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Stennis History

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Photo - MPTA Lifted onto Test Stand Photo - Close-up of MPTA During Test Photo - Close-up of MPTA

Testing of the Shuttle's Main Propulsion Test Article (MPTA) was critical before the launch of the first shuttle in 1981. The MPTA consisted of a simulated orbiter structure, aft propulsion compartment and a cluster of three Space Shuttle Main Engines.