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World's biggest jet engine about to get bigger, quieter ..and make more contrails

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posted on May, 29 2014 @ 04:36 PM
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And more efficient - which means even more contrails!!


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."


And GE's own page on the GE9X is here -


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.


these days about 50% of the operating cost of a passenger aircraft is fuel - up from about 1/3rd in 2000 (from a course I did in 2003). The increase is largely driven by increasing fuel costs (duh) but also lower costs for maintenance and crew - the total cost per seat/mile is dropping - which means the fixed-or-slightly-increasing-fuel-cost-per-seat-mile is a larger portion of the total.

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!




posted on May, 29 2014 @ 05:32 PM
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a reply to: Aloysius the Gaul

The skies never looked like this back in 2014. Just look up!



posted on May, 29 2014 @ 05:37 PM
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World's biggest jet engine about to get bigger



posted on May, 29 2014 @ 05:59 PM
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a reply to: Aloysius the Gaul

As the study makes clear, the increase in contrail formation only occurs because of formation at sllightly higher temperatures, i' e., lower altitudes. Since fuel consumption increases with lower altitudes, no one will go there unless they have to for traffic or wind or weight reasons. So while you may see longer contrails, there won't necessarily be more of them.



posted on May, 29 2014 @ 06:00 PM
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Ohh.. So where just doing that ole bigger and bigger thing now

Still ignoring antigravity technology then I guess



posted on May, 29 2014 @ 07:59 PM
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You said contrail, not chemtrail...

Thank you

Thank you

Thank you




posted on May, 29 2014 @ 10:10 PM
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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.
edit on 5/29/2014 by Phage because: (no reason given)



posted on May, 29 2014 @ 10:46 PM
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a reply to: Phage

But the ones produced in marginal conditions are the only true contrails - 'cos they don't last very long...



posted on May, 30 2014 @ 02:35 AM
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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.


Actually, persistence depends on much more than ambient humidity. The rate of sublimation of a homogeneous substance like ice crystals also depends on the surrounding pressure, temperature, and rate of freezing since that rate controls the amount of captured air bubbles in the crystal. That captured air doesn't eed to sublimate to "disappear'"
The nature of the energy source applied to the evaporative face also matters. A good technical reference is at link.springer.com...-1.



posted on May, 30 2014 @ 02:49 AM
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a reply to: F4guy
Your link is about ice at very low pressures (1600 N/m2 = 0.472 inHg, that's equivalent of an altitude of about 100,000 feet). I'm sure the article is interesting, in particular to reference on the behavior of water on Mars.

Yes, there are other factors involved, but when all is said and done, at the altitude at which most jets fly contrail persistence is determined by humidity. More efficient engines won't change that.
edit on 5/30/2014 by Phage because: (no reason given)



posted on May, 30 2014 @ 03:59 AM
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a reply to: Phage

To the extent that the contrails can be formed at a lower (hence warmer) altitude, given the attendant increase in ambient water vapor partial pressure, there will be some effect. One of the cockpit instruments we don't have is one for humidity, either relative, absolute, or mixing ratio. We do have outside air temperature and, to some extent pressure but at altitudes above 18,000 feet, altimeters are set to 29.92 "Hg. So, an observational correlation of formation with conditions is difficult.



posted on May, 30 2014 @ 01:03 PM
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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...

Since when do facts have any bearing on a conspiracy theory?



posted on May, 31 2014 @ 01:54 PM
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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.



posted on May, 31 2014 @ 02:39 PM
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a reply to: luxordelphi




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...


Wow do you ever think before posting?

Are you saying that atmospheric humidity is a sham, and is not a reason why contrails persist?



posted on May, 31 2014 @ 03:22 PM
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a reply to: tsurfer2000h

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.



posted on May, 31 2014 @ 03:41 PM
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a reply to: luxordelphi
Any estimates of the propaganda density of a cirrus cloud?



posted on May, 31 2014 @ 03:43 PM
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a reply to: luxordelphi




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...


So you are saying it's a sham, is that about right?

Could you please provide some of this so called propaganda that you speak of, because this should be interesting?

And while your at it you should take a look at this...

From someone who knows a little about weather related topics such as persistent contrails.

www.abovetopsecret.com...



posted on May, 31 2014 @ 04:16 PM
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originally posted by: DenyObfuscation
a reply to: luxordelphi
Any estimates of the propaganda density of a cirrus cloud?



There actually are mechanisms in place (beyond school children) that measure density of cirri.



posted on May, 31 2014 @ 04:22 PM
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a reply to: luxordelphi
And the measurement is of the density of?

A) Ice crystals

B) Propaganda

( I don't get the references to the children. Is that something in particular? )



posted on May, 31 2014 @ 04:24 PM
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