Kinner R-5 was a enlarged B-5
with the bore increased from 4.625 to 5 inches and stroke from 5.25 to
The U.S. Military designation for the Kinner R-5
was the R-540.
|Five cylinder, air-cooled, radial|
|Displacement: 540 cubic inches (8.8 liters)|
|Bore x stroke: 5 x 5.5 inches|