Mach Number Calculating Mach number using velocity and speed of sound. Description The Mach Number block calculates the Mach number. The Mach number is defined as: , where - is the speed of sound; - velocity vector. Ports Input V - speed `vector 3 to 1 The velocity given as a 3 by 1 vector. Data types: Float64. a - speed of sound scalar The speed of sound given as a scalar. Data types: Float64. Output Mach - Mach number `scalar Mach number returned as a scalar. Data types: Float64. Additional options C code generation: Yes