Catalina - Capri - 25s International Assocaition Logo(2006)  
Assn Members Area · Join
h.jpg Home.
a.jpg Association Forum
s.jpg Ships Store
c.jpg Cruising
r.jpg Racing
t.jpg Technical Tips
g.jpg Photo Gallery - New
o.jpg Boat Search - Updated
m.jpg Manuals & Brochures
3rdrpt.jpg Swap Meet
l.jpg Links
f.jpg Officer Flag Line & Staff
b.jpg Bylaws & Constitution
 
1.jpg Members Area
1.jpg Join the Association
 
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.
 
Association Forum
Association Forum
Home | Profile | Register | Active Topics | Forum Users | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 What are Polars?		  New Topic  Topic Locked
 Printer Friendly
Author Previous Topic Topic Next Topic  

Gloss
Master Marine Consultant

Member Avatar

USA
1916 Posts
Initially Posted - 07/13/2004 :  11:55:47  Show Profile
Hi there,
Every so often is see in a discussion,or article, a reference to polars? What are they. How do they affect me? Why should I care? Are they affected by sail selection? wind? boat? beer? wind direction? beer? stock market?

I'll bet the racers out there know the answer to this one.
Frank Gloss
Formerly 89WK/TR
85 Ericson 32-3 shoal draft "Molto Bene"
Edited by - on

sdaly66
Navigator

Members Avatar

USA
143 Posts
Response Posted - 07/13/2004 :  12:53:19  Show Profile
Polars refer generally to a diagram that describes a boat's best performance on different points of sail. Usually the North position of this circular chart represents dead on (the irons) and curving lines around the chart show relative speed at the various points of sail (the farther the line is from center, the better the potential spped).
Edited by - on
Go to Top of Page

JimB517
Past Commodore

Members Avatar

USA
3285 Posts
Response Posted - 07/13/2004 :  13:29:59  Show Profile  Visit JimB517's Homepage
Yes, and you would have one polar for every wind speed, and every sail combination, and of course variations of load, rigging adjustments, and so on.

Generally the polar diagram has a variety of wind speeds plotted on the same chart in different colors. Also you only need the chart from 0 to 180 degrees (your boat is symmetrical) so sometime they plot the polar for wind speed 0-5 on the right and then 5 - 10 on the left, etc.
Edited by - on
Go to Top of Page

Lightnup
Master Marine Consultant

Members Avatar

USA
1016 Posts
Response Posted - 07/13/2004 :  22:11:09  Show Profile
So apparently I was wrong when I guessed that polars were either sunglasses or big white bears to avoid when sailing through ice packs?

Boy do I have a lot to learn.

Steve
Edited by - on
Go to Top of Page

MattL
Admiral

Members Avatar

USA
990 Posts
Response Posted - 07/14/2004 :  01:54:59  Show Profile
I don't know if that is all you got to worry about, my sister-in-law is kind of polar too.
Edited by - on
Go to Top of Page

Todd Frye
Navigator

Members Avatar

USA
222 Posts
Response Posted - 07/14/2004 :  10:20:21  Show Profile
Which begs the next question, does anyone out there have "polars" on their C-25? I would be interested to see such a chart, even though there will be differences in all our boats because of model, rigging and sail inventories. Thank you. Todd Frye
Edited by - on
Go to Top of Page

Brooke Willson
Admiral

Members Avatar

USA
983 Posts
Response Posted - 07/14/2004 :  10:57:37  Show Profile
But Matt, is she also bi?

Brooke
Edited by - on
Go to Top of Page

JimB517
Past Commodore

Members Avatar

USA
3285 Posts
Response Posted - 07/14/2004 :  12:47:13  Show Profile  Visit JimB517's Homepage
I would also like to have the polars for a C25. Perhaps I can start gathering the data to make them (anyone want to donate an accurate annemometer)?
Edited by - on
Go to Top of Page

Charlie Vick
Captain

Members Avatar

USA
423 Posts
Response Posted - 07/14/2004 :  14:36:17  Show Profile
I have an ex that is bi-polar with no charts available.

Cvick
PanaceaII '81 C25 #2439 SRSK
Edited by - on
Go to Top of Page

Champipple
Master Marine Consultant

Members Avatar

USA
6855 Posts
Response Posted - 07/15/2004 :  08:16:34  Show Profile  Visit Champipple's Homepage
Here are a set of polars for a Pearson 10 meter for visual reference, note: I am not implying any similarities. I've never seen them for a Catalina 25, but the boat is so prevalent (at least it used to be) that I am sure a set exists. US Sailing used to (and probably still does) keep a polars library of sorts. Print outs (which usually weren't much better than the .gif files below were available for a rather steep price. In most cases, everyone in a fleet would chip in and then copy the heck of of the thing - then pass it along to sailors at other regattas (after the race).

If anyone has a set of Polars for the 25, I would love to get a copy.....








One other thing....make sure the polars are exactly for you boat, or at a minimum the exact set up for your boat. Same rig, keel, outboard config (most likely the polars will be without any motor attached), weight, Sail sizes (including spinaker), possible spin pole size etc.
Edited by - Champipple on 07/15/2004 08:26:09
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Topic Locked
 Printer Friendly
Jump To:
Association Forum © since 1999 Catalina Capri 25s International Association Go To Top Of Page
Powered By: Snitz Forums 2000 Version 3.4.06
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.