6S2.390.126 Series 4 / PU-126

PU-126 function in helicopter control systems

The PU-126 control panel is intended for selection of operating modes, switching of control functions and generation of command signals for helicopter stabilization and semi-automatic control systems. The panel supports crew interaction with the connected autopilot / flight control equipment and allows control of flight stabilization functions in several channels. It is not a standalone autopilot computer; it operates as a cockpit interface unit within a larger flight control system.

Application with PKV-252 and VUAP-1 systems

The 6S2.390.126 Series 4 panel may be used as part of PKV-252 / PKV-252-1 flight control complexes and VUAP-1 unified helicopter autopilot systems, depending on aircraft configuration. It may operate together with related equipment such as 6S2.390.125 series panels, BK-252 switching units, VDU-252 director control computers and feedback sensors. Exact compatibility should be confirmed by the aircraft equipment list, autopilot documentation and product passport.

Control channels of PU-126

The PU-126 panel supports control and switching functions related to the main helicopter stabilization channels. These include roll channel control, pitch channel control and altitude channel control. Through these channels, the connected system can support angular stabilization, longitudinal balancing and barometric altitude hold functions. The exact functions available from the panel depend on the installed autopilot system, wiring and aircraft modification.

Cockpit installation of 6S2.390.126 Series 4

The panel is designed as an aircraft cockpit instrument panel unit. It may be installed on the central console, side console or other cockpit control area according to helicopter layout. The front panel includes operating controls and indication elements for crew use. Depending on modification, the panel may include red-white or green-compatible illumination for operation in day, night or NVG-related cockpit lighting environments.

Identification and ordering of 6S2.390.126 Series 4

The product may be referenced as 6S2.390.126 Series 4, 6С2.390.126 сер. 4, PU-126 or ПУ-126. For correct supply, it is useful to specify the aircraft type, installed flight control complex, required series, illumination version, connector configuration, condition, documentation requirements and whether the unit must be supplied with a passport, tag or test record.