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Synchro-Soft C-130 Soundset

C-130s are powered by four 4,190-horsepower Allison turbo-prop engines(T56), 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 some 200 million flying hours.

General characteristics:

Type: Turboprop
Length: 146.1 in (3,711 mm)
Diameter: 27 in (690 mm)
Dry weight: 1,940 lb (880 kg)
Performance:

Power output: 5,350 shp (3,915 kW) limited to 5,100
Overall pressure ratio: 14.5:1
Turbine inlet temperature: 860 c
Power-to-weight ratio: 2.75:1 (shp/lb)