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Airplane Design & Aesthetics (Read 4994 times)
Reply #15 - Sep 5th, 2009 at 10:34am

Jayhawk Jake   Offline
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By the way, Fly By Wire doesn't give the plane the ability to do ridiculous things, it just helps it.  The real advantage of fly by wire is that it allows for precise computer control, precision humans will never achieve.  And it doesn't allow crazy things to fly, it just makes crazy things controllable.

Almost all planes in the future will probably be FBW, mainly because it is more reliable (less moving parts), lighter (um, less parts), and more comfortable (if the plane can detect turbulance and make quick precise control adjustments, you will be much more comfortable)
 

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Reply #16 - Sep 7th, 2009 at 12:40pm

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Jayhawk Jake wrote on Sep 5th, 2009 at 10:30am:
The shape of the fueslage on a boeing is a well thought out design.
A retired Boeing engineer once told me, during the era prior to widebodies, Boeing stocked only one size of fuselage tube - just sliced it different lengths for the various models.  Smiley.  Enjoyed reading your piece.
 

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Reply #17 - Sep 7th, 2009 at 3:32pm

ShaneG   Offline
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Great response in your first reply, and a very unique perspective on the topic. Thanks. Smiley

Jayhawk Jake wrote on Sep 5th, 2009 at 10:34am:
By the way, Fly By Wire doesn't give the plane the ability to do ridiculous things, it just helps it.  The real advantage of fly by wire is that it allows for precise computer control, precision humans will never achieve.  And it doesn't allow crazy things to fly, it just makes crazy things controllable.



My supporting evidence for the fly by wire statement was the F-117 mostly, it was designed to look a certain way to maximize the stealth features of it's angular shape, and then fbw was used to make it fly. Function followed form in that particular case. Without fbw that plane wouldn't fly.
The F-16 is another good example of utilizing fbw to get an otherwise aerodynamically unstable design to fly, thus allowing certain design elements to be incorporated, ignoring traditional design rules to a degree.

Based on that, would it not make some sense that a certain amount of 'pretty' or 'cool' is put into aircraft design for marketing, or even subconscious aesthetics? Otherwise, wouldn't most planes just look the same for having to follow strict aerodynamic design laws?
  I think this is why differing nations aircraft all have a distinct appearance from each other, yet are instantly recognizable to which country made them. That human 'aesthetic' element of design. Smiley


 
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Reply #18 - Sep 8th, 2009 at 9:29am

Jayhawk Jake   Offline
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ShaneG wrote on Sep 7th, 2009 at 3:32pm:
Great response in your first reply, and a very unique perspective on the topic. Thanks. Smiley

Jayhawk Jake wrote on Sep 5th, 2009 at 10:34am:
By the way, Fly By Wire doesn't give the plane the ability to do ridiculous things, it just helps it.  The real advantage of fly by wire is that it allows for precise computer control, precision humans will never achieve.  And it doesn't allow crazy things to fly, it just makes crazy things controllable.



My supporting evidence for the fly by wire statement was the F-117 mostly, it was designed to look a certain way to maximize the stealth features of it's angular shape, and then fbw was used to make it fly. Function followed form in that particular case. Without fbw that plane wouldn't fly.
The F-16 is another good example of utilizing fbw to get an otherwise aerodynamically unstable design to fly, thus allowing certain design elements to be incorporated, ignoring traditional design rules to a degree.

Based on that, would it not make some sense that a certain amount of 'pretty' or 'cool' is put into aircraft design for marketing, or even subconscious aesthetics? Otherwise, wouldn't most planes just look the same for having to follow strict aerodynamic design laws?
  I think this is why differing nations aircraft all have a distinct appearance from each other, yet are instantly recognizable to which country made them. That human 'aesthetic' element of design. Smiley




They may be adjusted to look aesthetically pleasing, but overall the design is based on aerodynamics.  And in that sense all planes of the same type have the same basic features, whether it be the shape of the wings, the fuselage, the placement of engines, etc. 

On the FBW, I think you are confusing 'fly' with 'control'.  It would fly, easily, without fly by wire, but it would be hard to control without a computer helping. 
 

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Reply #19 - Sep 8th, 2009 at 1:02pm

C   Offline
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olderndirt wrote on Sep 7th, 2009 at 12:40pm:
A retired Boeing engineer once told me, during the era prior to widebodies, Boeing stocked only one size of fuselage tube - just sliced it different lengths for the various models.  Smiley.  Enjoyed reading your piece.



Yep, hence the 707, 727 and 737 all pretty much share the same nose. Smiley
 
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Reply #20 - Oct 9th, 2009 at 7:07pm

Plugpennyshadow   Offline
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So my lazy-boy perched ontop of a GE-100 won't fly even if I equip it with FBW?  Damn!  Now what do I do with this engine?...(While looking at the old Snapper rider mower with an evil gleam in the eye!)
 
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Reply #21 - Oct 12th, 2009 at 2:17am

Leigh   Offline
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i spoke to an Airforce pilot and asked him whats better? a boeing or a Airbus he said

The boeing is better not by look by how it performs. Because of the FBW on the AB it doesnt have good low speed control and stuff like that. its true and i just cant remember what he said but it was the basis of the FBW on the airbuses are ruining it or something to that degree! Cheesy

 

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Reply #22 - Oct 12th, 2009 at 3:20am

Hagar   Offline
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Leigh wrote on Oct 12th, 2009 at 2:17am:
i spoke to an Airforce pilot and asked him whats better? a boeing or a Airbus he said

The boeing is better not by look by how it performs. Because of the FBW on the AB it doesnt have good low speed control and stuff like that. its true and i just cant remember what he said but it was the basis of the FBW on the airbuses are ruining it or something to that degree! Cheesy

I always understood that low speed handling is improved by the FBW. This has been demonstrated at air shows like Farnborough many times. http://www.youtube.com/watch?v=i4h7IYiZuMU&feature=related
 

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Reply #23 - Oct 12th, 2009 at 3:41am

Leigh   Offline
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i think it was more like you dont get the feeling that your stalling with FBW then on and airbus.
 

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Reply #24 - Oct 12th, 2009 at 3:45am

Hagar   Offline
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Leigh wrote on Oct 12th, 2009 at 3:41am:
i think it was more like you dont get the feeling that your stalling with FBW then on and airbus.

Sorry. Can you repeat that - slowly. Roll Eyes Tongue
 

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Reply #25 - Oct 12th, 2009 at 4:04am

Leigh   Offline
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Like theres no mechanics with the airbus right so instead of feeling the stall you cant and so on i know what it is i just cant explain it well enough
 

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Reply #26 - Oct 12th, 2009 at 4:22am

Hagar   Offline
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Leigh wrote on Oct 12th, 2009 at 4:04am:
Like theres no mechanics with the airbus right so instead of feeling the stall you cant and so on i know what it is i just cant explain it well enough

I know what you're getting at. Providing everything is working properly it's theoretically impossible to stall an aircraft with FBW.

The control surfaces on most modern airliners & military aircraft are not directly connected to the pilot's controls whether they have FBW or not. They have "artificial feel" built into them. Aircraft without FBW have stall warning horns, warning call-outs & stick shakers/pushers to give the pilot warning of an impending stall. There's not much feel about it nowadays.
 

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Reply #27 - Oct 12th, 2009 at 2:46pm

C   Offline
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Leigh wrote on Oct 12th, 2009 at 2:17am:
i spoke to an Airforce pilot and asked him whats better? a boeing or a Airbus he said

The boeing is better not by look by how it performs. Because of the FBW on the AB it doesnt have good low speed control and stuff like that. its true and i just cant remember what he said but it was the basis of the FBW on the airbuses are ruining it or something to that degree! Cheesy



Which end of him was doing the talking?!

As Doug says, if anything FBW gives far better low speed characteristics, and protection against losing control throughout the flight envelope. Smiley
 
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Reply #28 - Nov 12th, 2009 at 6:40pm

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I think the 757 and other earlier 7X7 series share the same cross section but the 757 has a deeper belly.

In the interest of aerodynamics, why did Boeing change the forward upper cockpit section over the front windscreens?

It is now more of a bulbous shape rather than the clean lines of of the earlier generation. I would think this would cause more induced drag and decreased laminar flow at high mach numbers than the older design.

Was this just to give more (un-needed) headroom in the cockpit?

At any rate, it doesn't look as good as its predecessors.
 
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Reply #29 - Nov 13th, 2009 at 8:26am

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BSW727 wrote on Nov 12th, 2009 at 6:40pm:
In the interest of aerodynamics, why did Boeing change the forward upper cockpit section over the front windscreens?


Early CFD or improved wind tunnel performance perhaps?
 
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