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
Princess Norah (steamship) Princess Norah (steamship) Princess Norah was a steamship which operated in British Columbia and southeastern Alaska from 1929 to 1964. From 1955 to 1958, this ship was called Queen of the North. From 1958 to 1964, the ship was called Canadian Prince. This ship should not be confused with the later similarly named motor ferry MV "Queen of the North". "Princess Norah" was built in 1929 at the Fairfields shipyard in Govan, Scotland. The ship was designed for service to the rugged west coast of Vancouver Island. The ship was 250 feet long, with a beam of 48 feet and