T&T: Anchor,chain,rope specs and use

[Parvey]

Sorry, I'm not following you. By definition the projected area is the cross
sectional area perpendicular to the wind. Anyway, if you are at anchor, the
boat should head up in to the wind, no?

Regards,

--Jim


-----Original Message-----
From: tands [mailto:tands@gravefamily.org] 
Sent: Friday, April 20, 2007 6:21 PM
To: Parvey; 'Robin'; trawlers-and-trawlering@lists.samurai.com
Subject: Re: T&T: Anchor,chain,rope specs and use


> You don't need the surface area (which is extremely difficult to 
> calculate, you need the projected area. You only need to estimate 
> the area within the outline of the boat. This can be made up of 
> simplified geometric shapes
> (rectangle and triangles mostly for a boat). Take a look at your 
> boat, bow head on. On my trawler it would be best represented by a 
> small rectangle
> (house) sitting a larger rectangle (hull). If this isn't clear I 
> could e-mail a sketch off list.

Just don't assume this projected shape is perpendicular to the direction of
the wind. You still need a shape factor.

Ted G
DeFever 44, Amici