787 Propulsion System - Boeing
www.boeing.com › commercial › aeromagazineIn addition to the improved fuel burn requirements, the 787 propulsion system also had to meet more stringent noise and emissions requirements. Finally, in order to maximize the capital value of the airplane, Boeing decided that the propulsion systems should be designed for full interchangeability between the two engine types.
Fuel economy in aircraft - Wikipedia
https://en.wikipedia.org/wiki/Fuel_economy_in_aircraftModern jet aircraft have twice the fuel efficiency of the earliest jet airliners. Late 1950s piston airliners like the Lockheed L-1049 Super Constellation and DC-7were 1% to 28% more energy-intensive than 1990s jet airliners which cruise 40 to 80% faster. The early jet airliners were designed at a time when air crew labor costs were higher relative to fuel costs. Despite the high fuel consumption, be…