Perceval said:
lucasraffablog said:
What I mean is that the aviation industry is being perfected year after year. There are more and more flights and less accidents. So, accidents by "regular" climates conditions are unusual today.
Agreed. Which suggests we are dealing with some rather "irregular" climate conditions with the Airasia crash. Then again, the climate has become increasing irregular all over the world in recent years.
Jet stream blasts BA plane across Atlantic in record time
_http://www.telegraph.co.uk/news/worldnews/northamerica/usa/11337617/Jet-stream-blasts-BA-plane-across-Atlantic-in-record-time.html
Sat. Jan. 10, 2015 Concorde may have been retired but a British Airways passenger jet approached supersonic speed this week as it rode a surging jet stream from New York to London.
The Boeing 777-200 jet reached a ground speed of 745mph as it rode winds of more than 200mph across the Atlantic. At ground level, the speed of sound is 761mph.
The happy result was a flight time of just five hours and 16 minutes for BA114,
which arrived an hour and half before schedule, according to the tracking website, FlightAware.
Dozens of other flights also benefited from the jet stream’s winter surge, but those same winds have also triggered severe storms across Britain.
Pilots have long used jet streams - which flow across the globe from west to east - to cut journey times and save fuel.
Although airlines advertise the route at seven hours, it is not uncommon for flights to save an hour in the air, said Alastair Rosenschein, a former British Airways pilot who flew 747s between London and New York.
Wednesday’s weather charts show the jet stream was running at 220 knots (250mph) and was unusually wide, he added, making it easier for pilots and their passengers to benefit.
They are generally found between 23,000ft and 39,000ft - perfect altitudes for cruising airliners - and are caused by a combination of the earth’s rotation and heat from the sun.
But while it may help trans-Atlantic passengers arriving from New York, pilots have to plot routes that avoid the high winds when they fly west.