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EA772LR
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Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 6:31 pm

I wanted to do some research on the CF34-8E for a class of mine and was wondering what the fan diameter is for this engine. I've looked all over-geae.com/embraer.com/etc. and have had no luck. All that I have found is max engine diameter, which is not the same as fan diameter. Listed so far has a max fan diameter of 53 inches for the CF34-8E. Do any of you guys know any details about this engine-manuals, mx experience, etc. to help. Thanks

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miamiair
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 7:16 pm

Quoting EA772LR (Thread starter):

Try the type certificate data sheets at faa.gov.

http://rgl.faa.gov/Regulatory_and_Gu...6256c0800477e3b/$FILE/E00063en.pdf

[Edited 2008-04-03 12:19:32]
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F14D4ever
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 7:50 pm



Quoting Miamiair (Reply 1):
Try the type certificate data sheets at faa.gov.

I don't see it in there ... just the same old drivel about 'max diameter'.

I believe the number you want is 45.6 inches.
"He is risen, as He said."
 
EA772LR
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 7:50 pm

Thank you Miamiair  thumbsup 
We often judge others by their actions, but ourselves by our intentions.
 
EA772LR
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 7:52 pm



Quoting F14D4ever (Reply 2):
I believe the number you want is 45.6

Where did you find 45.6 inches??? That would seem right as the whole engine's max diameter is 53 inches.
We often judge others by their actions, but ourselves by our intentions.
 
F14D4ever
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 9:41 pm



Quoting EA772LR (Reply 4):
Where did you find 45.6 inches???

Off my spreadsheet summary of engine parameters. I don't remember the original source. Probably asked one of my associates at GEAE.
"He is risen, as He said."
 
EMBQA
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 9:52 pm

Quoting F14D4ever (Reply 2):
I believe the number you want is 45.6 inches.

Close.....

The GE CF34-8E is 46.2"
The GE CF34-10E is 53"

[Edited 2008-04-03 14:59:34]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
EA772LR
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 11:06 pm



Quoting F14D4ever (Reply 5):
Off my spreadsheet summary of engine parameters. I don't remember the original source. Probably asked one of my associates at GEAE.

Thanks for the info.

Quoting EMBQA (Reply 6):
The GE CF34-8E is 46.2"
The GE CF34-10E is 53"

May I ask where you found this, so I can finally figure out where to find these dang numbers!!! Thanks
We often judge others by their actions, but ourselves by our intentions.
 
EMBQA
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RE: Fan Tip Diameter For The CF34-8E

Thu Apr 03, 2008 11:19 pm

Quoting EA772LR (Reply 7):

In my GE CF34-8E Training Manuals.....I don't think you'll find that find of information on any public site

[Edited 2008-04-03 16:26:20]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
EA772LR
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RE: Fan Tip Diameter For The CF34-8E

Fri Apr 04, 2008 4:12 pm

Thanks EMBQA, I appreciate you sharing the info  thumbsup 
We often judge others by their actions, but ourselves by our intentions.
 
flyf15
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RE: Fan Tip Diameter For The CF34-8E

Fri Apr 04, 2008 6:37 pm

Anyone know the stats for the -3B1? Also, how many RPMs is 100% N1? 100% N2?
 
EMBQA
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RE: Fan Tip Diameter For The CF34-8E

Fri Apr 04, 2008 6:59 pm

Quoting Flyf15 (Reply 10):
Anyone know the stats for the -3B1? Also, how many RPMs is 100% N1? 100% N2?

You'll need Acrobat to read it

http://www.airweb.faa.gov/Regulatory...EF86256FD900674745/$FILE/E15NE.pdf

But for those that don't.......

N1...7,400rpm
N2...17,820rpm

[Edited 2008-04-04 12:03:01]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
tdscanuck
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RE: Fan Tip Diameter For The CF34-8E

Sat Apr 05, 2008 5:52 am



Quoting Flyf15 (Reply 10):
Anyone know the stats for the -3B1? Also, how many RPMs is 100% N1? 100% N2?



Quoting Flyf15 (Reply 10):
N1...7,400rpm
N2...17,820rpm

Slight caveat...those are maximum N1. There's usually a trimmer somewhere in the system that's set during the engine test cell run to get the thrust exactly right. As a result, actual 100% N1 on any particular engine can be lower.

Tom.

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