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, the United States Navy, the United States Coast Guard and the United Kingdom's Royal Air Force and Royal Navy. In U.S. Navy and U.S. Coast Guard service, the helicopter was known as the Sikorsky HNS-1. In British service it was known as the Hoverfly.



The 1st Special Operations Wing (1 SOW) at Hurlburt Field, Florida is one of three United States Air Force active duty Special Operations wings and falls under the Air Force Special Operations Command (AFSOC).

The 1st Special Operations Wing is a successor organization of the 16th Pursuit Group, one of the 15 original combat air groups formed by the Army before World War II.