News World Know about SR-72 spy plane that can traverse a continent in less than an hour

Know about SR-72 spy plane that can traverse a continent in less than an hour

New Delhi: SR-72 blackbird is a spy plane that can cross a continent in less than an hour.The unmanned, hypersonic aircraft is being designed by American aerospace company Lockheed Martin.With a mach speed of 6,

However, in 1998 it was retired due to high maintenance costs.

SR-72 would become functional in 2030.