BOEING747400
Topic Author
Posts: 292
Joined: Tue Sep 11, 2001 3:47 pm

Engine Differences

Wed Dec 26, 2001 1:43 pm

Can you please describe the differences between the following engines?:

a) GE CF6-80C2B1F & GE CF6-80C2B5F
b) RR RB211-524G, RR RB211-524H, RR RB211-524H2, RR RB211-524G/H, and RR RB211-524G/H-T
c) PW 4056 & PW 4062

I'm not clear on what the technical differences between these different types of engines are so I'd very much appreciate it if you could teach me the subtle differences between them. I'm trying to learn more about these engines. Thanks.

Notes from Bill Harms:

Saudia Arabian B744 (GE CF6-80C2B5F)
Thai B744 (GE CF6-80C2B1F)

Air New Zealand B744 (RR RB211-524G/H-T)
British Airways B744 (RR RB211-524H2)
Cathay Pacific B744 (RR RB211-524G/H)
Qantas B744 (RR RB211-524G)
South African B744 (RR RB211-524H)


 
ILS
Posts: 2291
Joined: Fri Nov 09, 2001 2:34 am

RE: Engine Differences

Wed Dec 26, 2001 1:57 pm

In order for GE CF's:

MODEL/DESIGNATION
MANUFACTURER
TYPE
No. OF FAN/COMPRESSOR STAGES
No.OF TURBINE STAGES(HP/LP)
POWER AT SEA LEVEL
PRESSURE RATIO AT MAX.POWER
APPLICATION/REMARKS

CF6-80C2B1F
General Electric Co., GE Aircraft Engines
Axial Flow, Fan
1, 4, 14
2, 5
58,000 lb. t.
29.9
747-400.

CF6-80C2B5F
General Electric Co., GE Aircraft Engines
Axial Flow, Fan
1, 4, 14
2, 5
60,800 lb. t.
31.4
747-400.

The difference between the two GE CF's are the power at sea level and the pressure ration at max power.

On the RR's, the blades are different shapes and sizes.

The PW 4056s give off 57,150 lbs of thrust while the 4062s give off 60,700 lbs of thrust.

This is a good website.
http://www.bh.com/companions/aerodata/appendices/data-b/default.htm

Those are the main differences.

Hope this helps.

 Big thumbs up

ILS

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