Brig. General Chuck Yeager, who flew at the speed of sound has died
“We call the speed range just below and just above the sonic speed-Mach number nearly equal to 1-the transonic range. Dryden [Hugh Dryden, well-known fluid dynamicist and past administrator of the National Advisory Committee for Aeronautics] and I invented the word ‘transonic’ We had found that a word was needed to denote the critical speed …