below 10000ft limit of 250knots, above 10000ft airliners such as boeings and airbuses fly at speeds between mach .75 and mach .83 which in mph terms is roughly 500-560mph. learjets can fly faster at roughly 600mph
Above populated areas there is a law about noise, so breaking the sound barrier is forbidden, hence concordes reduced routes and commercial failure.
Slower than escape velocity, otherwise they'd fly out into space
I think they are not allowed to go past Mach 1. I would ask the ball and chain for sure cause he knows cause I am not speaking to him
That sounds like the beginning of a poem.
because it rhymes?