Re: [PSUBS-MAILIST] Re: high speed subs

["Marsee Skidmore" <heyred@email.msn.com>]

Vance,

My old dusty books describe squat (aka "settle butt") as a surface
disturbance phenomenon. You're saying this occurs in mid-water, so that's no
help. Does it become any less pronounced with depth? Please tell me more
about the velocity relationship. Your butt settles as you start from a dead
stop? And settles more the faster you go?

Joe

----- Original Message -----
From: <VBra676539@aol.com>
To: <personal_submersibles@psubs.org>
Sent: Friday, February 25, 2000 9:21 PM
Subject: Re: [PSUBS-MAILIST] Re: high speed subs


>
> In a message dated 2/26/00 5:37:43 AM, vulcania@interpac.net writes:
>
> << Anyway, it seems like a possible cause of the problem you're
>
> describing.  Just thought I'd run it past you.
>
>
> Gotta go,
>
>
> Regan >>
>
> No, that's the wrong direction to head in. The attitude change is forced
on
> the boat(s) by the prop thrust. I assume some of it is due to side wash,
> especially on the big (36 X 36) wheel that we used at Perry; every stern
> driven vehicle I ever piloted suffered to some extent with the problem.
> Little Aquarius, with a 14" kort nozzle did it, right up to the big PCs
which
> were over 30 feet long. The drag and flow problems wouldn't kick in until
> things were moving. Mind you, a certain co-op engineer who no longer
speaks
> to me on the net did some tests on this K of mine many moons ago, and
wasn't
> any too thrilled with its characteristics as I recall.
>
> Don't you have this problem to some degree with the skinny hindquarters of
> your N?
>
> Vance
>