UAL Bagsmasher
Topic Author
Posts: 1839
Joined: Wed Sep 08, 1999 12:52 pm

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
Posts: 86
Joined: Mon Sep 24, 2001 9:23 am

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
 
UAL Bagsmasher
Topic Author
Posts: 1839
Joined: Wed Sep 08, 1999 12:52 pm

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
Posts: 13916
Joined: Sun Oct 26, 2003 5:25 am

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
Je Suis Charlie et je suis Ahmet aussi
 
AJ
Posts: 2295
Joined: Wed Nov 03, 1999 3:54 pm

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
Happy contrails  Smile
(s) Skipper
 
MD-11 forever
Posts: 550
Joined: Wed Mar 14, 2001 12:15 am

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
Posts: 788
Joined: Sun Apr 08, 2001 4:11 am

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
Posts: 21
Joined: Sat Mar 06, 2004 12:58 am

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
Posts: 86
Joined: Mon Sep 24, 2001 9:23 am

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
 
UAL Bagsmasher
Topic Author
Posts: 1839
Joined: Wed Sep 08, 1999 12:52 pm

RE: DC-10 N1 Vs EPR

Sun Mar 14, 2004 6:19 am

Thanks much for the answers!
 
DC-10Tech
Posts: 291
Joined: Fri Jun 15, 2001 6:40 pm

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.
Forums.AMTCentral.com

Who is online

Users browsing this forum: adools, bentzur and 16 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos