The "'Allison T56 "'is a single shaft, modular design military turboprop with a 14-stage axial flow compressor driven by a four-stage turbine.
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Axial flow compressors produce a continuous flow of compressed gas, and have the benefits of high efficiency and large mass flow rate, particularly in relation to their size and cross-section.
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The basic principle of the engine was similar to the original Whittle engine developed in England, but Westinghouse s use of an axial flow compressor, along with internal combustion chamber, were major advancements that led the way to a practical engine for aviation propulsion . ( Earliest GE jet engines, based on the Whittle design and developed with Allison, featured a centrifugal compressor.
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