Jet engines work by compressing the incoming air ... A third stream, parasitic airflow (bleed air), passes from the compressor and is used outside the combustion chamber for cooling and ...

Many readers will be familiar with the Dyson Air Multiplier, an ingenious bladeless fan design in which a compressor pushes jets of air from the inside edge of a large ring. This fast-moving air ...

The B-29, one of Boeing's biggest achievements, used one of the earliest versions of an APU that looked similar to a motorcycle engine ... louder when the bleed air is used to heat or cool ...

The Responsive Open Source Engine (ROSE) is designed to be cheap enough that it can be disposable, which has obvious military applications for the Air Force such as small jet-powered drones or ...