Hispano-Suiza 12Y 

The Hispano-Suiza 12Y was an aircraft engine produced by Hispano-Suiza for the French Air Force before the Second World War. The 12Y became the primary French 1,000 hp (750 kW) class engine and was used in a number of famous aircraft, including the Morane-Saulnier M.S.406 and Dewoitine D.520.

Its design was based on the earlier, and somewhat smaller, 12X. The 12X did not see widespread use before the 12Y replaced it and became one of the most powerful French designs on the eve of the war. The 12Z was being designed but this was ended by the fall of France and the German occupation.

The 12Y was produced under Hispano-Suiza licence in the Soviet Union as the Klimov M-100. This design led to the highly successful Klimov VK-105 series that powered the Yakovlev and Lavochkin fighters as well as the Petlyakov Pe-2 bomber. Licensed production of the early models was also undertaken in Czechoslovakia as the Avia HS 12Ydrs and in Switzerland as the HS-77.

Country: France

First run: 1932

Displacement: 36 L (2,197 cu in)

Length: 2,137 mm (84.3 in)

Width: 764 mm (29.9 in)

Height: 945 mm (37 in)

Fuel system: 6 Solex 56 S.V.C carburetors

Fuel type: 87 octane rating gasoline

Cooling system: Pressurised, liquid-cooled

Power: 1,100 HP (820 kW)

Compression ratio: 7:1

Weight: 492 kg (1,085 lb)

Bourget Museum (ParisFrance)

Read more: History of engines with Martin Perez ...