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Why Does Rear Section Of Airbus Aircraft Slope Up?  
User currently offlineTrnsWrld From United States of America, joined May 1999, 954 posts, RR: 0
Posted (11 years 4 months 3 weeks 2 days 8 hours ago) and read 5694 times:

I am sure this question has been asked many times on the forum but I just dont know what keywords to type in to find something like this. So I will ask myself. Why does the rear section of larger Airbus aircraft slope up? It is most obvious by looking at the passenger windows. My only thoughts are to give a little more tail clearance for say maybe tailstrikes. I dunno, someone fill me in here.
Thanks a lot


29 replies: All unread, showing first 25:
 
User currently offlineGoboeing From United States of America, joined Jun 2000, 2715 posts, RR: 15
Reply 1, posted (11 years 4 months 3 weeks 2 days 8 hours ago) and read 5646 times:

This has been discussed, but I wouldn't know what to type in either.

The answer is that the tails of airbus' aren't actually sloped up; it's an illusion. It is due to the shape of the aircraft's tail view from above that actually causes this illusion. Airbus jets are wide from front to as far back as possible. This is to allow as much space inside as possible for cargo, seats, etc. When seen diagonally from the front, it looks like the windows in the last few rows to slope up.

Maybe a good side view could help prove this.

Nick


User currently offlineArsenal@LHR From United Kingdom, joined Mar 2001, 7792 posts, RR: 20
Reply 2, posted (11 years 4 months 3 weeks 2 days 8 hours ago) and read 5597 times:
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The rear section of Airbus widebodies do slope upwards, simply to accomodate LD3 cargo containers.

Look at the window lining of the A330, you'll see it slides upwards.


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In Arsene we trust!!
User currently offlineSabenapilot From Belgium, joined Feb 2000, 2724 posts, RR: 46
Reply 3, posted (11 years 4 months 3 weeks 2 days 7 hours ago) and read 5506 times:

That's it: to accommodate standard LD3 cargo containers in the cargo holds till all the way at the back. Flight attendants having to push trolleys from mid galley to rear galley can tell you that it is NOT just an optical illusion, although it is most obvious when seen from outside at an angle of about 45 degrees (dunno why...)

I can't say this is my favourite airline, but this photo best proves the point above, so...

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Photo © Peter Unmuth - VAP



[Edited 2003-07-08 21:24:59]

User currently offline744rules From Belgium, joined Mar 2002, 407 posts, RR: 0
Reply 4, posted (11 years 4 months 3 weeks 2 days 7 hours ago) and read 5435 times:

I heard the same from flying loadmasters on A300F. The most aft containers/pallets on the maindeck have to be pushed up. It is not an optical illusion.

User currently offlineA330DAT From Belgium, joined Nov 2001, 469 posts, RR: 1
Reply 5, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5363 times:

LD3's fine. That's one reason. But there is another!!!

In flight (at cruising altitude) the nose pitch of an aircraft is slightly upwards (at an angle).

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On the ground the floor is flat (level) but in flight when you go from the back to the front you would be going up-hill. This is the case in (amongst others) Boeing, Lockheed or McDonnell Douglas aircraft... The Airbus widebody aircraft floors however level off in flight and sort of form a "dish" shape and reduce the angle. This is easier indeed for example to walk OR to push trolleys around.

 Smokin cool


User currently offlineEmiratesA345 From Canada, joined Jun 2003, 2123 posts, RR: 9
Reply 6, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5341 times:

"Flight attendants having to push trolleys from mid galley to rear galley can tell you that it is NOT just an optical illusion"

I doubt that it is at such a slope that they actually get a work out from doing it. Then again, I haven't done it so just assuming.

EmiratesA345  Smile/happy/getting dizzy



You and I were meant to fly, Air Canada!
User currently offlineDC10Tony From United States of America, joined May 2001, 1012 posts, RR: 0
Reply 7, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5313 times:

It's the same way with 747s.

Both Airbus widebody and 747 fuselages are straight on the top, while on the 757, 767, and 777 the top of the fuselage slopes down to the rear of the plane.

I don't think the Airbus design has anything to do with accomodating LD3s.


User currently offlineEmiratesA345 From Canada, joined Jun 2003, 2123 posts, RR: 9
Reply 8, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5275 times:

I think it's just an optical illusion.

Draw small circles on a piece of paper in a perfectly straight line. Then bend the paper (in the way the rear end of an airplane bends) and try looking at it from different angles. You will notice that the bent part looks as if it is slightly higher.


Maybe it's just me. Try and let us know what you saw.

EmiratesA345 Smile/happy/getting dizzy



You and I were meant to fly, Air Canada!
User currently offlineShawn Patrick From United States of America, joined Jan 2000, 2608 posts, RR: 16
Reply 9, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5259 times:

From a visual standpoint, this is one of the reasons why I think the Airbus widebodies are the ugliest widebody airliners in the world. But that's just me.  Big grin

User currently offlineSabenapilot From Belgium, joined Feb 2000, 2724 posts, RR: 46
Reply 10, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5232 times:

Hey guys, don't start the discussion all over again...

The fuselage on Airbus wide bodies DOES really slope upwards, it is not an optical illusion... check a technical drawing of any Airbus and you can find proof of it.




User currently offlineStar_world From Ireland, joined Jun 2001, 1234 posts, RR: 0
Reply 11, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5208 times:

Emirates345, it's not an optical illusion I'm afraid, it actually is sloped up  Smile

If you go to http://www.airbus.com/media/drawings.asp you can download vector images of the side view of the A330 / 340, you'll see it quite clearly on those.

star_world


User currently offlineSabenapilot From Belgium, joined Feb 2000, 2724 posts, RR: 46
Reply 12, posted (11 years 4 months 3 weeks 2 days 5 hours ago) and read 5168 times:

Ok, it took me a while before I could find a good picture of a cabin interior of an A330 without intermediate galleys or cabin walls, but I found one.... taken on a charter airline!  Smile/happy/getting dizzy

Just have a look at the seats left of the aisle... see how the last 7 or so rows go up?


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User currently offlineEg777er From United Kingdom, joined Feb 2000, 1837 posts, RR: 14
Reply 13, posted (11 years 4 months 3 weeks 2 days 4 hours ago) and read 5151 times:

I remember when Lufthansa first took delivery of their A340s.

The front landing gear leg compressed to a greater degree than anticipated, which, coupled with the slope of the airframe, meant that Door 4 was too high above the tarmac to be reached by Lufthansa's catering trucks.


User currently offlineERJ135 From Australia, joined Nov 2000, 684 posts, RR: 1
Reply 14, posted (11 years 4 months 3 weeks 1 day 17 hours ago) and read 4946 times:

A lot of interesting yes's and no's but still no answer as to why?
Okay firstly yes it does slope upwards on all A300, A310, A330 and A340 aircraft. No it's not a design fault and not specifically to house LD3's or to get the FA's to push trolley's up hill.
It's a simple matter of space utilization. Sloping the floor upwards slightly utilizes the maximum available cabin width in that part of the aircraft.



I remember when the DC-3 was new!
User currently offlineZK-NBT From New Zealand, joined Oct 2000, 5359 posts, RR: 11
Reply 15, posted (11 years 4 months 3 weeks 1 day 16 hours ago) and read 4887 times:

Yes it is true that the inside of widebody Airbuses slope upwards!

Never flown an Airbus but have walked through a QF A330 and AR A340, kind of weird! I will get to fly on 1 of these weird aircraft oneday I guess!


User currently offlineShenzhen From United States of America, joined Jun 2003, 1712 posts, RR: 2
Reply 16, posted (11 years 4 months 3 weeks 1 day 16 hours ago) and read 4878 times:

it looks to me like only the floor/windows are sloped, thus giving more room in the aft cargo where the lower part of the fuselage tapers up.



User currently offlineStar_world From Ireland, joined Jun 2001, 1234 posts, RR: 0
Reply 17, posted (11 years 4 months 3 weeks 1 day 15 hours ago) and read 4766 times:

Shenzhen - isn't that what we've been saying all along? The floor / windows are sloped to make the cargo area big enough to take LD3 containers in the rear section...

star_world


User currently offlineShenzhen From United States of America, joined Jun 2003, 1712 posts, RR: 2
Reply 18, posted (11 years 4 months 3 weeks 1 day ago) and read 4562 times:

Star,

Didn't see where you said just the floor/windows are sloped upward (not the fuselage). However, just throwing my two cents in, didn't know the thread was limited to 15 replies.


Regards...


User currently offlineDoug_or From United States of America, joined Mar 2000, 3437 posts, RR: 3
Reply 19, posted (11 years 4 months 3 weeks 23 hours ago) and read 4512 times:

I think some of the posts may have been confusing.

The fuesalage does not curve upward in any unsual way in airbus aircraft. the floor of the cabin, however, does.

yes?



When in doubt, one B pump off
User currently offlineB727-200 From Australia, joined Nov 1999, 1051 posts, RR: 3
Reply 20, posted (11 years 4 months 3 weeks 22 hours ago) and read 4446 times:


I thought it was for the placement of the rear galley (sits basically inside the tail cone). If they didn't ramp the main-deck floor then they would require a step up into the galley. I think the FA's would prefer a ramp to a step.

As for the windows - I think they keep them level with the floor for esthetic reasons only. If you have ever sat on a CRJ-200 you will know how uncomfortable it is to look out of windows that are down near your seat belt.

B727-200.



User currently offlineCorsairf/a From France, joined Oct 2000, 373 posts, RR: 1
Reply 21, posted (11 years 4 months 3 weeks 19 hours ago) and read 4368 times:

I do fly on the A330-200 2 or 3 times a month and I can say that there is no step to get to the rear galley, no problem to push a trolley from there to the cabin. Great plane to work on depend on the accommodation made by the airlines. Corsair 355 pax, AF 211 pax, Star 365.

User currently offlineDeskdriver From United Kingdom, joined Nov 2000, 45 posts, RR: 0
Reply 22, posted (11 years 4 months 3 weeks 19 hours ago) and read 4362 times:

The slope in the cabin is only found on the A300

User currently offlineAirmale From Botswana, joined Sep 2004, 380 posts, RR: 1
Reply 23, posted (11 years 4 months 3 weeks 15 hours ago) and read 4288 times:

When I flew on an A300 in 1984 I wondered why the seats at the rear were going a bit upwards.

Also the same has been applied to the later model Ilyushin IL86 and the new IL96, which looks like a four engined A310.

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[Edited 2003-07-10 13:25:47]


.....up there with the best!
User currently offlineLeej From United Kingdom, joined Apr 2001, 294 posts, RR: 0
Reply 24, posted (11 years 4 months 3 weeks 14 hours ago) and read 4237 times:

Found on all airbus widebodies -
Makes max use out of cabin diameter and length as the fuselage tapers up toward the rear, and allows max underfloor storage for the containers.
Thats it. Nothing more.



25 Matt : I have to agree with Shawn Patrick... the slope (in the windows) makes the Airbus look strange. Although I do not want to start a debate over which ma
26 Greg : Where do you kids get your info? Or do you not bother to reasearch anything? The floor slopes up gently to allow two more containers to fit in the car
27 Post contains images Boeing4ever : Why Does Rear Section Of Airbus Aircraft Slope Up? Well, the VIRGIN Atlantic Airbuses are probably presenting for their first time! B4e-Forever New Fr
28 Dc10guy : Because all the American built airplanes have flat floors ... Airbus has to be different .... At Fedex it is no big deal to push the back containers u
29 Greg : The freighter conversions have flat floors according to Airbus--there is no slope.
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