United Engine Corporation (UEC), a subsidiary of Rostec, is broadening its scope to include a new generation of powerplant technologies that are specifically designed for Russia’s light aviation and civilian unmanned aircraft sectors, in addition to large civil aircraft engines. Among the developments being highlighted are the M105 piston engine and a 400-kW turbogenerator based on the VK-650V helicopter engine.
The developments are part of Russia’s efforts to establish a more self-sufficient ecosystem for unmanned aviation, helicopters, autogyros, and light aircraft. Two of the main priorities for the development of technological independence in small aviation have been identified by the country’s Industry and Trade Ministry: engines and avionics. Anton Alikhanov, the Minister of Industry and Trade, stated at the INNOPROM-2026 discussion on the future of the sector that Russia had the opportunity to achieve technological independence in small aviation.
M105: A New Engine for Light Aircraft
At the centre of UEC’s small-aviation portfolio is the M105, a compact, turbocharged, four-stroke, four-cylinder aircraft piston engine producing 115 horsepower. The M105V modification is intended for light helicopters and autogyros, while the engine is predominantly designed for civilian light aircraft.
The M105 was first introduced to the public at the NAIS 2026 aviation infrastructure exhibition in Moscow by UEC. The company said prototype engines had already been manufactured, marking an important step toward establishing a domestic powerplant for an area of aviation where Russia has historically depended heavily on foreign engines.
The M105 has a piston stroke of 61 millimeters and a displacement of 1,211 cubic centimeters. The engine’s power-to-weight ratio is relatively compact for its class, as its stated mass is approximately 75 kg in the actual operating configuration. The UEC specifies a total assigned service life of 2,000 operating hours, an overhaul interval of 750 hours, and a service life of 10 years.
Designed to accommodate a variety of aircraft types
The M105’s potential for adaptability is one of its advantages. The M105V derivative is designed for helicopters and autogyros, while the fundamental engine is capable of powering light aircraft, according to UEC. The powerplant can also be used to operate tractor or pusher propellers or to supply mechanical power to an electrical generator.
This adaptability may prove advantageous as Russia expands its roster of domestic aircraft. Manufacturers have the option of adapting a common powerplant architecture to various aircraft configurations, rather than creating a unique engine for each platform.
Additionally, UEC is developing an industrial infrastructure around the M105. The government of Bashkortostan has provided support for the establishment of a dedicated production facility in a special economic zone. The proposed center is designed to include the entire lifecycle of the product, from engineering and manufacturing to warranty and service support.
A 400-kW Turbogenerator Based on VK-650V
The second major development pertains to a distinct need: the generation of electrical power for unmanned platforms and advanced aircraft.
UEC has created a turbogenerator that is derived from the VK-650V gas-turbine engine, which was initially designed as a powerplant for light helicopters. The system is intended to produce electrical power and has a rated output of 400 kW. The initial UEC disclosures estimated the total mass of the turbogenerator to be approximately 200 kg. However, the most recent energy-unit configuration’s specifications indicate a dry mass of 185 kg and an approximate 80% localization.
Specific fuel consumption for the system is specified as 0.369 kg/kWh. It is crucial to maintain the generator’s performance and reliability under sustained electrical demands, which is achieved through the use of liquid cooling.
The significance of the system extends beyond conventional helicopter propulsion. A compact 400-kW power source can serve as the electrical core of hybrid-electric propulsion architectures, heavy unmanned aircraft and other advanced platforms requiring large amounts of onboard electrical power. UEC has previously stated that its turbogenerator, which is based on the VK-650V, is suitable for use in vertical or short-takeoff-and-landing aircraft and unmanned aircraft.
VK-650V Creates a Wider Technology Base
The underlying VK-650V engine is itself an important element of Russia’s domestic light-aircraft strategy It is capable of producing 650 horsepower during take off and up to 750 horsepower during emergency operations. The powerplant was utilized in the Russian import-substituted Ansat light helicopter program after receiving its type certificate in 2024.
This implies that UEC is building a variety of applications based on a shared engine technology: conventional helicopter propulsion on the one hand, and electrical power generation for future aircraft on the other.
Building a Domestic Small-Aviation Ecosystem
The broader objective is therefore larger than the introduction of a single new piston engine. Russia is determined to establish a comprehensive domestic ecosystem that includes engines, aircraft, avionics, manufacturing, and after-sales support.
The M105 is designed to cater to the low-power segment of the market, which is primarily comprised of light aircraft and autogyros. On the other hand, the VK-650V-based turbogenerator is designed to operate at a considerably higher power level, making it suitable for sophisticated unmanned and hybrid-electric platforms. The 13-hp APD-13, which has already undergone ground and flight testing, is one of the smaller piston engines that UEC has demonstrated for civilian UAVs.
These programs collectively suggest that Russian engine development is becoming more structured around a family of powerplants, rather than isolated initiatives. The M105 and VK-650V-based systems could provide Russia with new domestic options in several swiftly developing segments of small aviation if certification, production, and industrialization proceed as planned.
However, the immediate obstacle will be transitioning from technology demonstrators and prototypes to dependable serial production. Certification and the establishment of a sustainable production and service network will be particularly important for the M105. One of the building elements of a revitalized Russian small-aviation industry could be the engine, provided that those steps are successfully executed.