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Is The A340 Leaning Forward?  
User currently offlineSK A340 From Sweden, joined Mar 2000, 845 posts, RR: 2
Posted (13 years 1 month 2 days 8 hours ago) and read 1729 times:


When you see a picture of an A340 on the ground, it looks like it's leaning forward. Is it really doing that, and if so how is it in the cabin? Do you feel it?



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21 replies: All unread, jump to last
 
User currently offlineLuxair From Netherlands, joined Jan 2001, 852 posts, RR: 2
Reply 1, posted (13 years 1 month 2 days 8 hours ago) and read 1629 times:

I agree with you because everytime when I see a picture of the A340-300 I
have the same impression as you have . I flew with Sabena's A340-300 last year
from Brussel to New York and you can not feel or see it inside the cabin but however
I wonder why it looks like leaning forward too?

Best regards



Marvin Lee Cooper
User currently offlineNoUFO From Germany, joined Apr 2001, 7957 posts, RR: 12
Reply 2, posted (13 years 1 month 2 days 8 hours ago) and read 1613 times:

Maybe it is so, because a short front gear is more robust?
Or maybe pilots have a better view over the airfield?
Maybe both?

NoUFO



I support the right to arm bears
User currently offlineKlaus From Germany, joined Jul 2001, 21468 posts, RR: 53
Reply 3, posted (13 years 1 month 2 days 7 hours ago) and read 1587 times:

I remember a TV program several years ago about development and flight testing of the 340; They mentioned some problems with a cargo loader due to the slightly angled cargo door.

I´m just still wondering what they did that for??


User currently offlineZauberfloete From Austria, joined Nov 2000, 302 posts, RR: 0
Reply 4, posted (13 years 1 month 2 days 5 hours ago) and read 1562 times:

I heard it was due to the construction of the front gear.
This front gear strut was an easy an practical design, for various reasons. But it is a little bit too short.
(so that lean forward design is an unwanted effect, but it´s not a big problem)
I think the new versions (500, 600) have a complete new develloped gear, and they don´t show that effect.


User currently offlineZauberfloete From Austria, joined Nov 2000, 302 posts, RR: 0
Reply 5, posted (13 years 1 month 2 days 5 hours ago) and read 1548 times:

I have to correct myself - I looked a t pictures of the 340-600, and it is still a little bit leaning forward.

User currently offlineBAsteward From , joined Dec 1969, posts, RR:
Reply 6, posted (13 years 1 month 2 days 5 hours ago) and read 1540 times:

I used to fly for Virgin, the pilots there said it was because they used an A300/A310 nose gear to cut development costs.

User currently offline747-600X From United States of America, joined Jan 2000, 2792 posts, RR: 14
Reply 7, posted (13 years 1 month 2 days 5 hours ago) and read 1534 times:

First, this is not just A340s which do this. Take a look at a profile schematic of a 767-400 - you'll notice that the ground is shown slanted. For that matter, look at almost any modern jet's schematic, the side view will show one of two things - either the ground is slanted so that the schematic can show a level fuselage, or the front nose gear is shown raised off the ground for the same reason, either way, on most modern jets the aircraft dose lean forward. This way the front gear can be shorter so it takes up less space when it is stowed, though I'm not sure what's so valuable about the space under the nose, and this allows the plane to rotate further on the runway... an additional degree of forward rotation is an additional degree of rotation. Anyway, it's not just on the A340. Lots of aircraft have this design.


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
User currently offline9V-SPJ From United States of America, joined Dec 2000, 752 posts, RR: 0
Reply 8, posted (13 years 1 month 2 days 1 hour ago) and read 1491 times:

I have heard that under a full fuel load, the A340 tends to bend on its nose gear a bit.

9V-SPJ


User currently offline757man From United Kingdom, joined Feb 2001, 370 posts, RR: 1
Reply 9, posted (13 years 1 month 2 days ago) and read 1466 times:

If we're talking about shorter nose gear legs, then why don't you also mention the 737, especially the early -200 series.

User currently offlineKlaus From Germany, joined Jul 2001, 21468 posts, RR: 53
Reply 10, posted (13 years 1 month 1 day 17 hours ago) and read 1433 times:

Hmmm... Maybe it´s indeed a good idea:

The nose gear doesn´t need to be as tall as the MLG, since it doesn´t contribute to tail clearance on rotation or to engine ground clearance on crosswind landings.

Maybe it´s not so much the space for the wheel well but instead the weight of the entire nose gear assembly that´s making a difference...


User currently offlineSharpnfuzzy From Canada, joined Jun 2001, 570 posts, RR: 0
Reply 11, posted (13 years 1 month 1 day 14 hours ago) and read 1405 times:

Hey you're right.... I just noticed that the 767-400 looks like it is leaning forward

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Photo © Marlo Plate



I never noticed it before.. probably cause i never gave it a second though, due to the fact that the 300/200s aren't leaning.

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I guess it's just more noticable on the 340.

snf


User currently offlineBA From United States of America, joined May 2000, 11153 posts, RR: 58
Reply 12, posted (13 years 1 month 1 day 13 hours ago) and read 1388 times:

Oh boy......the CRJ-700 is the best example of shorter nose gear. If I can find a photo, I'll post it.

The CRJ-700 REALLY leans forward.

Regards.



"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran
User currently offline747-600X From United States of America, joined Jan 2000, 2792 posts, RR: 14
Reply 13, posted (13 years 1 month 1 day 13 hours ago) and read 1382 times:

One more thing, with the nose leaning forward the pilot has increased visibility of the ground in front of his plane, and the idea that it's for weight saving is probably right, with planes it's all weight weight weight!


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3701 posts, RR: 34
Reply 14, posted (13 years 1 month 1 day 13 hours ago) and read 1384 times:
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When they were designing the A340 someone forgot to tell the fuel system designers that the a/c was going to sit on the ground with a nose down attitude. The fuel system people thought it would be horizontal so put the fuel tank water drain points at the lowest points in each tank.

Now with the a/c sitting nose down the fuel tank low points are further forward than the water drain valves. This meant that when the weekly fuel tank water drain was carried out not all the water was removed from the tanks resulting in problems with the fuel qty indication system. When the problem was fully appreciated, until mods were carried out, the procedure was that the a/c had to be jacked horizontal before a proper water drain could be carried out.


User currently offlineAerLingus From China, joined Mar 2000, 2371 posts, RR: 0
Reply 15, posted (13 years 1 month 1 day 11 hours ago) and read 1364 times:

The MD-80 leans forward quite a bit, but you don't really notice it from inside the cabin. I imagine the inability to notice it would be the same for Airbus jets as well.


Get your patchouli stink outta my store!
User currently offlineDeanBNE From , joined Dec 1969, posts, RR:
Reply 16, posted (13 years 1 month 3 hours ago) and read 1321 times:

I, too, have often wondered why aircraft, seemingly the A340 in particular, lean forward and I have a *theory* as to why...
Apart from improved surface visability, I also think that it improves the aircraft's runway performance. Most large, modern jetliners aircraft have their wings set at an an angle of incidence of about 3 (!?!) degrees. By having a slight nose down attitude this then negates the angle of incidence, which I believe during take-off, reduces the drag of the wing there-by allowing for a short take-off roll.
Any thoughts?

Cheers
DeanBNE


User currently offlineVS11 From United States of America, joined Jul 2001, 1111 posts, RR: 0
Reply 17, posted (13 years 1 month 2 hours ago) and read 1313 times:

Sorry to digress from the topic.

BASteward -
why on earth did you leave Virgin to work for BA?

Regards


User currently offlineEg777er From United Kingdom, joined Feb 2000, 1837 posts, RR: 14
Reply 18, posted (13 years 1 month ago) and read 1292 times:

I think it's something to do with the fact that the gear compressed more under loading than Airbus originally anticipated.

This caused some problems with LH I think as they couldn't get airstairs that were tall enough to reach door 4 on thier 340s.

The 777 also leans forward.


User currently offlineToady From United Kingdom, joined Feb 2001, 724 posts, RR: 0
Reply 19, posted (13 years 1 month ago) and read 1284 times:

These 2 also have a slight lean forward:


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User currently offlineRed Panda From Hong Kong, joined Jun 2000, 1521 posts, RR: 0
Reply 20, posted (13 years 4 weeks 1 day 21 hours ago) and read 1264 times:

First maybe the well is not big enough for long nose gear.


and I think DeanBNE has a pretty good pt. there-increase rwy performance.

brgds // r panda


User currently offlineBruce From United States of America, joined May 1999, 5057 posts, RR: 15
Reply 21, posted (13 years 4 weeks 1 day 21 hours ago) and read 1254 times:

The 727 also looks lower in the front.


Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
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