Bore and Stroke: 140 mm (5.51 in.) x 130 mm (5.12 in.) During World War II, the Mitsubishi Army Type 1, Ha 31 Model 21 (Ha 102) powered the Mitsubishi Ki-46-II/II KAI, Army Type 100 command ...

Bore and Stroke: 146 mm (5.75 in.) x 160 mm (6.30 in.) Nakajima provided Japan with its first large radials by building Bristols beginning in the late 1920s. In 1936, Nakajima began building ...

Lockheed's Model 12-A was a twin-engine transport plane that the aerospace firm manufactured between 1936 and 1942. It was designed as a smaller version of Lockheed's 10-A, sitting just over 36 feet ...

Us car guys want to believe our engines are cooler than ones in aircraft, but they're not. I bet that if we grew up flying biplanes instead of family sedans, we'd all be into carbureted radial engines ...

The largest sin the original VW Beetle ever committed was sporting a drivetrain seemingly made of wet paper bags. So to say, it could have been better in the power department. Well, we're not sure ...

When learning about the design of a machine or mechanism, reading and watching videos is certainly effective, but it’s hard to beat hands-on experimentation. In the video after the break, [Brick ...