Re: [PSUBS-MAILIST] Dive to Turn?

[Ian Roxborough <irox@ix.netcom.com>]

I think this might depend a lot on the sub in question and
it's balance.

I've heard a few people describe there sub turning on the
surface, but not underwater.  The main comment I've heard
people say about there sub was that it listed to the outside
of the curve (like a battleship when it's turning).

If a this "listing like a battleship" was to happen underwater,
giving the rudder a slight off vertical angle, then I think
the force it might cause the sub to assend rather than dive.

If the sub was to list more like a motorcycle (in to the curve
rather than away from it), then the slight off vertical rudder
angle might cause it to dive.

In both cases, I think the effect would not be very noticable.
It might be noticable in hydrobatic submarines like Solo.

Cheers,
  Ian.

On Wed, 4 May 2005 17:07:39 -0500
"Cliff McDonald" <cmcdonald@applikonusa.com> wrote:

> Question: When a sub is turned sharply at speed, using only the rudder, will
> it dive as well?  It seems to me that some roll would be induced by
> centrifugal forces on the heavy part of the sub (lower part) which would
> cause the rudder to be in a non-vertical position and point the sub in a
> turning and diving attitude.  Would this be a problem at speeds of 4-6 knots
> and if so, is it correctable?  Thanks, as always,
> Cliff
> 



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