Welcome to Space Future. This site is for everyone who wants to go to space.

Learn about Space Tourism, see some of the proposed Space Vehicles, find out about the legal, medical, and environmental aspects of our Space Habitat, or discover the potential of Space Power.

Visit the Archive of papers and publications or browse the Space Future Journal for current news and features.

About Space Future About

There are currently 222 documents in the archive.

Bibliography Archives List Library Listing

Radio interviews with Space Future's founders and correspondents:

  • Gary Hudson
Origin:4th ISCOPS, AAS Vol 77, pp 349-351

Since the first proposals for single-stage-to-orbit (SSTO) launch vehicles in the late 1940s, the chief criticism of the concept has remained the need for high mass fractions (ratio of propellant weight to loaded weight less payload) required for the concepts to be practical. Whether reusable or expendable, in many critics' minds the impossibility of SSTO remains tied to this issue. The purpose of this analysis is to dispel the concern over the issue of mass fraction. We propose to do this by means of a thought experiment.

  • Saturn Data Summary Handbook
  • Space Shuttle External Tank System Definition Handbook, Volume 1, Configuration & Operation
  • The Saturn S-IVB as a Test-Bed for Booster Recovery
Referred to by:
Related Entries:
Please send comments, critiques and queries to feedback@spacefuture.com.
All material copyright Space Future Consulting except as noted.