3 ms·

The biggest time sink when traveling between continents is the jet lag. A faster jet doesn’t fix that, it only costs more and pollutes more.

jjeaff 6y ago
The new 787 has made her lag a lot better with better air quality, timed, dimming cabin lights and a few other comfort trucks, it definitely takes the edge off.
- the_duke 6y ago
  One of the biggest factors is cabin altitude. Both the Boeing 787 and the Airbus A350 XWB have a lower (than previous airliners) cabin altitude of 1,800 m. Note that some private jets do quite a bit better again: the Gulfstream G650 has ~1480 meters.
  - mshook 6y ago
    Concorde cabine altitude was set to 1,700 metres or 5,500ft...
    - the_duke 6y ago
      According to Wikipedia it was also 1,800m. [1] 1: https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation
      - mshook 6y ago
        Well different sources: https://www.heritageconcorde.com/concorde-pressurization-system https://www.heritageconcorde.com/concorde-pressurization-sys... Airliner cabins are usually pressurised to 6-8,000 ft (1,800-2,400 m) elevation while the aircraft flies much higher. Concorde’s pressurisation was set to an altitude at the lower end of this range, 6000 feet. https://museedelta.wixsite.com/musee-delta/single-post/2020/05/02/Technical-flight-report-Concorde-Thursday-April-3-1986 https://museedelta.wixsite.com/musee-delta/single-post/2020/... The two independent and fully automatic air conditioning units provide a cabin altitude of 5,500 ft (1,600m) at flight level 590. https://books.google.fr/books?id=aekGAgAAQBAJ&pg=PA506&lpg=PA506&dq=concorde+cabin+pressure+%226000%22&source=bl&ots=a-64-w7OGu&sig=ACfU3U2ulKUAIO0-lhxpbStDb4EVLSFwFw&hl=en&sa=X&ved=2ahUKEwjn_crogMvqAhVDQBoKHcUjCKoQ6AEwDXoECAkQAQ#v=onepage&q=concorde%20cabin%20pressure%20%226000%22&f=false https://books.google.fr/books?id=aekGAgAAQBAJ&pg=PA506&lpg=P... Concorde's pressurisation was set to an altitude at the lower end of this range, 6,000 feet (1,800 m). Bottom line is 1700 or 1800m, Concorde did that 50 years ago...
- new_realist 6y ago
  Jet lag, for me, is more about circadian rhythm disruption than air quality. That’s where sleeping on a longer flight is much more preferable to taking a shorter, faster flight and then suffering until one can get into a blacked out hotel room. But in either case the downtime would be similar, I think.

jjeaff 6y ago

The new 787 has made her lag a lot better with better air quality, timed, dimming cabin lights and a few other comfort trucks, it definitely takes the edge off.

the_duke 6y ago
One of the biggest factors is cabin altitude. Both the Boeing 787 and the Airbus A350 XWB have a lower (than previous airliners) cabin altitude of 1,800 m. Note that some private jets do quite a bit better again: the Gulfstream G650 has ~1480 meters.
- mshook 6y ago
  Concorde cabine altitude was set to 1,700 metres or 5,500ft...
  - the_duke 6y ago
    According to Wikipedia it was also 1,800m. [1] 1: https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation
    - mshook 6y ago
      Well different sources: https://www.heritageconcorde.com/concorde-pressurization-system https://www.heritageconcorde.com/concorde-pressurization-sys... Airliner cabins are usually pressurised to 6-8,000 ft (1,800-2,400 m) elevation while the aircraft flies much higher. Concorde’s pressurisation was set to an altitude at the lower end of this range, 6000 feet. https://museedelta.wixsite.com/musee-delta/single-post/2020/05/02/Technical-flight-report-Concorde-Thursday-April-3-1986 https://museedelta.wixsite.com/musee-delta/single-post/2020/... The two independent and fully automatic air conditioning units provide a cabin altitude of 5,500 ft (1,600m) at flight level 590. https://books.google.fr/books?id=aekGAgAAQBAJ&pg=PA506&lpg=PA506&dq=concorde+cabin+pressure+%226000%22&source=bl&ots=a-64-w7OGu&sig=ACfU3U2ulKUAIO0-lhxpbStDb4EVLSFwFw&hl=en&sa=X&ved=2ahUKEwjn_crogMvqAhVDQBoKHcUjCKoQ6AEwDXoECAkQAQ#v=onepage&q=concorde%20cabin%20pressure%20%226000%22&f=false https://books.google.fr/books?id=aekGAgAAQBAJ&pg=PA506&lpg=P... Concorde's pressurisation was set to an altitude at the lower end of this range, 6,000 feet (1,800 m). Bottom line is 1700 or 1800m, Concorde did that 50 years ago...
new_realist 6y ago
Jet lag, for me, is more about circadian rhythm disruption than air quality. That’s where sleeping on a longer flight is much more preferable to taking a shorter, faster flight and then suffering until one can get into a blacked out hotel room. But in either case the downtime would be similar, I think.