During 1917 and 1918, the water-cooled Curtiss K-6 (Kirkham-6) was designed under the direction of Charles B. Kirkham, an associate of Curtiss for a number of years who became the company’s Chief Engineer.

 

Following the K-12, a Curtiss competitor for the highly successful Hispano-Suiza engine, the K-6 was introduced as a six-cylinder vertical direct-drive engine using the same cylinder block and the same crankshaft dimensions. Closely following the design of the K-12, the K-6 used K-12 parts wherever possible. Three K-6 engines powered the 1919 tri-motor Curtiss Eagle II airliner.

 

Power rating: 112 kW (150 hp) at 1,700 rpm

Displacement: 9.38 L (572.54 cu in)

Bore and Stroke: 114 mm (4.5 in.) x 152 mm (6 in.)

Weight: 189.1 kg (417 lb)

Height 119.4 cm (47 in.)

Width 81.3 cm (32 in.)

Depth 168.9 cm (66.5 in.)