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British engineers unveiled plans Tuesday for a hypersonic jet which could fly from Europe to Australia in less than five hours.
The A2 plane, designed by engineering company Reaction Engines based in Oxfordshire, southern England, could carry 300 passengers at a top speed of almost 6400 kmh, five times the speed of sound.
The LAPCAT (Long-Term Advanced Propulsion Concepts and Technologies) project, backed by the European Space Agency, could see the plane operating within 25 years, the firm's boss Alan Bond told the Guardian daily.