Hear the world’s smallest rotary engine up to 30,000 rpm.


Toyan, a company that makes working miniature motors, has made what is claimed to be the world’s smallest rotary motor. Despite its small size, the 0.0024 liter engine can still howl.

Purchased by YouTube channel Warped Perception, which is no stranger to small rotary engines, the tiny Wankel is cleared to roll. But making it work is no small feat.

As the channel points out in its description of the video, it’s extremely difficult to maintain the tight tolerances necessary for an engine to run smoothly when it’s so small. Although the host is impressed that the rotary engine works, it takes considerable effort to make it work.

Read also: The forgotten Rotary champion: remembering the Mazda RX-3 at 50

With an electric starter, it takes the host many tries to start it, and then even more tries to get it running for more than a second or two. But perseverance and a wide open throttle manage to rev the engine long enough for the host to gauge engine rpm.

Impressively, the rotary manages to run for an extended period at around 30,000 rpm. In fact, it managed to run long enough to melt the wire going to the spark plug. And despite its small size, the motor was loud enough to cause ringing in the video host’s ears.

Rated at 0.7 bhp (0.5 kW/0.7 PS), the engine is actually quite powerful. Although it is only 0.18% the size of a Mazda 13B rotary engine, it produces 0.5% of its power. This suggests that if this were the size of the RX7 motor whose rotor is measured against the Toyan rotor in the photo above, it would produce 2.7 times more power.

Still, changes will be made to hopefully squeeze more power and reliability out of it, and it will be featured in future channel videos. If you want one for yourself, you can order it for $499.

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