Efficient engines

An Israeli firm called R-Jet Engineering has designed a new jet engine that could lower the fuel consumption by 25%. Just like current jet engines are twice as efficient compared to those built in the 1960s, this one, if applied on commercial airplanes, could offer significant savings in fuel and greenhouse gases.

To reduce emissions and increase fuel economy, hybrid vehicles are a pretty good option that aren't nearly as expensive as pure electric vehicles. In the...

EcoMotors, a Troy, Michigan startup company revitalizes the two-stroke engine, making it 50 percent more efficient than currently-used four-stroke engines and less polluting. Even Bill Gates and Khosla Ventures invested a total of $23.5 million in them.

A better combustion engine is the one recently patented by Revetec, a small company from Australia. Their engine has been tested by independent parties. It has the same power as an ordinary engine, but it consumes half the fuel and it weights 50% less. It's also smaller than the average car engine.

There was a sports car built in 1984 by Craig Henderson and Bill Green from Bellingham, Washington, and at that time it was able to set a record of 103.7 mpg for Guinness Book(in European terms, that's 2.27 liters/100km). Now they're reviving it with the help of the X-Prize Competition.

The Waissi Engine is of an opposed-piston design, much like that being developed by Achates Power or EcoMotors, with one important difference: Waissi's engine...

Typically, even a low-boost small engine turbo can deliver 25% more power than its non-boosted sister. That means that even a tiny turbocharged i3 can...

The Wankel Rotary Engine, of unique design and origins, is the only mass-produced engine to have been conceived in the 20th century, while piston-crankshaft...

While aviation engineers have long known that a “flying wing” aircraft would be more efficient than the traditional tubular fuselage aircraft we see today,...

German car magazine, Auto Test, has named the Mercedes Benz B200 CNG and the ML 250 BlueTec 4Matic as the most environmentally-friendly, giving them...