The WACO (as in WACO) is short for the Weaver Aircraft Company of Ohio. There were approximately six hundred Waco UPF-7s produced in the United States from 1938 to 1942. The Waco UPF-7 was originally developed as a World War II trainer. Today, fewer than 80 today are still flying, with the majority having found their way to museums. Our UPF-7 was originally purchased by the Civil Aeronautics Administration (CAA) for primary training during WWII.
I had an absolute blast flying in the WACO biplane yesterday. I will do it again sometime (perhaps from Bar Harbor, Maine?? :D)