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- Newsgroups: sci.space
- Path: sparky!uunet!munnari.oz.au!bunyip.cc.uq.oz.au!newton.physics.uq.oz.au!smithc
- From: scooper@kepler.physics.uq.oz.au (Steven Cooper)
- Subject: What is DC ??
- Message-ID: <BzC0s3.E60@bunyip.cc.uq.oz.au>
- Sender: smithc@newton.physics.uq.oz.au (Craig Smith)
- Organization: Physics Dept. The University of Queensland
- Date: Wed, 16 Dec 1992 03:09:38 GMT
- Lines: 22
-
-
- Pardon my ignorance folks, but what is this DC thing?
-
- I get the idea that it's a single stage to orbit vehicle which lands vertically
- under power. Is this true?
- Who is designing/building it?
- From other posts I gather some initial tests will happen next year.
-
- Now, I'm really confused about how you make an SSTO. As far as my meagre
- understanding goes, the final velocity of a rocket is the exhaust velocity
- times the logarithm of the mass ratio. How easy is it to get 5 miles per second
- with a single stage? I thought that exhaust velocities were only about 3000 m/s
- which would require a mass ratio of about 14. With payload and fuel for landing
- this sounds quite difficult.
-
- I'd be grateful for any information.
-
- Thanks in advance,
-
- Steven Cooper ( c/- C.Smith's account)
-
- scooper@kepler.physics.uq.oz.au
-