After repairing some undercarriage damage and installing another home-made propeller, the Śląsk made its second flight in December 1936.
There were parallel pairs of duralumin bracing struts on each side from the spars to the lower fuselage longerons.
The Anzani engine was mounted with its cylinders projecting for cooling from an aluminium covered, tapered nose.
Its depth was greatest under the wing, where the pilot's shallow-windowed, enclosed cabin under the leading edge was accessed by a hatch in its roof.
Its tailplane was mounted on top of the fuselage and braced from below with V-struts, carrying elevators with a gap for rudder movement.