America's First Helicopter Unit -- A helicopter making a ***** the "rolling dack". The U.S. Navy row has a Helicopter Unit - newly ***** on July 1st. At Floyd Bennet Field ***** Air Station, where the unit is stationed, ***** 40 x 60 foot wooden platform, designed to roll ***** and forth while helicopter students simulate landings on a vessel at sea.First Helicopter Unit for the US Navy undergoing tests. The unit is ***** 60 feet wooden platform designed to roll while trainees simulate landing on a vessel at sea. August 24, 1946. (Photo by Acme-British Combine).