747400sp
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Was The Boeing 747 The First Composite Airliners

Fri Dec 24, 2004 6:16 pm

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.
 
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Starlionblue
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RE: Was The Boeing 747 The First Composite Airline

Fri Dec 24, 2004 11:27 pm

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." - John Ringo
 
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sammyk
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RE: Was The Boeing 747 The First Composite Airline

Sat Dec 25, 2004 2:08 am

"metal is not really fixible"

Interesting, then how do they bend it into such wonderful shapes?  Big grin
 
DfwRevolution
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RE: Was The Boeing 747 The First Composite Airline

Sat Dec 25, 2004 3:01 am

Aluminum foil from the grocery store is flexible, and airplane skin is basically a very strong aluminum alloy  Big grin
 
gigneil
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RE: Was The Boeing 747 The First Composite Airline

Sat Dec 25, 2004 3:24 am

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

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

N
 
EMBQA
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RE: Was The Boeing 747 The First Composite Airliners

Sat Dec 25, 2004 6:06 am

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"
 
WesternA318
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RE: Was The Boeing 747 The First Composite Airliners

Sat Dec 25, 2004 10:14 am

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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2H4
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RE: Was The Boeing 747 The First Composite Airline

Sat Dec 25, 2004 10:23 am

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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