Rubik R-23 Gébics

In 1954 the Central Workshop of the Hungarian Aeronautical Association, Dunakeszi (MRSzE) was required to design and build a single seat training glider with pleasant handling characteristics but the performance to take a novice pilot to their C-certificate.

[1] During its design and construction the management of the Dunakeszi workshops changed along with its name, becoming the Alagi Központi Kisérleti Üzem (AKKÜ) (Central Experimental Plant, Alag) in 1955.

Each half-wing was built around a single dural spar at 30% chord, forward of which the wing was dural-covered, with chord-wise corrugations at a pitch of 150 mm (5.91 in), producing a torsion-resistant D-box.

The central structure was a vertical, trapezoidal, U-section frame, its upper part reinforced with welded steel tubes that included attachment points for the wing spar.

The boom was a tapering, circular-section, riveted monocoque structure carrying the Gébics' V-tail, which had parallel chord, forward-swept, metal-covered tailplanes set at 90° to each other.

[1][2][4] After its first flight in June 1957 the Gébics was put through a series of comparative tests with the Cinke (Titmouse), a Hungarian post-war revision of the pre-war DFS Olympia Meise.

The Gébics before modification.