D. Napier & Son

D. Napier & Son Limited was a British engineering company best known for its luxury motor cars in the Edwardian era and for its aero engines throughout the early to mid-20th century.

Napier was founded as a precision engineering company in 1808 and for nearly a century produced machinery for the financial, print and munitions industries. In the early 20th century it moved for a time into internal combustion engines and road vehicles before turning to aero engines. Its powerful Lion dominated the UK market in the 1920s and the World War Two era Sabre produced 3500 hp (2,600 kW) in its later versions. Many world speed records on land and water, as well as the Hawker Typhoon and Tempest fighter planes, were powered by Napier engines. During World War Two the company was taken over by English Electric and engine manufacture eventually ceased. Today, Napier Turbochargers is a subsidiary of the American company Wabtec.

David Napier, second son of the blacksmith to the Duke of Argyll, was born in 1785. While cousins became shipbuilders, he took engineering training in Scotland before coming to London. There in 1808 he founded the firm that was to become D. Napier & Son in Lloyds Court, St Giles, London. He designed a steam-powered printing press, some of which went to Hansard (the printer and publisher of proceedings of the Houses of Parliament), as well as newspapers. The company moved to Lambeth, South London in 1830.

Between 1840 and 1860, Napier was prosperous, with a well-outfitted factory and between 200 and 300 workers. Napier made a wide variety of products, including a centrifuge for sugar manufacturing, lathes and drills, ammunition-making equipment for the Royal Arsenal, Woolwich, and railway cranes. David's younger son James Murdoch, born 1823, joined the firm in 1837 and became a partner in 1847, resulting in a change in the private company's name to D. Napier & Son.

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