A340 performance specs4/6/2024 ![]() Second, quad aircraft operated with relatively fewer passengers over the Pacific in 2016 compared to twinjets due to lower seating densities and passenger load factors. Aircraft with four engines, or "quads", tend to be less fuel-efficient than twinjets due to inherent design factors such as a higher wing weight and a smaller engine fan diameter. There are two reasons for this, one related to the aircraft itself and the other to how they are used on transpacific flights. Size matters, but not in the way you think.Īirlines that operate very large aircraft burn more fuel and release more carbon than their peers. But in the case of flights over the Pacific, conventional wisdom turns out to be wrong. One might assume that the larger the plane, the more fuel-efficient it is per passenger due to economies of scale. One interesting finding was that airlines that predominantly use the four-engine Boeing 747 and Airbus A380 aircraft - Asiana, Korean Air, and Qantas - had the lowest overall fuel efficiency on transpacific operations. In our recent transpacific airline ranking, we assessed and compared the fuel efficiency of the top 20 airlines operating flights between the U.S., East Asia, and Oceana. ![]()
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