SK-22-2M

SK-22-2M aircraft ignition unit

SK-22-2M is an aircraft ignition unit used to convert low-voltage DC power into high-voltage pulses for spark plugs in gas turbine engine ignition systems. The unit is intended for reliable ignition of the fuel-air mixture during engine start on the ground and, where applicable, during in-flight restart. In the supplied context, SK-22-2M is associated with aviation and industrial gas turbine equipment, including Mi-8 helicopters with TV3-117 engines and ground gas turbine installations.

Function of the SK-22-2M ignition unit

The main function of SK-22-2M is generation of high-voltage ignition pulses from the 27 V DC power supply. These pulses are sent to semiconductor surface-discharge spark plugs installed in the combustion chamber ignition system. The unit supports stable spark formation during engine starting conditions, including low-temperature starts and operating environments with vibration and electrical interference. Correct operation of the ignition unit is important for reliable gas turbine engine start sequence and restart capability.

Application on aviation and industrial gas turbines

SK-22-2M and related versions of the SK-22-2 family are used in aviation equipment, civil and military aircraft systems, and industrial gas turbine installations. In aviation, the unit is associated with gas turbine engines such as TV3-117 used on Mi-8 family helicopters, depending on engine and aircraft documentation. In industrial use, similar units may be installed on gas compressor and energy-sector gas turbine equipment, including NK-16ST-type installations according to the supplied context.

Two-channel ignition circuit

The unit has two independent and equivalent high-voltage output circuits. This configuration allows operation with two ignition plugs and provides functional redundancy within the ignition system. The supplied context describes SK-22-2M as a replacement or improved alternative to earlier SK-22-2K units. Related versions include SK-22-2K, SK-22-2KU and SK-22-2MK, but interchangeability should be confirmed through engine documentation, installation drawings and electrical interface requirements.

Construction of SK-22-2M

The SK-22-2M ignition unit is built in a sealed metal housing suitable for aviation operating conditions. Internal components may include induction coils, rectifiers, storage capacitors, activators and discharge elements, depending on exact modification. Electrical connection is made through aviation plug connectors, including 2RTT-type connector references in the supplied context. The unit is designed to withstand vibration, temperature variation and radio-interference conditions typical of engine compartments and gas turbine installations.

Identification and ordering of SK-22-2M

Before ordering SK-22-2M, the buyer should confirm the exact modification, engine type, aircraft or installation type, spark plug type, connector version and documentation requirements. It is also useful to confirm whether SK-22-2M is required specifically or whether SK-22-2K, SK-22-2KU or SK-22-2MK is acceptable. The unit may be required for engine start system repair, replacement of a defective ignition unit, overhaul stock or support of Mi-8 / TV3-117 and industrial gas turbine equipment.

Product Type: Ignition unit / high-voltage pulse generator
Designation: SK-22-2M
Russian Designation: СК-22-2М
Alternative Designations: SK22-2M, SK 22-2M, SC-22-2M, SC22-2M, СК22-2М, СК 22-2М
Related Modifications: SK-22-2K, SK-22-2KU, SK-22-2MK / СК-22-2К, СК-22-2КУ, СК-22-2МК
Alternative Product Names: Ignition aggregate, ignition unit, high-voltage ignition unit, gas turbine ignition unit
Function: Conversion of 27 V DC power into high-voltage pulses for ignition plugs
Application / Where Used: Aircraft gas turbine engine ignition systems and industrial gas turbine installations
Compatible Aircraft / Equipment: Mi-8 family helicopters and TV3-117 engine installations according to source context; other equipment depending on documentation
Associated Industrial Equipment: NK-16ST-type gas turbine installations according to source context
Spark Plug Type: Semiconductor surface-discharge ignition plugs according to source context
Number of Output Circuits: Two independent equivalent high-voltage circuits
Power Supply: 27 V DC ±10%
Stored Energy Reference: 2.2 ±0.22 J for MK modification according to source context
Weight: Not more than 3.35 kg
Operating Temperature Range: −60 °C to +60 °C
Vibration Resistance: Up to 230 Hz according to source context
Interference Protection: Radio-interference protection according to source context
Construction: Sealed metal housing with high-voltage ignition components
Internal Components: Induction coils, rectifiers, storage capacitors, activators and discharge elements according to source context
Connector Interface: Aviation plug connector, including 2RTT-type connector reference according to source context
Condition: New / first-category stored item / As-Stored / Overhauled / Serviceable, depending on availability
Technical Documentation: Product passport, engine documentation, wiring diagram, inspection records and test documents if available

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In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

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.