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The Allison T56 is an American 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 for the Lockheed C-130 Hercules transport [3] entering production in 1954.
A T56 on a mobile test unit at MCAS Futenma, 1982 T56-A-1 (Series I) A 1,600 lb weight (730 kg) engine delivering 3,460 shp (2,580 kW) and 725 lbf (329 kgf; 3.22 kN) residual jet thrust, which is equal to 3,750 equivalent shp (2,800 kW); single-shaft 14-stage axial flow compressor, cannular combustion chamber with 6-cylindrical through-flow combustion liners, 4-stage axial flow turbine; 13,800 ...
The engines were also sold for marine and stationary applications. In a 1938 reorganization, Winton Engine Corporation became the GM Cleveland Diesel Engine Division, and GM's Detroit Diesel Engine Division began production of smaller (50–149 cu in (0.8–2.4 L) per cylinder) diesel engines. Locomotive engines were moved under the GM Electro ...
Allison also took over GE's axial flow engine design, becoming the Allison J35. The J35 was the primary powerplant for the F-84 Thunderjet and F-89 Scorpion, as well as appearing on numerous prototype designs. The J35 also finished production in 1955, by which point over 14,000 had been delivered.
A variant proposed in 1995 and paired with Dowty R394 propellers to retrofit the Allison T56-powered Lockheed C-130 models E through H and Lockheed L-100-30, at a price after engine/propeller trade-in of USD$11 million per aircraft.
The Navy and Allison signed a formal contract on 2 May 1986, and the first engine to test ran six months after. [7] The T406 is based on the Allison T56 turboprop from the P-3 and the C-130, with the free power turbine of the Allison T701 turboshaft from the defunct Heavy Lift Helicopter program.
Re-designed T40 giving 7,500 shp (5,600 kW) equivalent. After the initial limited success of the T40 the US Navy sponsored development of a new turboprop about 28% larger than the T40, but this work was soon overtaken by the Allison T56 / Allison 501-D and development was cancelled. [1] [4] T56
The Allison T38 (company Model 501) was an early turboprop engine developed by Allison Engine Company during the late 1940s. The T38 became the basis for the very successful family of Allison T56 turboprop engine.