Une histoire forte L'héritage de THOMMEN AIRCRAFT EQUIPMENT Ltd. remonte à la création de REVUE THOMMEN AG en 1853 en tant que fabricant de montr...
The THOMMEN MD21 Electronic Standby MACH Airspeed Indicator is highly reliable and indicates airspeed and MACH number with upmost accuracy. It is a direct replacement for mechanical standby airspeed indicators.
It measures pitot and static pressure with proven integrated solid state pressure sensors and displays the computed airspeed by an analogue pointer and a sunlight readable digital Liquid Crystal Display.
The MD21 Electronic Standby MACH Airspeed Indicator has a range of 0 to 450 knots and 0 / 0.200 to 0.999 MACH. VMO/MMO over speed warning is provided by a LED in the bezel.
It is designed to operate from 28 VDC primary power. LED-Lighting is controlled by an external 5 VDC (28 VDC optional) voltage. The lighting is available in white. Discrete outputs are available as an option. The RS-232 serial interface provides communication for maintenance and parameterization. An extensive Built-In-Test function guarantees safe operation.
The THOMMEN MD21 Electronic Standby MACH Airspeed Indicator is certified to ETSO/TSO-C2d, ETSO/TSO-C46a and ETSO-C95/TSO-C95a. It is tested to DO-160D and DO-178B SW level A.