
For a while there, it looked really exciting. The first new engine design to reach production for ages, decades! And it was so simple. It seemed everybody was taking up licences, producing prototype engines, test cars. But as often happens when something seems simple, there was a lot of careful thought and engineering involved – and testing, testing, testing.
And the result was a tiny engine that thrived on revs, put out a phenomenal amount of power for its size, and was unbelievably smooth… but also unbelievably thirsty. And when exhaust emissions became an issue – oops!
Time showed that rotor seals wore out, much more quickly than rings in a piston engine. You didn’t want to be near a rotary with a blown muffler. But while it was running, it looked like the way of the future – provided you could keep it fed.
It broke NSU. Of all the companies that experimented with it, Mazda alone persisted.
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