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.

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

• Blackburn Iris
• Junkers Ju 52
• Hawker Dantorp
• Hawker Horsley

Specifications (Leopard I)

See also

References

Notes

Bibliography

• Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. .
• Mason, Francis K. Hawker Aircraft since 1920 (third ed.). London: Putnam, 1991. .
• Smith, Herschel. Aircraft Piston Engines. New York, New York: McGraw-Hill, 1981. .