Developed as the YHC-14 in 1958 due an US army 's request for a medium-size turbine powered helicopter, was soon cancelled on behalf of the biggest CH-47 Chinook of the same company.

However, the US marines test a modified version, the Model 107M , that was soon accepted as the HRB-1 and with the normalization of 1961 became in the CH-46

A real workhorse of the US navy and marines since 1965, is primarily used to provide all-weather day or night assault transport of combat troops, supplies and equipment.

It was intended to be replaced by the Bell/Boeing V-22 Osprey.

The model 107 was built with license in Japan by Kawasaki as the KV-107 and is also used in Canada as CH-113 Labrador / Voyageur and Sweden as HKP-4

US marine's CH-46 assault helo

Note the size of the Bell 212 (UH-1N) between the Sea Knights