The Year of '47

The years aircraft: The Armstrong Whitworth A.W.52

May   The Royal Navy forms its first all-helicopter squadron, No. 705 Squadron, which serves as the Fleet Air Arm's Helicopter Fleet Requirements Unit at Gosport

June 24 – Kenneth Arnold is piloting a CallAir A-2 at about 9,200 feet (2,804 m) near Mineral, Washington, when he sights what he reports to be a group of disc-like unidentified flying objects flying in a chain which he clocks at a minimum of 1,200 mph (1,932 km/hr). He refers to them as looking like saucers, leading the press to coin the term "flying saucer," which soon enters everyday speech.