NASA used the SR-71 Blackbird in the 1990s to study high-speed flight, propulsion, sonic booms and hypersonic technologies at ...

Discover some prominent but rare aircraft, which small fleets has played vital roles.

Titanium is fantastically expensive, and difficult to fabricate, relative to other materials—meaning it was only ever practical to use on the world’s fastest plane. The SR-71 Blackbird was built from ...