Browse Topic: Mach meters

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Minimum Performance Standard for Mach MetersAS8018A (Current)06/19/2023
This AS covers subsonic and supersonic Mach meter instruments which, when connected to sources of static (Ps), and total (Pt), or impact (Pt-Ps), pressure provide indication of Mach number. These instruments are known as Type A. This AS also covers servo-operated repeater or digital display instruments which indicate Mach number when connected to the appropriate electrical output of a Mach transducer of Air Data Computer. These instruments are known as Type B
A-4ADWG Air Data Subcommittee
Technical Standard
Minimum Safe Performance Over Speed Warning InstrumentsAS8007 (Current)06/19/2023
This AS defines instruments which use inputs of static and pitot pressure equal to those which are utilized to establish the pressure altitude and speed of that aircraft. These pressures are applied to the instrument ports to provide means for generation of an aural warning whenever the aircraft reaches or exceeds the maximum operating limit speed. This Over Speed Warning Instrument function may be incorporated as part of an Air Data Computer, or an Air Speed Indicator, or an Air Speed/Mach Number Indicator, or other instruments. In those cases where the Over Speed Warning Instrument is part of another instrument, the standards contained herein apply only to the Over Speed Warning Instrument function. Each aircraft type and model has a defined maximum operating limit speed curve or curves which are a part of the airframe manufacturer's type certification approval data; this limit speed data shall be available from the subject airframe manufacturer as published in the operating manual
A-4ADWG Air Data Subcommittee
Technical Standard
Mach Meters (Turbine Powered Subsonic AircraftAS436 (Current)02/16/2008
This Aerospace Standard covers the direct reading pressure actuated type mach meter
A-4 Aircraft Instruments Committee
Technical Standard
MINIMUM PERFORMANCE STANDARD FOR MACH METERSAS8018 (Historical)10/01/1978
This AS covers subsonic and supersonic Mach Meter instruments which, when connected to sources of static (Ps), and total (Pt), or impact (Pt-Ps), pressure provide indication of Mach number. These instruments are known as Type A. This AS also covers servo-operated repeater or digital display instruments which indicate Mach number when connected to the appropriate electrical output of a Mach transducer of Air Data Computer. These instruments are known as Type B
A-4 Aircraft Instruments Committee
Technical Standard
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