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.
700 hp, medium supercharged. Direct drive propeller.
700 hp, geared epicyclic drive.
800 hp, two-valve cylinder head, direct drive.
800 hp, geared epicyclic drive.
Junkers Ju 52
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)
Valvetrain: Overhead valve, four valves per cylinder
Fuel type: Petrol
Cooling system: Air-cooled
Power output: 700 hp (522 kW) at 1,650 rpm at sea level
Compression ratio: 5.00:1
Fuel consumption: 45 gal/hr (169 l/hr) at cruise speed
Power-to-weight ratio: 0.47 hp/lb