BOEING747400 From United States of America, joined Sep 2001, 319 posts, RR: 0 Posted (11 years 4 months 3 weeks 6 days 8 hours ago) and read 1530 times:
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 From , joined Dec 1969, posts, RR: Reply 1, posted (11 years 4 months 3 weeks 6 days 8 hours ago) and read 1499 times:
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.
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