Re: [PSUBS-MAILIST] Underwater pod on surface vessel.

["Captain Nemo" <vulcania@interpac.net>]

----- Original Message -----
From: "Lew Clayman" <lew_clayman@yahoo.com>
To: <personal_submersibles@psubs.org>
Sent: Friday, July 13, 2001 3:24 PM
Subject: [PSUBS-MAILIST] Underwater pod on surface vessel/ was NEW LOGO
STINKS!!!


> Surface vessels are limited in speed by a surface effect, perhaps
unfamiliar to psubbers as it
> does not apply underwater

An effect I once heard a British friend refer to as "running with a bone in
her teeth" (describing the bow wave).   In the first half of the 20th
century, military submarines had naviform bows, and suffered from this
phenomenon when running on the surface.  That changed with the arrival of
streamlined "teardrop shaped" hulls (ALBACORE, SKIPJACK, and successors).

 surface waves plowed up by the bow cause a bow-up pitch once the boat
> exceeds "hull speed" which is generally quoted as 1.34 x waterline length
in feet = hull speed in
> kts.

For the general information of all, howsabout providing an example of this
formula in use based on an arbitrary hull length of your choice, to
demonstrate how works?

Pat