Boeing 502 / T50
QH-50D with T50 engine
The Boeing T50 (company designation Model 502) was a small turboshaft engine produced by Boeing. Based on Boeing's earlier Model 500 gas generator, the T50's main application was in the QH-50 DASH helicopter drone of the 1950s. An up-rated version designated Model 550 was developed to power the QH-50D and was given the military designation T50-BO-12.
270 hp (201.34 kW) at 6,000 output rpm, military rating turboprop.
300 hp (223.71 kW) at 5,950 output rpm, revised reduction gear ratio, fuelsystem and other changes.
330 hp (246.08 kW) at 6,000 output rpm
325 hp (242.35 kW) at 3,000 output rpm, variant of -10V / T50-B0-4 with revised reduction gear ratio.
T50 (Model 502)
Gyrodyne QH-50 DASH
XL-19B Bird Dog
T50-BO-10 / 502-14
Length: 37.2 in (945 mm)
Diameter: 22.5 in (572 mm)
Dry weight: 215 lb (98 kg)
Compressor: Single-stage centrifugal flow
Combustors: 2 can combustors
Turbine: 1x axial gas generator power turbine stage + 1x axial free-power turbine stage
Fuel type: Aviation kerosene
Oil system: pressure spray/splash, oil specification: MIL-L-7808
Maximum power output: 330 hp (246.08 kW) military rating at 6,000 output shaft rpm
Overall pressure ratio: 4.35:1
Turbine inlet temperature: Jet pipe Temperature: 1,140 °F (616 °C)
Specific fuel consumption: 0.87 lb/hp-hr (0.532 kg/kW-hr)
Power-to-weight ratio: 1.535 hp/lb (2.523 kW/kg)