BDG-1094 Series 6

Function of the BDG-1094 angular-rate block

The main function of BDG-1094 is to measure aircraft angular rates around the main control axes and transmit proportional electrical signals to the automatic control system. These signals are used in roll, pitch and heading / yaw channels to reduce oscillations and improve dynamic stability. The block is part of the aircraft control loop and is not a standalone cockpit indicator. Its output is used by the SAU / ABSU equipment to form damping and stabilization commands.

BDG-1094 in SAU-1T-2 systems

BDG-1094 Series 6 is described in the source context as a component of the SAU-1T-2 system and its variants, including SAU-1T-2B and SAU-1T-2-86. These systems are used in flight-control equipment of aircraft such as the Il-76, depending on modification and installed avionics. In this role, the block supplies angular-rate feedback for the automatic control system and helps the aircraft maintain stable behavior during flight, maneuvering and disturbance rejection.

Measurement channels of BDG-1094

The BDG-1094 block measures angular velocities along three mutually perpendicular aircraft axes. In the source context, these are described as roll, pitch and heading channels. The measured rates may be referenced to the aircraft’s main deformation axes in system documentation. The unit provides electrical outputs proportional to these angular rates. This allows the control system to detect deviations quickly and apply corrective damping through the relevant control channels.

Construction and operating principle

BDG-1094 belongs to the class of mechanical angular-rate gyroscope blocks used in Soviet and Russian aircraft automatic control systems. The source context describes sensitive elements as mechanical two-degree gyroscopes with torsion elements that create restoring torque, along with liquid or magnetic damping. Gyro motors are powered from the aircraft AC network, while output potentiometer circuits use DC power. After power-up, the gyro motors require time to reach stable operating speed before the block is ready for normal operation.

Ordering and replacement of BDG-1094

When ordering BDG-1094, the buyer should specify the exact series, especially if Series 6 or BDG-1094M is required. It is also important to confirm the aircraft type, installed SAU version, condition, passport availability, repair certificate, storage records and test status. Since BDG-1094 is part of an automatic flight-control system, interchangeability should be checked through aircraft documentation, wiring diagrams and system maintenance manuals before installation.