Throughout motorcycle history, there have always been builders who try to push the envelope and do something different. Countless designers have been drawn by the allure of diesel engines and Wankel ...

There are a lot of strange automotive designs out there, but this defunct engine from the '70s may just be the weirdest one ...

Developing a gasoline-powered rotary engine was a dream for Felix Wankel, and we mean that literally. Some steam engines worked on the same basic principle as far back as the 18th century, but the ...