Sender: "Marvin Kaye" <marv@lancaironline.net>
To: lml@lancaironline.net
Date: Fri, 03 Dec 2004 08:46:18 -0500
Message-ID: <redirect-554697@logan.com>
Received-SPF: pass
 receiver=logan.com; client-ip=209.86.89.67; envelope-from=liegner@earthlink.net
Mime-Version: 1.0
From: Jeffrey Liegner <liegner@earthlink.net>
Subject: Cabin Pressurization in SpaceShipOne
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

The Lancair IVPs have a  5 PSI cabin differential.  Airlines have 8 
PSI differentials.  SpaceShipOne is way up there in altitude, nearly 
zero atmospheric.  Yet he wasn't wearing a pressure suit during the 
flight.  Inside an astronaut EVA suit, there's ~10.5 PSI (versus our 
14.5 PSI on terra firma).

So, what is the cabin pressure differential inside SpaceShipOne?

And how does it get this...bleed air of the engines...doubtful?  And 
how does it control it, so you don't get the full magilla at 50,000' 
and overpressurize your brains during the initial stage?

And where's he get pressurization at 50,000' prior to release, before 
the engines fire, when he's hanging under the White Knight?

And what happens when the rocket quits...when you need the 
pressurization most?  Still climbing...and then during descent.  And 
no space suit in case things leak.

How does he do that?  Haven't heard a single thing about it.

Jeff L