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Formed in 1906 to first produce automobiles, Rolls-Royce was asked to begin designing and building aircraft engines at the outbreak of World War I in 1914. Using experience from the high-output, liquid-cooled engines of the 1920s and '30s, which the organization helped pioneer, Rolls-Royce began design of the famous Merlin in 1933. Following its similar Kestrel design, the Merlin powered many significant aircraft of World War II, including the Hawker Hurricane, Supermarine Spitfire, and North American P-51.

The most powerful versions of the Merlin developed more horsepower for their displacement than any other World War II production engines. The Packard Motor Car Company and Continental Aircraft built over 58,000 Merlins in the United States under license. Many were shipped to England, and others used in versions of the American Curtiss P-40 and most versions of the P 51. This example of the Packard-built Merlin powered various models of the North American F-6 and P-51 Mustang.

 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 1945 Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Packard Motor Car Company (Detroit, Michigan)
 Designer Rolls-Royce Ltd. (Derby, U.K.)
 Physical Description Type: Reciprocating, 12 cylinders, V-type, liquid cooled Power rating: 1,111 kW (1,490 hp) at 3,000 rpm Displacement: 27 L (1,650 cu in) Bore and Stroke: 137 mm (5.4 in.) x 152 mm (6 in.) Weight: 744 kg (1,640 lb) Dimensions Overall (weight note): 3 ft. 5 5/8 in. × 2 ft. 5 15/16 in. × 7 ft. 3 1/8 in. (105.7 × 76.1 × 221.3cm)
3-D (on steel stand): 274.3 × 111.8 × 147.3cm, 1165.7kg (9 ft. × 3 ft. 8 in. × 4 ft. 10 in., 2570lb.)
3-D (on wood stand): 266.7 × 101.6 × 132.1cm (8 ft. 9 in. × 3 ft. 4 in. × 4 ft. 4 in.)
 Materials Steel
 Inventory Number A19520106000 Credit Line Transferred from the Department of the Navy, Bureau of Aeronautics Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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