Damon Hill wrote:
Pat Flannery wrote in
:

Dyna-Soar on a Atlas-Centaur:
http://renax.club.fr/sharkit/altlas-...as-centaur.htm

Article states the Centaur would burn LOX and "SF-1"; what the heck
would that have been? Seems like an obscure way to refer to LH2.

Indeed. The designation "SF-1" was a code name for a specification for
liquid hydrogen fuel that had been developed by Wright Field in the
1950's. The specification was apparently used to guide industrial firms
bidding on the development of LH2 facilities for the USAF.

--
Dave Michelson