The wings were wire-braced from structures both above and below the fuselage frame, two transverse V-struts above, leaning together to form a pyramid and two below, joined to a longitudinal member that acted as a shock absorbing landing skid.
[1] The very basic fuselage was just a horizontal, cross-braced wooden girder with the pilot strapped to the longerons[2] at mid-chord and sitting on a bicycle seat held below the wings by wires.
[1] The W.Z.II was built in Zalewski's workshop at Milanówek in only three weeks in the spring of 1912 and flight testing soon began.
Initially, handling was poor but this was cured by stiffening the fuselage with extra wire bracing and by small changes to the vertical tail.
It was launched in that year by two helpers, each with a separate rope and with Zalewski kicking the ground to take off from a hill.