Converting the ignition of a fuel-air mixture into usable mechanical energy lies at the core of a dizzying number of internal ...

More an ancient tool than a groundbreaking gadget, the fire piston relies on basic chemistry to ignite a campfire with the simple pump of a hand. The new Aviator's Ember from Aerohart applies ...

An engine's displacement dictates power output based on the bore and stroke, while compression ratio influences how strong ...