The Kinner B-5 was a popular five cylinder American radial engine for light general and sport aircraft of the 1930s.

The B-5 was a development of the earlier K-5 with slightly greater power and dimensions.

One difference the B-5 had from radial engines of other manufacturers was that each individual cylinder had its own camshaft, a system also used by the contemporary Soviet-built, 8.6 litre-displacement Shvetsov M-11 five cylinder radial, while most other radial engine designs used a "cam ring" for the same purpose, connected to every cylinder's valves.

The B-5 and its derivatives were produced in the thousands, powering many World War II trainer aircraft; its military designation was R-440.

Data from Jane's all the World's Aircraft 1938[1] Related development