O10 (other)
O10 or O-10 may refer to: * Loening O-10, an amphibious observation aircraft of the United States Army Air Corps * , a submarine of the Royal Netherlands Navy * , a submarine of the United States Navy * O-10, a pay grade in the United States armed forces; see Uniformed services pay grades of the United States Pay grades are used by the eight uniformed services of the United States (Army, Marine Corps, Navy, Air Force, Space Force, Coast Guard, Public Health Service Commissioned Corps, and NOAA Commissioned Officer Corps) to determine wages and benef ...

Loening O-10
The Loening OL, also known as the Loening Amphibian, was an American two-seat amphibious biplane designed by Grover Loening and built by Loening for the United States Army Air Corps and the United States Navy. Design and development First flown in 1923, the OL was a high-performance amphibian with a large single hull and stabilizing floats fitted underneath each lower wing. The landing gear was retractable by use of a hand crank in the cockpit, and the plane was equipped with a tailskid for operations on land. It had a tandem open cockpit for a crew of two. The aircraft could be flown from either cockpit, with a wheel control in the forward cockpit and a removable stick control in the rear. Navigation and engine instruments were located in the forward cockpit. The hull was built of Duralumin on a wooden frame, with five watertight compartments connected through a selector switch to a bilge pump in the rear cockpit. Plugs in the bottom of each compartment permitted drainage o ...
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