The Clerget 9B was a nine-cylinder rotary aircraft engine of the World War I era designed by Pierre Clerget.
Type: Nine-cylinder air-cooled rotary engine
Bore: 120 mm (4.72 in)
Stroke: 9B: 160 mm (6.30 in)
Displacement: 9B: 16.29 l (994.08 cu in)
Length: 920 mm (36.22 in)
Diameter: 9B: 1,020 mm (40.15 in)
Dry weight: 173 kg (381 lb)
Engine is located in Krakow Aviation Museum