What's the fastest solid man-made object ever to go through sea-level air?

Not through reduced atmosphere like at high altitude or through vacuum like in space, not through helium or other lighter gases, not liquified or vaporized jets but physical objects only.














I'm assuming Hollerman Research Base might've been involved.What's the fastest solid man-made object ever to go through sea-level air?
It is actually a new weapon developed by the US Army that uses magnetic propulsion.What's the fastest solid man-made object ever to go through sea-level air?
The fastest object I'm aware of given your conditions is a 5.56 mm rifle bullet.
Bullets, missiles, and jets.
I'm sure it's not the fastest but a harpoon is up there
In terms of remaining in sea-level air as opposed to passing through it and attaining max speed in space (such as a satellite), I believe high-velocity artillery shells could be the fastest.
Bullets move at about mach 3, or so says a quick googling.





After that, consider the end of a bullwhip. When the whip is cracked, the end of the whip moves at the speed of sound.