[1][2] The Willie II is a braced single-bay biplane with a fabric covered welded steel fuselage.
[1] The two-spar wooden wings are fabric covered with wide-span ailerons on the lower wing and a fabric covered wired-braced welded steel tail unit.
[1] The prototype is powered by a 180 hp (134 kW) Lycoming O-360-A3A four-cylinder piston engine.
[1] It has two open cockpits in tandem and a fixed conventional landing gear with a tailwheel.
[1] Data from Jane's All the World's Aircraft 1973-74[1]General characteristics Performance