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| T56 / Model 501 | |
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| Type | Turboprop |
| National origin | United States |
| Manufacturer | Allison Engine Company Rolls-Royce plc |
| Major applications | C-130 Hercules E-2 Hawkeye P-3 Orion |
| Developed from | Allison T38 |
The Allison T56 is a single shaft, modular design military turboprop with a 14 stage axial flow compressor driven by a four stage turbine. It was originally developed by the Allison Engine Company entering production in 1954, and is now produced under Rolls-Royce which acquired Allison in 1995. The commercial version is designated 501-D. Over 18,000 engines have been produced since 1954, logging over 200 million flying hours.
Contents |
Variants
Commercial
- Series I
- 501-D13,A, D, H
- Series II
- 501-D22
- 501-D36A (non-type certified)
- Series III
- 501-D22A, C, G
Military
- Series I
- T56-A-9D, E
- Series II
- T56-A-7A, B
- T56-A-10WA
- Series III
- T56-A-14, LFE
- T56-A-15, LFE, GFE
- T56-A-16
- T56-A-425
- Series III.V (3.5) A fuel efficient and reliable upgrade to the SIII
- T56-A-14+, LFE
- T56_A-15+, LFE
- T56-A-16+
- T56-A-425+
- Series IV
- T56-A-427
- T56-A-427A Is next for the Advanced Hawkeye
Applications
Military
Notable applications include:
- Lockheed Martin C-130A-H, R, and T Hercules
- Lockheed Martin P-3 Orion
- Northrop Grumman E-2 Hawkeye
- Northrop Grumman C-2 Greyhound
Civilian
Notable applications include:
- Convair 580 and Convair 5800
- Lockheed L100 Hercules
- Lockheed L-188 Electra
- Aero Spacelines Super Guppy
Specifications (T56 Series IV)
General characteristics
- Type: Turboprop
- Length: 146.1 in (3,711 mm)
- Diameter: 27 in (690 mm)
- Dry weight: 1,940 lb (880 kg)
Components
- Compressor: 14 stage axial flow
- Combustors: 6 cylindrical flow-through
- Turbine: 4 stage
- Fuel type: JP8 2412 pounds per hour
- Oil system: 2 systems (1 each for power section and reduction gearbox)
Performance
- Maximum Power output: 4,350 shp (3,915 kW) limited to 4,100
- Overall pressure ratio: 14.5:1
- Turbine inlet temperature: 860 c
- Power-to-weight ratio: 2.75:1 (shp/lb)
References
External links
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