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Hypersonic Research AircraftThe X-15 is a famous and significant part of aviation history. Its purpose was to fly high and fast, testing the machine and subjecting pilots to conditions that future
Myasishchev M-55 Geophysica (Mystic-B) High Altitude Reconnaissance Aircraft was Developed from the M-17 - Powered by: 2 × Soloviev D-30-V12 Low-Bypass Turbofan, Rated at: 20,950 lbf Thrust each – Ceiling: 70,500 ft – 34 were Built (5)