|
|
|
|
|||||
|
||||||
From: (no name) (no email)
Date: Tue May 22 2007 - 21:04:32 EDT
In a message dated 5/22/07 2:47:03 PM, writes:
> So I'd say that 90% of the full displacement trawlers out there are over
> powered. Most boats with masts and white things hung from them are seldom
> powered as our trawlers are. Yet they will all do hull speed or better with
> smaller engines carrying the same weight and volume......hmmmmm did the NA's
> sell us out on efficiency or am I missing something here?
>
Sailboats are designed to minimize both frictional and form resistance. Sleek
hulls, slack bilges, transoms designed not to make waves. The weight in a
sailboat is concentrated largely in the keel where it presents little drag. So if
you compared equal displacement trawlers and sailboats you would find that
the sailboat has less cross sectional area and moves through the water easier.
Hence it takes less power to move a sailboat at hull speed. The NAs havn't sold
us out. The 1 hp. per 500 lbs. displacement is an average figure. YMMV.
Larry Z
**************************************
See what's free at
http://www.aol.com.
_______________________________________________
http://lists.samurai.com/mailman/listinfo/trawlers-and-trawlering
To unsubscribe send email to
with the word
UNSUBSCRIBE and nothing else in the subject or body of the message.
Trawlers & Trawlering and T&T are trademarks of Water World
Productions. Unauthorized use is prohibited.
|