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When in Rome
USA Fan
Telegraph Road
Member since Jan 2011
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A Picture of the New 747 Engines




Also, for a little fun fact, those little serrated edges are called chevrons.

From my understanding, they eliminate so much sound that several hundred pounds of insulation can be removed from the fuselage.

Link to chevron patent with more information
quote:

A gas turbine engine exhaust nozzle includes an exhaust duct for channeling a gas jet. A plurality of adjoining chevrons are disposed at an aft end of the duct to define an exhaust outlet. Each of the chevrons is triangular in configuration, with a base, apex, side trailing edges converging therebetween, and radially opposite first and second surfaces bounded thereby. The trailing edges of adjacent chevrons are spaced laterally apart to define respective diverging slots disposed in flow communication with the duct. The chevrons have a concave contour axially between the bases and apexes which promotes jet mixing through the slots.
quote:

The prior art includes various solutions for reducing jet noise and infrared signature. The solutions typically rely on vigorously mixing the hot core jet with the fan jet, or ambient air, or both, for reducing the velocities thereof and reducing the temperature thereof. In this way both noise and infrared signature may be reduced, but typically at the expense of engine efficiency and performance.







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TigerTatorTots
New Orleans Pelicans Fan
The Rec, Middle Courts- retired
Member since Jul 2009
63650 posts

re: A Picture of the New 747 Engines


Those are sleek





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Powerman
LSU Fan
Corpus Christi, TX
Member since Jan 2004
120328 posts

re: A Picture of the New 747 Engines


Will never be ready in time





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LNCHBOX
LSU Fan
Kenner, LA
Member since Jun 2009
14577 posts
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re: A Picture of the New 747 Engines


Very similar to to the 787's engine.





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Cracker
LSU Fan
in a box
Member since Nov 2009
4894 posts

re: A Picture of the New 747 Engines


Are they GE Pratt & Whitney or Rolls Royce





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When in Rome
USA Fan
Telegraph Road
Member since Jan 2011
25178 posts
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re: A Picture of the New 747 Engines


What?

Per Wikipedia:
quote:

In July 2013, confirmed orders for the 747-8 totaled 107, including 67 of the freighter version, and 40 of the passenger version.






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Wally Sparks
Georgia Tech Fan
Atlanta
Member since Feb 2013
6267 posts

re: A Picture of the New 747 Engines








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OneMoreTime
SMU Fan
Florida Gulf Coast Fan
Member since Dec 2008
45014 posts

re: A Picture of the New 747 Engines


Nerd





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meaux5
USA Fan
Lafayette/BR
Member since Sep 2010
7850 posts

re: A Picture of the New 747 Engines


those are so





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FootballNostradamus
Clemson Fan
Member since Nov 2009
13015 posts

re: A Picture of the New 747 Engines


quote:

Are they GE Pratt & Whitney


Pretty sure these are being produced by GE out of South Carolina.






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BayouBandit24
New Orleans Saints Fan
Member since Aug 2010
11378 posts

re: A Picture of the New 747 Engines


quote:

Nerd


more like redditor






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gasmonkey
New Orleans Saints Fan
Who Dat Nation
Member since Jul 2013
2289 posts

re: A Picture of the New 747 Engines


hemi? flexfuel?





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When in Rome
USA Fan
Telegraph Road
Member since Jan 2011
25178 posts
 Online 

re: A Picture of the New 747 Engines


quote:

Pretty sure these are being produced by GE
Yep. This is from a May 2013 article:

quote:

Boeing has begun flight tests of a 747-8 passenger model powered by upgraded General Electric GEnx-2B engines, which are expected to improve fuel burn by a further 1.8%.






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AlpineHawg
USA Fan
Lake City
Member since Sep 2013
449 posts

re: A Picture of the New 747 Engines


They are very quiet. I do aviation photography on the side and you don't hear them until they're about 400 yards away. Don't need ear pro





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GeauxWarTigers
LSU Fan
Auburn
Member since Oct 2010
15478 posts

re: A Picture of the New 747 Engines


quote:

more like redditor


Reddit ruins the rest of the internet for me. Nothing is new anymore. Any cool thing posted on another site is a repost.






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When in Rome
USA Fan
Telegraph Road
Member since Jan 2011
25178 posts
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re: A Picture of the New 747 Engines


quote:

I do aviation photography on the side
Care to share any pics? That's awesome!






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hardhead
LSU Fan
stinky bayou
Member since Jun 2009
3850 posts

re: A Picture of the New 747 Engines


I already ordered a set for my golf cart





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HandGrenade
LSU Fan
Member since Oct 2010
9429 posts
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re: A Picture of the New 747 Engines


quote:

From my understanding, they eliminate so much sound that several hundred pounds of insulation can be removed from the fuselage.


That is actually pretty cool..






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HoustonChick86
Arizona Fan
Catalina Wine Mixer
Member since Dec 2009
41710 posts

re: A Picture of the New 747 Engines


quote:




Angle pic!!

They do look pretty sleek.






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Power-Dome
LSU Fan
B-Arruh
Member since Nov 2012
470 posts

re: A Picture of the New 747 Engines


Another fun fact: turbo-fans like those in the picture get the bulk of their thrust from the main fan flow around the outside if the turbine!





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