[PUP] PPM-*Stability*

[Truelove39 at aol.com]

Tad - What you wrote describes our boat almost to a T.
 
The Sailboat Database was created by John Holtrop back in the  90s. John did 
a lot of work using fuzzy logic and made comparisons  easy. Two of the 
criteria shown in a spreadsheet here 
_http://www.johnsboatstuff.com/Articles/fuzzy.htm_ (http://www.johnsboatstuff.com/Articles/fuzzy.htm)  are  "capsize" and roll 
acceleration," and bear on this discussion. Read the readme  first.
 
 If you look up our boat, "Skookum 53" you will find that despite the  lack 
of a ballast figure included in the displacement and ballast column she has  
very respectable numbers. Add 20,000 lbs of lead and she becomes almost  
un-rollable, or so we would hope. The tradeoff of course is that she is very  stiff, 
with a roll period under 5 seconds without the birds in the water. Of  course 
we lack the top hamper which would have made for a more reasonable roll  
period. These Monk ketch-rigged trollers were designed for the PNW fishery  and 
most are still fishing thirty years later. 
 
BTW, are you the Tad who has posted to Boat Design Net and has done a lot  of 
work with paravanes? If so, I'd like to ask a question or two off-list.
 
Regards,
 
John
"Seahorse"

> To meet this standard your "Perfect Passagemaker"
will  have to look a great deal like Windhorse.  That is, have relatively
high  freeboard full length, relatively narrow beam, a very small deckhouse
above  main deck level, and probably no double decking at all.  
**************Plan your next getaway with AOL Travel.  Check out Today's Hot 
5 Travel Deals! 
(http://pr.atwola.com/promoclk/100000075x1212416248x1200771803/aol?redir=http://travel.aol.com/discount-travel?ncid=emlcntustrav00000001)