The other standout feature was the five-cylinder air-cooled radial engine, with a 1,460cc displacement, sitting in the rear compartment right above the wheels. This allowed the car to be compact ...

Radial engines are traditionally made in odd numbers ... SAAB achieved this by putting the cylinder head on hinges. That means that you can play with the amount of space where explosions can ...

[Ian Jimmerson] has constructed a detailed model of a radial engine ... reassembling his engine, explaining in detail how it works as he goes. He starts by teaching about the cylinder numbering ...