Strictly speaking this aircraft should be designated the American Aircraft Airster S-1B, but the fact that it was evolved from the earlier Security Airster S-1A has meant that over the years both versions have been known as Security types. The Security National Aircraft Corporation of California was formed in 1933 by W.B. Kinner to build the Airster S-1A (15 built) which he had designed. It was first flown in 1933 powered by a 100hp(75kW) Kinner but it met with little success and production ended in 1935. The company was restarted in 1939 under the name American Aircraft Co. and began construction of the more powerful Airster S-1B. The company ceased trading in 1942 and only one Model S-1B remains extant and is believed to be maintained in airworthy condition.

NC13702                    c/n 11                        USA

2 seat light aircraft first flown in 1939