SP-4221 The Space Shuttle Decision

Three classes of advanced launch vehicle studied in 1966. Left, Class I: a piloted spacecraft resembling Dyna-Soar, launched by a Saturn I-B. Center, Class II: a two-stage fully-reusable space shuttle with rocket propulsion in both stages. Right, Class III: space shuttle with airbreathing engines in the first stage. (U.S. Air Force)

Three classes of advanced launch vehicle studied in 1966. Left, Class I: a piloted spacecraft resembling Dyna-Soar, launched by a Saturn I-B. Center, Class II: a two-stage fully-reusable space shuttle with rocket propulsion in both stages. Right, Class III: space shuttle with airbreathing engines in the first stage. (U.S. Air Force)

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