5 ms·
other than lower speeds during approach and departure around controlled airspace with speed restrictions, the overwhelming majority of a transatlantic flight wi
by nopzor 5y ago
other than lower speeds during approach and departure around controlled airspace with speed restrictions, the overwhelming majority of a transatlantic flight will be at full speed.
of course, there are exceptions with congestion, hold patterns, excessive vectoring, etc, but this is generally true.
another thing to keep in mind is headwinds/jetstream. when going west across the atlantic; they can often be 100+mph. so the delta between boom and eg. a 787 becomes even more pronounced in this situation.
- ginko 5y agoIt’s not like the 787 can’t also make use of the jetstream.
- deleted 5y ago[deleted]
- t0mas88 5y agoTypical height of the polar front jet stream is 30-40,000ft, that's great for a 787 that's most efficient exactly in that altitude range. But doing mach 1.7+ you want to be much higher for efficiency, so it's entirely likely that the Boom plane will miss the jet stream.
- Dylan16807 5y agoThey're talking about going against the jetstream, so that doubling air velocity means more than doubling ground velocity. If the boom plane gets to miss the jet stream entirely that only improves the situation.