But the testing isn't just about making things quieter; it's about making the engine more fuel efficient, producing fewer emissions.
"Economics to airlines is all about fuel burn," said Chuck Johnson, GE Aviation's program lead for the 9X. "We're committing to a 10 percent fuel burn improvement on the GE9X."
Delivering bigger fuel-burn advantages
The GE9X will be the most fuel-efficient engine GE has ever produced on a per-pounds-of-thrust basis, designed to achieve significant fuel burn savings over its predecessor, including:
10% better SFC than the GE90-115B-powered 777-300ER.
5% better SFC than any other twin-aisle engine in 2020.
originally posted by: Phage
More contrails yes. More persistent contrails, no. Not because of the newer engines anyway.
Persistence depends on humidity. While more efficient engines will produce contrails under marginal conditions where other engines may not, the conditions which are conducive to persistent contrails are not marginal. Under such conditions all engines will produce contrails and those contrails will persist.
However this of course means more contrails - since higher efficiency engines tend to produce more contrails as this study measured - so it will be a bumper time for chemmies to rant on! - See more at: www.abovetopsecret.com...
Atmospheric humidity, at large, is determined by elementary school children and then backed into models so that if a contrail persists, it is assumed that the humidity is conducive. - See more at: www.abovetopsecret.com...
Atmospheric humidity as it relates to today's persistent contrails is an artefact of the propaganda which attempts to perpetuate the outrageously persistent contrail myth. - See more at: www.abovetopsecret.com...