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 crazy keel question		  New Topic  Topic Locked
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pwhallon
Admiral

Member Avatar

USA
694 Posts
Initially Posted - 11/04/2002 :  13:59:30  Show Profile
hi gang,

I need to know the measurement from the bottom of the keel to the bottom of the hull on a fin keel model. Not to the keel stub, but to the bottom of the boat.

If the waterline draft is 4 feet, wouldn't the depth from the bottom of the boat to the bottom of the keel be something less than 4 feet?

Here is a picture, from the photo section of the forum, showing the dimention I'm looking for. I downloaded it and added the white lines in Corel.

I hope Tweety's owner doesn't mind me using his picture. It's a very good keel shot.

<img src="http://im1.shutterfly.com/procserv/47b2cf25b3127cce91e4501e1b3c0000001410" border=0>

Tweety is a cool looking boat.

Thanks,

Paul
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MattL
Admiral

Members Avatar

USA
990 Posts
Response Posted - 11/04/2002 :  15:01:02  Show Profile
Paul,
Set up a simple ratio problem Your height on photo is to the keel in photo as your actual height is to actual keel

Example say you are 6 feet even in the photo you are (OK I have a metric ruler here, but units will cancel out) 4.7 cm the keel is 1.8 cm

6 is to X
as
4.7 is to 1.8

6 * 1.8 = 10.8

10.8 / 4.7 = 2.3 about 2' 4"

That sound about right?


Matt/Brigitte Loeffler
E.C. Rider
Cat 25 86'
FK/SR _/)
[http://im1.shutterfly.com/procserv/47b2dc07b3127cce9c9d8c699bc90000005410]
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jm
Captain

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Canada
290 Posts
Response Posted - 11/04/2002 :  15:18:32  Show Profile
Paul, if you can wait until tomorrow morning, I'll have a direct measurement for you. My boat is on-the-hard - I'll just go down and measure it (bottom of the keel to the hull).

Watch for it tomorrow am, unless someone else posts a direct measurement prior to this. (not to discount your proportion/ratio calculation Matt ! ! )
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Champipple
Master Marine Consultant

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USA
6855 Posts
Response Posted - 11/04/2002 :  15:49:07  Show Profile  Visit Champipple's Homepage
I was going to tell him to do the same thing based on LOA of the boat in the photo....

Duane Wolff
"The Flying Wasp"
C-25, #401 std,sk
Chief Measurer C-25/250 National Assn.
<img src="http://im1.shutterfly.com/procserv/47b2d603b3127cce9f858f0ef3ef0000001010" border=0>
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OJ
Master Marine Consultant

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USA
4382 Posts
Response Posted - 11/04/2002 :  19:49:50  Show Profile
<BLOCKQUOTE id=quote><font size=1 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
Tweety is a cool looking boat.
<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Looks like a clip from a new PBS series called <u>This Old Boat</u>

The guy is saying "how many of you have encountered the Catalina smile? Well today we're explore the causes and remedies of this . . . "
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jm
Captain

Members Avatar

Canada
290 Posts
Response Posted - 11/05/2002 :  08:57:01  Show Profile
The answer is

33"
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pwhallon
Admiral

Members Avatar

USA
694 Posts
Response Posted - 11/05/2002 :  10:07:34  Show Profile
Thanks guys,

Jm, I appreciate you taking the time to do a direct measurement for me.

My Algebra stinks.

I have a Catalina 250 wing keel trailer. The bunks are a lot higher up than on my old C-25 wing keel trailer.

I'm trying to figure out how much adjustment will be needed if I get a fin keel boat.

This helps a lot.

Thanks to all of you.<img src=icon_smile.gif border=0 align=middle>

Paul
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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.