The Rubik R-11b Cimbora (Pal) was a Hungarian two seat glider, first flown in 1940 and intended to introduce B-certificated pilots to aero-towing techniques.

It proved popular and was also used to train pilots in ridge lift flying and set several national duration records.

In 1939 there was a call from the Aeroclub of the fhe Technical University for a two-seat glider on which intermediate level pilots could learn the skills required for aerotowing.

The student's cockpit was under the wing leading edge with a removable cover incorporating a windscreen and the instructor sat under the rear wing in an open cockpit over the centre of gravity (cg) with its own windscreen, accessed via an upwardly hinged upper fuselage section.

The longest in Hungary lasted 25 hr 7 min, flown by Géza Vass and Endre Lacza in August 1948.