Top gear was usually direct drive, meaning the transmission's input shaft (which is directly connected to the engine) and its output shaft (which is indirectly connected to the wheels) would spin ...

Jet engines are designed to produce sufficient power to lift the aircraft off the ground and keep it airborne during flight. To achieve this, they must run at very high speeds. The speed of the ...

As interesting as this concept is, it still has a long way to go before reaching production lines, not to mention its applications may be limited ...

Engines sold with long-term service contracts ... and other composite material turbine blades attached to “razors” that spin at thousands of revolutions per minute and regularly heat up ...