Hispano-Suiza 12X

The Hispano-Suiza 12X was an aircraft piston engine designed in France by Hispano-Suiza during the early 1930s. A 12-cylinder Vee, liquid-cooled design, the 12X was used on several aircraft types, some of them being used in limited numbers during World War II. Due to the 12X's limited power output, its derivative the more powerful Hispano-Suiza 12Y had a longer career.

Variants

Tabulated data from: Lage, 2004

Hispano-Suiza 12Xrs

Applications

Bernard 260
Blériot-SPAD S.510
Dewoitine D.500
Hanriot H.110
Hawker Spanish Fury
Hawker Spanish Osprey
Loire 102
Loire 130
Loire-Nieuport LN.40
Lioré et Olivier H-246
Mitsubishi A5M3a
Morane-Saulnier M.S. 227
Nakajima Ki-12
Potez 540
Potez 650

Specifications (12Xcrs)

Data from

General characteristics

Type: Twelve-cylinder supercharged liquid-cooled 60° Vee piston engine
Bore: 130 mm (5.12 in)
Stroke: 170 mm (6.69 in)
Displacement: 27 L (1,648 in³)
Length: 1,577 mm (62.09 in)
Width: 726 mm (28.58 in)
Height: 904 mm (35.59 in)
Dry weight: 380 kg (838 lb)

Components

Valvetrain: Overhead camshaft with two valves per cylinder
Supercharger: Single-speed centrifugal type supercharger, 10:1 reduction
Fuel system: Six Solex carburetors
Fuel type: 85 octane rating gasoline
Cooling system: Liquid-cooled
Reduction gear: Spur, 2:3

Performance

Power output:
486 kW (651 hp) at 2,600 rpm for takeoff
508 kW (681 hp) at 2,600 rpm at 4,500 m (14,765 ft)
Specific power: 18.81 kW/L (0.41 hp/in³)
Compression ratio: 5.8:1
Specific fuel consumption: 328 g/(kW•h) (0.54 lb/(hp•h))
Oil consumption: 11 g/(kW•h) (0.28 oz/(hp•h))
Power-to-weight ratio: 1.34 kW/kg (0.81 hp/lb)

References

Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière
Lage, Manual (2004). Hispano Suiza in Aeronautics. Warrendale, USA: SAE International. pp. 486–7. ISBN 0-7680-0997-9.

1934 HispanoSuiza J12 Review