The Daily Mail reports on BA114. The British Airways 777 hit 745 miles per hour — BA’s call sign isn’t “speedbird” for nothing!
What’s more, the flight was reported to have flown at speeds of 745mph relative to ground speed.
The speed of sound at sea level is 761mph.
Several flights are reported to have made the journey from New York to London yesterday in around five hours 20 minutes due to the 200mph North Atlantic jet stream.
I’m not an expert on such things, but I believe that sound travels slower in air than at sea level. I’ve googled references to the speed of sound ‘on earth’ being 750 miles per hour. The Daily Mail claims that this Boeing 777 at 745 miles per hour exceeded the speed of sound. Perhaps knowledgeable readers can weigh in on whether this claim is, in fact, correct.
Or more specifically whether the plane flew at a speed equivalent to the speed of sound on the ground (which appears to be a different matter from actually saying, as the Daily Mail does, that the plane went supersonic).
Regardless, it was a fast Eastbound flight, oddly though not making up most of the time of its departure delay. I sure hope crew finished their service quickly, because it doesn’t leave much time for sleeping.
Fast as this is, it’s not nearly as fast as the Concorde was.. it used to make the journey in about 3 and a half hours and set a record for the journey at under three.
The winds supporting high eastbound speeds, of course, slow down aircraft flying Westbound (or cause them to fly around these heavy winds causing longer flight times). I don’t think I’d want to fly taking a 757 Westbound across the Atlantic this week (unless I’ve never diverted to Goose Bay or Gander and wanted an increased likelihood of doing so).