Looks like the airlines have asked Boeing to look again at the sonic curiser - this is from the UK's Telegraph newspaper.
PLANS for a successor to Concorde which would be three times cheaper to fly are being drawn up by the American manufacturers, Boeing.
The company said yesterday that it had been asked by airlines to revise its designs for a "Sonic Cruiser" to produce an aircraft capable of flying at 1.8 times the speed of sound, roughly 1,200mph.
Boeing's initial concept, announced nine months ago, envisaged a plane that would travel at 0.98 of the speed of sound, about 10 or 15 per cent faster than conventional jets.
However, a group of leading carriers believes that the time gain offered by the original version will be insufficient, and wants to offer passengers much more radical reductions in journey times.
Wind tunnel tests on the basic Sonic Cruiser have shown that its unique front-located winglets and outward-leaning twin tails have reduced to almost zero the buffeting effect expected as the aircraft approaches the sound barrier.
Work is also proceeding on adapting the shape of the main double-delta wings to decrease the impact of the sonic boom, opening the possibility that supersonic flight over land might become achievable for the first time.
Pete Rumsey, Boeing's director of aircraft development, said advances in technology would allow the twin-engined aircraft to be as fuel-efficient per passenger as any existing jet.