The air inlets were the key factor that helped the J-58 engines to provide 32,000 pounds of thrust and allow the Blackbird to reach Mach 3.2. The Pratt and Whitney J-58 engine was a dual cycle engine, ...
At the speeds the SR-71 operated, surface temperatures were extremely high due to aerodynamic heating: 800 degrees at the nose, 1,200 degrees on the engine cowlings, 620 degrees on the cockpit ...
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