SXDFC
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737 Door Outline Question(s)

Mon Sep 29, 2008 10:07 pm

Hey Guys:

Here I go again with another 737 question, I noticed on a few 737's they have this cool door outline that curves before the actual door ends. My question is why are the outlines painted like this. Also is Southwest going to incorporate this design onto its 73NG's too?

Heres an example :


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Photo © Gert Rosmann - AirTeamImages

ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
EMBQA
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 10:44 pm

I have no idea what you're seeing or talking about...??? Can you better point it out...? The grey band around the door...? Every single commercial aircraft in the world has that. It's design is to aid rescue workers in finding the door cut out. My guess would be it will draw your eyes towards it. The chrome trim at the bottom..? Nearly every single commercial aircraft has that as well. It protects the door sill from jetway damage

[Edited 2008-09-29 15:56:48]
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
SXDFC
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:05 pm



Quoting EMBQA (Reply 1):
I have no idea what you're seeing or talking about...??? Can you better point it out...? T

Sure heres a close up:

This close up comes from the picture taken by Rich Schlamp on Flickr.




The area I am talking about is circled in black.

From what I know the actual door its self fits the entire frame, so this is why I ask why the outline ends short of that chrome (dark colored) bottom.
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
rampkontroler
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:12 pm

What he is talking about is the fact that the bottom of the door is actually below the outline provided for it. It's easier to see in this shot:

http://www.airliners.net/photo/TUIfly/Boeing-737-7K5/1387959/L/

Whereas, it's more common for the outline to actually extend to the true bottom of the door as in these shots:

http://www.airliners.net/photo/Turki...Airlines/Boeing-737-4Y0/1403824/L/

http://www.airliners.net/photo/Briti...-Airways/Boeing-737-436/1403645/L/

Why the TUI aircraft outline doesn't seem to reach the actual bottom of the door, I don't know...
 
EMBQA
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:19 pm



Quoting SXDFC (Reply 2):
Sure heres a close up:

That is the bumper plate I mentioned above... most all commercial aircraft...including Southwest.. have them
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
EMBQA
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:23 pm



Quoting SXDFC (Reply 2):
Sure heres a close up:

That is the bumper plate I mentioned above... most all commercial aircraft...including Southwest. I don't understand why that airline elected to 'shorten up' the door band and not fully out line it. I've never seen that before
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
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Starlionblue
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:32 pm

Escape slide hatch outline?
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
SXDFC
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:36 pm

EMBQA:

This is what I am talking about- its not the bumper plate :



[quote=Rampkontroler,reply=3]What he is talking about is the fact that the bottom of the door is actually below the outline provided for it. It's easier to see in this shot:

http://www.airliners.net/photo/TUIfly/Boeing-737-7K5/1387959/L/[/quote

as you can see the door its self ends at the bumperplate, but the actual door outline ends about a foot before it- what I am talking about is the actual door outline ( which is a light gray)
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SXDFC
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:40 pm

It seems like this is also found on the Airbus planes as well:



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Photo © Michael Carter



Sure is interesting.....

For those still scracthing their heads at what I am talking about its in this picture, as you can clearly see where the outline ends and where the door ends.


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Photo © M�©sz�¡ros Tibor



[Edited 2008-09-29 16:44:20]
ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
EMBQA
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RE: 737 Door Outline Question(s)

Mon Sep 29, 2008 11:41 pm



Quoting SXDFC (Reply 7):

This is what I am talking about- its not the bumper plate :

For some reason this airline decided to not fully outline the door. Why I don't know.....
"It's not the size of the dog in the fight, but the size of the fight in the dog"
 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 12:29 am

This laymans explanation...

Remember this door is a plug type. To open it has to go in first and then out - that means that the door has to get smaller somehow. The painted area at the bottom of the door is a panel that opens inward when the door is opened - I'm guessing it's a pressure relief door as well as a means to make the pax door smaller.

Why it's painted differently than the WN 737 below... I have no idea....


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Photo © Tim Perkins


In the pix below you can see how the panel at bottom of the door folds in just a bit...


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Photo © Marlo Plate - Iberian Spotters



[Edited 2008-09-29 17:35:48]
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474218
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 1:02 am

Its a stainless steel threshold plate it is attach to the fuselage skin and the door opening . It protects the aluminum structure from the jetways and passengers that would step right on the edge of the door opening.
 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 1:15 am



Quoting 474218 (Reply 11):
Its a stainless steel threshold plate it is attach to the fuselage skin and the door opening .

The area under discussion is just above the item you mention.
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474218
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 2:26 am

Quoting ZANL188 (Reply 12):
The area under discussion is just above the item you mention.

The only thing above the item I am talking a the door opening, or the door if its closed.

Enlarge the following picture it shows the stainless steel door threshold very clearly and that the door extends below the outlined area:




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Photo © Baires Aviation Photography


[Edited 2008-09-29 19:31:00]

[Edited 2008-09-29 19:31:48]
 
rampkontroler
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 2:34 am



Quoting 474218 (Reply 13):
Enlarge the following picture it shows the stainless steel door threshold very clearly and that the door extends below the outlined area:

Yes...you guys are talking about the same thing, just saying it differently! It's apparent that on some aircraft, the door outline does not exactly outline the door. The initial poster noted that and wondered why. You are stating the same thing, but getting hung up on the threshold!
 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 12:14 pm



Quoting 474218 (Reply 13):
The only thing above the item I am talking a the door opening, or the door if its closed.

There is a panel attached to the bottom of the door that folds inward on opening. It is not the threshold - the threshold is beneath it.
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474218
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 2:40 pm



Quoting ZANL188 (Reply 15):
There is a panel attached to the bottom of the door that folds inward on opening. It is not the threshold - the threshold is beneath it.

I think that panel is actually part of the door, not attached to it. In the picture below you can see the door, the panel and the stainless steel threshold.


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Photo © Jakub Nanowski - EPGD Spotters

 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 3:15 pm



Quoting 474218 (Reply 16):
actually part of the door, not attached to it

How can something be part of the door... yet not attached to it? The panel moves inward when opening the door.
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HAWK21M
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 3:35 pm

Nicknamed the " Door scuff plate"
regds
MEL
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LHRBFSTrident
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 4:51 pm



Quoting SXDFC (Thread starter):
few 737's they have this cool door outline that curves before the actual door ends. My question is why are the outlines painted like this. Also is Southwest going to incorporate this design onto its 73NG's too?

I've noticed this on newer a/c recently - mainly 737NGs and new A320s - even on new A330s.

I don't know why the door outline isn't painted all the way down to the scuff plate, but from an aesthetic point of view it certainly looks better.


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Photo © Simon Gregory - Jetwash Images

A330-200 EI-DUO

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Photo © A M Spalding

A330-300 EI-DUZ

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Photo © Stefan Sonnenberg

A330-300 D-AERK
 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 6:16 pm

Here's a 737 sans paint. The panels at the top and bottom of the door are plainly visible.


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rampkontroler
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 6:38 pm

To get back to the original question, I think that maybe it's just a stylistic choice made by the airlines themselves. There doesn't seem to be a rhyme or reason as to who paints the door trim all the way to the bottom, and who doesn't.

I can't remember...is it actual paint, or is it an adhesive sticker?
 
474218
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 7:45 pm



Quoting ZANL188 (Reply 17):

How can something be part of the door... yet not attached to it? The panel moves inward when opening the door.

That was my point all along, it is an integral part of the door, not something just attached to the door.
 
zanl188
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 8:07 pm



Quoting 474218 (Reply 22):
That was my point all along, it is an integral part of the door, not something just attached to the door.

Well ok... but the door has lots of parts, "integral" or attached - your choice. Personally I prefer all the parts be attached...  Smile

Now, why is the paint different on this bit of the door - attached or integral??
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rampkontroler
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 8:56 pm



Quoting ZANL188 (Reply 23):
Now, why is the paint different on this bit of the door - attached or integral??

I'm pretty sure that's what he wants to know! Just to be sure, (and with apologies to the guys who's photos I snipped the doors from), this is what he's talking about...

Big version: Width: 750 Height: 419 File size: 67kb


The door outline reaches all the way to the threshold on the Southwest bird, and comes up short on the Copa one. I think you realize that, but he wants to know why? It may be a silly question, but I have to admit that now I am curious too! I'm sure it all boils down to each airline's particular aesthetics.

As for this question: Also is Southwest going to incorporate this design onto its 73NG's too? I guess the answer would be "no" because the photo above is a 73NG, and it goes all the way to the threshold.
 
SXDFC
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RE: 737 Door Outline Question(s)

Tue Sep 30, 2008 9:35 pm



Quoting Rampkontroler (Reply 24):

You hit the nail right on the head! Thank You!

Quoting LHRBFSTrident (Reply 19):
aesthetic point of view it certainly looks better.

That is what I think too! it makes the plane look newer, unlike the old design.
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zanl188
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RE: 737 Door Outline Question(s)

Wed Oct 01, 2008 12:32 am



Quoting SXDFC (Reply 25):
You hit the nail right on the head! Thank You!

Except that the function of that piece of the hull very likely has something to do with your question. If we can understand the function it may be easier to understand why it's painted the way that is......
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rampkontroler
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RE: 737 Door Outline Question(s)

Wed Oct 01, 2008 12:54 am



Quoting ZANL188 (Reply 26):
Except that the function of that piece of the hull very likely has something to do with your question. If we can understand the function it may be easier to understand why it's painted the way that is......

The exact same airplane type can have it painted both ways, so I don't believe it has anything to do with any real 'purpose.' We know why the doors are outlined that way (to aid in rescue efforts)...but why can two aircraft of the exact same type have it painted in different ways?

That's all we're wondering...curious minds want to know!  Smile
 
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HAWK21M
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RE: 737 Door Outline Question(s)

Wed Oct 01, 2008 1:19 am



Quoting Rampkontroler (Reply 24):

The Difference is in the paint job.I wonder why the RH one was painted that way ie excluding the lower gate.The function is the same.
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MEL
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