8-3922-00

Yaw control function of the 8-3922-00 blade

The 8-3922-00 blade produces aerodynamic thrust when the tail rotor rotates. Through the tail rotor pitch-control system, the blade angle changes according to pilot pedal input and current flight conditions. This allows the helicopter to increase or reduce anti-torque thrust and control yaw movement around the vertical axis. Stable blade operation is required during hover, takeoff, climb, cruise, descent and landing. Since the blade works under variable aerodynamic and centrifugal loads, its geometry, surface condition, attachment area and balance condition have direct influence on tail rotor performance.

8-3922-00 in the tail rotor system

The 8-3922-00 blade is part of the tail rotor assembly installed on the helicopter tail boom. It works with the tail rotor hub, which provides blade attachment and transmits control forces for pitch variation. The blade itself generates lateral thrust, while the hub and control mechanism set the pitch angle. These parts must be treated as one operating system. A blade with the correct external shape is not automatically suitable for installation unless the part number, hub compatibility, technical bulletin status and aircraft documentation confirm applicability.

Application of 8-3922-00 on Mi-8 family variants

The 8-3922-00 tail rotor blade is used on different Mi-8 family helicopter modifications and derivative models. Application references include Mi-8, Mi-8T, Mi-8MSB, Mi-17, Mi-171 and Mi-172 helicopters, depending on the installed tail rotor configuration and documentation. Since aircraft may differ by modification, production year, overhaul history and approved bulletins, applicability should be checked before supply or installation. This is especially important when replacing one blade, completing a matched blade set or comparing older and newer tail rotor configurations.

Interchangeability of 8-3922-00 and related blade versions

Several tail rotor blade versions exist for Mi-family helicopters, including 8-3922-00 and 246-3925-00. These blades may differ by design details, approved installation scope, service life limits and operating conditions. Their interchangeability should not be assumed only by general aircraft type or visual similarity. The correct blade is selected according to technical bulletins, aircraft records, component logbook and operational documentation. For maintenance or overhaul supply, the exact blade designation and approved configuration must be confirmed before dispatch.

Identification and service control of 8-3922-00

The 8-3922-00 blade is a controlled aviation component with service life and calendar limits recorded through documentation. Depending on production year, bulletin status and operating conditions, service limits may vary. Some technical references specify assigned service life up to 1500 flight hours and calendar service life up to 7 years for this blade type. When supplied as new or serviceable used stock, the blade should be checked by marking, logbook, condition and remaining resource. Documentation is especially important because installation eligibility depends not only on physical condition, but also on recorded service history.