Mach 3.4 was also fast enough that early radar systems couldn't track it. The pl...

		burfog on Jan 16, 2018 \| parent \| context \| favorite \| on: America’s Fastest Spy Plane May Be Back and Hypers... Mach 3.4 was also fast enough that early radar systems couldn't track it. The plane would move far enough between radar pulses that it got filtered out as noise.