In 1929, the Aviation Department of the Polish War Ministry ordered the prototypes and an airframe for static tests.

The framed fuselage had a skin made of plywood (PWS-11) or aircraft fabric on wood strips (PWS-11bis), except for the engine compartment which was covered with duralumin sheeting.

The rectangular wooden wings had two spars, which were covered with fabric and plywood and were supported by twin struts.

The undercarriage consisted of a fixed common axle conventional landing gear, with a rear skid.

[1] The 9-cylinder Skoda-Wright Whirlwind J-5B air-cooled radial engine was built under licence in the Polish Skoda Works, giving a nominal power of 220 hp (164 kW) and take-off power of 240 hp (179 kW), driving a two-blade fixed pitch wooden propeller.