Re: [PSUBS-MAILIST] Hydrogen Peroxide: on to the topic of flywheels

["samdatl" <samdatl@avana.net>]

Have seen the HPS you speak of with the counter rotating screws. Always
thought that counter rotating dual screws would work best shrouded and with
coupled variable pitch. using a step up effect.
----- Original Message -----
From: <VBra676539@aol.com>
To: <personal_submersibles@psubs.org>
Sent: Thursday, July 27, 2000 4:19 AM
Subject: Re: [PSUBS-MAILIST] Hydrogen Peroxide: on to the topic of flywheels


>
> In a message dated 7/27/00 4:45:56 AM, wacarson@interchange.ubc.ca writes:
>
> << BTW do you know what kind of efficiency you might gain from a counter
> rotating prop  (aside from balancing the angular momentum)?  We are
> considering the idea for next year.
> Also BTW, and speaking of the Guiness book and alternate drives, the Uni
of
> California in San Diego broke the world record for alternate propulsion by
> over half a knot with their mammal-like tail drive.  Congratulations to
> them.  It is quite an amazing sub.
>
> W >>
>
> Wade, I don't know the numbers, but the Naval Academy boys ran a very tidy
> little HPS with twin bladed counter rotating props about a yard across and
> stomped the competition into a mud hole. I'll bet some budding Admiral
used
> it for a dissertation, in which case, it's probably on the web somewhere.
> Vance