Study for Sail Area / Displacement Ratio of some cats

[mamo]

[mamo]

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

[mamo]

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

[2Hulls]

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

[mamo]

Dave, maybe you have short mast version
88 m2 mainsail is true.

[mamo]

and I also understood something after studying this table;
why fastcats can't go to join ARC

[terhohalme]

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).

Terho

[Robertcateran]

Good Point Terho,
Where does your proa fit?
Robert

[terhohalme]

I sold him (yes proa is he) to a new proanaut (she).

[BigCat]

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

[Maren]

Originally Posted by terhohalme

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.

[Maren]

Originally Posted by mamo

I take it the numbers in bold are to indicate a fastcat/catana471 performance turning point?

[mamo]

Originally Posted by BigCat

No need to do all that math:

NO NEED THE COMMERCIAL VENDORS ALSO

[mamo]

Originally Posted by Maren

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..

[BigCat]

Originally Posted by mamo

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.