jb747
Enthusiast
- Joined
- Mar 9, 2010
- Posts
- 12,999
While weather and airline traffic (congestion) conditions are far from identical every day, this rather begs the question: If QF expects that 64 minutes can be taken out of the schedule on this complete gate-to-gate trip, why aren't the timetables adjusted to reflect these achievable faster journey times?
What time would you adjust the schedules to? That which you achieve 10%, 50%, 85% of the time? Or some other variation.
We've discussed this before. The times are not padded, for many reasons. An obvious one is planning for crew rosters. Even adding a relatively small amount to each and every planned flight could have a profound effect on flight time limitations. Whilst you need to ensure crew don't exceed limits, there is no point to underusing them because of poor planning. Looking back at many years of my rostered times, versus the actual, and I find that they balance out very closely...which wouldn't happen if they were being padded.
Yes, you can make up time. Normally not much, but if preplanned, and you don't mind using the large amount of fuel required, you might find another 20 knots of ground speed. Multiply that over 13 hours or so, and you made a lot of time. Of course, Dubai (in particular) will just throw that away with holding when you arrive, but you never know. Of course, if you're on a route with other aircraft (most of the time), you can't just rip along .03 mach faster than everyone else. ATC will eventually have something to say about that. Nor is it all that smart near any sort of bumps.
Over the last couple of weeks, QF94 has had some really nice fast flight times. Pure luck of the draw. They've not been flown any faster than usual...but the winds have not been as adverse as normal.
Historically, flight times were actually shortened to look better. In the days of TAA and Ansett, they ultimately reached the strange situation of scheduled 737 times that were not achievable using the faster 767. The theory was that the passengers would book with whomever said they were faster. I wonder if that really worked?