I'm Way Cooler, WACO T-Shirt

The 'F' series was popular with private owner pilots for sporting and other uses and continued in production through the late 1930s. The tandem cockpit UPF-7 version was adopted by the Civilian Pilot Training Program and continued to be built in numbers (over 600) until 1942. The YMF of 1934, which had a modified wider and longer fuselage, was returned to production in March 1986 by WACO Classic Aircraft of Lansing Michigan as the YMF-5. Over 100 YMF-5s have been completed by WACO Classic Aircraft and the type remains in low-rate production. Considerable numbers of 'F' series biplanes, both original and newly built, remained in service in mid-2009.