The “Kacha” (Russian: Степанчонок “Кача”) was designed by pilot Vasili Andreyevich Stepanchonok in 1930, during his time as an instructor at the Kacha flight school in Sevastopol.

The “Kacha” was designed as a cantilever high-wing glider. The wing had a double wooden spar structure and was covered with plywood sheets up to the position of the second spar. From there the covering was made of fabric.

The wide, angular fuselage featured a duralumin nose with the rest in plywood-coated wood. The bow area featured a removable aluminum deck. At the rear of the cabin there was another one made of plywood. A towing hook with release system was installed in the first frame of the fuselage.

The landing gear consisted of a central wheel with steel sheet.

The “Kacha” glider was completed in 1930 and his main purpose was to serve as a trainer at the Kacha Higher Flight School. It was presented without great success in the VII National Sailing Competitions, held in 1930 in Koktebel .

Despite the great wing aspect ratio (18.7), the good finish and the excellent construction lines, the flight characteristics of the “Kacha” were quite poor. This was largely due to the poor selection of the TsAGI-311 wing profile, of a high relative thickness and the poor aerodynamic shape of the wide fuselage, with resistance surfaces perpendicular to the air flow.

Kacha
Wingspan: 16.20 m
Wing area: 14.00 m²
Aspect ratio: 18.7
Length: 5.55 m
Empty weight: 150 kg
Wing loading: 16.4 kg / m²
Surface of the horizontal planes: 3.16 m²
Elevator area: 1.74 m²
Rudder surface area: 0.87 m²
Accommodation: 1