ratt
Topic Author
Posts: 4
Joined: Fri Nov 13, 2015 4:08 pm

Gap in the windows on 787s, why?

Fri Oct 19, 2018 12:07 am

Been curious about this for awhile. I've tried googling this with no answer. So, why does the 787 have the gap in the windows towards the back of the fuselage? First question here so I'm hoping I'm not beaten up because I'm not aware of something obvious.
 
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Dan23
Posts: 164
Joined: Thu Jun 30, 2005 11:12 am

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 12:15 am

The gap is where the join between the fuselage barrel sections is located. There is also one forward of the wings.


Edit: Photo of the location of the rear fuselage join on a 787-10:

Image
Last edited by Dan23 on Fri Oct 19, 2018 12:25 am, edited 1 time in total.
 
ratt
Topic Author
Posts: 4
Joined: Fri Nov 13, 2015 4:08 pm

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 12:22 am

Thanks Dan23, so i guess my follow-up question is why don't you see this in other plane types or do they position the joins where the toilet or galley sections are mid-plane thus not impacting the seating areas?
 
ikramerica
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Joined: Mon May 23, 2005 9:33 am

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 12:24 am

ratt wrote:
Thanks Dan23, so i guess my follow-up question is why don't you see this in other plane types or do they position the joins where the toilet or galley sections are mid-plane thus not impacting the seating areas?

Missing windows appear in all types. But since most other types are not built as barrels to join in the same way, the seams may not require a missing window between every section.
Of all the things to worry about... the Wookie has no pants.
 
Opaque
Posts: 18
Joined: Sun Jul 16, 2017 11:22 am

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 12:40 am

The original design actually had a window there, with one half of the window in each barrel section, and the seam going right through the middle of the window, but at later stages they found the need for further strengthening, so the windows were removed.
 
Art at ISP
Posts: 223
Joined: Sat Jan 27, 2001 10:31 am

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 1:26 am

And in many cases the missing windows just ahead of the wings are for air ducts.
 
mabadia71
Posts: 62
Joined: Thu Nov 06, 2008 12:02 am

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 2:10 am

Here's a video that explains it on the 737
https://www.youtube.com/watch?v=z2wRNd5BLiM
mabadia71
 
ratt
Topic Author
Posts: 4
Joined: Fri Nov 13, 2015 4:08 pm

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 2:28 am

Thanks all for the informative replies, I know more than a few hours ago, always a good thing. Cheers.
 
WIederling
Posts: 8939
Joined: Sun Sep 13, 2015 2:15 pm

Re: Gap in the windows on 787s, why?

Fri Oct 19, 2018 8:08 am

ikramerica wrote:
ratt wrote:
Thanks Dan23, so i guess my follow-up question is why don't you see this in other plane types or do they position the joins where the toilet or galley sections are mid-plane thus not impacting the seating areas?

Missing windows appear in all types. But since most other types are not built as barrels to join in the same way, the seams may not require a missing window between every section.


The 787 was to have windows saddling the join. This was shown to be technically inopportune.
Murphy is an optimist

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