During World War II the radial engine was popular, and it was used in many fighter and bomber aircraft. Manufacturers in aviation used them because the engines deliver a ton of power for their size, ...

If you look at aircraft from the Second World War or earlier, you'll notice that many of them have engines with large frontal areas and cylinders arranged about the propeller crankshaft. This a radial ...

Tether cars are a whole hobby based on tying a string to a tiny motor vehicle, attaching that string to a pole, and letting the car rip around a circle track at extreme speeds. We’ve covered them in ...

For this year's Ultimate Issue, I wanted to push myself out of my comfort zone into an airplane worthy of the Ultimate title. I was inspired by Ernest Gantt's seminal work, Fate Is the Hunter, which ...

Power rating: 74.6 kW (100 hp) at 1,810 rpm Displacement: 6.1 L (372 cu in.) Bore and Stroke: 108 mm (4.3 in.) x 133 mm (5.3 in.) Kinner Motors, Inc. succeeded California’s Kinner Airplane and Motor ...

While Rob Dahm’s garage is no stranger to monstrous rotary engines, including four-rotor units cranking out more than 1,000 horsepower, this one is mind-bending. Here we have a massive, ...