Engine Size: 747-400 & Airbus A380 Dimensions

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Discussion Overview

The discussion centers around the dimensions and specifications of the engines used in the Boeing 747-400 and Airbus A380 aircraft. Participants explore various engine models, their diameters, thrust ratings, and manufacturer details, focusing on both technical specifications and comparative sizes.

Discussion Character

  • Technical explanation
  • Exploratory
  • Debate/contested

Main Points Raised

  • One participant inquires about the diameter of the 747-400 engines, noting the potential differences due to various manufacturers.
  • Another participant provides detailed specifications for several engine models used in the 747-400, indicating that the diameters are around 2 meters.
  • Links to manufacturer websites for General Electric and Pratt & Whitney are shared, with specific mention of the PW4000-94 fan tip diameter being approximately 2.39 meters.
  • The fan diameter of the GP7000 engine for the A380 is noted to be 116 inches.
  • There is a suggestion that General Electric produces the largest engines, while the size of Rolls Royce engines is questioned, with a participant estimating the A380 engines to be 9 feet wide.
  • A clarification is made that the mentioned diameters refer to the fan diameter, while the actual core diameter is likely smaller.
  • Discussion includes the thrust ratings of the engines, with a participant confirming that the 70,000 lbs thrust is per engine for the latest 747-400 models.
  • Further details are provided about the GP7000 engine's thrust ratings and the historical context of thrust ratings for CF6 engines.

Areas of Agreement / Disagreement

Participants express varying views on the sizes and specifications of the engines, with no clear consensus on the exact dimensions or comparisons between different manufacturers. Some points are clarified, but uncertainty remains regarding the exact sizes of Rolls Royce engines and the implications of thrust ratings.

Contextual Notes

Participants reference various engine models and their specifications, but there are limitations in the discussion regarding the definitions of diameters and thrust ratings, as well as the potential for variations based on different configurations.

Badass
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Does anyone know the diameter of the 747-400 engines used please? Obviously there are different manufacturers but I wouldn't have thought that would alter the size. What about the size of the new Airbus A380 engines as well?:confused:
 
Engineering news on Phys.org
powerplants..
"Four 252.4kN (56,750lb) Pratt & Whitney PW-4056 turbofans or 266.9kN (60,000lb) PW-4060s,
or 275.8kN (62,000lb) PW-4062s, 252.4kN (56,750lb) General Electric CF6-80-C2B1Fs
or 273.6kN (61,500lb) CF6-80-C2B1F1s or -80-C2B7Fs,
or 258.0kN (58,000lb) RollsRoyce RB-211-524G
or -524Hs, or 262.4 to 266.9kN (59 to 60,000lb) RB-211-524G/H-Ts."
(from airliners.net)

The diamemeter are all around 2 meter.
 
Try this place - http://www.geae.com/ for GE jet engines
http://www.geae.com/engines/commercial/cf6/index.html

and this one for Pratt & Whitney
http://www.pratt-whitney.com/prod_commercial.asp
http://www.pratt-whitney.com/prod_comm_pw4000_94.asp
PW4000-94 Fan tip diameter: 94 in ~ 2.39 m
 
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The fan diameter on the GP7000 is 116 in.
http://www.geae.com/engines/commercial/gp7000/
 
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So it seems that General Electric produce the largest engines ( funny, I thought they were all standard) which makes Rolls Royce engines I don't know how large though. As for the A380 I think they could be 9 ft wide.:smile:
 
As a note, that is the fan diameter. The actual core diameter will be much less.
 
Badass said:
So it seems that General Electric produce the largest engines ( funny, I thought they were all standard) which makes Rolls Royce engines I don't know how large though. As for the A380 I think they could be 9 ft wide.:smile:
Rolls Royce's Trent Engines are similarly large - 116 inch fan (high bypass) for the A380.
http://www.rolls-royce.com/media/product/trent900.jsp

In general, RR products - http://www.rolls-royce.com/media/product/default.jsp

See Trent 800 for 777 engine - http://www.rolls-royce.com/media/product/trent800.jsp

See RB211-524 & -22B for 747 engine - http://www.rolls-royce.com/media/product/rb211524.jsp
 
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The latest 747-400 models have an engine thrust of 70000 lbs. Is this per engine though? If it is I did work it out and know the answer but was wondering if it was per engine. It seems that you certainly wouldn't want to be standing near these engines when on idle.
 
Badass said:
The latest 747-400 models have an engine thrust of 70000 lbs. Is this per engine though? If it is I did work it out and know the answer but was wondering if it was per engine. It seems that you certainly wouldn't want to be standing near these engines when on idle.
The 70,000 lbs is per engine! The GP7000 is rated at 81,500 lbs. Jet engines have a clearance area fore and aft. One does not want to get too close to either end. Idle is not too bad, but with thrust the exhaust will 'blow' one away. :biggrin:

http://www.enginealliance.com/images/gpfeat_08.gif

Starting in 1971 with the 40,000 lb. thrust CF6-6 and continuing today with our newest, highest thrust CF6 engine, the 72,000 lb. thrust CF6-80E1, more CF6 engines have been produced and have flown more hours than any other high bypass engine family ever produced.
GE - http://www.geae.com/engines/commercial/cf6/index.html

The Engine Alliance is offering the GP7200 for the Airbus A380 passenger and freighter configurations. The GP7200 will initially certify at 76,500 lb. (340 kN) of thrust and subsequently at 81,500 lb. (363 kN) of thrust. The engine will be offered with two ratings appropriate for the various A380 configurations and take-off weights: GP7270 for the 560 tonne variant, and GP7277 for the 590 tonne A380-800 freighter.
GE - http://www.geae.com/engines/commercial/gp7000/index.html
 
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