BRJ From United States of America, joined Jul 2008, 258 posts, RR: 0 Posted (4 years 1 month 2 weeks 1 day 18 hours ago) and read 17255 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.
CALPSAFltSkeds From United States of America, joined Dec 2006, 2234 posts, RR: 7 Reply 1, posted (4 years 1 month 2 weeks 1 day 18 hours ago) and read 17208 times:
I believe it has to do with vents and that removing windows makes the vents more efficient.
VirginFlyer From New Zealand, joined Sep 2000, 4502 posts, RR: 49 Reply 2, posted (4 years 1 month 2 weeks 1 day 17 hours ago) and read 17116 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!
MD11Engineer From Germany, joined Oct 2003, 13369 posts, RR: 64 Reply 3, posted (4 years 1 month 2 weeks 1 day 15 hours ago) and read 16976 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.
HAWK21M From India, joined Jan 2001, 31228 posts, RR: 58 Reply 4, posted (4 years 1 month 2 weeks 1 day 14 hours ago) and read 16910 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.
BRJ From United States of America, joined Jul 2008, 258 posts, RR: 0 Reply 5, posted (4 years 1 month 2 weeks 1 day 9 hours ago) and read 16729 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!
Max550 From United States of America, joined Nov 2007, 1114 posts, RR: 0 Reply 6, posted (4 years 1 month 2 weeks 1 day 8 hours ago) and read 16687 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?
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.
DingDong From United States of America, joined Jan 2007, 661 posts, RR: 0 Reply 8, posted (4 years 1 month 2 weeks 1 day 8 hours ago) and read 16652 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:
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.
AA737-823 From United States of America, joined Mar 2000, 5383 posts, RR: 11 Reply 9, posted (4 years 1 month 2 weeks 1 day 1 hour ago) and read 16424 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.
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