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RupesNZ
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A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 12:26 pm

I can't find anything else on this in the forum, but from looking at this picture, it certainly looks like the A380 will be fitted with 4 wheels for the nose landing gear - which does seems to be a departure from the nose wheels used when rolling it out?

Any comments?

http://www.airbus.com/A380/Images/MME/1468.JPG

I'm stuffed if I can make this an inline image or a link though!
 
gigneil
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 12:50 pm

This picture doesn't look like much to me... all accounts of the nose gear thus far have been 2 wheels.

N
 
Airbus_A340
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 12:54 pm

Like Gigneil said, it should be just 2 wheels.
The picture looks like the 6 wheels bogie for the main landing gear.
 
AFROTC
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 1:22 pm

I think they labeled the picture wrong. I saw the same thing a couple days and I looked at other pictures and the video of the test and saw that it was the main gear.
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ATLhomeCMH
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 1:36 pm

Looks like 2 wheels to me, too. 4 wheels wouldn't surprise me, though, since the A380 seems strangely "excessive," if that makes any sense...
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AsstChiefMark
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 1:59 pm

I like the video of them cycling the main gear here:

http://www.airbus.com/A380/default1.asp

That's a huge chunk of metal and rubber. I can hardly wait to see the whole plane!
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qexonial
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 3:38 pm

Howdy,

From this picture, I see 4 wheels, unless I'm imagining it.


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DLKAPA
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 3:52 pm

No, it's only two. In the picture above, you can see the two nosegear, plus the outboard mains behind it, which makes it look like it has 4 wheels.
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ha763
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 3:55 pm

From this picture, I see 4 wheels, unless I'm imagining it.

Nope, only 2 for the nose. Remember, there are 4 main bogies. What you are seeing is part of the outer left main.
 
zvezda
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 5:42 pm

If what we're seeing is the outer left main gear, then why can't we see the outer right? Are we sure they were fitted as of the photo?
 
toksans
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 5:58 pm

Should be 2 wheels. Otherwise, it is almost impossible to steer with 4 wheels.
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TW741
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 6:05 pm

what you see on the pic behind the 2-wheel nose gear is the 4-wheel left wing gear. next to it (continuing to the left oft the pic): 6-wheel left body gear (behind the stairs), next (between the workers to the right of the guy with the yellow jacket) is the right 6-wheel body gear and last on the left (behind the left group of workers) would be the right 4-wheel wing gear.

The nose gear is definitely a 2-wheel gear - here you see a photo (without wheels) of the nose gear while retracted on the testbed: http://www.airbus.com/A380/Images/MME/929.JPG



[Edited 2004-09-14 11:06:05]
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geizistgeil
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 6:12 pm

I´ve the latest issue of AeroInternational, where is an article "Auf großem Fuß" (something like "big foot") about the undercarriage of the A380. You can see a testbed with the installed main-center-landing gear and a computer-animation of the node gear with only two conventional gears.
You can also find a picture of it here:
http://www.aviationnow.com/avnow/spSec/a380_4.jsp

BTW: the reg. for the above a/c ist F-WXXL, don´t know if mentioned before, but XXL is funny

MS


[Edited 2004-09-14 11:15:25]
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ZKSUJ
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 7:09 pm

That picture shows 2 wheels. The only 4 nose wheeled aircraft I have seen lately are the ones on 'Thunderbirds'.  Big grin
 
NZ1
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 7:53 pm

The Antonov 124 also has 4 nosewheels on 2 bogies.


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gearup
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 8:56 pm

Also the IL76 has a 4 wheel nose gear with 2 on each side of the leg and one common axle. Nice arrangement!

GU
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elcapi1980
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 10:51 pm

Howdy,

From this picture, I see 4 wheels, unless I'm imagining it.
-----------------------------------------------------------

yes , you are imagining it, don't worry that is call "380 anxiety".....

 Smile ...



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deltabobo
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 10:52 pm

C-5 Galaxy has 4 wheels for nose gear bogie
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Francoflier
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RE: A380 - 4 Wheels For Nose Landing Gear?

Tue Sep 14, 2004 11:18 pm

Hey,

Back to the original pic, posted by RupesNZ, it looks like it is the main landing gear with its 6 wheels bogie, only that its missing some of its wheels.

But what I think is strange is that you can only see brake assemblies on 4 of the wheels...

Might it be that the a/c doesn't need 20 sets of brakes to stop within requires distance, and that in order to save weight 2 of the disks/pads assy are "missing" from the main 6 wheels-bogie gear?

Or am I interpreting that pic wrong too?
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nzblue
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 6:50 am

I'm sorry....Is it just me, or do those people working in the hanger look so amazingly small compared to the metal behind it?

I still can't believe this thing is being built! Can't wait to see it fly.

Whether a success, failure or both the A380 is destined to become another significant milestone in commercial aviation history.

Regards,
NZblue
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Kooyong
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 8:21 am

If all else fails, look on the airbus website-- 2 x 6 wheel bogies main; 2 x 4 wheel bogies wings; 1 x 2 wheel bogie nose; 20 wheels for body 2 wheels for nose; 22 total
 
LineMechQX
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 9:17 am

Interesting, I don't see any provisions on the original pic, for a 3rd set of brakes. The axle without brakes does look to have a steering actuator, and a pivot point. Hmmmm. I guess whether the whole truck will steer, is yet to be seen. Awesome pic though, (from a mechanics perspective at least). Won't stay clean very long.

Late
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OV735
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 10:58 am

On the pic Qexonial posted (post no 6), there's definetly 4 wheels on the nose landing gear. Whether that's for testing purposes or will be like that permanently, I don't know.

EDIT: My mistake. It's got two wheels. The second, shady wheel that I mistakenly thought belonged to the nose gear, is actually the left main undercarriage wheel.

Sorry.  Innocent

[Edited 2004-09-15 04:01:06]
 
747400sp
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 6:10 pm

Take a good look at the picture, at the agle the photo was taken, it has the nose gear and part of the under wing gear mix together. The A380 has only two wheels on it's nose gear.
 
Klaus
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RE: A380 - 4 Wheels For Nose Landing Gear?

Wed Sep 15, 2004 10:34 pm

Francoflier: Might it be that the a/c doesn't need 20 sets of brakes to stop within requires distance, and that in order to save weight 2 of the disks/pads assy are "missing" from the main 6 wheels-bogie gear?

It looks as if the steerable trailing axle does not have brakes. If it had and one of them failed/blocked/slipped, the steering actuators would have to counteract the differential force in order to keep the aircraft on track. They probably traded some additional braking force for simplified design of the steering mechanism.

In addition, it would be difficult to design the necessary braking force links (visible on the picture alongside the bogie beam between the other four brake assemblies) to the steerable wheels...

And no, as far as I know, none of the main bogies is steerable as a whole.

[Edited 2004-09-15 15:42:57]
 
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Francoflier
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RE: A380 - 4 Wheels For Nose Landing Gear?

Thu Sep 16, 2004 2:16 am

Klaus:

Thanks! Makes sense. I did not think about the steerable wheels...

Will the wheels of the outer bogies be steerable too? (or the whole bogies?)
I'll do my own airline. With Blackjack. And hookers. In fact, forget the airline.
 
Klaus
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Francoflier

Thu Sep 16, 2004 2:39 am

No, the wing bogies are static. Only the trailing axles of the body gear (the ones farthest aft of the aircraft´s pivot point) are steerable.

There will be some tire scrubbing in tight corners, but if I´m not mistaken the two pairs of MLG legs are a bit closer together than on the 747 so it might still not be that bad.
 
cedarjet
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RE: A380 - 4 Wheels For Nose Landing Gear?

Thu Sep 16, 2004 5:32 am

Interesting. A forum member who works on the ramp Heathrow's T3 said Airbus widebodies are less popular than the equivalent Boeings (777 and 747) in tight spaces - there are two or three gates at T3 that can only accept 777s and 747s (no A330s or A340s) because the Airbus planes don't have the same turning circle to get in and out (ahem). As the biggest aircraft taxiing around terminals and taxiways, the A380 has to be more maneouverable and versatile on the ground than the 747, because it's a bigger aircraft but will have to fit into, in most cases at first, existing infrastructure.
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Starlionblue
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RE: A380 - 4 Wheels For Nose Landing Gear?

Thu Sep 16, 2004 5:49 am

Well, the 346 will still be the longest airliner even when the 388 comes out, so it might have the toughest time taking tight corners, although the 388 will require more taxiway width in corners.

Does anyone know how they compare in terms of wheelbase?
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
Klaus
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Cedarjet

Thu Sep 16, 2004 7:27 am

Cedarjet: A forum member who works on the ramp Heathrow's T3 said Airbus widebodies are less popular than the equivalent Boeings (777 and 747) in tight spaces - there are two or three gates at T3 that can only accept 777s and 747s (no A330s or A340s) because the Airbus planes don't have the same turning circle to get in and out (ahem).

That sounds very weird... I´ve got trouble believing an A330 would have a larger turning radius than a 747...

Is there any corroboration for this? I couldn´t find the actual numbers with a quick search.
 
Arcano
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RE: A380 - 4 Wheels For Nose Landing Gear?

Fri Sep 17, 2004 12:10 pm

About 4 wheeled nose aircraft, look the funny configuration of the huge Antonov 225:


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