docjames
Senior Member
- Joined
- Jul 10, 2007
- Posts
- 9,458
- Qantas
- Gold
Agree i didnt add inA few things at play here:
- Both routes last night are within a few nm of each other (~3530nm), with overall wind component differing by just a couple of knots (~P40) ; however
- A380 normally cruises slightly faster at M084-M085 vs M081-M082 for the A333
- If QF2 can arrive before curfew end (6am) this is generally preferable as it wouldn't need to be sequenced. Additionally, arriving before curfew end also means shortcuts if coming from the west (over Royal National Park towards the IAF, sometimes from 200+ nm out), and often cancelled speed restrictions on descent. QF2 got both of these last night
- QF292 arrives at a busy time in the morning, so often has to slow and/or fly extra track miles to fit into the sequence. With the runway config this morning being 16 direction and AC33, DL41, UA863, UA839 all coming in via BOREE (ie from the north).. this pushed QF292 down the order slightly
- “padded timetable” for ground handling requirements or seasonal winds (often what is a 45min boarding delay becomes an on time arrival) or arrival/departure slots
Net: there are a lot of factors, and the airline holds data and uses it in scheduling