Re: "NASA Ends Project Intended to Replace Shuttle"

From: Spike Jones (
Date: Mon Mar 12 2001 - 23:30:57 MST

Michael Lorrey wrote:

> c) scramjet/rocket chem or nuke insertion stage into orbit.
> What is the mass fraction a vehicle would need if it was already
> travelling 1000 mph at 15,000 on a 30 degree trajectory, from the
> equator?

Ill look for my spreadsheet I wrote on this about 8 yrs ago.
The 1000 mph and 15000 ft help less than I would have
expected, so it was disappointing. As I recall, it reduced
fuel needs by around 15%. Doug, do you have an active
spreadsheet for this? spike

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