** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. ** John Browning’s tilting barrel ...

Unveiled in 2015 then confirmed and denied too many times by Mazda’s upper echelons as the RX-9 rotary sports car, the RX-Vision is a bite-the-back-of-your-hand beautiful concept. Four years since it ...

The new and improved always prevails over the old and stale, doesn’t it? Surely the ancient contraption called an internal combustion reciprocating piston engine – a design that is approaching its 150 ...

Despite electrification taking the lead as an alternative source of propulsion, some automakers, including Toyota, Honda, and ...

September 15, 2004There is no other motor as efficient as the Di Pietro Rotary Air Engine. It is 100% more efficient than any other air powered engine built to date and its high torque makes it the ...

Mazda’s famed rotary engine is coming back. The automaker says it’s planning on bringing its rotary engine design for the upcoming MX-30, a hybrid crossover. The rotary will act as a type of generator ...

At the recent 2015 Tokyo Motor Show, Mazda rolled out a stunning sports car concept powered by a rotary engine said to be more fuel efficient than any previous rotary design. Unfortunately, no ...

The rotary engine, with its egg-like block and triangular rotor, is an oddball even among all the other oddball engine designs—sorry, three-cylinder, twin-turbo, camless Koenigsegg, ya basic. That ...

Here is an interesting design concept from designer Mark Miller, the Touchscreen Rotary Phone. The Touchscreen Rotary Phone merges an old design with new technology to bring us this stunning concept ...

Operating companies continually seek new technologies to drill laterals and extended reach wells further, more efficiently and at lower cost. Even with higher oil and gas prices, the challenge to ...