3 ms·
The article said ICBMs were hypersonic, and those certainly spend a lot of time outside of the atmosphere. The gliders seem to spend the entirety of their trip
by arijun 3y ago
The article said ICBMs were hypersonic, and those certainly spend a lot of time outside of the atmosphere.
The gliders seem to spend the entirety of their trip in the upper atmosphere, though.
- dabluecaboose 3y agoReentry does kind of by definition enter the hypersonic regime, but it's somewhat unintuitive to the layperson since Mach 5 is much slower at those very low pressures, and it's an entirely different beast than flying at Mach 5 in-atmosphere proper