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777-300 Folding Wings  
User currently offlineGnieob797 From United States of America, joined Dec 2005, 14 posts, RR: 0
Posted (7 years 9 months 4 days 12 hours ago) and read 19479 times:

According to A.net's aircraft data specs, the 773 has wings that fold. Is this true? And if so, does anyone have pictures?

40 replies: All unread, showing first 25:
 
User currently offlineGigneil From United States of America, joined Nov 2002, 16347 posts, RR: 85
Reply 1, posted (7 years 9 months 4 days 12 hours ago) and read 19478 times:

Absolutely not.

There was a folding wing option offered during the initial studies of the 777-200 but it was not desirable nor was the engineering for it ever done.

NS


User currently offlineJycarlisle From , joined Dec 1969, posts, RR:
Reply 2, posted (7 years 9 months 4 days 12 hours ago) and read 19458 times:

Quoting Gnieob797 (Thread starter):
According to A.net's aircraft data specs, the 773 has wings that fold. Is this true?

Perhaps it's the curvature of the wing? I really can't see the T7s having a winglet at the end IMHO and the aerodynamics of the wing is one of the things that amazes me about the craft.


Cheers,
Jeremy Carlisle


User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 3, posted (7 years 9 months 4 days 12 hours ago) and read 19442 times:

Quoting Gigneil (Reply 1):
but it was not desirable

Oh it was desirable, but it was too complex and heavy.


User currently offlineGigneil From United States of America, joined Nov 2002, 16347 posts, RR: 85
Reply 4, posted (7 years 9 months 4 days 12 hours ago) and read 19432 times:

Heh, hence why it wasn't desirable.

NS


User currently offlineGnieob797 From United States of America, joined Dec 2005, 14 posts, RR: 0
Reply 5, posted (7 years 9 months 4 days 12 hours ago) and read 19387 times:

Thanks. The data made it look like the wing, after folding, was 50% it's original size.

User currently offlineRemcor From United States of America, joined Feb 2006, 358 posts, RR: 0
Reply 6, posted (7 years 9 months 4 days 12 hours ago) and read 19258 times:

I remember reading an article way back in the day when they were first hashing out the 777 conceptual design. The article did mention that Boeing was considering a folding-wing design so that it could fit in tight gates. However this was just in the design concept phase and obviously the 777 that was built never had such a wing.

User currently offlineCba From United States of America, joined Jul 2000, 4531 posts, RR: 3
Reply 7, posted (7 years 9 months 4 days 11 hours ago) and read 19152 times:

If I remember correctly, during the design phase, AA requested that the 777 be able to squeeze into smaller gates at DFW, and Boeing proposed folding wings to accommodate this. It never wound up happening due to lack of interest.

User currently offlinePygmalion From United States of America, joined Jun 2006, 966 posts, RR: 38
Reply 8, posted (7 years 9 months 4 days 11 hours ago) and read 19129 times:

The folding wing option was designed and included in the static and fatigue test aircraft. (one wing on each) It passed all the testing and could have been certified. No one ever ordered it, including AA who asked Boeing for it. It's still on the drawings for the -200.

User currently offlineRuscoe From Australia, joined Aug 1999, 1562 posts, RR: 2
Reply 9, posted (7 years 9 months 4 days 10 hours ago) and read 18907 times:

You might yet see if if the Airforce goes with a 777 tanker.

Ruscoe


User currently offline777WT From United States of America, joined Jan 2005, 875 posts, RR: 1
Reply 10, posted (7 years 9 months 4 days 9 hours ago) and read 18667 times:

Quoting Cba (Reply 7):
If I remember correctly, during the design phase, AA requested that the 777 be able to squeeze into smaller gates at DFW, and Boeing proposed folding wings to accommodate this. It never wound up happening due to lack of interest.

LGA was in the plan as well...can't even believe they would think of using a 777 there...


User currently offlineStirling From Italy, joined Jun 2004, 3943 posts, RR: 21
Reply 11, posted (7 years 9 months 4 days 9 hours ago) and read 18560 times:

Quoting 777WT (Reply 10):
LGA was in the plan as well...can't even believe they would think of using a 777 there...

It's not too hard to believe.
The DC-10 and L-1011 were the result of airlines wanting to send 250 people from Chicago to LaGuardia.



Delete this User
User currently offlineCba From United States of America, joined Jul 2000, 4531 posts, RR: 3
Reply 12, posted (7 years 9 months 4 days 8 hours ago) and read 18217 times:

Quoting 777WT (Reply 10):
LGA was in the plan as well...can't even believe they would think of using a 777 there...

Cripes, could it even make it on/off of those runways? If so, it actually wouldn't be a bad idea, that place is so crowded it's ridiculous. They need to roll back frequencies with larger aircraft. Are there restrictions against wide bodies into LGA, or is that just DCA?


User currently offlineDfwRevolution From United States of America, joined Jan 2010, 972 posts, RR: 51
Reply 13, posted (7 years 9 months 4 days 8 hours ago) and read 18182 times:

Quoting Cba (Reply 7):
If I remember correctly, during the design phase, AA requested that the 777 be able to squeeze into smaller gates at DFW, and Boeing proposed folding wings to accommodate this. It never wound up happening due to lack of interest.

It wasn't so much DFW as it was ORD. We've never really had a problem with real estate here  Wink

What ultimately killed the wingtips were the fact that aircraft without the mechanism would still carry some unnecessary structural weight. That lead JAL to abjectly refuse the 777 if it carried the OEW penalty, and it wasn't a feature anyone really felt like pushing.


User currently offlineHighFlyer9790 From United States of America, joined Jul 2005, 1241 posts, RR: 0
Reply 14, posted (7 years 9 months 4 days 7 hours ago) and read 17658 times:

Quoting Gnieob797 (Reply 5):
The data made it look like the wing, after folding, was 50% it's original size.

Even if they went through with the wing fold option it would only fold the windgtips cutting off about 10-20 feet each wing..



121
User currently offlineLitz From United States of America, joined Dec 2003, 1764 posts, RR: 0
Reply 15, posted (7 years 9 months 4 days 7 hours ago) and read 17592 times:
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BTW -

The mechanisms for the folding wings ARE in use presently, although not on a 777 ... Boeing re-used the latches and engineering for the big transporter they built out of the 747 for the 787 hull sections.

They're used to latch the swing-tail onto the fuselage.

- litz


User currently offline707437 From United States of America, joined Nov 2003, 152 posts, RR: 1
Reply 16, posted (7 years 9 months 4 days 7 hours ago) and read 17439 times:

Well of course it was a requirement for the Navy F/A-777 program along with a catapult strut on the nosewheel and a tailhook. . . HAHAHA

But seriously as far as I remember there isn't any fuel tankage outboard of the wing fold line. . . Or is there?


User currently offlineMir From United States of America, joined Jan 2004, 21571 posts, RR: 55
Reply 17, posted (7 years 9 months 4 days 7 hours ago) and read 17365 times:

Quoting Cba (Reply 12):
Are there restrictions against wide bodies into LGA, or is that just DCA?

LGA has a wingspan restriction. Not-so-coincidentially, the 767-400's wingspan just squeaks in under that restriction.  Wink

-Mir



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User currently offlineYYZatcboy From Canada, joined Apr 2005, 1081 posts, RR: 0
Reply 18, posted (7 years 9 months 4 days 6 hours ago) and read 16688 times:
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Just imagine the first time the folded wing fails in flight. That would be scary...


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User currently offlineNcelhr From Vatican City, joined Jul 2006, 358 posts, RR: 0
Reply 19, posted (7 years 9 months 4 days 5 hours ago) and read 16190 times:

Quoting YYZatcboy (Reply 18):
Just imagine the first time the folded wing fails in flight. That would be scary...

I can't imagine a second time since the aircraft would have most probably crashed.
 Smile

That said, foldable wing technology has gone a very long way. Navy planes have folding wings for storage on aircraft carriers. Were talking about jet fighters which subject their pilots to several Gs.


User currently offlineBongodog1964 From United Kingdom, joined Oct 2006, 3573 posts, RR: 3
Reply 20, posted (7 years 9 months 4 days 4 hours ago) and read 15633 times:

Could you imagine the look on the faces of some passengers, as they see the wing tips fold up approaching the gate, or even worse folding down taxiing out.

I will never forget my wifes concern when travelling on a DHC dash 8, when the undercarriage doors in the engine nacelles opened.


User currently offlineBoeing Nut From , joined Dec 1969, posts, RR:
Reply 21, posted (7 years 9 months 4 days ago) and read 13326 times:

Quoting Gigneil (Reply 4):
Heh, hence why it wasn't desirable.

Ah, I see your angle now.

Quoting Ruscoe (Reply 9):
You might yet see if if the Airforce goes with a 777 tanker.

 checkmark 

Quoting 707437 (Reply 16):
But seriously as far as I remember there isn't any fuel tankage outboard of the wing fold line. . . Or is there?

No. Fuel storage would have stopped at the folding point.

Quoting YYZatcboy (Reply 18):
Just imagine the first time the folded wing fails in flight. That would be scary...

I don't believe that has ever happened on a military aircraft.


User currently offlineStarlionblue From Greenland, joined Feb 2004, 17035 posts, RR: 67
Reply 22, posted (7 years 9 months 3 days 21 hours ago) and read 11273 times:

Quoting Bongodog1964 (Reply 20):
I will never forget my wifes concern when travelling on a DHC dash 8, when the undercarriage doors in the engine nacelles opened.

That's when you say something like: "S**t! It's not supposed to do that!" Big grin



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offline777236ER From , joined Dec 1969, posts, RR:
Reply 23, posted (7 years 9 months 3 days 21 hours ago) and read 11240 times:

Quoting Gigneil (Reply 1):

There was a folding wing option offered during the initial studies of the 777-200 but it was not desirable nor was the engineering for it ever done.

Wrong. The engineering was completed and Boeing went so far as to complete the wing ultimate load test with a folding wing.


User currently offlineContinental From United States of America, joined Jun 2000, 5517 posts, RR: 18
Reply 24, posted (7 years 9 months 3 days 21 hours ago) and read 11081 times:

Quoting Boeing Nut (Reply 21):
Ah, I see your angle now.

There's a difference between the desire to HAVE and the desire to PRODUCE.  Smile


25 Cubastar : Slightly off topic, but the Navy Chance Vought F8 Crusader has actually flown several times (inadvertently) with it's wingtips in the folded position.
26 777WT : I work at LGA in aircraft maintenance and I can tell you DL does come to LGA with a 767, AA does once in a while too. A long time ago DL came to LGA
27 Dtwclipper : I have never heard of a 747 at LGA. Could you please elaborate on this? Why would DL even thing of diverting to LGA if LGA could even handle a 747? T
28 Poitin : So, for how many years has the US navy been buying airplanes with folding wings? Somehow, I think they got the bugs worked out of it about 65 years a
29 AirplaneFan : Rgds, AirplaneFan
30 Post contains images Boeing nut : This was the only "photo" I could find so far...
31 Post contains links Boeing Nut : This is correct with one small correction. One wing of the test aircraft had the solid wing and the other was the folding wing. http://www.kls2.com/c
32 Post contains images Trekster : Flight sim had alont of civil planes that can do that
33 Prebennorholm : Originally Boeing offered the 777 with three different wing options: - a folding wing with which it would fit into any DC-10 / MD-11 / L-1015 gate - a
34 YYZatcboy : and ships were sailing for thousands of years, but as soon as we got cocky, Titanic.... Never say never. there is ALWAYS a chance something will go w
35 Stirling : Especially with so many OTHER airports in the region that COULD handle it. If an airline did schedule a 777 into LGA, it would most likely be to/from
36 Thorny : Add to this list the drop-nose of the Concorde. Did this ever deploy by accident in mid-flight?
37 Prebennorholm : To produce folding wings is piece of cake compared to "folding landing" gears, which of course is a must on any airliner. And the loads on folding wi
38 HAWK21M : The Added weight offset the plan. regds MEL
39 Gigneil : I would LOVE to see some evidence of that. NS
40 Pygmalion : Watch "21st Century Jet", they have copies on Utube. They show the wing breaking at 154% of Ultimate and I think they mention the folding wing. It wa
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