Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
737-800 Window Question  
User currently offlineBRJ From United States of America, joined Jul 2008, 263 posts, RR: 0
Posted (5 years 3 months 2 weeks 5 days 12 hours ago) and read 21394 times:

I am sure this has been discussed before, but why is that the window layout on the 737-800s do not match. What I am referring to is the windows on one side of the aircraft has a break, one window, another break and then 3 windows before the over-wing exits. On the other side of the aircraft, there is just one break and then the 3 windows before the over-wing exits. I thought maybe it was an airline preference type of thing, but I have noticed this on both Delta and Continental 738s.

9 replies: All unread, jump to last
 
User currently offlineCALPSAFltSkeds From United States of America, joined Dec 2006, 2613 posts, RR: 9
Reply 1, posted (5 years 3 months 2 weeks 5 days 11 hours ago) and read 21347 times:

I believe it has to do with vents and that removing windows makes the vents more efficient.

User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4537 posts, RR: 41
Reply 2, posted (5 years 3 months 2 weeks 5 days 10 hours ago) and read 21255 times:

It is where the ducting for bleed air from the engines. Why there is one on the right and two on the left, I've got no idea. You'll notice gaps in the windows near the wing on most aircraft for the same reason. Darn nuisance when you ask for a window seat and end up without the window!


View Large View Medium
Click here for bigger photo!

Photo © Air Sheep
View Large View Medium
Click here for bigger photo!

Photo © Ivan Nishimura



View Large View Medium
Click here for bigger photo!

Photo © Randall Johnson
View Large View Medium
Click here for bigger photo!

Photo © Juan Carlos Guerra - APM



V/F



"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineMD11Engineer From Germany, joined Oct 2003, 13985 posts, RR: 62
Reply 3, posted (5 years 3 months 2 weeks 5 days 8 hours ago) and read 21115 times:

The windowless spaces are where the airconditioning ducts go up from the mixing manifold compartment just in front of the wing box to the distribution duct in the cabin ceiling. You'll find the same on the 737 classics. The 737 Jurassic had lots of smaller tubes between the windows (as has the A320), but on subsequent 737 models it was decided to install one large duct for each zone instead of multiple smaller ones.

Jan


User currently offlineHAWK21M From India, joined Jan 2001, 31679 posts, RR: 56
Reply 4, posted (5 years 3 months 2 weeks 5 days 7 hours ago) and read 21049 times:

As Jan correctly explained it.....AC Ducts going from the Main Distribution manifold to the overhead duct.
The B732 had numerous smaller hoses connecting to a common manifold from the Fwd right side.This was prone to leaks over time.
The B733 onwards had a wider manifold.

regds
MEL.



Think of the brighter side!
User currently offlineBRJ From United States of America, joined Jul 2008, 263 posts, RR: 0
Reply 5, posted (5 years 3 months 2 weeks 5 days 2 hours ago) and read 20868 times:

Awesome..thanks for all the information...very helpful and good to know!!
I assume this is the same explanation for models like the 767s where they have these 'breaks' as well??

Quoting VirginFlyer (Reply 2):
Darn nuisance when you ask for a window seat and end up without the window!

Yeah tell me about it...I've made that mistake before! Very disappointing!


User currently offlineMax550 From United States of America, joined Nov 2007, 1148 posts, RR: 0
Reply 6, posted (5 years 3 months 2 weeks 5 days 2 hours ago) and read 20826 times:



Quoting BRJ (Reply 5):
I assume this is the same explanation for models like the 767s where they have these 'breaks' as well??

I was wondering the same thing, but with the 777, I noticed two windows missing, then a big spot by the door in front of the wing, is that the same thing or is it where the galley/lavs, etc... are?

View Large View Medium
Click here for bigger photo!

Photo © Michael Frische



View Large View Medium
Click here for bigger photo!

Photo © K.H.Yim



User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4537 posts, RR: 41
Reply 7, posted (5 years 3 months 2 weeks 5 days 2 hours ago) and read 20812 times:



Quoting BRJ (Reply 5):
I assume this is the same explanation for models like the 767s where they have these 'breaks' as well??

Yes, that's correct. Flight Global's website has some good cutaway images which illustrate these riser ducts.

http://www.flightglobal.com/AIRSPACE...s/boeing-737-400-cutaway-7818.aspx
http://www.flightglobal.com/AIRSPACE...es/7823/boeing-747-400-cutaway.jpg
http://www.flightglobal.com/AIRSPACE.../7827/boeing-767-400er-cutaway.jpg

You will notice a similar window gap towards the rear of the 787 - this is something different - it is where the fuselage barrels are joined. The original plan had been to make the join between windows and not leave a gap, but I believe (and someone correct me on this if I have the details wrong) this resulted in a weight penalty, so a simpler design which leaves a window gap was used.


View Large View Medium
Click here for bigger photo!

Photo © Kok Chwee SIM
View Large View Medium
Click here for bigger photo!

Photo © Kok Chwee SIM



V/F



"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineDingDong From United States of America, joined Jan 2007, 661 posts, RR: 0
Reply 8, posted (5 years 3 months 2 weeks 5 days 2 hours ago) and read 20791 times:

Quoting Max550 (Reply 6):
I was wondering the same thing, but with the 777, I noticed two windows missing, then a big spot by the door in front of the wing, is that the same thing or is it where the galley/lavs, etc... are?

If you're referring to door 2L (or 2R), probably due to the galley/lav by it:

http://www.seatguru.com/airlines/ANA/ANA_Boeing_777-200ER_A.php

Though it's certainly possible the galley/lav location was partly chosen to accommodate the ducting there -- I honestly don't recall much about the B777 wiring/tubing layout.

[Edited 2009-05-06 06:02:11]


DingDong, honey, please answer the doorbell!
User currently offlineAA737-823 From United States of America, joined Mar 2000, 5766 posts, RR: 11
Reply 9, posted (5 years 3 months 2 weeks 4 days 19 hours ago) and read 20563 times:

As far as why the 738/739 is missing THREE windows, whereas the 736/73G are missing only TWO, it's because the two groups employ very different cabin AirCon systems. The 737-6/700 utilizes a simpler, two-pack system. Pack #1 predominantly conditions the forward portions of the cabin, #2 air travels to aft portions. One riser per pack = two window plugs.

The 737-800 and -900 use ZONES. They still have two packs, but actually have three zones. And there's one riser for each zone.


Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Delta 737-800 Question posted Mon Mar 2 2009 19:07:15 by SXDFC
Alaska Airlines 737-800 Question posted Mon Apr 14 2008 10:47:56 by FlyPBA
TK 737-800 "Eyebrow" Question posted Sun Dec 3 2006 16:33:30 by TurkishWings
AA 737-800 Video Monitor Question posted Sat Dec 17 2005 05:52:37 by Tu154
DL 737-800 Question posted Tue Apr 26 2005 18:58:46 by Pbiflyer
CO 737-800 Question posted Fri Dec 17 2004 20:55:47 by Usairways16bwi
Question About Contientals 737-800 Transcon posted Fri Sep 3 1999 18:48:58 by VIflyer
AA Tours Its Newest 737-800 (videos) posted Wed Apr 15 2009 05:46:29 by 797
AA 737-800 Reg Help Please 09FEB posted Tue Feb 10 2009 13:56:35 by CodyKDiamond
Does CO 737-800 Have Seatside 110V Outlets? posted Sat Jan 31 2009 16:07:42 by Comorin
Sun Country 737-800 Question posted Mon Sep 7 2009 10:35:05 by Crownvic
Delta 737-800 Question posted Mon Mar 2 2009 19:07:15 by SXDFC
Alaska Airlines 737-800 Question posted Mon Apr 14 2008 10:47:56 by FlyPBA
TK 737-800 "Eyebrow" Question posted Sun Dec 3 2006 16:33:30 by TurkishWings
AA 737-800 Video Monitor Question posted Sat Dec 17 2005 05:52:37 by Tu154
DL 737-800 Question posted Tue Apr 26 2005 18:58:46 by Pbiflyer
CO 737-800 Question posted Fri Dec 17 2004 20:55:47 by Usairways16bwi
Question About Contientals 737-800 Transcon posted Fri Sep 3 1999 18:48:58 by VIflyer
Ethiopian 737-800 At Washington Last Night posted Fri Apr 13 2012 17:54:08 by iadbudd
Sun Country 737-800 Question posted Mon Sep 7 2009 10:35:05 by Crownvic
Delta 737-800 Question posted Mon Mar 2 2009 19:07:15 by SXDFC
Alaska Airlines 737-800 Question posted Mon Apr 14 2008 10:47:56 by FlyPBA
TK 737-800 "Eyebrow" Question posted Sun Dec 3 2006 16:33:30 by TurkishWings
AA 737-800 Video Monitor Question posted Sat Dec 17 2005 05:52:37 by Tu154
DL 737-800 Question posted Tue Apr 26 2005 18:58:46 by Pbiflyer
CO 737-800 Question posted Fri Dec 17 2004 20:55:47 by Usairways16bwi
Question About Contientals 737-800 Transcon posted Fri Sep 3 1999 18:48:58 by VIflyer
Experience Onboard EgyptAir 737-800 posted Wed May 2 2012 02:56:41 by oykie
Alaska Airlines 737-800 Question posted Mon Apr 14 2008 10:47:56 by FlyPBA
TK 737-800 "Eyebrow" Question posted Sun Dec 3 2006 16:33:30 by TurkishWings
AA 737-800 Video Monitor Question posted Sat Dec 17 2005 05:52:37 by Tu154
DL 737-800 Question posted Tue Apr 26 2005 18:58:46 by Pbiflyer
CO 737-800 Question posted Fri Dec 17 2004 20:55:47 by Usairways16bwi
Question About Contientals 737-800 Transcon posted Fri Sep 3 1999 18:48:58 by VIflyer
Experience Onboard EgyptAir 737-800 posted Wed May 2 2012 02:56:41 by oykie
Delta 737-800 Question posted Mon Mar 2 2009 19:07:15 by SXDFC
Alaska Airlines 737-800 Question posted Mon Apr 14 2008 10:47:56 by FlyPBA
TK 737-800 "Eyebrow" Question posted Sun Dec 3 2006 16:33:30 by TurkishWings
AA 737-800 Video Monitor Question posted Sat Dec 17 2005 05:52:37 by Tu154
DL 737-800 Question posted Tue Apr 26 2005 18:58:46 by Pbiflyer
CO 737-800 Question posted Fri Dec 17 2004 20:55:47 by Usairways16bwi
Question About Contientals 737-800 Transcon posted Fri Sep 3 1999 18:48:58 by VIflyer
Experience Onboard EgyptAir 737-800 posted Wed May 2 2012 02:56:41 by oykie