Re: [PSUBS-MAILIST] Re:

["Dale" <heinzind@cadvision.com>]

-----Original Message-----
From: Carl Kem <dustyut@lasal.net>
To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
Date: Wednesday, February 28, 2001 10:00 AM
Subject: [PSUBS-MAILIST] Re:


>Dale, excellent query!  While the principle is similar to aerodynamics,
>hydrodynamics is indeed a bit different with a twist.  The twist is
>while you really cannot compress the water with the airfoil design, keep
>in mind that you are acting against a liquid object.  Water has more
>mass than air does.  So when you use the airfoil, you are not
>compressing it as much as you are directing it.  You may be able to
>direct it in a ditch or canal, but in a lake or ocean, you are directing
>yourself.  You are moving, and you are by far smaller than the ocean
>itself.  Therefore when you direct the water with the rudder/plane
>you're telling the water, "Hey, I wanna go over here!".
>Carl
>
>
So it would not realy matter about the airfoil design much at all .. It
would be more important to make it streamlined, to reduce drag.  Is that
right??
dale.