09/30/2014. Remarks by Walter van Tilborg: "William C. Shober of Gaithersburg, Maryland, USA designed this original aerobatic design biplane, which he described as "a two-seat Pitts with a P-51 tail assembly". Shober built and flew the first aircraft in 1970, designated Willie II and registered N7919 (c/n 1), it was powered by a 180 hp Lycoming O-360-A3A engine. The type, suited for engines in the 150 to 200 hp range, was marketed for amateur construction by Shober Aircraft Enterprises, and at least four further aircraft were completed. Further development was halted in 1976 when the type was withdrawn from the market. The pictured N113BT was built by a Mr. Turner and fitted with a Lycoming O-360 engine. According to the FAA register it was completed in 1975 and it received its CofA on June 20, 1980. By September 1992 the aircraft was in collection of the Mid-America Air Museum in Liberal, Kansas. Its registration was cancelled January 30, 2013."