Bell H-13 Sioux Airplane Model

Bell H-13 Sioux helicopter model. Initially, the United States Navy procured several Bell 47s, designated HTL-1, between 1947 and 1958. The United States Coast Guard evaluated this model and procured two HTL-1s for multi-mission support in the New York Harbor. The most common U.S. Navy version of the 47 was designated the HTL-4 and dispenses with the fabric covering on the tail boom.