Hot-fire test of linear aerospike mounted on SR-71 still months away
AEROSPIKE TEST: NASA is moving cautiously on plans to test a subscale linear aerospike engine for Lockheed Martin on its SR-71 research aircraft, and won't try a hot-fire test soon. In mid-December the SR-71, in a Mach 1.6, 50,000-foot flight, demonstrated it can meet all planned test points...
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