AGB-96D

AGB-96D artificial horizon in flight instrument systems

The AGB-96D is a gyroscopic artificial horizon used in flight and navigation instrument systems of Mi-8 family helicopters. It gives the crew a visual reference of the helicopter’s position relative to the horizon and supports attitude monitoring during manual and automatic flight. The instrument displays roll, pitch and lateral slip information, helping the crew maintain spatial orientation in normal flight, limited visibility and instrument conditions. It is installed on the cockpit instrument panel and forms part of the standard attitude indication equipment.

Roll, pitch and slip indication with AGB-96D

The main function of the AGB-96D is to show the aircraft attitude in a clear mechanical-visual format. The roll scale gives bank angle information, while the pitch indication shows nose-up and nose-down attitude relative to the horizon. The instrument also provides lateral slip indication, which helps the crew monitor coordinated flight. For helicopter operation, this is important during turns, hover transitions, climb, descent and flight in poor external visibility, where attitude reference must be stable and easy to read.

Electrical signal output from the AGB-96D

In addition to visual indication, the AGB-96D generates proportional electrical signals for roll and pitch. These signals can be transmitted to onboard systems such as automatic control equipment and flight data recording systems. This makes the instrument more than a cockpit display: it also works as a source of attitude-related data for connected avionics. If the electrical output is incorrect, the cockpit indication may still need to be checked together with the connected control and recording circuits, depending on the aircraft configuration.

AGB-96D in helicopter automatic control systems

The AGB-96D may be integrated with automatic control and stabilization systems installed on Mi-8, Mi-17, Mi-171 and Mi-172 helicopters. In this role, the instrument supplies attitude information that can be used by downstream systems for monitoring, stabilization or recording. The artificial horizon does not move helicopter controls directly. It provides attitude indication and output signals, while the connected systems process those signals according to their own logic. Correct installation and calibration are therefore important for both cockpit use and system interaction.

Cockpit installation of the AGB-96D instrument

The AGB-96D is mounted on the instrument panel, which is inclined forward relative to the vertical according to the installation requirement. The mounting angle matters because the instrument must align correctly with the cockpit panel and the pilot’s viewing position. During inspection, attention is normally given to the case, glass, display movement, slip indicator, connectors, mounting points, lighting, power supply and warm-up behavior. A unit may look serviceable externally but still require functional checking before installation.

Power supply and operating readiness of AGB-96D

The AGB-96D operates from aircraft DC and AC power sources. DC power is supplied from two independent sources, while AC power is used for backlighting and sensor circuits. After power-up, the instrument requires a short warm-up period before normal operation. Warm-up time can increase under non-standard temperature conditions, so this parameter is important during pre-flight checks and maintenance procedures. The instrument is designed for long continuous operation during extended flights, provided that power supply and operating conditions remain within limits.

Supply and documentation for AGB-96D

The AGB-96D is aviation flight instrument equipment and may be supplied as new, from storage, repaired, overhauled or serviceable depending on availability. For aircraft installation, documentation and technical condition are important. Technical documentation may be provided on request, and the unit should be checked for compatibility with the required helicopter type and onboard system configuration. Before shipment, it is advisable to confirm condition, completeness, markings, test status and the required documentation package.

Product Type: Gyroscopic artificial horizon
Designation: AGB-96D
Cyrillic Designation: АГБ-96Д
Alternative Designation: AGB-96D
Function: Visual indication of roll, pitch and lateral slip angles; generation of roll and pitch electrical output signals
Application / Where Used: Flight and navigation instrument systems; automatic control systems
System / Installation Area: Cockpit instrument panel, inclined forward by 15° relative to vertical
Compatible Aircraft / Equipment: Mi-8, Mi-17, Mi-171 and Mi-172 helicopters
System Role: Attitude indication and transmission of attitude-related electrical signals to connected onboard systems
Roll Range: ±360°
Pitch Range: +90° / −60°
DC Power Supply: 27 V DC from two independent sources
AC Power Supply, Backlight: Single-phase AC, 400 ±20 Hz, 5.5 ±0.5 V
AC Power Supply, Sensors: Single-phase AC, 400 ±8 Hz, 36 V
DC Current Consumption: Not more than 0.8 A
Warm-Up Time, Normal Conditions: Not more than 2 minutes
Warm-Up Time, −20 °C to +55 °C: Not more than 3 minutes
Continuous Operation Time: 15 hours
Overall Dimensions: 105.6 × 105.6 × 245 mm
Weight: Not more than 2.5 kg
Condition: As applicable
Technical Documentation: Technical documentation available upon request

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Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.