Commercial airliners are sub mach1. The Charles de Gaulle is reported to go at least 27 knots at top speed. 27*16=432, a 777 goes 510-520 knots. So maybe mor

Commercial airliners are sub mach1. The Charles de Gaulle is reported to go at least 27 knots at top speed. 27*16=432, a 777 goes 510-520 knots. So maybe more like 18-19x. For the carriers it is at least as the true top speed is classified.