Polyethylene terephthalate
Construction began in June 1970 and was completed in May 1971, with the first flight in June of that year. The wings (of 75 sq. ft.) were constructed of Polyethylene terephthalate (dacron)-covered wood ribs and spars, with full span ailerons. The fuselage was of open (uncovered) 4130 steel tube construction. It had tricycle gear with the main gear steel leaf sprung. The engine was a Volkswagen air-cooled engine with a wooden tractor propeller mounted in line with the wing and above the pilot, similar to a "Demoselle."