Aft End: 2.4 m (94 in) wide, 2.4 m (94 in) long The Rocketdyne RS-2200 was an experimental linear aerospike rocket engine developed by Rocketdyne for Lockheed Martin's VentureStar program.

[1][2] The program was ultimately cancelled in 2001 before any RS-2200 engines were assembled.

[3][4][5] The XRS-2200 was a subscale testbed engine that was intended to be developed into the full-scale RS-2200.

This engine, unlike its full-scale counterpart, made it to the test stand and accumulated approximately 1,600 seconds of hot-fire testing.

[3] This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.