YR-4B
The Sikorsky R-4 is a two-seat helicopter that was designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine. The R-4 was the world's first large-scale mass-produced helicopter and the first helicopter used by the United States Army Air Forces,"Sikorsky R-4B Hoverfly"
''National Museum of the United States Air Force''. Retrieved: 25 July 2016. the , the and the

Carter Harman
Carter Harman (June 4, 1918; Brooklyn, New York – January 23, 2007; Stowe, Vermont) was a composer, writer, and music industry executive. During World War II, Harman achieved particular distinction for his service in the U.S. Army Air Forces. He piloted the first mission by a U.S. military helicopter in a combat zone in 1944. In 1945, the U.S. Army awarded him the Distinguished Flying Cross for these efforts. Harman later rendered service to the music industry over a career spanning the 1940s through the 1980s. In 1981, BMI awarded him their Commendation of Excellence, and the American Composers Alliance awarded him their Laurel Leaf Award. Early life and education Harman was born in the New York City Borough of Brooklyn on June 4, 1918. He began musical studies at age nine by learning how to play the clarinet. After graduating from the Morristown School (now Morristown-Beard School) in Morristown, New Jersey, Harman received his bachelor's degree with high honors from Princet ...
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Medical Evacuation
Medical evacuation, often shortened to medevac or medivac, is the timely and efficient movement and en route care provided by medical personnel to wounded being evacuated from a battlefield, to injured patients being evacuated from the scene of an accident to receiving medical facilities, or to patients at a rural hospital requiring urgent care at a better-equipped facility using medically equipped air ambulances, especially helicopters. Examples include civilian EMS vehicles, civilian aeromedical helicopter services, and military air ambulances. This term also covers the transfer of patients from the battlefield to a treatment facility or from one treatment facility to another by medical personnel, such as from a local hospital to a trauma center. History The first medical transport by air was recorded in Serbia in the autumn of 1915 during First World War. One of the ill soldiers in that first medical transport was Milan Rastislav Štefánik, a Slovak pilot-volunteer who was ...
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