Determination of characteristics - 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 > On Board > Boat Review and Purchase Forum > Sailboat Design and Construction
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 04-15-2008
Senior Member
 
Join Date: May 2006
Posts: 825
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
chris_gee is on a distinguished road
Determination of characteristics

I am looking at a boat with the displacement given as 15000 dry and 17000 presumably with tanks filled. Which figure is typically given so that one can compare boat characteristics?
Secondly it comes in cutter or sloop. I would imagine sail area is compared on the basis of 100% foretriangle. The sloop area is 583 with main 302 jib 281. The cutter has the same main but staysail of 134 and a yankee given variously as 374 or 343 totalling 776-810. Is this because the cutter has the mast further aft so the foretriangle is a bit bigger? Even so that doesn't seem to fit because the yankee looked like say 75% of the foretriangle to me.
How does one compare sail area on a cutter v a sloop?
There is no bowsprit so if the mast is in fact moved back one would expect some some increase in foresail size to balance the boat with the same sized main, but then should you really add in the staysail as well as a larger foresail? The combined difference seems a bit high to me. The boat is a Cabot 36 and the figures come from both the original 1970s specs and the new ones since they have started rebuilding them so there is a possibility of a typo or the sailplan having been changed.
Reply With Quote Share with Facebook
  #2  
Old 04-15-2008
Ilenart's Avatar
Senior Member
 
Join Date: Jul 2007
Location: West Australia
Posts: 508
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 8
Ilenart is on a distinguished road
Quote:
Originally Posted by chris_gee View Post
I am looking at a boat with the displacement given as 15000 dry and 17000 presumably with tanks filled. Which figure is typically given so that one can compare boat characteristics?
The lesser figure sounds like the "Light" condition ie without crew stores, water or fuel. The heavier No is probably "Half-loaded" with crew. Half-loaded is a better number to use, however the Light number appears to be more commonly quoted in advertising. So long as you are comparing apples with apples it's not a big issue.

Quote:
I would imagine sail area is compared on the basis of 100% foretriangle.
Its suppose to be, however I have seen lots of Nos quoted that use actual sail area.

Quote:
The sloop area is 583 with main 302 jib 281. The cutter has the same main but staysail of 134 and a yankee given variously as 374 or 343 totalling 776-810. Is this because the cutter has the mast further aft so the foretriangle is a bit bigger? Even so that doesn't seem to fit because the yankee looked like say 75% of the foretriangle to me.
My guess is they are including the actual size of the sails, so the cutter measurement effectively includes the overlap.

Quote:
How does one compare sail area on a cutter v a sloop?
Assuming the mast is not moved you effectively have the same area to use irrespective of whether it is a cutter or a sloop. The performance will probably be fairly close. JeffH gives an excelent summary of sloop vs cutter here

Quote:
There is no bowsprit so if the mast is in fact moved back one would expect some some increase in foresail size to balance the boat with the same sized main, but then should you really add in the staysail as well as a larger foresail? The combined difference seems a bit high to me. The boat is a Cabot 36 and the figures come from both the original 1970s specs and the new ones since they have started rebuilding them so there is a possibility of a typo or the sailplan having been changed.
Not familiar with the Cabot 36. Anyone else help?
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
Cheoy Lee Luder's 36 AA3NK Cheoy Lee 33 09-25-2011 10:41 PM
Sailing characteristics of a PSC 31/32 mabugov Pacific Seacraft 12 02-21-2008 04:20 PM
Blue water charateristics Pub911 Sailboat Design and Construction 7 12-10-2007 02:53 PM
Sailboat Characteristics Site. Giulietta General Discussion (sailing related) 25 01-19-2007 11:52 PM


All times are GMT -4. The time now is 08:35 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

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.