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Reinventing the (airplane) wheel

E-taxi systems could save airlines millions in their oil bills soon

[SINGAPORE] Airplanes have progressed from wooden propellers to supersonic jets in the last century. But over the years, surprisingly little has changed in their efficiency on land. Jet engines burn some 200,000 litres of fuel - in a single Boeing 737 - annually taxiing forward, while tugs are

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