thadocta
In memoriam
- Joined
- Jan 8, 2003
- Posts
- 755
Actually, it is easier to argue with the position of the esteemed moderator, IF you have some hard figures (apart from the figures that NM quoted). I don't profess to have those figures though.mathematics wins again! hard to argue with simple arithmetic like that (unless you're hillary clinton)
Looking at fuel loaded, the 763 will be loaded much closer to full fuel capacity than the 743 will be, since the 743 has a longer range. Thus, the 763 will be much closer to MTOW than the 743 will be, and hence each engine will burn more fuel at the earlier stages of the flight (taxi, take-off, climb and early cruise) than each engine on the 743 will, due to the heavier load on the engine.
Looking at the MTOW/engine ratio, they are fairly even - the 743 with a MTOW (which it won't even be close to on this sector) of 377,842kg, spread over four engines, is 94,460kg per engine, whereas the 763, at MTOW of 172,365kg, which it will be approaching, will be 86,182kg per engine.
Since the 743 will be lightly loaded, it won't come close to burning this much fuel, whereas the 763 being closer to the MTOW will.
All in all, not much of a difference as far as fuel usage goes.
Then factor into it the extra revenue available with increased capacity, plus extra revenue from increased cargo capacity, and I really do not think it is as clear cut as some think it is.
ALTHOUGH - increased flexibility that becomes available with three 763's vs two 743's might be more appealing to business passengers, but that is a marketting issue rather than an operational issue.
Dave