User:The Bushranger/Choppers

The Rotary-winged military aircraft of the United States include a variety of types, designated primarily in two seperate numbering sequences.

In 1962 when the Unified Designation System was adopted, six former Navy and Army types received new designations in the H-1 to H-6 series, which can be found here. However, the original sequence was also continued, and remains in use to the present, with the next designation available being H-73.