| Airliner (11) |  |
#How to build a hypersonic airliner t is a magic aircraftthe pleasure of flying in it is almost a carnal one.
This thoroughbred airliner could fly from London to Sydney in 17 hours, three minutes and 45 seconds;
the only other civilian airliner able to break the speed of sound was the Soviet union Tupolev tu-144,
The end of the Concorde and Tupolev airliners left the supersonic market empty. But now, 12 years after the Concorde fleet last flew,
even faster airliners are taking shape in research facilities. One of those designs is by Lapcat-II,
At the AIAA Hypersonic Space Plane conference in Glasgow in Scotland in July, a paper submitted by Lapcat-II researchers said their early airliner tests suggested such a design would be greener than current aircraft,
In Asia, Japan aerospace exploration agency (Jaxa) is also working on a hypersonic airliner called Hytex intended to cross the Pacific ocean in two hours at speeds of Mach 5. Both Lapcat-II
though hydrogen-fuelled airliners would not emit greenhouse-increasing gases such as carbon dioxide, sulphur oxides or soot like today subsonic airplanes,
And that effect could be worse than the current fleet of long-haul airliners the longer that water vapour remains."
"Lapcat-II also plans for their Mach 8 Esa-variant airliner to fly well above 33 km, hopefully minimising the environmental impact.
The Jaxa project has studied the potential market for hypersonic airliners travelling at Mach 5 and found a 100-passenger aircraft flying two round trips per day is realistic based on market research.
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