QANTAS747-438
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A330/A340 Engine Placement On Wing

Sat Aug 31, 2013 8:15 am

For comparison, where (what percentage on the wing) are the engines on an A330-200 located versus an A340-200? Same for an A330-300 and A340-300.
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Starlionblue
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RE: A330/A340 Engine Placement On Wing

Sat Aug 31, 2013 8:29 am

The inner engines on the 340 are in exactly the same location as the engines on the 330. It is the same wing. That was one of the main points that made it a common program.

The -200 and -300 variants have the same wing for 330 and 340. The -500 and -600 have more span and chord, with a tapered root insert, though the chord at the tip is the same.

Externally, the only bit that is different on the -200 and -300, apart from engines and center gear leg, is the size of the fin and rudder. The 330 has a taller unit since an engine out requires more rudder/fin authority.

Structurally, the 340 has a lighter wing.

Making a 330 tanker was relatively simple because Airbus could put the tanking outlets in the same place as the 340 outer engines. Since it has the same structure as the 340, fuel plumbing was already catered for in that location.

[Edited 2013-08-31 01:33:40]

[Edited 2013-08-31 01:35:31]

[Edited 2013-08-31 01:38:20]

[Edited 2013-08-31 01:39:00]
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LH707330
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RE: A330/A340 Engine Placement On Wing

Mon Sep 02, 2013 9:17 pm

Quoting Starlionblue (Reply 1):
Externally, the only bit that is different on the -200 and -300, apart from engines and center gear leg, is the size of the fin and rudder. The 330 has a taller unit since an engine out requires more rudder/fin authority.

Not quite, both the 300s and the A340-200 have the same fin, and the 330-200 has a taller one. The later 330-200s also have the same fin as the 340-5/600, which is slightly taller than the -300 fins but shorter than the early 330-200 fins, and shorter in chord. This there are three fins:
short fin: 333, 342, 343
tall fin: 332 (section added atop -300 fin)
large fin: 332 (late), 345, 346 (medium height, longer chord)
 
QANTAS747-438
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RE: A330/A340 Engine Placement On Wing

Mon Sep 02, 2013 10:58 pm

I heard somewhere that the 744s engines are placed at 39% and 60% on the wing in terms of length starting from the fuselage going outward. Any similar info on that for the A330s/A340s?
My posts/replies are strictly my opinion and not that of any company, organization, or Southwest Airlines.
 
LH707330
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RE: A330/A340 Engine Placement On Wing

Tue Sep 03, 2013 8:18 pm

Quoting QANTAS747-438 (Reply 3):
I heard somewhere that the 744s engines are placed at 39% and 60% on the wing in terms of length starting from the fuselage going outward. Any similar info on that for the A330s/A340s?

Using my mk.1 eyeball, the 340's inboards are relatively further inboard, and the outboards further outboard, at least on the 343. The 345/346 with the tip extension have slightly different proportions.
 
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Starlionblue
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RE: A330/A340 Engine Placement On Wing

Tue Sep 03, 2013 9:13 pm

Quoting LH707330 (Reply 4):
The 345/346 with the tip extension have slightly different proportions.

The 345/346 does not have a tip extension. It has a tapered root insert. A tapered triangular section was inserted in the center; thick at the root and tapering off a ways outboard along the span. This gave both more chord, particularly close to the root, and more span.
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speedygonzales
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RE: A330/A340 Engine Placement On Wing

Wed Sep 04, 2013 9:00 am

Distance from aircraft center line to engine center line:
200/300:
Inboard: 9,37m
Outboard: 19,27m
Wingtip: 30,15m

500/600:
Inboard: 9,37m
Outboard: 19,27m
Wingtip: 31,73m

http://www.airbus.com/fileadmin/medi.../Airbus-AC-A340-200300-Apr2013.pdf
http://www.airbus.com/fileadmin/medi.../Airbus-AC-A340-500600-Apr2013.pdf
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dandaire
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RE: A330/A340 Engine Placement On Wing

Wed Sep 04, 2013 6:34 pm

Quoting Starlionblue (Reply 1):
The -500 and -600 have more span and chord, with a tapered root insert, though the chord at the tip is the same.
Quoting Starlionblue (Reply 5):
The 345/346 does not have a tip extension. It has a tapered root insert. A tapered triangular section was inserted in the center; thick at the root and tapering off a ways outboard along the span. This gave both more chord, particularly close to the root, and more span.

The A340-600 wing did not have a tapered root insert, it was a completely new larger wing, it is a bit of a myth that the -500/600 wing was a modified -200/300 wing. It was a new redesigned much larger wing.

A343 Vs. A346 Wings (by na Jul 18 2011 in Tech Ops)?threadid=302153&searchid=302713&s=a340+600+wings#ID302713
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Starlionblue
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RE: A330/A340 Engine Placement On Wing

Wed Sep 04, 2013 7:43 pm

Quoting dandaire (Reply 7):
The A340-600 wing did not have a tapered root insert, it was a completely new larger wing, it is a bit of a myth that the -500/600 wing was a modified -200/300 wing. It was a new redesigned much larger wing.

I stand corrected.
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