D-20
Left side view of the Soloviev D-20 engine
Type	Turbofan
Manufacturer	Soloviev Design Bureau
Major applications	Tupolev Tu-124

The Soloviev D-20P, built by the Soloviev Design Bureau, was a low-bypass turbofan engine rated at 52.9 kN (11,900 lbf) thrust used on the Tupolev Tu-124. Elements of the design were used in the development of the larger Soloviev D-30 family of low and medium bypass engines.^[1]

Specifications

Data from Gunston and Jane's.^[2][3]

General characteristics

• Type: Twin-spool turbofan engine
• Length: 330.4 cm (130 in)
• Diameter: 97.6 cm (38.3 in)
• Dry weight: 1,468 kg (3,236 lb)

Components

• Compressor: Three-stage LP, eight-stage HP, axial flow
• Combustors: 12-chamber cannular
• Turbine: Two-stage LP turbine, single-stage HP turbine
• Fuel type: Avtur

Performance

• Maximum thrust: 5,400 kg (11,905 lb)
• Overall pressure ratio: 13:1
• Bypass ratio: 1:1
• Air mass flow: 113 kg/s (249 lb/s) at 8,550 rpm
• Specific fuel consumption: 0.72 (Max take-off) 0.9 (cruise)
• Thrust-to-weight ratio: 3.7