About 340 meters/second
4 football fields second
the speed of sound
One of the reasons why cars go fast is what size of an engine they have.
Some rocket planes can go as fast as six times the speed of sound. Most military fighter planes do not go faster than twice the speed of sound, and the typical civilian passenger/transport plane goes slower than the sound barrier.
A blackbird doesn't go "through the speed of sound", it moves through the air.
About 340m/s at sea level
Until the rota blades reach the speed of sound.
3 times the speed of sound.
ItS wings go very fast and vibrate
More than twice the speed of sound. About 1600 mph.
Up to Mach 2 (= 2x the speed of sound.)
About 3 times the speed of sound. (3 mach)
The A in "fast" is a short A sound. (The long A would make it sound like faced.)