Mach-II was created on 2003-08-01.
Mach 0.8-1.0
Mach 1.7 is equal to about 1294 mph.
645.38104_MPH_">645.38104 MPH-is 0.87 Mach -
Mach 6 is about 4,449.3 mph
Mach 1 is about 762 mph, so mach 20 is about 15,240mph.
the SR 71 goes really fast it goes Mach 7 NOT Mach 3.
889 mach is approximately 683,781.4 mph.
Mach 3.3 is about 2,512 mph depending on altitude.
mach 2.03
Mach 0.7 is 533 mi/h (rounded)
1,750.8 mph