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Elbridge Featherweight, In-line 3 Engine


Display Status:

This object is on display in the Early Flight exhibition at the National Air and Space Museum in Washington, DC.

Collection Item Summary:

The Elbridge Engine Company of Rochester, New York built light-weight, two-cycle marine engines. Several were sold to builders of aircraft such as Curtiss and Farman types between 1908 and 1910. In particular, they were used by flying schools to teach amateur pilots.

Two cycle engines were not used very long because of high fuel consumption, and were replaced by reliable four-cycle engines within a few years. Elbridge engines were unique in having an unlimited warranty on manufacturing defects.

Collection Item Long Description:

Data Source

National Air and Space Museum


Do not reproduce without permission from the Smithsonian Institution, National Air and Space Museum


Elbridge Engine Company (Rochester, New York)

Credit Line

Gift of William D. Parker.




  • 3-D: 81.3 × 31.8 × 51.4cm, 68kg (32 × 12 1/2 × 20 1/4 in., 150lb.)
  • Support: 69.9 × 71.1 × 54.6cm (27 1/2 in. × 28 in. × 21 1/2 in.)

See more items in

National Air and Space Museum Collection

Country of Origin

United States of America



Physical Description

  • Type: Reciprocating, In-line, 3 cylinders, water-cooled, two-stroke cycle
  • Horsepower: 22 - 34 kW (30 - 45 hp) at 1,400 rpm
  • Displacement: 3.70 L (226 cu in)
  • Bore and Stroke: 117.48 mm (4.625 in) x 114.30 mm (4.5 in)
  • Weight (wet): 68.1 kg (150 lb)


PROPULSION-Reciprocating & Rotary

Inventory Number