In 1899, the French-manufactured De Dion-Bouton engine powered a tri-cycle vehicle (three-wheel motorcycle) built by the same manufacturer. The higher speed, made possible by timed ignition, and air cooling of this type of engine made it more powerful for its size and weight than earlier automotive engines. Therefore, it was particularly useful for aviation applications, but originally too small for airplanes. However, the small engines were satisfactory for airships, and De Dion-Bouton engines powered Santos-Dumont’s No. 1 and No. 2 dirigibles.
In 1900, Dr. Samuel P. Langley, Secretary of the Smithsonian Institution, purchased this one-cylinder, air-cooled engine from the De Dion-Bouton firm in Paris. The artifact was taken apart, examined, and tested. Charles M. Manly, Langley's engineer, incorporated two features of the engine, namely the lightweight pistons and the ignition system, in his engine. Manly's design became the Langley-Manly-Balzer engine which powered Langley's 1903 Aerodrome.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
CIrca 1900
Country of Origin
France
Type
PROPULSION-Reciprocating & Rotary
Manufacturer
De Dion-Bouton Motorette Company (Puteaux, France)
Physical Description
Type: Reciprocating, 1 cylinder, air-cooled
Power rating: 1.9 kW (2.5 hp) at 1,800 rpm
Displacement: Not available
Bore: 8.9 mm (3.5 in.) (approximate)
Weight: Not available
Dimensions
Storage (Rehoused on an aluminum pallet with 3 additional objects): 121.9 × 121.9 × 76.2cm, 145.2kg (48 × 48 × 30 in., 320lb.)
Materials
Steel, Paint, Preservative coating, Aluminum, Phenolic
Inventory Number
A19390063000
Credit Line
Deposit from Smithsonian Institution
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
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