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post #4783 of Old 09-07-2013 Thread Starter
PCP
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Re: Interesting Sailboats

Quote:
Originally Posted by HMoll View Post
Can we start a "not complicated" short discussion of using B/D as an indicator of stability, to get THAT out of the way once and for all as well?
B/D is only an indicator if a boat has the same draft, the same kind of keel and the same hull form stability (same type of hull with a similar beam). That was generically the case with the new Oceanis 38 if compared for instance with a Pogo 10.50, even if the Pogo is even beamier considering that it is a smaller boat. However the Pogo has not only more draft but a considerably bigger B/D ratio and therefore is a more stiff boat. On these boats with huge form stability that will be more noticeably on the conditions I have referred.

Quote:
Originally Posted by PCP View Post
Humm, Oceanis are on the low end of ballast ratio. As I said, with a bigger rig, a boat that would be fast in all conditions except upwind with weather where the ballast ratio is fundamental to give power to the boat to go against waves, specially a fat one like the new 38.

..

Back on this thread that subject was discussed at length as well has the importance of draft and type of keel, hull form stability to give a proper meaning to the B/D ratio.


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