Armstrong Siddeley Lynx
The Armstrong Siddeley Lynx was a piston engine of the British manufacturer Armstrong Siddeley, for military as well as civilian use. The 1920 already presented air-cooled seven-cylinder OHV radial engine was installed in a number of well-known British aircraft such as the Avro 504N, O, Q and R, or Airspeed Courier AS.5A. The Lynx corresponded in dimensions and construction and two years later brought out 14 - cylinder radial engine Armstrong Siddeley Jaguar.
The first version of the Lynx still had a square bore - stroke ratio, each having 127 mm, giving a capacity of 11 liters. From the Lynx Mk I at the stroke was increased to 139.7 mm, whereby the engine capacity grew to 12.4 liters. The performance was continuously increased from the original 150 to eventually 240 hp ( Mk.IV C). The first engines had even cast aluminum pistons, which were later replaced with forged. The cylinder with its cooling fins were made of steel, the aluminum cylinder heads. Each had a one and one exhaust valve. For all the Lynx propellers were driven directly to the Lynx version IV (G ), which had a reduction gear with the ratio i = 1.522. This engine was used exclusively in the Blackburn F.2 Lincock II.
The Lynx remained until 1939 in production. In total, over 6,000 engines of this type were produced. A production license was awarded to Alfa Romeo.