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.
T50-BO-4270 hp (201.34 kW) at 6,000 output rpm, military rating turboprop.
T50-BO-6T50-BO-8300 hp (223.71 kW) at 5,950 output rpm, revised reduction gear ratio, fuelsystem and other changes.
T50-BO-8AT50-BO-10330 hp (246.08 kW) at 6,000 output rpm
T50-BO-12502-2ETurboprop, 175 hp (130.50 kW) at 2,900 output rpm max. continuous at sea level.
502-7BCompressed air generator.
502-8ATurboshaft.
502-8BTurboprop, 210 hp (156.60 kW) at 37,500 compressor rpm for take-off.
502-10BTurboprop, 270 hp (201.34 kW) at 37,500 compressor rpm for take-off.
502-10C502-10V(T50-BO-4)
502-10VB325 hp (242.35 kW) at 3,000 output rpm, variant of -10V / T50-B0-4 with revised reduction gear ratio.
502-10VC(T50-BO-8)
502-11Compressed air generator.
502-12B502-W502-14(T50-BO-10)
550-1(T50-BO-12)
T50 (Model 502)Gyrodyne QH-50 DASHKaman K-225Kaman HTK-1Kaman K-1125XL-19B Bird DogRadioplane RP-77DGT502Stridsvagn 103Data from Jane's All the World's Aircraft 1962-63.
Type: TurboshaftLength: 37.2 in (945 mm)Diameter: 22.5 in (572 mm)Dry weight: 215 lb (98 kg)Compressor: Single-stage centrifugal flowCombustors: 2 can combustorsTurbine: 1x axial gas generator power turbine stage + 1x axial free-power turbine stageFuel type: Aviation keroseneOil system: pressure spray/splash, oil specification: MIL-L-7808Maximum power output: 330 hp (246.08 kW) military rating at 6,000 output shaft rpmOverall pressure ratio: 4.35:1Air mass flow: (4.1 lb (2 kg))/sTurbine inlet temperature: Jet pipe Temperature: 1,140 °F (616 °C)Specific fuel consumption: 0.87 lb/(hp h) (0.532 kg/(kW h))Power-to-weight ratio: 1.535 hp/lb (2.523 kW/kg) 
