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# 1 Air Mechanics of Boeing 787
01-20-2011, 11:33 AM
ahh.. i've been itching to do this note lol.
Air Mechanics of Boeing 787. yes, it's small explaining of Boeing 787's Wings.
the wings you see in Pictures or Videos on ground are straight level, but when it's takeoff time, the wings bend upward for easier takeoff and high chance of drag reduction you see, air flows very fast with bended wing as wing is bended upward, the air hits it, splitting into 2 creates better and fast, speedy lift and drag reduction at same time. upper air goes over the bended wing, allowing the Aircraft to get fast speed. while the down air goes under the bended wing to allow 10x times the lift, allowing it to get off ground with little room. that's why 787 has them. because the wings are thin, wings and body is made of composite materials.
Lt. Commander
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# 2
01-20-2011, 03:17 PM
Okay, that was...helpful? I suppose if I'm ever asked the question about how a Boeing 787 stays aloft, I can now answer.
Lt. Commander
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# 3
01-20-2011, 03:40 PM
I always liked the 747 better.
Lt. Commander
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# 4
01-20-2011, 04:02 PM
Congrats. You've explained how a wing works. Of course it might of been easier to copy and paste Bernoulli's principle and laws of fluid dynamics. You seem to be good with copy and paste so it might of been an easier route.

As far as the wing flexing, it has nothing to do with increased lift. In fact aerodynamically the wing is really nothing special. There are really no new or advanced options on it. What makes the wing unique is simply the use of advanced materials and construction. Allowing the wing to be longer, lighter, and with a reduced wing cross section (Ie: less upper camber) In simple terms a thin long wing produces more lift and less drag then a short fat wing. The side result is the wing, being less ridged flexes more under load. And also gives the wings a kind of pseudo set of winglets at maximum load.
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# 5
01-20-2011, 04:10 PM
Quote:
Originally Posted by captnwan View Post
As far as the wing flexing, it has nothing to do with increased lift.
I thought that was the case but it has been a long time since I studied aerodynamics.
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# 6
01-20-2011, 04:37 PM
How does it fly upside-down? :p
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# 7
01-20-2011, 04:49 PM
Quote:
Originally Posted by Cu-Annan
I thought that was the case but it has been a long time since I studied aerodynamics.
Admittedly my expertise on this is limited at best. So if i'm wrong id actually enjoy being proved wrong on it, assuming they can provide the math to back it up. It would be a fun conversation.

But that aside, we are really taking basic concepts here. Lift is generated 90 degrees to the plane of the wing. So a wing at high flex would actually produce less lift then a perfectly level one. Its the same reason why an aircraft looses lift in a banking turn. Vertical lift gets split unto vertical and horizontal lift, reducing the overall vertical lift.

And yea, i'm just that kind of a nerd. Sorry folks, Supers normal silliness aside. I get touchy about aeronautics.
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Posts: 120
# 8
01-20-2011, 04:51 PM
Quote:
Originally Posted by hort_wort View Post
How does it fly upside-down? :p

This might help: http://xckd.com/803/
Lt. Commander
Join Date: Dec 2007
Posts: 120
# 9
01-20-2011, 04:53 PM
Quote:
Originally Posted by Cuatela
This might help: http://xckd.com/803/
Hahahha, that's the comic I was thinking of!
Lt. Commander
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# 10
01-20-2011, 06:00 PM
http://www.digitaltrends.com/wp-cont...eamliner-2.jpg

What the heck is this thing supposed to be, a bird?

Anyway, with rising terrorist threat, I'd think todays passenger planes would be more like this:
http://warisboring.com/wp-content/up...0/ac-130-1.jpg

The following images perfectly explain the above image
http://media.ebaumsworld.com/picture...130Gunship.png
Yes, you are
http://www.motifake.com/image/demoti...1242607783.jpg
http://military-power.net/images/Motivation/ac130-2.jpg
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