+ 1970 News Releases (7.6 Mb PDF file) - NASA

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MSC 70-67
Recently_ the National Aeronautics and Space A_ninistration
selected the McDonnell Douglas Corp._ St. Louis_ and the North American
Rockwell Corp., Space Division_ Downey_ Calif._ for final negotiations
of parallel ll-month Phase B (definition and preliminary design) contracts
for studies of the most promising approach to the space shuttle--the fully
reusable two-stage vehicle.
The Grumman/Boeing and Lockheed studies will rigorously reexamine the
feasibility of shuttle concepts that might be competitive--technically
and economically--with the two stage fully reusable system. The results
of these studies_ together with those already underway, will assure that
nothing is overlooked and that the shuttle concept finally selected for
development will indeed provide the most economical space transportation
system.