The first primary glider designed and built by the MSrE (Müegyetemi Sportrepülő Egyesület or in English the Technical University's Sports Flying Group) was the EMESE-B.

Because the nacelle increased the empty weight of the Vöcsök by 20 kg (44 lb) (22%) it needed a 1.2 m (3 ft 11 in) longer span wing with a 13% greater area than the Tücsök.

[1][3] A flat, wooden, diagonally-braced girder formed the fuselage of all R-07s, with a deepened, ply-covered forward lower chord, longeron or keel which supported the wing struts, the pilot's seat and controls and, on its underside, a rubber sprung landing skid.

It was fabric-covered apart from a ply leading edge and carried constant chord elevators separated by a small nick for rudder movement.

[1][2][3] Despite the large number built (c.530 including all variants), remaining in use from 1938 to the early 60s, little is recorded in English about individual examples or their distribution over Hungarian aeroclubs.