A388
Topic Author
Posts: 7252
Joined: Mon May 21, 2001 3:48 am

A380, What's The Real Breakthrough?

Sat Feb 01, 2003 4:53 am

I was talking with a friend about the A380 and we were discussing the breakthroughs of this new aircraft and whether the A380 will become a new milestone in the aviation industry. All I've read about the A380 so far is the new cockpit concept using laptops and new navigational systems using real-time information. I read that the Boeing 747-400ER also has a new radar using scans (Rockwell Collin's WXR-2100 Multiscan radar). Regarding the composite material, a new composite designed in the Netherlands and called Glare will also be used in the aviation industry for the first time. With the A380 being the first double decker, from the front to the end of the fuselage also is something new.

So my question is what are the breakthroughs in the A380. For example, I don't know much about the technology used in the engines.

Let's not start an A vs. B war, I'm just interested in what the new features in the A380 will be.

A388
 
Greg
Posts: 5539
Joined: Sat May 28, 2005 1:11 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 5:29 am

The A380 is not a revolutionary product. It wasn't designed to be. It will use the most of existing technologies--and push into some areas, primarily composites, where no commerical aircraft has gone before.

Fully, 11-12% of the seat mile cost savings are simply from the increase in capacity--and this is according to Airbus. Only 5% of the savings are from new techologies and improvements in aerodynamics, manufaturing, etc. (although that is still significant when added up). All in all, it still makes an attractive package provided capacity and demand are equal.

I think it's greatest battle will be empty weight.

The only oddity I read about is that there is an artificial centre of gravity maintained while flying. I don't understand the concept or the repercussions..possibly someone can enlighten me?



 
LHMark
Posts: 7048
Joined: Fri Jan 21, 2000 2:18 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 5:34 am

Can't they alter the center of gravity by transferring fuel from tank to tank?
"Sympathy is something that shouldn't be bestowed on the Yankees. Apparently it angers them." - Bob Feller
 
gigneil
Posts: 14133
Joined: Fri Nov 08, 2002 10:25 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 5:55 am

The A330 and A340 modify their CoG in this fashion. There are fuel savings related to it, but I don't understand how that works exactly.

The A320 series has a guide for loading of baggage in what I think are its three compartments, for the same CoG distribution.

N
 
AvObserver
Posts: 2435
Joined: Sat Apr 06, 2002 7:40 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 6:11 am

I think the A380 is more of an evolutionary, rather than revolutionary product. While it does push the materials state of the art, it's capacity increase over the 747 is not a really huge leap. It's a lot less of a jump than going from the 707 to the 747 was. The architecture is largely scaled up A340-a good thing, since most Airbus products have been based in some way on past successes. It's smart that they're taking a relatively conservative approach in designing their new superjumbo, this maximizes its' chances of success while minimizing technical risks, which are still significant, given the unprecedented scale of the project.
 
LHMark
Posts: 7048
Joined: Fri Jan 21, 2000 2:18 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 6:12 am

CoG is vital to keeping aircraft in flight. A shift in CoG can cause a crash.
"Sympathy is something that shouldn't be bestowed on the Yankees. Apparently it angers them." - Bob Feller
 
Greg
Posts: 5539
Joined: Sat May 28, 2005 1:11 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 6:22 am

I understand the concept of Center of Gravity. What I don't understand is why the nature of the A380 is be artificially stablized through the flight regime.
I wasn't speaking specifically of fuel transfer, etc....

This would mean to me that the design..without interaction from trim controls, etc. would be inherently unstable (which may be too strong a word).



 
brons2
Posts: 2462
Joined: Tue Sep 25, 2001 1:02 pm

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 7:02 am

Considering all the newer Airbuses are FBW, some inherent instability might not be so bad, because it can be controlled through software....
Firings, if well done, are good for employee morale.
 
Klaus
Posts: 20649
Joined: Wed Jul 11, 2001 7:41 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 10:48 am

The Airbus CG control system was discussed in the Tech/Ops forum a while ago:

http://www.airliners.net/discussions/tech_ops/read.main/55464/

Apparently, it helps saving a little fuel (about 2.5%) by shifting fuel to and from a tail tank. Achieving the same effect by using elevator trim would increase drag. And shifting the CG (slightly!) reduces the required elevator trim and therefore drag.

The shift is small enough to keep the aircraft within the inherently stable envelope, obviously.
 
gigneil
Posts: 14133
Joined: Fri Nov 08, 2002 10:25 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 11:29 am

I consider the extensive use of Glare a pretty big breakthrough, although not a revolutionary one in general.

While glare is a revolutionary material in and of itself - stronger and more resilient than either carbon fiber or aluminum alone, easily repairable, even self healing to an extent, and almost impossible to delaminate - it certainly isn't Airbus' revolution but the scientists who developed it.

I'd be surprised if our new pet the 7E7 didn't incorporate Glare or a similar material as well, although I am not aware of a material that meets the high standard Glare sets.

I assume Airbus does the same kind of stress tests that Boeing does... I can't wait to see the results.

N
 
airsicknessbag
Posts: 4626
Joined: Thu Aug 17, 2000 2:45 am

RE: A380, What's The Real Breakthrough?

Sat Feb 01, 2003 10:03 pm

It´s all about the size. The A380 will continue the tradition of 707 and 747 - both had twice the capacity of their respective biggest contemporary - just like the 380.

Daniel Smile

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