Armstrong Siddeley Leopard

The Armstrong Siddeley Leopard was a British 14-cylinder twin-row air-cooled radial aero engine developed in 1927 by Armstrong Siddeley. It was the most powerful radial engine in the world when introduced.[1]

Leopard
Type Radial engine
National origin United Kingdom
Manufacturer Armstrong Siddeley
First run 1927

Variants
Leopard I
700 hp, medium supercharged. Direct drive propeller.
Leopard II
700 hp, geared epicyclic drive.
Leopard III
800 hp, two-valve cylinder head, direct drive.
Leopard IIIA
800 hp, geared epicyclic drive.

Applications

Specifications (Leopard I)

Data from Lumsden, 2003.[5]

General characteristics

  • Type: 14-cylinder twin-row air-cooled radial engine
  • Bore: 6.0 in (152.4 mm)
  • Stroke: 7.5 in (190.5 mm)
  • Displacement: 2,970 cu in (48.6 L)
  • Length: 60.85 in (1546 mm)
  • Diameter: 58 in (1473 mm)
  • Dry weight: 1,466 lb (665 kg)

Components

  • Valvetrain: Overhead valve, four valves per cylinder
  • Fuel type: Petrol
  • Cooling system: Air-cooled

Performance

gollark: Someone suggested getting programmers from here for a redactor.
gollark: <@137959364320296961> I said that DC was probably spaghetti by now. That's all.
gollark: We do not know.
gollark: It might.
gollark: "We don't care! Add cool stuff!"

See also

Comparable engines

  • Wright R-2600

Related lists

References

Notes
  1. Smith 1981, p.112.
  2. Single engine version only
  3. Mason 1991, p. 140.
  4. Mason 1991, p. 138.
  5. Lumsden 2003, p.69.

Bibliography
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
  • Mason, Francis K. Hawker Aircraft since 1920 (third ed.). London: Putnam, 1991. ISBN 978-0-8517-7839-6.
  • Smith, Herschel. Aircraft Piston Engines. New York, New York: McGraw-Hill, 1981. ISBN 0-07-058472-9.
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