Honeywell HG2050AC11 Air Data Inertial Reference Unit (ADIRU)

This unit combines air data reference (ADR) and inertial reference (IR) capabilities into a single, fault-tolerant package, enhancing system reliability and reducing weight. It supplies essential flight parameters to various aircraft systems, including the Electronic Flight Instrument Systems (EFIS), autopilot, and Flight Management System (FMS). For air data, the ADIRU measures and calculates airspeed, Mach number, barometric altitude, angle of attack, and total air temperature. For inertial data, it utilizes high-performance digital ring laser gyroscopes and quartz accelerometers to determine attitude (pitch, roll, yaw), heading, ground speed, and the aircraft's precise position. The unit features high-performance digital ring laser gyroscopes and quartz accelerometers designed for a high Mean Time Between Failure (MTBF), ensuring dependable operation.