The National Aviation foundation[Notes 1]'s glider training programme progressed with three well defined steps, each using one of Ernö Rubik's designs: the R-07 at the primary stage, followed by the secondary R-08 Pilis and the tertiary, relatively high performance R-12 Kevély.

The pilot sat ahead of the leading edge in a cockpit enclosed by a curved, multi-framed canopy which smoothly followed the fuselage lines.

Large, sliding windows gave good side views and the instrument panel was equipped for cloud flying.

Landings were made on a semi-recessed monowheel, equipped with brakes, just aft of the base of the bracing struts and assisted by skids under the forward fuselage and the tail.

The fin was small but carried a large, roughly quadrantal balanced rudder, hinged far enough aft to clear the elevators.