM
Traveler question sohi07 Learning to Sail 11 10-21-2006 11:47 AM
What is the point of a traveller? dwbecker Learning to Sail 9 09-25-2006 08:35 PM
Tacking and Jibing a Multihull Kevin Jeffrey Seamanship Articles 0 11-18-2003 07:00 PM
Tacking Angles Dan Dickison Racing Articles 0 02-01-2002 07:00 PM


All times are GMT -4. The time now is 10:01 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