Beginning in 1948 the McCulloch Aircraft Corporation produced the MC-4 helicopter, and only a small number were ever built. It was intended for sale to the Navy as the HUM-1, and to the US Army as the YH-30. Due to its limited cargo capacity and short range neither service purchased them for use and the few that were built were sold on the civilian market. This example is the only remaining survivor of the three that the Army evaluated.