the 359? A 275t variant or a 268? I doubt either will fly this route, nearly 7400nm, with a payload DL wants. The 268t won't get there with full pax, a 280t probably does; below that it would be dicey.
Right. And yet SFO-SIN doesn't seem to be a problem with either the 789 or A359. Please
"THE" 359? There is no "the" 359. There are like 4 variants? 268t, 275t, 276t, and 280t. WHICH 359? In which config? "The" 789? There is no "the" 789. Every airline has a different config from QF at 220 pax to several at 295.
SQ's SFO-SIN sheet is on another thread, 5.85t/hr, 271t TOW, 7t or so fuel left at landing on a 276t variant, 253 pax. At 325pax (brochure), they're over MTOW. It went out at 271t with 103t out of 110t fuel aboard, burnt 96.3t. Add 7t of pax to get to brochure and they're overweight. Yeah they could drop a few tons of fuel to get to a 4.5t reserve or whatever, a point people made on that thread. But they will need more fuel to carry the additional 7t that distance, along with to carry the extra fuel itself. This puts the plane decidedly over 276t. Plane surely had cargo aboard, you'd have to drop that. 276t at that range is not happening on a brochure pax count, thus they fly with 253.
The LAX-SYD argument, someone posted a video of the FC on a "276" variant of DL (do they have 275 or 276??) with TOW at 275.4. It had 238pax, 25t cargo on that mission. Total load apparently would be around 48t give or take. You need 1600 more nm to do ATL-BOM. that exceeds 3 hrs of fuel, probably more like 4 given the fuel carrying fuel penalty. There goes all your cargo. You're still at 238pax. DL has 300 seats. See what I'm trying to say here? The 276t version won't do the route with a full load based on real world data. Never mind cargo. If DL adds 6t of pax, they'd be at 281t. This is why I say the 280t variant would probably get there with a brochure pax load but the other variants won't.
NZ's 789 config *will not* do SFO-SIN. Max still air for that config is around 7100nm. QF otoh flies at 220pax, consequently they probably are getting nearly 8000nm still air.
Last edited by trav777
on Thu Jan 17, 2019 5:45 pm, edited 1 time in total.