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Bates Model 2B 2-Cylinder Opposed

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This object is on display in the Boeing Aviation Hangar at the Steven F. Udvar-Hazy Center.


This engine was manufactured by the Bates Engineering Company of Chicago, Illinois, about 1910. It is believed to be a 19 kW (25 shp) Model 2 B. The engine had automatic intake valves and mechanically actuated exhaust valves.

Matthew B. Sellers, builder of the first Kentucky-manufactured aircraft, flew his first quadraplane from 1908 to 1913 powered by various 2-cylinder, horizontally-opposed engines. This Bates Model 2 B was one of these engines.

Gift of Matthew Bacon Sellers, Jr. and John Sellers.

Manufacturer: Bates Engineering Company

Date: 1910

Country of Origin: United States of America

Dimensions: Hub Depth: 5.2 cm (2.0625 in.), Shaft Hole Diameter: 4.4 cm (1.75 in.), Bolt Hole Diameter: 0.6 cm (0.25 in.), Hub Diameter: 11.7 cm (4.625 in.), Propeller Diameter: 56.1875 in. (142.7 cm)

Materials: Engine Case - Aluminum Propeller Blade - Wood

Physical Description:Type: Reciprocating, Horizontally-opposed, 2 cylinders, air-cooled Power: 19 kW (25 hp) at 1,200 rpm

Inventory number: A19690248000

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