10 ms·
One thing to take into account is that landing and taking off is very wasteful with fuel - jet engines use significantly more fuel when running in dense air and
by izacus 3y ago
One thing to take into account is that landing and taking off is very wasteful with fuel - jet engines use significantly more fuel when running in dense air and that doesn't include increased power for climbing.
I'm sure there's someone who can plug in numbers into a flight planner here, I'm interested in actual numbers.
- amanda99 3y agoOK, sure, I plugged this into a sim flight planner (http://onlineflightplanner.org/ http://onlineflightplanner.org/). This is on a Dreamliner. Heathrow - Changi: 63933 kgs Heathrow - Tehran: 26957 kgs Tehran - Changi: 39580 kgs So at least based on this it's not too much of a difference, only 4% more with a stop. (Tehran looked to be roughly in the middle on the flight plan between London and Singapore.)
- izacus 3y agoInteresting, I'd expect it to be a larger difference considering how much the carriers avoid stopovers. Maybe the fees and organization of refueling tips the balance?
- bombcar 3y agoCarriers don't want to do a stop unless they're offloading and onboarding passengers, so they'd rather run one flight to the intermediary, and another direct.
- izacus 3y agoWell yeah, we're talking a about WHY it's a problem for them to stop.
- coryrc 3y agoIIRC airframe lifetime is rated in pressurization cycles.
- cyberax 3y agoIt adds a surprising amount of time. You have to descend, land, taxi to a fueling area, refuel, taxi, take off, climb. And that's if the local regulations allow fueling with passengers on board. That's probably around 2 hours extra. And this in turn can require the plane to carry additional pilots and flight attendants.