08/12/2006. Remarks by David Hatcher: "Designated as YHU-1D-BF Iroquois, seven were ordered for evaluation by the US Army in FY 1960. It was first flown on August 16, 1961. In 1962 the Army changed the designation to YUH-1D; the first delivery was made in August 1963. The well known nickname "Huey" was derived from the HU-1 designation.

This helicopter (the third prototype) was 'borrowed' by Bell for a company funded project and re-engined with two Continental XT67-T-1 turboshaft engines with a total output of 1,400 shp driving a common gearbox. The experimental craft flew for the first time on April 29, 1965 and was FAA certified as the Model 208.

After the project it was returned to the single-engine configuration and returned to the US Army. Bell did not pursue the Continental engine but went with the Pratt and Whitney PT6 configuration, with a little help with funding from the Canadian government.

It is displayed in the center of the main exhibition hall of the Army Aviation Museum in a diorama based on a popular photo of a UH1D making a combat assault landing in Vietnam."