BRJ From United States of America, joined Jul 2008, 267 posts, RR: 0 Posted (6 years 9 months 1 week 4 days 7 hours ago) and read 26187 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.
VirginFlyer From New Zealand, joined Sep 2000, 4579 posts, RR: 36
Reply 2, posted (6 years 9 months 1 week 4 days 6 hours ago) and read 26048 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, 14811 posts, RR: 61
Reply 3, posted (6 years 9 months 1 week 4 days 4 hours ago) and read 25908 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, 31851 posts, RR: 54
Reply 4, posted (6 years 9 months 1 week 4 days 3 hours ago) and read 25842 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.
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 (6 years 9 months 1 week 3 days 21 hours ago) and read 25584 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:
AA737-823 From United States of America, joined Mar 2000, 6247 posts, RR: 9
Reply 9, posted (6 years 9 months 1 week 3 days 15 hours ago) and read 25356 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.