Lapwing) or Kocjan Czajka after its designer was a Polish secondary training glider which was in continuous production from 1931 to the start of World War II.

[1] The Czajka was a single-seat, high wing, open frame (uncovered flat girder fuselage) glider.

The first prototype, the first Czajka I, had a totally exposed seat on the lower longeron, its back attached to the forward member of the N-strut.

[4] On the second prototype, the first Czajka II, the seat was enclosed in a simple, removable fabric-covered nacelle which tapered in plan back to the rear N-strut member.

[2] The last prototype, the Czajka III, had a 350 mm (13.8 in) shorter fuselage as well as a span reduced by 1.89 m (6 ft 2 in) and reverted to the exposed seat.

[2][4] In the summer of 1931, only a few months after the type's first flight, the three Czajkas joined the Lwów students on their fifth annual gliding expedition to Bezmiechowa.

[2] Orders for the Czajka came from the government, from LOPP and from individual gliding clubs and production, begun in 1931, only ended with the German invasion of Poland in September 1939.