Boeing T50

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.

JMSDF QH-50D DASH(D-19) T50-BO-12 Engine in JMSDF Kure Museum 20140915
Type Turboprop
National origin United States
Manufacturer Boeing
Major applications QH-50 DASH
Developed into Boeing T60


270 hp (201.34 kW) at 6,000 output rpm, military rating turboprop.[1]
300 hp (223.71 kW) at 5,950 output rpm, revised reduction gear ratio, fuelsystem and other changes.[1]
330 hp (246.08 kW) at 6,000 output rpm[1]
Turboprop, 175 hp (130.50 kW) at 2,900 output rpm max. continuous at sea level.[2]
Compressed air generator.[2]
Turboprop, 210 hp (156.60 kW) at 37,500 compressor rpm for take-off.[2]
Turboprop, 270 hp (201.34 kW) at 37,500 compressor rpm for take-off.[2]
Turboshaft power unit / gas producer
325 hp (242.35 kW) at 3,000 output rpm, variant of -10V / T50-B0-4 with revised reduction gear ratio.[1]
Compressed air generator.[2]


T50 (Model 502)

Specifications (T50-BO-10 / 502-14)

QH-50 05-1526 DD-692
A QH-50D anti-submarine drone aboard the USS Allen M. Sumner (DD-692) in the late 1960s, with the T50 engine visible on the right

Data from Jane's All the World's Aircraft 1962-63.[1]

General characteristics

  • Type: Turboshaft
  • 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


See also

Related development

Related lists



  1. ^ a b c d e Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
  2. ^ a b c d e f Bridgman, Leonard (1955). Jane's all the World's Aircraft 1955-56. London: Jane's all the World's Aircraft Publishing Co. Ltd.
  3. ^ Bridgman, Leonard, ed. (1959). Jane's all the World's Aircraft 1959–60. London: Sampson Low, Marston & Co. Ltd. pp. 521–522.


  • Taylor, John W.R. FRHistS. ARAeS (1962). Jane's All the World's Aircraft 1962-63. London: Sampson, Low, Marston & Co Ltd.
  • Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. p. 79. ISBN 0-7509-4479-X.
  • Leyes II, Richard A.; William A. Fleming (1999). The History of North American Small Gas Turbine Aircraft Engines. Washington, DC: Smithsonian Institution. ISBN 1-56347-332-1.

External links

Battlefield UAVs of the United States

The usefulness of UAVs for aerial reconnaissance was demonstrated to the United States in the Vietnam War. At the same time, early steps were being taken to use them in active combat at sea and on land, but battlefield unmanned aerial vehicles would not come into their own until the 1980s.

Boeing T60

The Boeing T60 (company designation Model 520) was a family of small turboshaft/turboprop engines produced by Boeing, based on Boeing's earlier Model 500 gas generator and Model 502 (T50) turboshaft engines.

Continental T51

The Continental CAE T51 was a small turboshaft engine produced by Continental Aviation and Engineering (CAE) under license from Turbomeca. A development of the Artouste, it was followed by three additional turboshaft engines, the T72, the T65, and the T67. However, none of these engines, including the T51, entered full production. CAE abandoned turboshaft development in 1967 after the XT67 lost to the Pratt & Whitney Canada PT6T (T400) to power the Bell UH-1N Twin Huey.

Gyrodyne QH-50 DASH

The Gyrodyne QH-50 DASH (Drone Anti-Submarine Helicopter) is a small drone helicopter built by Gyrodyne Company of America for use as a long-range anti-submarine weapon on ships that would otherwise be too small to operate a full-sized helicopter. It remained in production until 1969. Several are still used today for various land-based roles.

List of aircraft engines

This is an alphabetical list of aircraft engines by manufacturer.


A turboprop engine is a turbine engine that drives an aircraft propeller.In its simplest form a turboprop consists of an intake, compressor, combustor, turbine, and a propelling nozzle. Air is drawn into the intake and compressed by the compressor. Fuel is then added to the compressed air in the combustor, where the fuel-air mixture then combusts. The hot combustion gases expand through the turbine. Some of the power generated by the turbine is used to drive the compressor. The rest is transmitted through the reduction gearing to the propeller. Further expansion of the gases occurs in the propelling nozzle, where the gases exhaust to atmospheric pressure. The propelling nozzle provides a relatively small proportion of the thrust generated by a turboprop.In contrast to a turbojet, the engine's exhaust gases do not generally contain enough energy to create significant thrust, since almost all of the engine's power is used to drive the propeller.


A turboshaft engine is a form of gas turbine that is optimized to produce shaft power rather than jet thrust.

In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power. They are even more similar to turboprops, with only minor differences, and a single engine is often sold in both forms.

Turboshaft engines are commonly used in applications that require a sustained high power output, high reliability, small size, and light weight. These include helicopters, auxiliary power units, boats and ships, tanks, hovercraft, and stationary equipment.

Boeing aircraft model numbers
Turbine engines


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