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N.G.T.E. Pyestock
Early engine testing procedures
These photographs are likely to date from 1952 but could be as late as 1955.

Left : “Testing a compressor, in this case a Proteus unit, driven by an independent source of power”.
Right : “An Avon turbine on test at N.G.T.E.; fed by hot or cold air from a plant compressor, its power output is measured on a dynamometer”.

“Engine performance estimates derived from component tests are checked by installing a complete engine in a flying testbed. Here a Conway bypass turbojet is mounted below the belly of an Ashton flying testbed”.

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