Data sheet - Helicopter air data system (HADS)
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The Meggitt Avionics’ helicopter air data system (HADS) is a unique and proven solution to the problems of helicopter air data measurement. Using a swivelling pitot probe, a modern digital air data computer and proprietary algorithms, the system measures airspeed across the complete flight envelope. In the usual single probe system configuration, the HADS consists of an airspeed and direction sensor (AADS) and a miniature high integration air data computer (HIADC+). The AADS is mounted on the airframe in a position where it is in downwash for low speed flight and free of major aerodynamic influences such as the engine. • Highly intelligent core sensor known as airspeed and direction sensor (AADS) • Unique rotary wing -specific solution • Measured downwash, vertical airspeed and altitude rate supplied as separate parameters • Combined with an inertial or GPS based-navigation system can provide real-time wind measurement in three directions • The only fully proven helicopter air data system in series production • Operates accurately over the full flight envelope AADS can sense: • flow angles • pitot and static pressures • air temperatures • Provides a full set of air data and air temperature based calculations • Records full set of air data and air temperature based calculations All this data is sent to the HIADC+ which computes outputs for aft, left-right and up-down velocity, altitude rate, rotor downwash and many other air data parameters. Meggitt Avionics Our capabilities: Air data | Flight displays | Life support | Legacy MEGGiTT smart engineering for extreme environments

Air data > Helicopter air data system (HADS) HADS is in more places than you think ... HADS has been flight tested and its performance proven on - Wessex Scout, BO-105, UH-1C, NUH-1M, YUH-60, YUH-61, YAH-63, YAH-64, AH-1G/S, UH-1B, Lynx, CH-47C, A-129, EH-101, JUH-60A, UH-60A, AH-1W, AH-64D, Puma, AH-1Z and is in use on several attack helicopters. The system is used by many organisations in the UK and USA. Helicopters requiring: • accurate low speed air data • a fire control solution for unguided weapons • full envelope air data parameters Or applications where real-time wind mea: • sling...