British-designed jet could reach Australia in under 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 4,000 mph (6,400 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 was quoted by AFP as telling the Guardian daily.
"The A2 is designed to leave Brussels international airport, fly quietly and subsonically out into the north Atlantic at mach 0.9 before reaching mach 5 across the North Pole and heading over the Pacific to Australia," he said.
The plane, which at 143 metres (169 feeet) long would be about twice the size of the biggest current jets, could fly non-stop for up to 12,500 miles (20,000 km).
It operates on liquid hydrogen, which is more ...