Polish single seat motor glider.

Function: tourism, sport flying, won a FAI world record for duration of flight in a Class D motorglider, won a record for altitude, reaching 15,075 ft (4,595 m)

Manufacturer: Warsztaty Szybowcowe

Produced: 1937 –

Wingspan: 12,2 m

Lenght: 6 m

Max. takeoff weight: 325 kg

Max. speed: 152 km/h

Engine: two-cylinder horizontally opposed two-stroke air-cooled engine Kroeber M4 Köller, 13,4kW

Scale motor glider Kocjan Bąk I, built from kit OldGliders PL

Wingspan: 6 m

Lenght: 2,52 m

Engine: Hacker A50-12L V3 brushless motor