Wright R-3350 TC18 Fluid Coupling Explained

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A description of the design and function of the fluid coupling used to transmit power from the Power Recovery Turbine (PRT) to the crankshaft of the Wright Turbocompound engine.
Regarding the reliability issue mentioned in the AEHS story, my father flew Connies and DC-7's for Eastern Air Lines and never mentioned any specific engine problems other than noting that the PRT bucket was armor plated so when the turbine disintegrated all the shrapnel would go in a controlled direction. Eastern's policy was to only use low blower and they claimed that improved engine life. It also meant that flying NY-MIA, they could look up and see National Airlines high above them.

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