Wait! Don't say anything. Okay—they're gone. I didn't want those guys to hear what we were saying about them. Who? The people who flipped past this article without reading it, of course! You see, ...

As shown in a previous “Swimming Technique Concepts” article (SW June 2021), when swimming velocity increases, the time of all four stroke cycle phases decreases. Conversely, swimmers decrease the ...

When we think of a typical four stroke internal combustion engine, we think of metal. And for any type of longevity or performance, that’s certainly the right choice. But [Integza] wanted to see what ...

A few weeks ago, news broke that Porsche had patented a new six-stroke engine. They claim it delivers the power of a two-stroke but the durability and emissions of a four-stroke. As you know, the ...