trnswrld
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Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 3:24 am

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
 
goboeing
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 3:36 am

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
 
Arsenal@LHR
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 3:53 am

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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sabenapilot
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 4:19 am

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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[Edited 2003-07-08 21:24:59]
 
744rules
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 4:51 am

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.
 
A330DAT
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 5:59 am

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.

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emiratesa345
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:06 am

"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
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DC10Tony
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:11 am

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.
 
emiratesa345
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:18 am

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
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Shawn Patrick
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:23 am

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
 
sabenapilot
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:31 am

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.


 
star_world
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:36 am

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
 
sabenapilot
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:47 am

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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eg777er
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:55 am

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.
 
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ERJ135
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:16 pm

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!
 
ZK-NBT
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 6:59 pm

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!
 
Shenzhen
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 7:03 pm

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.

 
star_world
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Wed Jul 09, 2003 8:37 pm

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
 
Shenzhen
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 11:11 am

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...
 
doug_or
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 12:10 pm

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?
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B727-200
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 1:40 pm


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.

 
corsairf/a
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 4:20 pm

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.
 
deskdriver
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 4:26 pm

The slope in the cabin is only found on the A300
 
airmale
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 8:07 pm

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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Leej
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 9:02 pm

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.

 
matt
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Thu Jul 10, 2003 10:19 pm

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 maker is the best, I do think that the Boeings look sleeker without the slope.
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Greg
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Fri Jul 11, 2003 3:49 am

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 cargo hold (Source: Airbus).

It is not designed to make f/a's more comfortable because the planes fly a trifle nose high (gimme a break!).

When converted or ordered as freighers...the rear flow is lowered approximatley three inches to remain level so automated cargo equipment and rollers can perform as designed (Source: Airbus)
 
Boeing4ever
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Fri Jul 11, 2003 1:20 pm

Why Does Rear Section Of Airbus Aircraft Slope Up?

Well, the VIRGIN Atlantic Airbuses are probably presenting for their first time!  Big grin  Big thumbs up  Smokin cool

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DC10GUY
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Fri Jul 11, 2003 1:40 pm

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 up the slope in the back of the airplane. And most of the slope is over the bulk cargo so I don't think its for the LD3 containers in the belly. The A300 & A310 are both about the same.
Next time try the old "dirty Sanchez" She'll love it !!!
 
Greg
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RE: Why Does Rear Section Of Airbus Aircraft Slope Up?

Sat Jul 12, 2003 12:14 am

The freighter conversions have flat floors according to Airbus--there is no slope.