. . "0"^^ . . . . . . . "NASA schematic from Access to Space Study"@en . . "The HL-42 was a proposed scaled-up version of the HL-20 re-usable manned spaceplane design, which had been developed from 1983 to 1991 at NASA's Langley Research Center but never flown. Like the HL-20 (\"Horizontal Lander 20\"), the HL-42 would have been launched into low earth orbit mounted on top of a two-stage expendable rocket. At the end of the mission it would have re-entered and glided to a runway landing. The HL-42 was suggested as one possible successor to the Space Shuttle in the NASA Access to Space Study of 1994. In the event another alternative, a Single-stage-to-orbit design, was chosen for further development, and work on the HL-42 was abandoned."@en . . "HL-42 (spacecraft)"@en . "Cancelled"@en . . . . "Manned spaceplane"@en . . . . "HL-42"@en . "off"@en . . "29"^^ . . "The HL-42 was a proposed scaled-up version of the HL-20 re-usable manned spaceplane design, which had been developed from 1983 to 1991 at NASA's Langley Research Center but never flown. Like the HL-20 (\"Horizontal Lander 20\"), the HL-42 would have been launched into low earth orbit mounted on top of a two-stage expendable rocket. At the end of the mission it would have re-entered and glided to a runway landing."@en .