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 Sail Sizing		  New Topic  Topic Locked
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boatgt
Navigator

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117 Posts
Initially Posted - 10/25/2005 :  16:20:29  Show Profile
Hello, When I bought my c25 I got a few sails with it but am not quite sure what is what?
Is there a list somewhere that states the exact measurements of lets say 70, 110, 150, jib/genoa?
Thanks
Gene
Gene
1981 C25 TR/FK
East TN
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mashedcat
Navigator

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USA
194 Posts
Response Posted - 10/25/2005 :  16:35:25  Show Profile
i know there is somewhere on the site that has the numbers, but i dont know where. i do know this resource http://quotesys.sailrite.com/quoting/boatdetb.cfm?KEY=Int(3290)&Length=25&searchstring=CATALINA%2025&cartid=
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 10/25/2005 :  16:49:31  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by boatgt</i>
<br />Hello, When I bought my c25 I got a few sails with it but am not quite sure what is what?
Is there a list somewhere that states the exact measurements of lets say 70, 110, 150, jib/genoa?
Thanks
Gene

<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Gene,

If you multiply the C25's J dimension (10.5') by the desired percentage (70, 110, 150, etc) it will equal the luff perpendicular (LP) measurement of the sail which is used to determine headsail size.

For example: 10.5 (J Dimension) X 1.5 (150% genoa) = 15.75' (LP)

The luff perpendicular (LP) is the shortest distance between the clew and the luff.



If you have the LP of the sail and you want to determine the percentage, simply divide the LP measurement by the J dimension (10.5).

For example, if the LP of the sail is 11.55', divide 11.55 by 10.5.
11.55/10.5 = 1.1 (110%)
Edited by - dlucier on 10/25/2005 16:57:06
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boatgt
Navigator

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117 Posts
Response Posted - 10/26/2005 :  22:40:32  Show Profile
That makes perfect sense, and nice diagram! I will pull them out tomorrow and measure.
Gene
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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts
Response Posted - 10/27/2005 :  08:46:31  Show Profile  Visit Frank Hopper's Homepage
I have ordered a new furling headsail from Ullman Ventura, (they built the national champion's suit of sails) and it brought into focus how many decisions there are associated with sail size. If you look at Don's diagram there is a fairly standard clew height; put that sail on a furler and that sail's clew will probably be raised up several feet by "cutting" the foot and rob the sail of many square feet of sail area while still measuring the same at the LP. High clew sails are very common on furlers and cruising boats where people want to see under the sail foot. I have specified a full hoist 135 (most 135's have a shorter hoist than 150's), with as low a clew as possible to increase the sail area while still having an LP that is easier to tack than a 150.
Other decisions:
weight...7.35 oz
draft... shallow
tell tail windows... 3
foam luff... yes
100% tell tails... 3
type of UV protection... UV dacron instead of sunbrella
color of UV protection... white
Colors of sail panels... white
Sail numbers... yes
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.