But despite its ever-increasing popularity, most people still don't understand how the Prius works. Hybrid engine systems are ...

Referred to as "mild hybrids," this setup consists of a small electric motor that works with the engine to add torque and ...

Lewes Ferry’s Cape Henlopen vessel is powered by engines so old that its maintenance team has to scrounge eBay, scrapyards ...

The eMotor can deliver all-electric direct drive at speeds up to 81 mph (130 km/h), says Horse, while in hybrid mode, it works with the ... HR16 and HR18 combustion engines, all named for sub ...

Meanwhile, solid rocket engines are simple and cheap, but once you light them, they’re going full-bore until burnout. Hybrid rocket engines offer perks from both worlds, with simple solid fuel ...