Curtiss Conqueror V-1570-53 (G1V-1570-F), V-12 Engine


Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

Glenn Curtiss of Hammondsport, New York, who built and raced bicycles early in the twentieth century, later raced, designed and built motorcycles and motorcycle engines. In 1904, a 5.2 kW (7-hp) Curtiss air-cooled engine powered a small dirigible, his first entry into aviation. Later in that decade, to achieve higher power, Curtiss developed liquid-cooled engines for aviation. A 1931 merger of the two famous aeronautical pioneers formed the Curtiss-Wright Corporation.

The Conqueror was an outgrowth of the famous D-12, which had largely resulted from Curtiss collaborations with Charles B. Kirkham and Arthur Nutt, and was the last of the Curtiss liquid-cooled engine series to enter production. Between 1931 and 1937, 681 Conqueror engines were manufactured with both direct and geared drives that powered high-performance military and racing aircraft. The geared Conqueror G1V-1570-F powered the Douglas YO-31A and C, Douglas XO-35 and Y1O-35, and Douglas Y1O-43.

Collection Item Long Description:


Circa 1928

Inventory Number


Physical Description

  • Type: Reciprocating, 12-cylinders, V-type, liquid-cooled
  • Power: 447 kw (600 hp) at 2,450 rpm
  • Displacement: 25.7 L (1,569 cu in.)
  • Bore and Stroke: 130.2 mm (5.125 in.) x 158.8 mm (6.25 in.)
  • Weight: 460.4 kg (1,015 lb)

Credit Line

Exchange with T. G. Vorhees

Country of Origin

United States of America


Aluminum, Steel, Copper, Magnesium, Rubber, Paint, Brass, Textile


Length 129.5 cm (51 in.), Width 66.0 cm (26 in.), Height 90.64 cm (35. 69 in.)

Data Source

National Air and Space Museum

Restrictions & Rights

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


PROPULSION-Reciprocating & Rotary