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Re: Typhoon

-----Original Message-----
From: Michael B Holt <michaelbholt@juno.com>
To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
Date: Tuesday, July 06, 1999 11:26 AM
Subject: Re: Typhoon


    ***snip***

>That's a big part of it, but the sail shape does change flow over
>the rudders and screws at higher speeds.   Shape the sail wrong
>and the controls can reverse at some speeds.



    I *think* I've seen pics of some foreign (non-US) subs
whose tailplanes were "cruciform" (an "X") instead of a
"cross" when viewed from the rear.  Is this why?  To
avoid turbulence caused by the sail/conning tower?