No. Of Aisles In Superjumbos

Thu Feb 10, 2000 9:10 pm

Hi All!

I hope I am not starting a topic that has already been discussed frequently, but I am rather new to this forum so here is my question anyway:

The bigger the planes get, the wider they get, right? Therefore planes like the A3XX and other superjumbos will be considerably wider than the 747. So, consequently they will reach a point when two aisles is not enough. Fast evacuation is already almost utopic in a 3-4-3 configuration, so theoretically the number of aisles should be increased. But three aisles is impossible (being asymetric and causing potential hazards in evacuation situations) so how many aisles will the superjumbos have? 4? 6? 2?

I hope this is not a stupid question, but it is something that I have been wondering about several times.
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RE: No. Of Aisles In Superjumbos

Thu Feb 10, 2000 9:51 pm

I think they'll stick to two aisles. The A-3XX will not be that much wider than a 747, so airlines will manage with two. 3-4-3 (10 abreast) will be used by airlines who now put 9 seats a row on a 747. Charter-operators might squeeze in 3-5-3 or even 3-6-3.

You'll never see 4 aisles, that will be extremely expensive to fly around, that will completely offset the advantages of scale.
Three aisles makes more sense and I guess they will compensate for the evacuation disadvantage by putting in more exits. A 3-4-4-3 might be an option on a real big airliner. But be sure, from the moment a crash happens with survivors, were most casualties were seated near the central aisle, that aisle will be nicknamed the death-trap-aisle.
nobody has ever died from hard work, but why take the risk?
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RE: No. Of Aisles In Superjumbos

Thu Feb 10, 2000 11:41 pm

I don't think either Boeing or AI's upcoming Jumbo's are going to be much wider, Airbus certainly projected a 3-4-3 main deck and 2-2-2 upper deck, so that's no real chage, and as for the 747-400X the same width as the current 744 will apply.....

RE: No. Of Aisles In Superjumbos

Fri Feb 11, 2000 4:49 am

Boeing is already researching into developing a 700-800 seater, which would resemble a really big 777-300 with four engines. The cabin is supposed to even wider than the 777 or the 747-400, by as much as 8-10 feet. The plane would not be a double-decker like the A3XX Beast.
Apparently, Boeing isn't too keen on developing a double-decker for safety and boarding/disembarking reasons. The concept superjumbo is also to have three aisles, seating 2-4-4-2 abreast. I wouldn't be surprised to see at least a few concerns about evacuating a three-aisle plane in an emergency.
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Superjumbos Can Be Three-floored

Fri Feb 11, 2000 7:39 am

I heard that one company (possibily Boeing; I don't know it's name) going to make 1000 seats Superplane!!! I was think that these plane can be three-floored! If three floores are no safety, it can be only two-floored, but two floor, don't like B747, can be on all aircraft (not only in first part of airliner). If we put seats into AN-225 "Myria" (I think that Antonov Design Bureau will build a passenger modification of this plane) Two floors will be on all aircraft.

Do you ever seen Aerospacelines Super Guppy (if don't you can see it. Search photos in advanced search)? If we put seats in it? There be Super-Ultra-Extra-Jumbo-Big passenger plane. But this plane will be unsafe.

I have good thinks about aircraft designing in future. This part is about my projected aircraft:

Plane have two noses. They don't connected. It like two planes when view from nose. In the middle are wings. Theres three engines on each. And one 'wing' which connect two sides of plane. In each side is two aisles (3-4-3---3-4-3). On the connection 'wing' is one engine. There are two pilots on a plane (one is in one part, second is in another part). The connection 'wing' width is small. The aircraft have two tails. But in tale is another (smaller) conection 'wing'.

This airplane will be safe, because space between two parts will be about 5 meters, and were people will can go. There can be airplane with many parts
(2-3-2---3-4-3---4-4-4---3-4-3---2-3-2. In middle section will be economy class, and in first class in outer section. This will make because if more passengers sit in section, the section weight will be more too. If outer parts weight be bigger then middle, connection wings will broke. Plane can be combi: 3-4-3---cargo---3-4-3).

This plane is like two planes (passengers and board can't get from one part to another), but running costs are lower.
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RE: No. Of Aisles In Superjumbos

Fri Feb 11, 2000 7:52 am

For certification purposes the A3XX will be regarded as a 4-aisle airplane - two upstairs and two downstairs. The lower, main deck, will have seats 1-in wider than current seats at 10-abreast on the B747, as the A3XX is 10-in wider than the Boeing. The upper deck has the same seats as the A330/340, so seat width is not as great upstairs.

RE: Superjumbos Can Be Three-floored

Fri Feb 11, 2000 8:01 am

TRIPLE-DECK!? HOLY COW!! That's kinda impossible!!
Frankly, I don't think that'd be safe, and not to mention the incredible aerodynamic drag this kind of design would have! That'd result in too much fuel being eaten up!

But ,yes, I kind of like the "double fuselage" concept you're talking about. That design has actually been first thought of by Boeing and McDonell Douglas at least 20 years ago!

The 800/1000-seater is already under active research by Boeing and possibly Airbus. What happens is that they came up with a design called the Blended Wing Body, with 4 engines on top and large winglets on each wingtip. The BWB looks like an enormous flying wing with no visible fuselage. The passegers are seated in the centre section. The length of the full-scale a/c would be probably not much greater than a 777-300(242'), but the 800-1000 seats would be arranged in something like this: 2-3-4-4-3-2. That's FIVE AISLES!!

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