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
 Catalina 25 Specific Forum
 Displacement to length & Sail area to displacement		  New Topic  Topic Locked
 Printer Friendly
Author Previous Topic Topic Next Topic  

77Gypsy
Captain

Member Avatar

USA
356 Posts
Initially Posted - 11/28/2004 :  18:25:09  Show Profile
what is:
Displacement to length ratio
and
Sail area to displacement ratio

is there a magic number to look for that classifies a preformance boat and a sluggish cruiser?
what i mean by magic number is, i know with capsize ratio i can look for a number below 2.0 and i have an idea that the boat will right herself easily.



Steve
78 C25 SR/FK - Gypsy
Edited by - on

Frank Hopper
Past Commodore

Members Avatar

Pitcairn Island
6776 Posts
Response Posted - 11/28/2004 :  18:59:42  Show Profile  Visit Frank Hopper's Homepage
Specifications

Swing Keel 25 Fixed Keel 25 Wing Keel 25 Water Bal. 250
LOA 25'0" 25'0" 25'0" 25'0"
LWL 22'2" 22'2" 22'2" 21'3"
Beam 8'0" 8'0" 8'0" 8'6"
Draftlow 2'8" 4'0" 2' 10" 1'8"
deep 5'0" 5'9"
Bal Lbs 1500 1900 1750 1200
Disp 4150 4550 4400 2400(Dry) 3600 lbs(Wet)
Disp/Length 170 186 180 167
Theoretical Hull Speed 6.31 knots 6.31 knots 6.31 knots 6.17 knots


Dimensions

25 Standard 25 Tall 250 Water Bal.
P 24'8" 27'8" 25'0"
I 29'0" 31'0" 29'0"
J 10'6" 10'6" 9'0"
E 9'7" 9'7" 11'0"


Sail Area 25 Standard 25 Tall 250 Water Bal.
Main Sail Area 118.19 132.57
100% Fore Triangle 152.25 162.75
Total Sail Area (100%) 270.40 295.27 268
110% Genoa 167.48 179.03
155% Genoa 235.99 252.26
Spinnaker (PHRF CALCS) 465.89 498.02 430.65(cruising)
Main + 155% Genoa 354.18 384.83


SA/Disp (swing keel) 16.7 18.3 19.8
SA/Disp (fixed keel) 15.7 17.2
SA/Disp (wing keel) 16.1 17.6

Weight of Sail Cloth, Catalina Sails (25)
Main - 5.5 oz
Jib - 5.5 oz
150% Genoa - 4.6 oz
Spmnaker Radial Head 0.75 oz Panels: Std Rig 12 head, 5.5 horizontal
Tall Rig 12 head, 6 horizontal

Water Tank Capacity = 16 or 21 gallon (25) 5 Gallons (250)
Holding Tank Capacity = 14 or 18 gallon (25)
Fuel Tank Capacity - molded compartment for 6 gallon tank (25). 6 Gallons (250)

Distance from Waterline to Masthead (DWL)- 33.0 ft STD Rig (25)
35.0 ft TALL Rig (25)

Common Ratings PHRF Std 228, Tall 222 (25)
Berths - Sleeps 5 persons (25) 4 persons (250)
Headroom Main Cabin - Std 5'4" PopTopUp 6'6" (25) 6'4" (250)


Comparison of Catalina and Capri Sailboats

Cat-25 Cat-25T Cat 250 Capri 26 Cat-27 Cat-270
LOA 25'0" 25'0" 25'0" 26'2" 26" 10" 27'0"
LWL 22'2" 22'2" 21'3" 22'11" 21'9" 23'9"
BEAM 8'0" 8'0" 8'6" 9'10" 8'10" 9'3"
SAIL AREA 270 sqft 295 sqft 268 sqft 295 sqft 340 sqft 316 sqft
DRAFT 4'0" 4'0" 5'9" 4' 10" 4'0" 5'0"
BALLAST 1900 Ibs 1900 Ibs 1200 lbs 1900 Ibs 2700 Ibs 1840 Ibs
DISPLACEMT 4550 Ibs 4550 Ibs 3600 lbs 5250 Ibs 6850 Ibs 6240 Ibs
P 24'8" 27'8" 25'0" 27'6" 28'8" 28'2"
I 29'0'' 31'0" 29'0" 32'9" 34'6" 33'4"
J (foredeck) 10'6" 10'6" 9'0" 8'7" 11'3" 9'3"
E (main foot) 9'7'' 9'7" 11'0 11'0" 10'6" 11'6"

SA/LWL 12.18 13.31 12.61 12.87 15.63 13.31
SA/Disp 15.7 17.2 19.8

Theoretical 6.31 6.31 6.17 6.41 6.25 6.53
HullSpeed(THS)knots
@ 1.34 x sq root of LWL

Theoretical 7.06 7.06 6.91 7.18 6.99 7.31
HullSpeed(THS)knots
@ 1.50x so root of LWL
Send comments or questions to: Bill Holcomb
Back to National Association Home Page

Edited by - on
Go to Top of Page

aeckhart
Master Marine Consultant

Members Avatar

USA
1709 Posts
Response Posted - 11/28/2004 :  19:21:13  Show Profile  Visit aeckhart's Homepage
Hey Frank,

You keep this info on a little sheet of paper in your wallet?

I doubt that Catalina knows all this.

Al
GALLIVANT #5801
Edited by - on
Go to Top of Page

Dave Laux
Captain

Members Avatar

318 Posts
Response Posted - 11/28/2004 :  19:35:22  Show Profile
Both of the numbers you are looking at are in many ways obsolete. Modern construction and sail control have rendered both of them meaningless. As regards a Cat 25 remember designed displacement is wildly diferent from actual displaement or the weight of the boat. In any case D/L is Displacement (in tons of 2240 lbs.) divided by (Length times .01)cubed. and SA/D is sail area in sq. ft. divided by Displacement (in 2240 lb tons) to the 2/3 power.
so for a Catalina 25
D/L is 5000/2240 or 2.23 divided by .01 times 25 to the third power or .0156 = 143
SA/D is 270 (standard rig) divided by 5000/2240 to 2/3 power = 158
Edited by - on
Go to Top of Page

Frank Hopper
Past Commodore

Members Avatar

Pitcairn Island
6776 Posts
Response Posted - 11/28/2004 :  22:27:12  Show Profile  Visit Frank Hopper's Homepage
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by aeckhart</i>
<br />Hey Frank,

You keep this info on a little sheet of paper in your wallet?

I doubt that Catalina knows all this.

Al
GALLIVANT #5801
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
Note that Bill Holcomb's name is at the bottom, I stole it.
Edited by - on
Go to Top of Page

Steve Milby
Past Commodore

Members Avatar

USA
5932 Posts
Response Posted - 11/29/2004 :  09:13:29  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">is there a magic number to look for that classifies a preformance boat and a sluggish cruiser?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote"> If you want to know whether a particular boat is a good overall performer or a slug, the best number to look at is it's PHRF rating. Racing ratings tell you how the boat actually performs in comparison with other boats. The ratings "assume" that all the rated boats are being sailed by skippers & crews of average skills. The ratings aren't exact, however. Some boats are easy to sail above their ratings, and others are not. Nevertheless, the PHRF number is a good guide.
Edited by - on
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.