Turbomeca Orédon (1947)
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The Turbomeca Orédon was a small French turbo-shaft / Auxiliary Power Unit (APU) engine produced by Turbomeca in the late 1940s.[1]
| Orédon (1947 APU) | |
|---|---|
| Type | turboshaft / Auxiliary Power Unit (APU) |
| National origin | France |
| Manufacturer | Turbomeca |
| First run | 1947 |
| Developed into | Turbomeca Piméné |
Developed as a turbo-shaft / APU derivative of the TR 011 turbojet, the Orédon drove an alternator and was used as an aircraft auxiliary power unit.[2] “Orédon” was reused for a later helicopter turboshaft design.[3][1]
The Turbomeca Piméné, a larger turbojet version of the TR 011 / TT 782 / Orédon, was developed with greater mass-flow and single-stage turbine.[3]
Variants
- Orédon TT 782
- Auxiliary Power Unit similar to the Piméné, but smaller, with the gas generator driving an alternator through a gearbox.[2]
Specifications
Data from Aircraft engines of the World 1953 [4]
General characteristics
- Type: turboshaft / APU
- Length: 870 mm (34 in) without alternator
- Diameter:
- Dry weight: 81 kg (179 lb) with gearbox, 106 kg (234 lb) with alternator
Components
- Compressor: 1-stage centrifugal
- Combustors: single annular combustion chamber with rotary disc fuel injector
- Turbine: 2-stage axial
- Fuel type: kerosene
- Oil system: dry sump with Turbomeca gear pump at 1.4 bar (21 psi)
Performance
- Maximum thrust: ::Max continuous: 0.89 kN (200 lbf) at 34,000 rpm / sea level
- Cruising: 0.78 kN (175 lbf) at 33,000 rpm / sea level
- Overall pressure ratio: 3.44:1
- Air mass flow: 1.25 kg/s (2.8 lb/s) at 35,000 rpm at sea level
- Turbine inlet temperature:
- Before turbine: 850 °C (1,560 °F; 1,120 K)
- After turbine: 700 °C (1,292 °F; 973 K)
- Specific fuel consumption: 0.59 kg/kWh (0.97 lb/(hp⋅h))
- Thrust-to-weight ratio: 2