07/31/2009. Remarks by Walter van Tilborg: "The somewhat unconventional Pipsqueak was an original design homebuilt aircraft of Elton L. Patterson and first flew on February 26, 1968, after construction had started in 1963. The single-seat stagger-wing biplane was powered by a 40 hp Volkswagen 1500 engine, and had an enclosed cockpit and retractable gear."