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The best known speed record, though it has been broken since, was set in 1947 by the Bell X-1, piloted by Chuck Yeager.
The X-1, powered by an XLR11 rocket motor, pushed beyond the sound barrier in 1947 after being released from a B-29 Superfortress at 23,000 feet.
With the thermal expansion and contraction, the SR-71 would leak fuel from its tanks, which carried JP-7 fuel specially made for supersonic aircraft with a higher flash point than regular jet fuel's.
Even with its respectable speed capabilities, the Osprey can carry up to 20,000 pounds of internal and 15,000 pounds of external cargo.
The V-22 first flew in 1997 after nearly a decade of flight testing on early prototypes, some of which were designed for vertical flights, others for horizontal.
Powered by two Pratt & Whitney J58 engines (which were also designated as JT11D-20s), each producing 32,500 pounds of thrust, the SR-71 reached a sweet spot of Mach 3.2.
Lockheed realized that at the targeted speeds the airplane would generate a lot of heat on the leading edges, hence the airplane was constructed using titanium alloys.
While several versions of the Lynx have been flown with a variety of engine configurations, the fastest one, with the tail number G-LYNX, was equipped with Rolls-Royce Gem 60 engines spinning rotor blades designed by the British Experimental Rotor Programme.