Air engines are a common occurrence here on Hackaday. They’re relatively novel and reasonably easy to 3D print without requiring any fluids or supporting machinery. For example, [Tom Stanton] took a ...
Debuting in 1978, the RX-7 quickly attracted a following with its lightweight body and rare rotary heart. Entering the 1981–1983 FB (Series 2) period, Mazda made practical improvements to the ...
H4 engines are horizontally opposed four-cylinder engines also commonly known by names like flat-four and boxer. For comparison, most four-cylinder automobile engines are upright inline designs. The ...
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