TheBoeing T60 (company designationModel 520) was a family of smallturboshaft/turboprop engines produced byBoeing, based on Boeing's earlier Model 500 gas generator andModel 502 (T50) turboshaft engines.

YT60-BO-2A

Military turboshaft version for testing.

520-2

(YT60-BO-2A) Free power turbine turboshaft rated at 475 hp (354.21 kW)

520-4

Turboprop rated at 475 hp (354.21 kW)

520-6

Direct drive turboshaft rated at 550 hp (410.13 kW) military power

520-8

Turboprop rated at 550 hp (410.13 kW)

Data from Jane's All the World's Aircraft 1962–63^[1]

• Type: Turboshaft
• Length: 54.1 in (1,374 mm)
• Diameter: 25.14 in (639 mm) maximum height
• Dry weight: 250 lb (113 kg)

• Compressor: Single-stage centrifugal flow
• Combustors: 2 reverse flow can combustors
• Turbine: 1x radial gas generator power turbine stage
• Fuel type: Aviation kerosene
• Oil system: pressure spray/splash, oil specification: MIL-L-7808

• Maximum power output: 550 hp (410.13 kW) military rating at 6,000 output shaft rpm
• Overall pressure ratio: 6:1
• Air mass flow: 5.5 lb/s (2 kg/s)
• Turbine inlet temperature:Jet pipe Temperature: 1,025 °F (552 °C)
• Specific fuel consumption: 0.67 lb/(hp h) (0.41 kg/(kW h))
• Power-to-weight ratio: 2.2 hp/lb (3.616 kW/kg)

Related development

• Boeing T50

Related lists

• List of aircraft engines

• 1950s turboshaft engines