3 ms·

Also there were over land speed limits applied. Apparently while at BOS you could hear the boom as the JFK-LHR flights accellerated once far enough off the coa

Also there were over land speed limits applied. Apparently while at BOS you could hear the boom as the JFK-LHR flights accellerated once far enough off the coast

vegabook 11y ago
A far better measure is the London-NY time record comparison. 777-200 did it in 5.27 hours on Jan 15 (http://www.telegraph.co.uk/news/worldnews/northamerica/usa/11337617/Jet-stream-blasts-BA-plane-across-Atlantic-in-record-time.html http://www.telegraph.co.uk/news/worldnews/northamerica/usa/1...). Concorde record was 2.88 hours (2h 53 minutes). Ratio = 1.83:1. Much higher than the confusing Sydney comparison (1.25:1) with its stopovers.