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Anonz263x
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CF6-50 vs CF6-80

Fri May 08, 2020 8:02 pm

What are the differences between both CF6 variants? The only thing Ive noticed how the later -80 series lacks that idling sound which to me sounds like "whine", and it seems to be much quieter?
 
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atcsundevil
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Re: CF6-50 vs CF6-80

Fri May 08, 2020 8:56 pm

Anonz263x wrote:
What are the differences between both CF6 variants? The only thing Ive noticed how the later -80 series lacks that idling sound which to me sounds like "whine", and it seems to be much quieter?

I have moved your thread to the Tech/Ops Forum, as that's the more appropriate place for technical questions.

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LH707330
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Re: CF6-50 vs CF6-80

Fri May 08, 2020 11:22 pm

There are really four versions in there, the 50, 80A, 80C2, and 80E. In a nutshell, here's an overview:

50: baseline
80A: compact layout version
80C2: new core and bigger fan
80E: similar architecture to 80C2 with some other tweaks (this helped them be first to market, but cost them later on against the T700)

https://en.wikipedia.org/wiki/General_Electric_CF6

Edit to add: https://web.archive.org/web/20090127013 ... story.html
 
jfk777
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Re: CF6-50 vs CF6-80

Sat May 09, 2020 12:25 am

The CF6-80C2 was really the successful engine here, it was big on 767-300ER, MD-11, A300-600R, and 747-400. AA flew three different airplanes on the 1990's with the CF6-80C2, they flew 767 until recently. The CF6-80C2 was and until recently on many 744. KLM, Lufthansa, JAL, ANA, Air New Zealand, Virgin Atlantic, Thai, and Varig all had 744 CF6-80C2 powered fleets. The CF6 was the dominant 744 engine much to the chagrin of Rolls Royce and Pratt. Many 767 are also CF6-80C2 powered, it was the king there too.

Sadly all good things come to an end, then GE made the GE90 and what happened ? Boeing's next big airplane the 777-300ER was GE powered exclusively. Boeing has sold about 800 77W's. The 787 also is largely GE powered, as are all the 747-8's.
 
Anonz263x
Topic Author
Posts: 8
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Re: CF6-50 vs CF6-80

Sat May 09, 2020 5:31 am

LH707330 wrote:
There are really four versions in there, the 50, 80A, 80C2, and 80E. In a nutshell, here's an overview:

50: baseline
80A: compact layout version
80C2: new core and bigger fan
80E: similar architecture to 80C2 with some other tweaks (this helped them be first to market, but cost them later on against the T700)

https://en.wikipedia.org/wiki/General_Electric_CF6

Edit to add: https://web.archive.org/web/20090127013 ... story.html

So pretty much the changes to the later versions made it more quieter and removed that "whine" when idling or starting up?
 
Sokes
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Re: CF6-50 vs CF6-80

Sat May 09, 2020 10:45 am

@jfk777: nice post. I learned something.
Why can't the world be a little bit more autistic?
 
LH707330
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Joined: Fri Jun 15, 2012 11:27 pm

Re: CF6-50 vs CF6-80

Sat May 09, 2020 9:33 pm

Anonz263x wrote:
LH707330 wrote:
There are really four versions in there, the 50, 80A, 80C2, and 80E. In a nutshell, here's an overview:

50: baseline
80A: compact layout version
80C2: new core and bigger fan
80E: similar architecture to 80C2 with some other tweaks (this helped them be first to market, but cost them later on against the T700)

https://en.wikipedia.org/wiki/General_Electric_CF6

Edit to add: https://web.archive.org/web/20090127013 ... story.html

So pretty much the changes to the later versions made it more quieter and removed that "whine" when idling or starting up?

Seems like that's the case, though I doubt that was the design intent.

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