Mikoyan MiG 105 Spiral & 50-50
Soviet rocket designers had also long been fascinated by the concepts of Eugen Sanger and sketched out many variations on the space-plane theme. In 1962 the Mikoyan Design Bureau formally presented it's "50-50" concept. The name came from the 2 components of the system: a hypersonic mothership aircraft and its single-seat orbital space-plane cargo.
Deep Cold by Dan Roam. All text and images © 2001