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Was The Boeing 747 The First Composite Airliners  
User currently offline747400sp From United States of America, joined Aug 2003, 3757 posts, RR: 2
Posted (9 years 12 months 4 days ago) and read 5287 times:

I when a 747 take off or is in flight there wings bend to support there weight, even 747 100 wing do this. Seeing that the dash 100 was built in the late 60's early 70's and metal is not really fixible, it make me think the 747 100 was the first airliner to use composite which they on the wing. I may be wrong do any body else agree.

7 replies: All unread, jump to last
 
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17174 posts, RR: 66
Reply 1, posted (9 years 12 months 3 days 19 hours ago) and read 5189 times:

No I don't agree. Metal can be very flexible. Just take a fish filleting knife. Bends nicely without breaking no? While composites have been in use for a long time, the wing structure on the 741 is made of metal alloys.


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineSammyk From United States of America, joined Oct 1999, 1690 posts, RR: 0
Reply 2, posted (9 years 12 months 3 days 17 hours ago) and read 5128 times:
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"metal is not really fixible"

Interesting, then how do they bend it into such wonderful shapes?  Big grin


User currently offlineDfwRevolution From United States of America, joined Jan 2010, 1001 posts, RR: 51
Reply 3, posted (9 years 12 months 3 days 16 hours ago) and read 5085 times:

Aluminum foil from the grocery store is flexible, and airplane skin is basically a very strong aluminum alloy  Big grin

User currently offlineGigneil From United States of America, joined Nov 2002, 16347 posts, RR: 85
Reply 4, posted (9 years 12 months 3 days 15 hours ago) and read 5071 times:

The 741 featured very little, if any, composite material.

Composite material is less flexible than metal. Not more so.

N


User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 5, posted (9 years 12 months 3 days 13 hours ago) and read 4989 times:

The wing tip of a 747 can flex up to 27 feet... That is flexible...!!!


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineWesternA318 From United States of America, joined Oct 2004, 5724 posts, RR: 24
Reply 6, posted (9 years 12 months 3 days 8 hours ago) and read 4907 times:

Ain't it the truth, Air2gxs?

Now, wasn't the 747 even overweight becasue of how much...umm...'stuff'...is on it? I know the original powereplants on the PA 747's were grossly underpowered. Much like the A340-300...



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User currently offline2H4 From United States of America, joined Oct 2004, 8956 posts, RR: 60
Reply 7, posted (9 years 12 months 3 days 8 hours ago) and read 4909 times:
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Composite material is less flexible than metal. Not more so.


Generalizations should never, ever, ever be made about composites. Given the countless possible variations in fiber orientation and layup, not to mention the prepreg variables and differing construction methods, the above statement is absolutely, 100% impossible to prove or disprove.

Composites can be stiffer than metal. They can be more flexible than metal. They can be stiffer in one direction than metal. They can be more flexible torsionally than metal. You get my drift.

Saying composite material acts in a certain way relative to another material is kind of like saying oil paints are greener than watercolors. You can make oil paint as green as you'd like by altering the pigment, etc.


2H4


P.S. - This is in no way intended to knock our esteemed Gigneil. I just see this sort of statement frequently and want to clear things up a bit.  Smile



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