Fifteen years ago, he envisioned an extreme Wankel engine with twelve rotors arranged in a Y configuration. The idea was to power his big-block Chevy-based speedboat with something far more exotic.

Rob Dahm, notorious rotary-powered car builder, has firmly jumped into the deep end of the pool with his latest project: The world's only 15.7-liter, tri-turbo Y12 rotary engine. If that doesn't ...

The top disk is vacuum infused with the addition of recycled PET foam core for stiffness and strength. What is the reason behind the use of these specific materials? “Rotor sails operate at hundreds ...