Turbine waterwheels. Gas, steam, and water turbines have a casing around the blades that contains and controls the working fluid. Credit for invention of the steam turbine is given both to Anglo-Irish engineer Sir Charles Parsons (1854–1931) for invention of the reaction turbine, and to Swedish engineer Gustaf de Laval (1845–1913) for invention of the impulse turbine. Modern steam turbines frequently employ both reaction and impulse in the same unit, typically varying the degree of reaction and impulse from the blade root to its periphery. The word "turbine" was coined in 1822 by the French mining engineer Claude Burdin from the
Flight engineer engineer ("air engineer" in the Royal Air Force) is primarily concerned with the operation and monitoring of all aircraft systems, and is required to diagnose, and where possible rectify or eliminate, any faults that may arise. On most multi-engine airplanes, the FE sets and adjusts engine power during take off, climb, cruise, go-arounds, or at any time the pilot flying requests a specific power setting to be set during the approach phase. The FE sets and monitors major systems, including fuel, pressurization and air conditioning, hydraulic, electrics (engine driven generators, auxiliary power units), gas turbine compressor/air turbine motor (APU, GTC,