The KZ-IX was never built. It was a two-seater trainer designed to take over from the KZ-II. It was similar in appearance to the Hunting Pervical Provost.

The designation KZ-IX was later re-used for a replica of the Ellehammer Standard Monoplane.

Specifications:

Construction: Metal covered welded steel tubing.
Wingspan: 12.0 m
Length: 9.3 m
Height: 2.9 m
Wing Area: 25.0 m2
Weight Wet: 1900 kg
Max Speed: 280 km/h
Cruise Speed: 244 km/h
Landing Speed: 90 km/h
Range: 3 hours
Ceiling: unknown
Number Build: none