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Curtiss B-8

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This object is on display in the Early Flight exhibition at the National Mall building.


The Curtiss Model B-8 was the first Curtiss engine to power a heavier-than-air machine in sustained flight. In 1908, the 40 hp B-8 powered the Curtiss June Bug aircraft. In 1911, this engine was used by the donor’s father, Dr. George A. Spratt, to power an experimental variable angle of incidence wing seaplane of his own design.

Although this engine is air cooled, all Curtiss engines manufactured after 1908 were water cooled.

Gift of George Spratt.

Manufacturer: Curtiss Aeroplane and Motor Company

Designer: Glenn H. Curtiss

Date: 1907

Country of Origin: United States of America

Physical Description:Type: Reciprocating, V-type, 8 cylinders, air-cooled Power rating: 29.8 kW (40 hp) at 1,800 rpm Displacement: 4.393 L (268 cu in) Bore and Stroke: 92.08 mm (3.625 in) x 82.55 mm (3.25 in) Weight: 68.1 kg (150 lb)

Inventory number: A19490009000

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