Rolls-Royce Condor IA, 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:

Following its success as an automobile manufacturer, Rolls-Royce, Ltd. began design and development of aircraft engines at the request of the British Admiralty at the beginning of World War I. The Rolls-Royce Condor was a large and very powerful engine developed at the end of the war in 1918 for use in long-range heavy bombers, principally for bombing Berlin, Germany. Design work was begun at the end of 1917 and retained the same cylinder construction of earlier types. A total of 327 Condors were recorded as having been built.

The Condor Mk IA (also referred to as the Condor II) was built in 1921. It succeeded the Mk I and incorporated several design changes, increasing the power and speed. Only 34 of these engines were built by Rolls-Royce at Derby. The Condor Mk IA powered the Beardmore BeRo.1 Inflexible, Fairey N.4 Atalanta, and the Hawker Horsley aircraft.

Collection Item Long Description:

Data Source

National Air and Space Museum

Restrictions & Rights

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

Credit Line

Transferred from the War Department, Air Corps, Materiel Division, Wright Field, Dayton, Ohio


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


Height 106.7 cm (42 in.), Width 83.8 cm (33 in.), Depth 180.3 cm (71 in.)

Country of Origin

United Kingdom



Physical Description

  • Type: Reciprocating, 12 cylinders, V-type, water cooled
  • Power rating: 485 kW (650 hp) at 1,900 rpm
  • Displacement: 35 L (2,138 cu in.)
  • Bore and Stroke: 140 mm (5.5 in.) x 191 mm (7.5 in.)
  • Weight: 591 kg (1,300 lb)


PROPULSION-Reciprocating & Rotary

Inventory Number