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Old 24-04-2008, 06:45   #1
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Study for Sail Area / Displacement Ratio of some cats

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Old 24-04-2008, 06:47   #2
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This is my study on Sail Area / Displacement ratio of some cats which I think to buy..I can add more parameters or cats if you wish and please correct me if I have any mistake on this table.. I am waiting your comments
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Old 24-04-2008, 07:13   #3
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These are my opinions;

- Logoon look heavy and slow than the others

- 420 hybrid is like a joke, standingbull

- Mahe looks good performer at the first sight but slow down dramatically with loading

- most important up to me; Catanas catch the myth of Fastcat by loading

- and lavezzi 40 looks good almost as much as catanas and fastcat

- my favorite is catana 431 and 471
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Old 24-04-2008, 07:35   #4
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mamo - a correction on the 471 stats - main is ~80m2.

And don't believe that weight. Don't believe the weights from any cat manufacturer.

Dave
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Old 24-04-2008, 07:44   #5
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Dave, maybe you have short mast version
88 m2 mainsail is true.
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Old 24-04-2008, 07:50   #6
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and I also understood something after studying this table;
why fastcats can't go to join ARC
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Old 24-04-2008, 09:16   #7
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Mamo,

Good work, but you should use this formula for sail area displacement ratio:

SDR = SA/D^0.667

Then the ratios are comparable to values in literature. Displacement is cubic and sail area is squared, this is why the exponent should be 2/3 (= 0.667).

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Old 24-04-2008, 23:27   #8
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Good Point Terho,
Where does your proa fit?
Robert
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Old 25-04-2008, 06:16   #9
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I sold him (yes proa is he) to a new proanaut (she).
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Old 26-04-2008, 16:50   #10
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Sail area displacement calculator

No need to do all that math: This online calculator will do it for you. Of course, to believe the result you have to believe the displacement figure..........

SA / D Ratio
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Old 26-04-2008, 17:59   #11
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Quote:
Originally Posted by terhohalme View Post
I sold him (yes proa is he) to a new proanaut (she).

OOOh. Lucky she is. The force is strong with her

Sorry I was just having a hard time understanding your sentence. It looked like Yoda-speak.
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Old 26-04-2008, 18:02   #12
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I take it the numbers in bold are to indicate a fastcat/catana471 performance turning point?
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Old 26-04-2008, 18:05   #13
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No need to do all that math:
NO NEED THE COMMERCIAL VENDORS ALSO
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Old 26-04-2008, 18:08   #14
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I take it the numbers in bold are to indicate a fastcat/catana471 performance turning point?
YESS.. PERFORMANS COMES TO SAME POİNT BY PAYLOAD.. BUT I PREPARE NEW AND MORE DETAILED TABLE..I LL SEND IT SOON..
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Old 26-04-2008, 18:23   #15
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Question NO NEED THE COMMERCIAL VENDORS ALSO?

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NO NEED THE COMMERCIAL VENDORS ALSO
I think I have just been complained about, but I'm not sure-are you objecting to my posting a useful link to a third party's website? If so, why?

If it is terhohalme's remarks that irked you, he is quite right, you know-that is how yacht designers do it.

And Maren, I'd say that terhohalme's English is much, much better than our Finnish-way better than mine, anyway.
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