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To: Christina_Young@wa*.me*.co*
Subject: Poseidon Jetstreams (Odins) - Comment
From: Ralph Landry <rrl@nr*.go*>
Cc: JOHNCREA@de*.co*
Cc: rrl@nr*.go*
Cc: techdiver@opal.com
Date: Fri, 3 Feb 95 13:19:51 EST

Some comments regarding Poseidon first stage "boost" to the R port and
engineering "viewpoint" ...

Poseidon literature circa 1991-2 refers to a venturi in the high pressure
to intermediate pressure/reservoir.  That can be used to accelerate flow.
However, a venturi, orifice, converging/diverging nozzle can only change
the flow velocity.  This can alter the downstream pressure, but the effect
should not be significant with a pressure drop and line resistance that
would occur in a regulator.  Since the intermediate reservoir is the same
volume the mass of air transfered should remain constant, or very close
to constant.

The Poseidon repair manual that I have, dated three years ago, gives the
same part numbers for the first stages and internals for both the Odin/
Jetstream and Cyklon/Oceanair.  The tuning data are also the same. So, I
really don't see where there is any difference in using an Odin or Cyklon
second stage.  There is a model that uses a different first stage with the
Cyklon second stage, but that is an older system.

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