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- Newsgroups: sci.space
- Path: sparky!uunet!usc!news.cerf.net!netlabs!lwall
- From: lwall@netlabs.com (Larry Wall)
- Subject: Re: Making Orbit 93 - The Delta Clipper Program
- Message-ID: <1993Jan21.204731.17316@netlabs.com>
- Sender: news@netlabs.com
- Nntp-Posting-Host: scalpel.netlabs.com
- Organization: NetLabs, Inc.
- References: <19862@mindlink.bc.ca>
- Date: Thu, 21 Jan 1993 20:47:31 GMT
- Lines: 27
-
- In article <19862@mindlink.bc.ca> Bruce_Dunn@mindlink.bc.ca (Bruce Dunn) writes:
- : The vehicle enters nose first. The re-entry aerodynamics of the vehicle are
- : derived from the very large body of data which is available on missile
- : warhead re-entry aerodynamics. The angle of attack of the vehicle is
- : controlled to minimize thermal loading. The vehicle has a 1200 to 1500
- : nautical mile cross range. Deacceleration is 1.1 g maximum during descent.
- : On descent, the vehicle goes subsonic at 60,000 feet altitude, and the
- : engines are then started and idled. At 5000 to 10,000 feet altitude, the
- : vehicle is rotated base down.
-
- How do they guarantee they don't get upside-down-spraycan syndrome?
-
- Not only are they going to have to pump hydrogen and oxygen from the
- FAR ends of the tanks, but they have to make sure they don't get
- bubbles in the line while rotating, and you can't do that if the tank
- is less than half full without having inlets on the sides of the tank,
- as well as top and bottom. (Controlling slosh during rotation is no
- picnic either.) Anybody know how they plan to do it? For instance,
- with lots of smart inlet valves that know when to keep their mouths
- shut? Or maybe the engines are robust enough not to care about "burps"
- when idling?
-
- I suppose you could just pressurize above the triple points of H2 and O2,
- and then you don't have to worry about it... :-)
-
- Larry Wall
- lwall@netlabs.com
-