We test how accurate a DIY crossbow really is compared to expected performance.

A wild idea turns into an unforgettable race as a team takes on the Red Bull Soapbox Derby with creativity, confidence, and ...

The AES100 turboshaft engine is displayed at a conference in Zhuzhou, Hunan province, on Thursday. CHEN SIHAN/XINHUA Aero Engine Corp of China's new AES100 turboshaft engine, developed for civilian ...

Three of the four RS-25 engines powering the Artemis II mission previously flew on NASA’s Space Shuttle fleet. The engines are cooled by liquid hydrogen to prevent the nozzle from melting from the ...

Scientists are exploring a surprisingly simple way to clean up diesel engines: adding tiny droplets of water to the fuel. During combustion, the water rapidly vaporizes, triggering micro-explosions ...

Inside a diesel engine's cylinder, compressed air raises the temperature to ignite injected fuel, and the resulting force drives pistons to power the vehicle's main gears. Chief to this combustion ...

Piston engine designs have existed since the 1400s. Even Leonardo da Vinci experimented with various designs. And throughout the centuries, engineers have used just about every sort of fuel imaginable ...

Shares of Caterpillar, the maker of mining and construction machinery, are up more than 30% since year-end, making it the biggest contributor to the Dow Jones Industrial Average. WSJ’s Jonathan Weil ...

Modern engines face high failure rates, prompting massive recalls from major automakers. Downsizing, turbochargers, and thin oils increase engine stress and vulnerability to defects. Automakers need ...

Such was the case when Jack Parn and Diego Ugaz. We found them on Instagram going by biy_buildityourself where they had nearly 30,000 followers who liked watching them do cool car stuff. As Parn told ...

The replacement for that engine, though, is anything but ordinary. Stellantis’s new Hurricane 4 uses a few high-tech tricks—unusual in an engine that will be produced by the hundreds of thousands—to ...

How does a 106-year-old company built on diesel engines evolve to thrive in a decarbonized future? Jennifer Rumsey, SM ’98, the chair and CEO at Cummins, is leading the way to answer that question by ...