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The Short S.25 Sunderland was a large four-engined flying boat developed for military use. The design of the S.25 shared much in common with the civil-orientated S.23, principally differing in its use of a deeper hull profile. [12]
Grain Cube (or Grain Capacity) – The maximum space available for cargo measured in cubic metres or feet, the measurement being taken to the inside of the shell plating of the ship or to the outside of the frames and to the top of the beam or underside of the deck plating. It is a measurement of capacity for cargoes such as grain, where the ...
The 1,000th controllable pitch propeller produced by Hamilton Standard with the 1933 Collier Trophy-winning team that designed it Hamilton Standard propeller on Douglas DC-3 of American Airlines Hamilton Standard four-bladed propeller used on a Douglas DC-6. Standard Steel Propeller had been formed in 1918 in Pittsburgh, Pennsylvania, and ...
Kort nozzle The towboat Dolphin I in a floating drydock on the Mississippi River in Algiers, Louisiana. A ducted propeller, also known as a Kort nozzle, is a marine propeller fitted with a non-rotating nozzle. It is used to improve the efficiency of the propeller and is especially used on heavily loaded propellers or propellers with limited ...
The propeller designs were adopted after earlier testing had determined that propeller cavitation caused a drop in efficiency at speeds over 30 kn (56 km/h; 35 mph). The two inner shafts were housed in skegs to smooth the flow of water to the propellers and improve the structural strength of the stern. [66]
de Havilland Propellers was established in 1935, as a division of the de Havilland Aircraft company when that company acquired a licence from the Hamilton Standard company of America for the manufacture of variable-pitch propellers at a cost of about £20,000. [1] [citation needed] Licence negotiations were completed in June 1934.
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