M/VEL Scale


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M/VEL Scale 
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The M/VEL scale displays one of the following: Mach number, relative velocity, or inertial velocity. Mach number is the ratio of vehicle airspeed to the speed of sound in the same medium. The relative velocity is in feet per second in relation to the launch site. Inertial velocity is in feet per second and does not consider the rotational speed of the surface. The actual parameter displayed is always Mach number; the tape is simply rescaled above Mach 4 to read relative velocity (MM 102, 304, 305, 602, 603) or inertial velocity (MM 103, 601). The scale ranges from zero to 27, with a scale change at Mach 4.


Non-normal Procedures

Normal Procedures



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