弥舞秀人🔞C109 火曜 南1 s11a

The first picture; The second photograph is the aircraft. I believe they’re preparing to fly again for NASA. The inlet spike (cone) on the Lockheed SR-71 Blackbird is a movable mechanical cone centered inside each engine nacelle that controls supersonic airflow. The second photograph is the aircraft. I believe they’re preparing to fly again for NASA. Why the Spike is Needed • Subsonic requirement: Jet engines (the Pratt & Whitney J58 turbojets) cannot swallow supersonic air directly; the air must be slowed down to subsonic speeds before entering the compressor. • Shock wave control: As the aircraft flies faster than the speed of sound (Mach 3+), the sharp tip of the spike generates an angled oblique shock wave. A series of internal shock waves and a terminal normal shock wave slow the air while dramatically increasing its pressure, density, and temperature. • Ramjet-like boost: At Mach 3, the compression created by the spike and the bypass system provides a massive share of the aircraft’s total thrust (over 50% from the inlet alone), turning the engine into a hybrid turbojet-ramjet. How It Operates During Flight • Subsonic / Takeoff: The spike is locked in a fully extended, forward position. • Mach 1.6 and above (above 30,000 feet): An air inlet computer unlocks the spike and begins retracting it rearward—moving roughly 1.6 inches for every 0.1 increase in Mach number. • Mach 3.2 Cruise: The spike is fully retracted 26 inches backward into the engine throat to keep the shock wave system precisely aligned. Excess air is routed through bypass doors around the engine Linda Sheffield