SPUU-52

Automatic limitation through SPUU-52

In operation, SPUU-52 changes the position of the movable stop according to pressure and temperature inputs. The system uses signals from the pressure measurement set and temperature receiver, processes them in the control unit, and sends a command to the actuator. The stop then changes position and limits further mechanical travel. This is done automatically, without the crew setting the stop manually for every change of altitude or outside air temperature. The exact movement depends on system adjustment and on the signal chain from sensors to actuator and feedback sensor.

Control system work around the SPUU-52 set

The SPUU-52 set works as a chain. The BU-32 control unit processes the incoming signals. The IKD27DA-400-830 pressure measurement set supplies pressure data. The P-1 or P-1Tr temperature receiver supplies temperature data. The DOS 6S2.553.009 feedback sensor confirms the actual movement of the stop. The actuator mechanism, often listed as MP-100M in technical descriptions, physically moves the stop. If the system does not limit travel correctly, the problem may be in any of these units, in the wiring, in the actuator movement, or in the feedback path.

Aircraft application of SPUU-52

The SPUU-52 is used in aircraft control systems where coordinated limitation by pressure and temperature is required. Public technical materials most clearly describe it in relation to Mi-8 / Mi-17 helicopter control systems, especially the tail rotor control channel and movable stop mechanism. Variants of the system may differ by aircraft version and equipment standard. Some descriptions mention versions such as SPUU-52-1, SPUU-52E, SPUU-52-2, and SPUU-52-3, with different BU-32 blocks and settings. For supply or replacement, the exact aircraft documentation should be checked.

Identification and ordering checks for SPUU-52

Before ordering, the system composition should be checked against the aircraft parts catalog, summary passport, and installed equipment list. A request for “SPUU-52” may refer to the complete set or to one of its components: BU-32, DOS feedback sensor, IKD27DA pressure measurement set, P-1 temperature receiver, mounting hardware, passports, or labels. For a clear request, it is better to specify whether the complete system is required or only a module from the set. The product is also known under alternative designation СПУУ-52.