Space Shuttle external tank

External tankThe first Space Shuttle external tank, given the designation MPTA-ET (main propulsion test article external tank), is completed at NASA’a Michoud assembly plant in New Orleans. Though constructed to flight specifications (as they stand in 1977), MPTA-ET is not intended for orbital flight, but is instead erected on a test firing stand at a NASA facility in Mississippi for tests of the three-engine shuttle propulsion system, tests which do not produce a satisfactory result until July 1980. Its job completed, MPTA-ET is later put on display at the U.S. Space & Rocket Center in Huntsville, Alabama.

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