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The T56/Model 501 engine has been used in a number of experimental efforts, and as something other than a turboprop powerplant. In early 1960, two Allison YT56-A-6 experimental turbine engines without propellers were added next to existing propulsion engines on flight tests of a Lockheed NC-130B 58-0712 aircraft.
The Allison T56 turboprop engine has been developed extensively throughout its production run, the many variants are described by the manufacturer as belonging to four main series groups. Initial civil variants (Series I) were designed and produced by the Allison Engine Company as the 501-D and powered the Lockheed C-130 Hercules .
Data from The Instrumentation Design And Control of a T63-A-700 Gas Turbine Engine General characteristics Type: Turboshaft Length: 40.5 in (1,029 mm) Diameter: 22.5 in (572 mm) Dry weight: 138.5 lb (63 kg) dry Components Compressor: 6-stage axial + 1-stage centrifugal compressors Combustors: Single can combustion chamber Turbine: 2-stage axial gas generator power turbine + 2-stage axial free ...
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 (Model 501-D) Successful development of the T40 / T38 with a single power section.
One of Allison's most successful projects is the Model 250 turboshaft/turboprop engine family, which was started by the company in the early 1960s, when helicopters started to be powered by turbine, rather than reciprocating, engines. Allison turbine engines were used to power Bell 206 Jet Ranger and Long Ranger helicopters as well as the ...
On July 11, 1989, Saab-Scania A.B. selected the GMA 2100 to power its new Saab 2000, a 50-seat stretch of the Saab 340 turboprop, in a US$500 million deal. [2] In July 1990, Industri Pesawat Terbang Nusantara (IPTN) of Indonesia picked the GMA 2100 as the engine for the twin-engine N-250 regional airliner. [3]
(Model 504) A projected 9,000 shp (6,711.30 kW) development of the T38 which was cancelled before hardware had been produced. [7] [2] T40 (Model 500) The 4,100 shp (3,057.37 kW) turboprop origin of the T38, [5] composed of two power sections driving a common gearbox. [2] [8] T44 (Model 503) large turboprop with three T38 engine sections. T56
Data from 1966 Aerospace Year Book, page 497 General characteristics Type: Turboprop Length: 160 in (4,100 mm) Diameter: 35 in (890 mm) Dry weight: 1,565 lb (710 kg) Components Compressor: 14-stage with variable geometry vanes Turbine: 4-stage Performance Maximum power output: 4,125 shp (3,076 kW) Overall pressure ratio: 11.7 See also Aviation portal Related development Allison Model 250 -E3 ...