List: trawlers@lists.trawlering.com
From: scaramouche@tvo.org
Re(2): TWL: Ideals and Compromises
Sat, Dec 22, 2001 4:14 PM
Richter-Pooh@rocketmail.com writes:
>In the roll
>axis, the mast may well contribute more to the moment
>of inertia of a sailboat than the rest of the boat
>combined. Lose the mast, and the roll moment of
>inertia gets much smaller, like shortening a pendulum.
> Thus the roll period gets shorter, for a quick, jerky
>, uncomfortable roll.
Excellent explanation Mark. A few years ago, I unstepped my mast (35
ft tall on a 27 ft sailboat) to see how she would behave as a wannabe
trawler (to explore some of Ontario and New York's beautiful canals).
There was some moderate chop and a wee bit of wind out on the big
lake. Would have been a pleasant sail with some splishing and
splashing against the hull. But without the mast, it became instantly
uncomfortable very uncomfortable.
The stick went back up the very next day!!!
George, wintering in Frenchman's Bay, Lake Ontario
P.s: Scaramouche is a 6 ton boat with a hollow modified (Brewer-bite)
full keel, 4.5 ft deep and lead-filled .