Lublin R-XI

The aircraft was developed for a contest for a successor of Junkers F-13 as a light passenger and mail plane in LOT Polish Airlines, announced by the Ministry of Communication.

Its improved development became Lublin R-XVI, built in a small series, although not as a passenger plane.

It had a steel-framed, canvas-covered fuselage (engine part covered with duralumin) and a single-piece, plywood-covered, three-spar elliptical wing of wooden construction.

Two crewmen had twin controls and individual doors on either side, the fifth passenger could be carried instead of the mechanic.

Single engine in front: 9-cylinder air-cooled Polish Skoda Works Wright Whirlwind J-5 radial engine delivering 240 hp (179 kW) take-off power and 220 hp (164 kW) nominal power, with a NACA cowling, driving a two-blade metal propeller of a fixed pitch.