Rebuilt with conventional tail and controls, it won the distance flown prize at the second contest, held in 1925.
[1] The Żabuś was designed for the contest by Captain Franciszek Jach and built in the Pilots' Lower School's workshops at Bydgoszcz.
[1][2] Its rectangular section, plywood-covered fuselage included an open cockpit under the wing and had an unusual profile, like a cambered airfoil with a strongly arched underside.
At the rear there were no vertical surfaces, only a broad chord, triangular tailplane carrying a one-piece, fabric-covered, foot-operated elevator.
After the rebuild the glider had a large, fabric-covered fin and rudder of overall trapezoidal profile, with an appropriately altered control system.