The PT-22 is one of a series of militarized versions of the Ryan ST or Sport Trainer, which was introduced to the civil market in 1933. The Recruit was the first metal monoplane primary trainer adopted by the Army Air Corps.
Beginning with the PT-16 and continuing through the PT-20, 21, and 22, each incorporated changes to make them more serviceable for military training. The main changes made to the PT-22 were an engine change to the more powerful Kinner R-540-1, and the removal of the fairings around the landing gear which had proved troublesome for maintenance crews.
U.S. Army Air Corps, 1941
Pima Air & Space Museum