The R-670 (factory designation W-670) was a seven cylinder 4-cycle radial aircraft engine produced by Continental displacing 668 cubic inches and a dry weight of 465lbs. Horsepower varied from 210 to 240 at 2200 rpm. This engine was used on many airplanes in the 1930s and 1940s. The R-670 was widely used in the PT-17 Stearman primary training aircraft of the U.S. military.
In addition to being used in aircraft the R-670 was used in a number of light armored vehicles of World War II.
Specifications (R-670-K)
General characteristics
Type: 7 cylinder air cooled radial
Bore: 130mm (5.125 in)
Stroke: 117mm (4.625 in)
Displacement: 10,9liter (668 cu in)
Length: 792mm (31.187 in)
Width: mm (in)
Height: 1,079mm (42.50 in)
Dry weight: 208kg (460 lbs)
Components
Valvetrain: 1 inlet and 1 exhaust valve per cylinder
