GTD-350
Type	Turboshaft
Manufacturer	Klimov
First run	1963
Major applications	Mil Mi-2
Number built	> 11,000

TheKlimov GTD-350 (initiallyIsotov GTD-350) is a Soviet gas-turbineturboshaft engine intended for helicopter use. Designed in the early 1960s by theIsotov Design Bureau the engine was later produced byKlimov andPZL, production ending in the late 1990s.^[1]

The GTD-350 powers theMil Mi-2, the first Soviet gas-turbine powered helicopter, and has accumulated over 20 million hours in service.^[1]

• Mil Mi-2

Data from Klimov,^[1] World Encyclopaedia of Aero Engines,^[2] Aircraft engines of the World 1970^[3]

• Type: Turboshaft
• Length: 1,350 mm (53 in)
• Diameter: ~450 mm (18 in) inlet casing
  
• Width: 522 mm (20.6 in)
• Height: 680 mm (27 in)
• Dry weight: 135 kg (298 lb)

• Compressor: Seven-stage axial flow plus single-stage centrifugal
• Combustors: Single-chamber reverse flow
• Turbine: Single-stage compressor turbine, two-stage power turbine
• Fuel type: Aviation Kerosene, such asJP-4
• Oil system: Pressure spray at 3.1 bar (45 psi)

• Maximum power output:
  

Take-off: 300 kW (400 shp) at 45,000 rpm (gas generator)

Normal: 240 kW (320 shp) at 40,000 rpm (gas generator)

• Overall pressure ratio: 6.05:1 at 45,000 rpm
• Air mass flow: 2.19 kg/s (290 lb/min)
• Turbine inlet temperature: 1,210 K (940 °C)
• Specific fuel consumption: 0.49 kg/kWh (0.8 lb/(hp⋅h))
• Power-to-weight ratio: 2.20 kW/kg (1.34 hp/lb)

Comparable engines

• Allison Model 250

Related lists

• List of aircraft engines

Wikimedia Commons has media related toKlimov GTD-350.

• 1960s turboshaft engines
• Klimov aircraft engines

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