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Passenger flips over into dangerous waves at Boca Inlet 😳

998,416 次观看 • 7 个月前 •via X (Twitter)

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The SR-71 Blackbird converts supersonic air to subsonic speeds using a movable, conical "spike" in the engine inlet that generates a series of shock waves, slowing air from over Mach 3 to roughly Mach 0.4 before it reaches the compressor. This process, crucial for the J58 engine, transforms high-speed, low-pressure air into high-pressure air at a manageable speed, generating a majority of the total thrust. Mechanism for Slowing Air •Inlet Spike Position: The sharp, cone-shaped spike moves up to 26 inches backward as the aircraft accelerates, optimizing shock wave alignment. •Oblique Shock Waves: At supersonic speeds, the spike produces a series of angled oblique shock waves that slow and compress the air. •Normal Shock Wave: A terminal shock wave forms at the inlet mouth, effectively slowing the air to subsonic velocity. •Variable Geometry: The inlet computer automatically manages the spike position and bypass doors to prevent "inlet unstart"—an immediate loss of thrust caused by shock wave misalignment.  Benefits and Components •Pressure Conversion: The inlet acts like a "garden hose in reverse," where the reduction in speed is converted into massive pressure increase. •Subsonic Compression: The engine itself is a turbojet, which can only function on subsonic air. •Bypass Air: Excess air is bled off and reintroduced at the exhaust, adding more efficiency and thrust.  •YouTube : How the Lockheed SR-71 Blackbird works by Amimagraffs

Habubrats SR-71

71,946 次观看 • 2 个月前