dennys
Topic Author
Posts: 671
Joined: Tue May 08, 2001 11:19 pm

Q.VARIG 747-341s And 747-441s Engines Design.

Sat May 05, 2012 8:08 pm

Hi guys , can you help me .


Had the 747-341s the same engines design as the 747-441s?
They really seem to be closed one to the other .
The same case was on the Air India's 743s and 744s .

Many thanks your help
kind regards
dennys
 
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jetmech
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Joined: Wed Mar 29, 2006 2:14 am

RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 12:51 am

According to these links;

http://www.planespotters.net/Product...7,TF-ATI-Air-Atlanta-Icelandic.php
http://jetphotos.net/census/aircraft2.php?msnid=747-24956

The 341 is powered by the CF6-80CB1, whilst the 441 is powered by the CF6-80C2B1F. GE aviation lists the primary difference as a higher pressure ratio and thrust for the B1F;

http://www.geaviation.com/engines/commercial/comparison_turbofan.html

I suspect another difference may be in the engine control. The B1 may have a hydro-mechanical fuel control, whilst the B1F may be FADEC. The Boeing 747-337M is powered by the CF6-80C2B1, with the 437 powered by the PW-4056.

http://www.planespotters.net/Product...ing/747/24159,VT-EPW-Air-India.php
http://www.planespotters.net/Product...ing/747/28094,VT-EVA-Air-India.php

Regards, JetMech

[Edited 2012-05-05 18:00:35]
JetMech split the back of his pants. He can feel the wind in his hair :shock: .
 
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Jetlagged
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RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 1:13 am

Some late production 747-300s had GE CF6-80C2B1 engines, the same type as installed on many 747-400s. The last three Varig 747-341s had them as did two Air India 747-337s. Varig 747-441s had the same engine, but with FADEC (CF6-80C2B1F). Air India's 747-437s have a different engine, the PW4056.

edit: JetMech beat me to it! AFAIK, the only physical difference between B1 and B1F is FADEC. The B1F has a slightly higher thrust rating.

[Edited 2012-05-05 18:22:17]
The glass isn't half empty, or half full, it's twice as big as it needs to be.
 
dennys
Topic Author
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RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 4:34 am

Many Many thanks ! You are brllient passionnated people .
Cheers
dennys
 
Max Q
Posts: 5770
Joined: Wed May 09, 2001 12:40 pm

RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 5:44 am

Quoting Jetlagged (Reply 2):


Some late production 747-300s had GE CF6-80C2B1 engines, the same type as installed on many 747-400s. The last three Varig 747-341s had them as did two Air India 747-337s. Varig 747-441s had the same engine, but with FADEC (CF6-80C2B1F). Air India's 747-437s have a different engine, the PW4056.

edit: JetMech beat me to it! AFAIK, the only physical difference between B1 and B1F is FADEC. The B1F has a slightly higher thrust rating.

Are these the same engines installed on Air Force One ?



I know 'any aircraft carrying the President bla, bla, bla'
The best contribution to safety is a competent Pilot.
 
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Starlionblue
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RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 10:50 am

Quoting Max Q (Reply 4):
Quoting Jetlagged (Reply 2):


Some late production 747-300s had GE CF6-80C2B1 engines, the same type as installed on many 747-400s. The last three Varig 747-341s had them as did two Air India 747-337s. Varig 747-441s had the same engine, but with FADEC (CF6-80C2B1F). Air India's 747-437s have a different engine, the PW4056.

edit: JetMech beat me to it! AFAIK, the only physical difference between B1 and B1F is FADEC. The B1F has a slightly higher thrust rating.

Are these the same engines installed on Air Force One ?



I know 'any aircraft carrying the President bla, bla, bla'

The VC-25A (bla, bla bla) have the CF6-80C2B1F. 
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
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747classic
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RE: Q.VARIG 747-341s And 747-441s Engines Design.

Sun May 06, 2012 11:24 am

The following B743/CF6-80C2B1 are delivered by Boeing :

747-3D7------ MSN 23721 - L/N 681 Thai
747-3D7------ MSN 23732 - L/N 688 Thai
747-341-------MSN 24106 - L/N 701 Varig
747-341-------MSN 24107 - L/N 702 Varig
747-341-------MSN 24108 - L/N 703 Varig
747-337M---- MSN 24159 - L/N 711 Air India
747-337M---- MSN 24160 - L/N 719 Air India

Also two B742/CF6-80C2B1 are delivered :

747-2G4B-----MSN 23824 - L/N 679 USAF
747-2G4B-----MSN 23825 - L/N 685 USAF

All CF6-80C2 versions without -F are mechanical controlled with a main engine control (MEC) and a Power Management Control (PMC), a digital supervisory controller, jointly acting as the engine controlling system.
Mechanically controlled engines can have their thrust rating changed by replacing the MEC and the PMC.

The CF6-80C2B1F (as installed on the 744) introduced the first FADEC system on the CF6 family. Such electronically controlled engines have additional sensors installed on the engine, allowing a more precise control of systems, thereby decreasing fuel consumption (TSFC). On such engines the MEC and PMC are substituted by the Electronic Engine Control (EEC) . Engine thrust rating can be changed by only replacing the rating plug at the EEC.

MEC/PMC controlled CF6-80C2 engines cannot be modified to FADEC standard.

[Edited 2012-05-06 05:00:06]
Operating a twin over the ocean, you're always one engine failure from a total emergency.

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