UAL Bagsmasher
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DC-10 N1 Vs EPR

Tue Mar 09, 2004 10:50 am

Is it true that DC-10 crews use N1 to set thrust rather than EPR? I remember hearing that somewhere along the way at UA. Can anyone confirm this?
 
nightflyer
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RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 11:20 am

We don't have EPR on the -10's and -30's, just N1. I'm not familiar with the -40's but they might have EPR's since that have the Pratts.


NightFlyer
 
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RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 11:28 am

Isn't EPR a more direct measurement of thrust than N1? How do they take that into account?
 
MD11Engineer
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RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 1:41 pm

On high bypass engines 90% of the thrust come from the fan, which is directly proportional to N1 speed, so EPR is not really needed. I don´t know why P&W still insist on using EPR.

Jan
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AJ
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RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 1:52 pm

DC-10-10/-30 would have N1, DC-10-40 would have EPR!
 
Guest

RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 3:39 pm

P&W engines (JT9) use EPR as primary power setting means.
GE engines (CF6) use N1, no EPR available on these engines>
xxx
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MD-11 forever
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RE: DC-10 N1 Vs EPR

Tue Mar 09, 2004 3:58 pm

True, GE(and CFM 56) engines are controlled by N1 speed, while Pratt and RR are controlled by EPR.

Cheers, Thomas

[Edited 2004-03-09 07:59:43]
 
musang
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RE: DC-10 N1 Vs EPR

Wed Mar 10, 2004 4:35 am

737 3/4/500s, and Avro RJ 100/146s have no EPR gages and use N1.

Regards - Musang
 
3204ever
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RE: DC-10 N1 Vs EPR

Wed Mar 10, 2004 4:52 am



Airbus 320 series with IAE V2500,use EPR as primary power setting.
 
nightflyer
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RE: DC-10 N1 Vs EPR

Wed Mar 10, 2004 7:16 am

We have MD11's with GE's that use N1's and our PW's use EPR. All of our MD10's use N1.


NightFlyer
 
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RE: DC-10 N1 Vs EPR

Sun Mar 14, 2004 6:19 am

Thanks much for the answers!
 
DC-10Tech
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RE: DC-10 N1 Vs EPR

Sun Mar 14, 2004 8:28 pm

Some DC-10's were delivered with EPR. I don't know how long the GE powered 10's used EPR, but they don't any more.

As a general rule, GE uses N1, P&W uses EPR, regardless of aircraft type.
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