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Topic: Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?
Posted by: Tim Henderson
Date/Time: 31/08/14 11:25:00

I think it is argued that there is an optimum speed to maximise the plane efficiency and to go slower will therefore bump up the operational costs.

BA claimed in their response to the first phase of the recent Night Flights consultation :

"Aircraft cruising speed:
Aircraft have a range of speeds that they can fly at, bounded by a minimum and maximum
safe speed. The optimum speed is one which is calculated to offer a balance between fuel
economy and flight time. However, on a representative sample of BA flights from HKG, 57%
of flights have to be flown at or close to minimum speed (i.e. sub optimal) in order not to
land at Heathrow before 0430."

I haven't looked at it properly,(and with the weekday runway resurfacing work and night planes landing on the southern runway I'm not woken up at 0430 anything like as much !) but I think there are fewer planes landing in the 0430-0500 half hour than there used to be. I recall that only 2 used to be scheduled there, but it was not unknown to get 7 or 8. Whether this is because planes are now avoiding Ukrainian airspace and have to take a longer route, or XMAN for arrivals slows things down or Heathrow are more insistent that the schedule is adhered to, I don't know.


Entire Thread
TopicDate PostedPosted By
More flights before 6am already?14/03/14 18:20:00 Dave Robertson
   Re:More flights before 6am already?14/03/14 19:39:00 Tim Henderson
      Re:Re:More flights before 6am already?14/03/14 23:57:00 Dave Robertson
   Re:More flights before 6am already?15/03/14 00:11:00 Richard Jennings
      Re:Re:More flights before 6am already?15/03/14 09:55:00 Michael Brown
         Re:Re:Re:More flights before 6am already?15/03/14 11:29:00 Dave Robertson
            Re:Re:Re:Re:More flights before 6am already?15/03/14 11:41:00 Thomas Barry
               Re:Re:Re:Re:Re:More flights before 6am already?15/03/14 15:26:00 Michael Brown
            Re:Re:Re:Re:More flights before 6am already?15/03/14 21:58:00 Richard Jennings
               Re:Re:Re:Re:Re:More flights before 6am already?18/03/14 11:08:00 Michael Brown
                  Re:Re:Re:Re:Re:Re:More flights before 6am already?18/03/14 23:21:00 Jim Lawes
                     Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?18/03/14 23:50:00 Richard Jennings
                        Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?19/03/14 00:46:00 Dave Robertson
                        Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?19/03/14 02:46:00 Jim Lawes
                           Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?19/03/14 04:22:00 Brendan McCarthy
                           Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?20/03/14 08:15:00 Dave Robertson
                              Re:More flights before 6am already?20/03/14 14:05:00 Ian Wylie
                                 Re:Re:More flights before 6am already?20/03/14 17:47:00 Richard Jennings
                                    Re:Re:Re:More flights before 6am already?20/03/14 20:50:00 Jim Lawes
                                       Re:Re:Re:Re:More flights before 6am already?20/03/14 20:53:00 Jim Lawes
                                       Re:Re:Re:Re:More flights before 6am already?20/03/14 22:07:00 Dave Robertson
                                          Re:Re:Re:Re:Re:More flights before 6am already?20/03/14 23:43:00 Jim Lawes
                                             Re:Re:Re:Re:Re:Re:More flights before 6am already?21/03/14 00:43:00 Richard Jennings
                                                Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?21/03/14 05:58:00 Jon Perry
                                                   Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?21/03/14 10:01:00 Fred Bray
                                                Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?21/03/14 11:16:00 Dave Robertson
                                                   Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?21/03/14 18:24:00 Tim Henderson
                                                      Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 07:30:00 James Petri
                                                         Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 07:49:00 Dave Robertson
                                                            Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 08:07:00 James Petri
                                                               Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 08:55:00 Richard Greenhough
                                                                  Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 09:11:00 James Petri
                                                                     Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 11:25:00 Tim Henderson
                                                                        Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:Re:More flights before 6am already?31/08/14 14:22:00 Dave Robertson

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