The Škoda-Kauba Flugzeugbau produced the Škoda-Kauba V4 as a single-seat low-wing cantilever monoplane powered by a 240 hp (179 kW) Argus As 10C-3 engine with a retractable tailwheel landing gear. First flying in 1943, the first prototype proved very fast for its low power. The second included a number of changes and, despite increased power, was not as fast. A third was also completed.
The SK V4 fighter trainer was the only Otto Kauba design put in to production as the SK 227. The production was somewhat limited though.
The potential for development was recognized and the German Reichsluftfahrtministerium ordered four prototypes of an enlarged aircraft with a more powerful 485 hp Argus As 410 engine and allocated the designation Sk 257. The four prototypes performed well and the type was ordered into production but the build quality of the prototypes did not pass the Luftwaffe quality control inspections and after only five production aircraft had been built the order was cancelled.
The SK257 development received a German production order and five were completed before the Russians captured the factory.
SK V4
Engine: 1 x 240hp Argus As 10C-3
Max take-off weight: 1250 kg / 2756 lb
Wingspan: 7.60 m / 24 ft 11 in
Length: 5.60 m / 18 ft 4 in
Height: 2.90 m / 9 ft 6 in
Max. speed: 420 km/h / 261 mph
Ceiling: 7500 m / 24600 ft
Range: 900 km / 559 miles
Crew: 1
SK 257
Engine: 1 × Argus As 410 362 kW (485 hp)
Wingspan: 7.6 m (24 ft 11 in)
Wing area: 8.4 m2 (90 sq ft)
Length: 7.1 m (23 ft 4 in)
Maximum speed: 350 km/h (217 mph, 189 kn)
Crew: 1
All Aero 