Sikorsky R-4 Sikorsky R-4 The Sikorsky R-4 is a two-seat helicopter 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 VS-316 was developed from the famous experimental VS-300 helicopter,
Sikorsky Memorial Airport The airport was originally Avon Field, a racetrack where aircraft landed on the grass infield. It was the site of the country's first air show held in 1911, on the grounds of what is now St. Michaels Cemetery. It became known as Mollison Field after Captain Jim Mollison's crash landing there in 1933 during an attempt to fly across the Atlantic. The City of Bridgeport purchased the airport in 1937, after which it became Bridgeport Municipal Airport. In 1972 it was rededicated as the Igor I. Sikorsky Memorial Airport, honoring the airport's most famous tenant, Igor Sikorsky, who selected Stratford