Mind if I get a little boring...uh, more detailed?
Yes, block time is from block out at point A to block in at point B.
But why do two different airlines flying from point A to point B have different block times? How does Southwest do it with those 20 minutes (more like 25-35) turn arounds?
When an airline schedules their flights, they use historical block times (if an added flight on a previously-flown route) or they calculate expected block time. The airline decides what kind of on-time performance they want (a balance of competitive factors, time-of-day constraints, connecting possibilities, etc..).
They decide if they want the flight to be 55% on time (meaning it will operate the segment within the allotted block time or less at least 55% of the time), or 60% on time, or 65%...so on.
If the flight is one that connects at a hub, they may use 70% block time. If the flight is one they would like to connect at a hub, but would definitely be "last in", they may use 50% block time - that way it will show as a connection and sell in reservations systems, and most of the time people will, in fact, be able to connect.
Southwest is primarily point-to-point. Although they do connect a lot of passengers, many of their segments are not connecting to anything else. Plus, they have short turn-arounds. So they have to have a pretty good on-time performance or their operation falls apart. So they (probably, I don't know for sure) schedule at a higher percentage block time - say 70%? 70% of their flights operated to scheduled block or less...meaning the turnaround time just had a couple of minutes here and there thrown in.
Why don't airlines all schedule to 100% block time? $$$. Look at how (mostly) pilots are paid...scheduled block time or actual, whichever is greater. So if your 100% block time means 100% of your flights operate to schedule or less, you're paying too much.
HAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 7, posted (7 years 6 months 2 weeks 1 day 12 hours ago) and read 2806 times:
Quoting OPNLguy (Reply 1): The flight pushes back from the gate (and leaves the wheel chocks/blocks) and taxies to the runway.
Block time:- Time taken from the time Aircraft is chocked off before taxying on its own power for purpose of flight to chocks on at the end of the flight.
Chocks off prior to Pushback on some Aircraft that cannot start engines during pushback.Need the chocks to be placed again during Engine start.Those chocks are withdrawn only after starting Engines & taxying on its own power.
JetMech From Australia, joined Mar 2006, 2699 posts, RR: 53
Reply 13, posted (7 years 6 months 2 weeks 7 hours ago) and read 2643 times:
With my current employer, blocks off time is linked to the release of the parking brake via ACARS. One of the tricks to ensure an "on time" departure is to kick off the brakes at the scheduled departure time. Despite this, the aircraft may well be sitting on the bay for another 5-10 minutes !
JetMech split the back of his pants. He can feel the wind in his hair.
Mayhem From Belgium, joined Feb 2006, 165 posts, RR: 0
Reply 17, posted (7 years 4 months 2 weeks 3 days 14 hours ago) and read 2387 times:
Oh, but i found that block time =
"The period from the moment the chocks are withdrawn and brakes released, or moorings dropped, to the return to rest or take-up of moorings after the flight." So it's Time in Air + taxi? Or is this definition incorrect?