05/31/2008. Remarks by Johan Visschedijk: "Škoda-Kauba Flugzeugbau was founded under auspices of the RLM at the suburb Cakowitz of Prague, Czechoslovakia, in the spring of 1942. Director and Chief-Designer was Ing. Otto Kuba, an Austrian engineer from Vienna. The main objective was to design a pilot-less flying bomb, the prototypes would be constructed at the nearby Avia works, a part of the Škoda Werke Trust of Pilsen.

Kauba designed also an extremely clean single-seat fighter trainer, the Sk V4, powered by a 240 hp Argus As 10C-3 eight-cylinder air-cooled inverted V-engine. Impressed by its performance the RLM ordered four prototypes of a more powerful version that was designated Sk 257.

Powered by a 485 hp Argus As 410 twelve-cylinder air-cooled inverted V-engine, the type first flew in 1943."

Span: 24 ft 11.2 in (7.6 m)
Length: 23 ft 3.5 in (7.1 m)
Wing area: 90.42 sq ft (8.4 sq.m)
Max speed: 217 mph (350 kmh)