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A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [1] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various ...
Bourne Field was a US Marine Corps Air Facility (MCAF) located on St. Thomas, a part of the US Virgin Islands. Throughout its service, it was known as Navy Operating Base, St. Thomas, MCAS St. Thomas, and MCAF St. Thomas, Virgin Islands. The previously civilian airstrip was acquired by the US government and operated as a military base between ...
Aviation first arrived at Quantico on 6 May 1896 when Dr. Samuel Pierpont Langley (1834–1906), Astronomer and third Secretary of the Smithsonian Institution, launched his successful Aerodrome #5, a steam engine powered, unpiloted aircraft from a houseboat in the shadow of Chopawamsic Island adjacent to the present-day approach end of Runway 20 at Quantico Marine Corps Air Facility.
Marine Air Traffic Control Units (MATCU) were air traffic control (ATC) detachments that provided continuous, all-weather, radar and non-radar, approach, departure, enroute, and tower ATC services at both garrison Marine Corps Air Stations and tactical airfields when deployed.
On 13 March 1985, MCAF Pendleton was re-designated as Marine Corps Air Station effective 1 April 1985. Today, the Air Station supports over 180 helicopters assigned to MAG-39, Marine Aircraft Group 46 Detachment A, and a wide variety of other Marine Corps units and visiting aircraft from other branches of the Armed Forces.
A simple one-way ball-type check valve, in its "open" state acts as a diode in its conducting state. A pressure-actuated valve combined with a one-way check valve acts as a (field-effect) transistor. Like a one-way check valve, a diode blocks current that flows the wrong way.
On 15 January 1952, the U.S. Marine Corps recommissioned the idle airfield Marine Corps Air Station Kaneohe Bay, making it an ideal training site for a combined air/ground team. [8] Station Operations and Headquarters Squadron supported flight operations until 30 June 1972, when Station Operations and Maintenance Squadron (SOMS) was ...
It was named "Marine Corps Air Station, Santa Ana" in 1966 and renamed Marine Corps Air Station Tustin in 1979. During the Vietnam War , the base was a center for on-going testing of radar installations (including the Sperry TPS-34) which were erected, tested, disassembled and shipped to South Vietnam .