GL: Appropriate trawler for Caribbean cruising

[Bob DeGroot, DCH]

The depth and length of the keel does make a difference, especially for
round bottom full displacement boats. However, most "trawlers," even
semi-displacement ones have a long deep prop protecting keel. For example,
our DeFever 44+5 has a deep long keel and doesn't experience the yawing you
describe.

What you describe would be more common with "power boats" with little or no
keel and with tiny rudders. They have nothing to counteract the power of the
traction from the deeper prop. And it doesn't even take this to cause a
white knuckle ride with these type boats. Just take a little sea off the
quarter and yeeeeeee hawww it's driving with prop time.

Bob DeGroot, D.C.H.
M/V Spirit Dancer
DeFever 49 CPMY


-----Original Message-----
From: great-loop-bounces at lists.samurai.com
[mailto:great-loop-bounces at lists.samurai.com] On Behalf Of joe
Sent: Friday, February 20, 2009 1:36 PM
To: 'jonathan olenick'; wehlen at yahoo.com
Cc: 'great loop list'
Subject: Re: GL: Appropriate trawler for Caribbean cruising

I can personally confirm that the below described yawing does not occur on
my twin engine N-37 Great Harbour. 

"Carolyn Ann" N-37

joe 


snip "...Subject: Re: GL: Appropriate trawler for Caribbean cruising

I have heard ( but not confirmed) that when a twin screw vessel rolls, the
deeper prop has a bite on denser water , and hense more thrust, thus causing
yawing in conjunction with the roll. Also single screw with long deep keel
and
large rudder tends not to yaw, flip side, it does not make sharp turns. Jon
on..."
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