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Why Do These Wings Have Weights?  
User currently offlinejtl11968 From United States of America, joined May 2007, 42 posts, RR: 0
Posted (2 years 4 weeks 1 day 13 hours ago) and read 15407 times:

The reason is probably obvious to many but I'm an airplane geek without much manufacturing knowledge.

Why do the aircraft in the picture have the weights hanging from the wings?

http://www.airliners.net/photo/Air-I...eing-787-837-Dreamliner/2150597/M/

19 replies: All unread, jump to last
 
User currently offlinejetmatt777 From United States of America, joined Jun 2005, 2791 posts, RR: 32
Reply 1, posted (2 years 4 weeks 1 day 13 hours ago) and read 15387 times:

Just a guess, but those weights are where the engines would normally mount. I'm assuming the weights are there to prevent the wing from flexing near the wing root while there is no permanent weight hanging from the engine mounting areas.


No info
User currently offlineBreninTW From Taiwan, joined Jul 2006, 1647 posts, RR: 1
Reply 2, posted (2 years 4 weeks 1 day 13 hours ago) and read 15360 times:

I believe it's mostly to stop the aircraft tipping backwards -- the engines are typically mounted forward of the center of gravity of an aircraft, and they're heavy.

Without the engines, there's a very real risk of the aircraft tipping backwards, especially in windy conditions.



I'm tired of the A vs. B sniping. Neither make planes that shed wings randomly!
User currently offlineAR385 From Mexico, joined Nov 2003, 6217 posts, RR: 30
Reply 3, posted (2 years 4 weeks 1 day 12 hours ago) and read 15330 times:
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I may be wrong, but extrapolating from the 747 history, that was a common sight early in the delivery schedule because although the frames were ready, the engines were behind schedule. Without those weights, the 747 tilted backwards.

I assume that is the case with these 787s.


User currently offlineblueflyer From United States of America, joined Jan 2006, 4004 posts, RR: 2
Reply 4, posted (2 years 4 weeks 1 day 12 hours ago) and read 15213 times:
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Put replies #1 and #2 together and you have the answer.

The 787 delays are notorious. No need to spend money to buy engines that are not (yet) needed.



I've got $h*t to do
User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4200 posts, RR: 37
Reply 5, posted (2 years 4 weeks 1 day 12 hours ago) and read 15163 times:

Aren't those aircraft awaiting structural strengthening?


Chicks dig winglets.
User currently offlineFI642 From Monaco, joined Mar 2005, 1079 posts, RR: 2
Reply 6, posted (2 years 4 weeks 1 day 3 hours ago) and read 14418 times:

Engines provide a lot of forward CG for the aircraft. I have seem weights attached to an aircraft awaiting an engine change.


737MAX, Cool Planes for the Worlds Coolest Airline.
User currently offlineinfiniti329 From United States of America, joined Jul 2012, 667 posts, RR: 0
Reply 7, posted (2 years 4 weeks 1 day 3 hours ago) and read 14396 times:

The weights I would assume is the average weight of engine and nacelle?

User currently offlineDualQual From United States of America, joined Mar 2006, 769 posts, RR: 1
Reply 8, posted (2 years 4 weeks 1 day 2 hours ago) and read 14196 times:

Quoting XFSUgimpLB41X (Reply 5):

Aren't those aircraft awaiting structural strengthening?


Training with those weights should build the strength      

Sorry, couldn't resist!


User currently onlineStitch From United States of America, joined Jul 2005, 31003 posts, RR: 86
Reply 9, posted (2 years 4 weeks 1 day 2 hours ago) and read 14176 times:
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Quoting XFSUgimpLB41X (Reply 5):
Aren't those aircraft awaiting structural strengthening?

Assuming they're early builds, they would be in need of change incorporation and re-work.


User currently offline9lflyguy From United States of America, joined Jan 2010, 167 posts, RR: 0
Reply 10, posted (2 years 4 weeks 23 hours ago) and read 12793 times:

Not to be off topic too much but since we're discussing the photo, what are the two WN jets doing at KPAE i(upper right hand corner)? Are these new deliveries or conversions from AirTran? Just want more information on those two birds.


My opinions do not represent the opinions of my company. They are solely the opinion of the poster.
User currently offlineRonaldo747 From United States of America, joined Feb 2009, 381 posts, RR: 0
Reply 11, posted (2 years 4 weeks 23 hours ago) and read 12224 times:

Quoting 9lflyguy (Reply 10):

IIRC the 738 gets LifeTV or similar systems at PAE. All SWA 738 flies to PAE after delivery at first before entry intro service.


User currently offlineairplanenut From United States of America, joined Sep 2001, 655 posts, RR: 0
Reply 12, posted (2 years 4 weeks 22 hours ago) and read 11636 times:

Quoting 9lflyguy (Reply 10):

Not to be off topic too much but since we're discussing the photo, what are the two WN jets doing at KPAE i(upper right hand corner)? Are these new deliveries or conversions from AirTran? Just want more information on those two birds.

A good amount of maintenance is done at PAE. AS and SW both have 737s going in and out daily, and there are also some DL birds (mostly MD80s).

Quoting infiniti329 (Reply 7):
The weights I would assume is the average weight of engine and nacelle?

If memory serves correctly, those are marked around 15,000lbs each.



Why yes, in fact, I am a rocket scientist...
User currently offline747-600X From United States of America, joined Jan 2000, 2792 posts, RR: 14
Reply 13, posted (2 years 4 weeks 16 hours ago) and read 6848 times:

The risk of them tipping backwards seems to be relatively low, given that the nose gear strut appears tethered to the ground. (Although this raises the question of why there would be tie-downs in the middle of a runway...)


"Mental health is reality at all cost." -- M. Scott Peck, 'The Road Less Traveled'
User currently offlinenomadd22 From United States of America, joined Feb 2008, 1866 posts, RR: 0
Reply 14, posted (2 years 4 weeks 16 hours ago) and read 6497 times:

Quoting 747-600X (Reply 13):
The risk of them tipping backwards seems to be relatively low, given that the nose gear strut appears tethered to the ground. (Although this raises the question of why there would be tie-downs in the middle of a runway...)

That doesn't really follow. You don't want to hold a plane down by the nose gear.



Andy Goetsch
User currently offlineadam42185 From United States of America, joined Dec 2005, 416 posts, RR: 0
Reply 15, posted (2 years 4 weeks 15 hours ago) and read 5855 times:

Quoting DualQual (Reply 8):

Training with those weights should build the strength

Sorry, couldn't resist!

I lift things up and put them down!


User currently offlinevaus77w From Australia, joined Aug 2011, 143 posts, RR: 0
Reply 16, posted (2 years 4 weeks 13 hours ago) and read 5114 times:

Quoting AR385 (Reply 3):
I may be wrong, but extrapolating from the 747 history, that was a common sight early in the delivery schedule because although the frames were ready, the engines were behind schedule. Without those weights, the 747 tilted backwards.

This video demonstrates this:
http://www.youtube.com/watch?v=cHhZwvdRR5c


User currently offlineQANTAS747-438 From United States of America, joined Jan 2001, 1963 posts, RR: 2
Reply 17, posted (2 years 4 weeks 13 hours ago) and read 4874 times:

Quoting 9lflyguy (Reply 10):
Not to be off topic too much but since we're discussing the photo, what are the two WN jets doing at KPAE i(upper right hand corner)? Are these new deliveries or conversions from AirTran? Just want more information on those two birds.

I think they are new deliveries... N8319F and N8320J, -800s.



My posts/replies are strictly my opinion and not that of any company, organization, or Southwest Airlines.
User currently offlinewjcandee From United States of America, joined Jun 2000, 5163 posts, RR: 22
Reply 18, posted (2 years 4 weeks 12 hours ago) and read 4812 times:

Quoting adam42185 (Reply 15):
I lift things up and put them down!

One of the greatest gym commercials ever. Almost joined just to reward them for that!

http://www.youtube.com/watch?v=eOSeOieLh7s


User currently offlinejustplanesmart From United States of America, joined Mar 2001, 722 posts, RR: 2
Reply 19, posted (2 years 3 weeks 6 days 16 hours ago) and read 4282 times:

Quoting QANTAS747-438 (Reply 17):
I think they are new deliveries... N8319F and N8320J, -800s.

Those two have not been delivered yet, having just made their first flights this week (August 23). Also, the aircraft toward the rear clearly has only one over-wing exit. It might be N7734H, formerly N300AT, which just flew overnight (August 25) from Paine to Sea-Tac for reentry into service.



"So many planes; so little time..."
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