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, 2004Lage, 2004, p.486-7

+ Type 72 Hispano-Suiza 12X engines. V-12, bore=130 mm, stroke=170 mm, capacity=27.0 litres. Model Year Compression Power (hp) @ r.p.m. T-O power (hp) Output reduction Supercharger optimum altitude (m) Weight (kg) Comments 12Xbr (500 hp) 1932 6.4 610 2,200 610 1.5 0 355 Unsupercharged. Rated power (500 hp) less than nominal 610 hp12Xbrs (500 hp) 1932 5.8 650 2,650 600 1.5 4,000 370 Rated power (500 hp) less than nominal 650 hp12Xbrg (500 hp) 1932 5.8 715 2,650 670 1.5 2,000 370 Rated power (500 hp) less than nominal 650 hp12Xbr (600 hp) 1934 6.4 600 2,200 630 1.5 355 For this and all later entries in both tables, Rated power = Nominal power = Power12Xbrs (690 hp) 1934 5.8 690 2,600 660 1.5 4,500 370 12Xbrs1 (720 hp) 1934 5.8 720 2,600 704 1.5 2,750 370 12Xdrs 1935 5.8 690 2,600 670 1.5 4,000 370 Left handed12Xfrs 1935 5.8 690 2,600 670 1.5 4,000 370 Right handed12Xgrs 1935 5.8 690 2,600 670 1.5 4,000 370 Hamilton propeller, right handed12Xgrs1 1937 5.8 720 2,600 1.5 2,100 370 Hamilton propeller, right handed12Xhrs 1935 5.8 690 2,600 670 1.5 4,000 370 Hamilton propeller, left handed12Xhrs1 1937 5.8 720 2,600 1.5 2,100 370 Hamilton propeller, left handed12Xirs 1935 5.8 690 2,600 670 1.5 4,000 370 Flat flange propeller, left handed12Xjrs 1935 5.8 690 2,600 670 1.5 4,000 370 Flat flange propeller, right handed

+ Type 76 Hispano-Suiza 12X engines with 20 mm calibre Hispano-Suiza 404 cannon between cylinder banks, firing through propeller shaft. Cylinder dimensions as Type 73. Model Year Compression Power (hp) @ r.p.m. T-O power (hp) Output reduction Supercharger optimum altitude (m) Weight (kg) Comments 12Xcrs (690 hp) 1934 5.8 690 2,600 660 1.5 4,500 380 12Xers 1934 5.8 690 2,600 660 1.5 4,500 380 Variable-pitch propeller12Xirs 1937 5.8 690 2,600 660 1.5 3,900 385 Left handed12Xjrs 1937 5.8 690 2,600 660 1.5 3,900 385 Right handed12Xirs1 1937 5.8 720 2,600 738 1.5 2,100 385 Left handed12Xjrs1 1937 5.8 720 2,600 738 1.5 2,100 385 Right handed12X 13 1937 690 2,600 738 1.5 3,900 371

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)

See also

References

Danel, Raymond and Cuny, Jean. L'aviation française de bombardement et de renseignement 1918-1940 Docavia n°12, Editions Larivière