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Allison T56: Wikis

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T56 / Model 501
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

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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:

Civilian

Notable applications include:

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

References

External links


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