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 Catalina 25 Specific Forum
 Max. Hull Speed		  New Topic  Topic Locked
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n/a
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62 Posts
Initially Posted - 05/14/2002 :  12:57:59  Show Profile
What's the max. hull speed on a C-25 (wk)?
Thanks!
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Steve Milby
Past Commodore

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USA
5909 Posts
Response Posted - 05/14/2002 :  13:28:49  Show Profile
Kathleen,

Bill Holcomb lists the theoretical hull speed as 6.31 kts. in an article in "Tech Tips." Actual speed can exceed that number under the right circumstances, but anytime you can hold a C-25 at around 6 kts under sail, you're moving right along.

Steve Milby "Captiva Wind" C-25 T/FK #2554
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 05/14/2002 :  13:39:27  Show Profile  Visit Douglas's Homepage
I see you finaly got your first post in response to the hull speed question. Im surprised they didn't come sooner. We all love to strech the truth about how fast our boats are. Here is a site you can go to and it will give you the aprox. speed for any hull length and a few links about hulls. try this www.anyboat.com/hull.htm
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n/a
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62 Posts
Response Posted - 05/14/2002 :  16:02:18  Show Profile
Thanks, guys! I've been reading up on sail trim and wind theory with the idea of attaining the "groove". It helps that I just got a new speed log so I can see how fast I'm going, or not, and make all kinds of adjustments.
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Derek Crawford
Master Marine Consultant

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USA
3323 Posts
Response Posted - 05/14/2002 :  16:55:59  Show Profile
Kathleen - remember that theoretical hull speed only applies when you are going to weather. Off the wind in a stiff breeze you can exceed it with relative ease. (I once had a C22 over 10 knots on a beam reach - and the speed was checked with 2 knotmeters!)
Derek on "This Side Up"
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 05/14/2002 :  20:51:15  Show Profile  Visit Douglas's Homepage
See I told you !!!!!
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Derek Crawford
Master Marine Consultant

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USA
3323 Posts
Response Posted - 05/14/2002 :  22:43:30  Show Profile
Douglas - I'd swear to that 10 knots in a court of law - and bring the skipper of the O'Day who was to lee of me! He had the other knotmeter...which had been calibrated that week.
Derek
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Bristle
Admiral

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USA
834 Posts
Response Posted - 05/14/2002 :  23:56:31  Show Profile
Getting beyond hull speed only requires enough power (including the force of gravity when surfing on a wave) to lift the boat far enough out of the water to overcome the bow wave. If the boat won't lift as you try to exceed hull speed, the harder you push it, the harder the bow wave will push back. A C-22 has a better chance of getting up on plane than a C-25 because of the hull form--broader and flatter toward the stern. But the 25 can surf a little--we did 7.8 downwind under bare poles during our 100 mile delivery trip after buying Passage. The most remarkable thing there is that I'm still married! <img src=icon_smile_blush.gif border=0 align=middle>

Dave Bristle, 1985 C-25 SR-FK #5032 "Passage" in CT
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aeckhart
Master Marine Consultant

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1709 Posts
Response Posted - 05/15/2002 :  10:19:34  Show Profile  Visit aeckhart's Homepage
Bristle - The best hour of sailing I ever had was on a spinnaker run with 15+ MPH winds. We were reached 11.5 with 3-4 foot waves. A real rush to say the least. My C25T is a wing keel so she is much faster off wind.

Al Eckhart
Gallivant #5801
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Douglas
Master Marine Consultant

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1595 Posts
Response Posted - 05/15/2002 :  12:52:32  Show Profile  Visit Douglas's Homepage
Not so secretly Im sitting here reading these posts about boat speed. I could jab you guys a little more but have you ever heard the saying the first liar doesn't stand a chance. Just having some fun with you all. Once I shot through Deception pass on a full 9knt max ebb. At full throttle and all sails up I was just able to tow three water skiers. LOLPMP
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Bristle
Admiral

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USA
834 Posts
Response Posted - 05/15/2002 :  13:33:00  Show Profile
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Once I shot through Deception pass on a full 9knt max ebb. At full throttle and all sails up I was just able to tow three water skiers. <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>
They must have been skiing on styrofoam blocks--they're moving 9 kts slower through the water than you are over the bottom... <img src=icon_smile_wink.gif border=0 align=middle>

Dave Bristle, 1985 C-25 SR-FK #5032 "Passage" in CT
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John Mason
Admiral

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USA
687 Posts
Response Posted - 05/15/2002 :  14:06:29  Show Profile
Doug,
I was on that <i>SAME</i> max ebb, but my boat was slowed down when all the seagulls decided to hitch a ride 'cause I was going faster than they were!<img src=icon_smile_wink.gif border=0 align=middle>

John Mason - Ali Paroosa
1982 - FK/SR #3290
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Bristle
Admiral

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USA
834 Posts
Response Posted - 05/15/2002 :  16:55:09  Show Profile
Hey, c'mon guys--you don't get credit for how fast the water's going! <img src=icon_smile_angry.gif border=0 align=middle>

Dave Bristle, 1985 C-25 SR-FK #5032 "Passage" in CT
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gnorgan
Admiral

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USA
563 Posts
Response Posted - 05/25/2002 :  01:50:54  Show Profile
I'm right here with you Al on the speed of our Tall/Wing boats. They ARE faster!!!<img src=icon_smile_wink.gif border=0 align=middle> Maybe we need to mount an America's Cup challenge....
I think I'm going to haul my C25 and start polishing the hull tomorrow<img src=icon_smile_big.gif border=0 align=middle>

C25 tall/wing
Classical Cat #5944
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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.