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]
Specifications (Prototype)
Data from Jane's All the World's Aircraft 1973-74[1]