The Soloviev D-25V is a Soviet gas-turbine turboshaft engine for use in large helicopters. Designed and originally manufactured by the Soloviev Design Bureau the engine has been in production since May 1960. The power unit consists of two engines coupled to a gearbox weighing 3,200 kg (7,050 lb).
The V in the designation means vertoletny (Russian: Вертолетный), for helicopters.
D-25V
Standard helicopter use production engines
D-25VF
Additional compressor zero-stage, power output 6,500 hp (4,847 kW)
D-25VK
A combined propeller and shaft output engine for the Kamov Ka-22 developing 5,500 hp (4,101 kW)
Mi-6 helicopter
Mi-10 helicopter
Mi-10K "flying crane" helicopter
Mi-12 helicopter
Kamov Ka-22 Compound helicopter
Data from Gunston and Jane's.
Type: Free-turbine single-shaft turboshaft engine
Length: 273.7 cm (107.75 in)
Diameter: 108.6 cm (42.8 in) (width) 115.8 cm (45.6 in) (height)
Dry weight: 1,325 kg (2,921 lb)
Compressor: Nine-stage axial flow
Combustors: 12-chamber cannular
Turbine: Single-stage compressor turbine, two-stage power turbine
Fuel type: Avtur
Maximum power output: 5,500 hp
Specific fuel consumption: 0.639 lb/shp/hr
Power-to-weight ratio:
