Re: [Paddlewise] Rudders/ frequency

From: John Winters <735769_at_ican.net>
Date: Sat, 28 Mar 1998 18:49:41 -0500
Jerry wrote;

>The primary purpose of a rudder is as an ENERGY SAVING DEVICE.  It is not
to
>help handling or turning, etc.  I have had both ruddered and unruddered
>boats.  If you are traveling long distance in windy, choppy conditions a
>rudder saves energy.  No matter how skilled you are.


This may be the case in boats that are difficult to control and have strong
weathercocking tendencies. It is not the case in those boats that track
well without need for a rudder. In fact, tank testing has shown that
rudders add a much a ten percent to overall drag.  While this high figure
maybe due to the rather poor design of most rudders it still is an
indication of the  cons of a rudder.

I think it is important to understand that not all boats weathercock badly
or lack controllability and that not all boats require special skills to
keep them on course. One must not assume that, because most of the boats
one has paddled lack controllability that all boats lack controllability.

Cheers,
John Winters
Redwing Designs
Specialists in Human Powered Watercraft
http://home.ican.net/~735769/



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Received on Sat Mar 28 1998 - 16:03:26 PST

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