In the mid-1930s the MSrE (Műegyetemi Sportrepülő Egyesület) or Aero Club of the Technical University decided to build a sailplane capable of thermal, cross country flights.
Both panels shared a single spar which, with plywood skinning forward of it around the leading edge, formed a torsion-resistant D-box.
Parallel chord ailerons, mounted on a light false spar, filled the whole trailing edges of the tapered outer parts and could be lowered together as camber-changing flaps.
[1][2] The sailplane had an roughly oval section, ply-covered fuselage, though the sides met at a sharp, linear keel.
[1] In 1938 visiting RAF Squadron Leader Edward Mole was impressed by its qualities and, after a tow by an Avro Tutor, performed a double bunt or outside loop in it.
These included a distance record of 356 km (221 mi; 192 nmi) in 1942 and the greatest height gain 3,845 m (12,615 ft) in the same year.