The Lockheed YF-12 was an American prototype twin-seat interceptor aircraft evaluated by the United States Air Force. The YF-12 set and held speed and altitude world records of over 2,000 miles per hour (3,200 km/h) and over 80,000 feet (24,000 m) (later surpassed... (více)
The Lockheed YF-12 was an American prototype twin-seat interceptor aircraft evaluated by the United States Air Force. The YF-12 set and held speed and altitude world records of over 2,000 miles per hour (3,200 km/h) and over 80,000 feet (24,000 m) (later surpassed by the SR-71), and is the world's largest manned interceptor to date. (méně)