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Old Dec 13, 2009 | 10:27 pm
  #15  
AAJetMan
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Join Date: Jul 2003
Location: DFW
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Originally Posted by RichardInSF
On rare occasion from NRT-SFO, I have seen the map show ground speed in excess of 1200km/hr = 745mph. Certainly it is not uncommon to exceed 1100kph = 680mph on this route, especially in winter.

Trans-pacific the jetstream is amazingly fast on occasion, but the same never seems to happen for me on SFO-LHR, I guess that over land it slows down!

Note that eastbound, people don't suffer through the same as a headwind as the aircraft takes a different route for precisely that reason.
Same same for me on NRT-DFW flights, usually shortly after reaching first cruise altitude, not far off Japan coast. Am flying it tomorrow...we'll see.
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