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Noise-generating aircraft propeller. Aircraft noise is noise pollution produced by an aircraft or its components, whether on the ground while parked such as auxiliary power units, while taxiing, on run-up from propeller and jet exhaust, during takeoff, underneath and lateral to departure and arrival paths, over-flying while en route, or during landing.
It includes several components, the most significant of which are wingtip vortices and jet-wash, the rapidly moving gases expelled from a jet engine. Wake turbulence is especially hazardous in the region behind an aircraft in the takeoff or landing phases of flight. During take-off and landing, an aircraft operates at a high angle of attack.
The primary sources of jet noise for a high-speed air jet (meaning when the exhaust velocity exceeds about 100 m/s; 360 km/h; 225 mph) are "jet mixing noise" and, for supersonic flow, shock associated noise. Acoustic sources within the "jet pipe" also contribute to the noise, mainly at lower speeds, which include combustion noise, and sounds ...
Almost 22 years after Concorde made its final commercial flights, a prototype passenger jet has broken the sound barrier during a supersonic test flight.. Boom Supersonic’s XB-1 aircraft climbed ...
This is what it looks like when the Air Force tests its jet engines This chart shows the incredible cost of operating the US Air Force's most expensive planes US general: China's airpower will ...
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In October 1996, a report by UK's Defence Research Agency on the fast jet Collision Warning System Technical Demonstrator Programme (Reference DRAMS/A VS/CR96294/1) reported: "The primary alerting signal from the CWS to the crew was an audible warning passed over the aircraft intercom system. For the first flight these warnings were given in a ...
A United Airlines plane turned back to a Connecticut airport Thursday after a piece of lining from an engine cover fell off during takeoff. A United spokesperson said a portion of the engine’s ...