captainstefan From United States of America, joined May 2007, 338 posts, RR: 0 Posted (10 months 1 week 10 hours ago) and read 7664 times:
I did some digging around the forum database and couldn't find anything conclusive regarding this subject -
1. Why didn't Boeing use the 777/764 style windows on the 737NGs?
2. Will the 737max series feature the new window shape?
Since the 737NGs entered service about 3 years after the 777 did how come Boeing did not choose to put the new windows in the NG, like they did with the 767-400ER (with respect to the -300)?
XT6Wagon From United States of America, joined Feb 2007, 3133 posts, RR: 4 Reply 1, posted (10 months 1 week 10 hours ago) and read 7604 times:
larger windows = more wieght. You have to have a much stronger structure around the widow to deal with the weakness the hole creates. Then you have the wieght of the window itself.
The 787 got bigger windows as it was nearly free with the skin thickness required for impact damage being much greater than required for simple pressurization loads, making holes requires less extra reinforcement.
The 748i got 777 windows as a way to save money, but I think if Boeing knew the engineering costs they might have even skipped this, as this was part of the cost over-run issue.
While I don't know about the 764, I'd assume its the same as the 748i, where it was done to save money by using more modern and cheaper window assemblies.
The MAX is a minimum change airplane. Unless it significantly improved customer satisfaction, changes aren't being made. There are new window reveals and sidewalls on the 737NG Sky Interior. On the MAX they are avoiding mission creep like they allowed on the 747-8, which did end up with new cabin windows.
If you have never designed an airplane part before, let the real designers do the work!
I hope not; as a passenger it would be nice but as an engineer that's a supply chain risk that just doesn't need to be baked into the MAX (Boeing doesn't build the 737 fuselage anymore). Plus, changing the window belt would certainly require more structural testing than not.
AirframeAS From United States of America, joined Feb 2004, 14150 posts, RR: 26 Reply 4, posted (10 months 1 week 7 hours ago) and read 7121 times:
When the MAX comes out, is there any way that the current windows can be configured to dim like the 787 windows do? That would be awesome to see!
Quoting Roseflyer (Reply 2): There are new window reveals and sidewalls on the 737NG Sky Interior.
Just so that I understand you correctly, the windows themselves are the exact same shape as the older models, the sidewall panels inside the airplane make it look like that the windows are round, when in fact, it is not. I got the opportunity to see one of our newer airplanes at UA with the SkyInterior and was surprised by the new sidewall look. Pretty nice, if you ask me!
A Safe Flight Begins With Quality Maintenance On The Ground.
Roseflyer From United States of America, joined Feb 2004, 8754 posts, RR: 52 Reply 5, posted (10 months 1 week 5 hours ago) and read 6839 times:
Quoting AirframeAS (Reply 4): When the MAX comes out, is there any way that the current windows can be configured to dim like the 787 windows do? That would be awesome to see!
It would be possible but such design changes cost too much money in an existing design. The interior is going to be virtually the same as the sky interior.
If you have never designed an airplane part before, let the real designers do the work!
odwyerpw From Mexico, joined Dec 2004, 645 posts, RR: 3 Reply 6, posted (10 months 1 week 2 hours ago) and read 6544 times:
It's not the windows many of us would like to see changed. It's the Windscreens. But nothing to be done there. Those tiny cockpit windows and windshields will be around for another 20 years. You could never justify giving the 737Max a new windshield.
garpd From UK - Scotland, joined Aug 2005, 2313 posts, RR: 4 Reply 7, posted (10 months 1 week ago) and read 6386 times:
Quoting odwyerpw (Reply 6): It's not the windows many of us would like to see changed. It's the Windscreens. But nothing to be done there. Those tiny cockpit windows and windshields will be around for another 20 years. You could never justify giving the 737Max a new windshield.
Over the years many here have suggested putting a 757'767 section 41 on the 737. This is obviously far too expensive an undertaking to even consider, but an interesting idea nonetheless.
captainstefan From United States of America, joined May 2007, 338 posts, RR: 0 Reply 8, posted (10 months 6 days 14 hours ago) and read 4260 times:
Thanks everyone - that makes sense. I now wonder what there was to be gained by changing the window style on the 767-400?
Quoting odwyerpw (Reply 6):
It's not the windows many of us would like to see changed. It's the Windscreens. But nothing to be done there. Those tiny cockpit windows and windshields will be around for another 20 years. You could never justify giving the 737Max a new windshield.
One interesting thing I noticed is that it *appears* that Delta has painted over/otherwise removed the eyebrow windows on the 737s. I couldn't understand why, they're incredibly useful in most >10 degree turns. Maybe to accommodate the installation of the HUD?
by738 From US Minor Outlying Islands, joined Sep 2000, 1986 posts, RR: 1 Reply 9, posted (10 months 6 days 14 hours ago) and read 4097 times:
Lots available in a search for eyebrow windows. They were removed as cost saving for maintenance etc as TCAs and other navigational aids etc has rendered them obsolete. I dont think they were "painted over", they would have been replaced with permanent plugs.
N766UA From United States of America, joined Jul 1999, 7996 posts, RR: 27 Reply 11, posted (10 months 6 days 12 hours ago) and read 2831 times:
Quoting captainstefan (Reply 8): One interesting thing I noticed is that it *appears* that Delta has painted over/otherwise removed the eyebrow windows on the 737s. I couldn't understand why, they're incredibly useful in most >10 degree turns. Maybe to accommodate the installation of the HUD?
By removing the windows you save weight. Also, with advances in TCAS, for example, the need to see in banked turns is (theoretically) greatly diminished, thus the window is no longer useful. Also, how many MD80/737 eyebrows do you see with safety cards jammed in them? The sun comes through right into crew's eyes more often than not.
Viscount724 From Switzerland, joined Oct 2006, 21498 posts, RR: 24 Reply 12, posted (10 months 6 days 12 hours ago) and read 2716 times:
Quoting N766UA (Reply 11): Quoting captainstefan (Reply 8):
One interesting thing I noticed is that it *appears* that Delta has painted over/otherwise removed the eyebrow windows on the 737s. I couldn't understand why, they're incredibly useful in most >10 degree turns. Maybe to accommodate the installation of the HUD?
By removing the windows you save weight. Also, with advances in TCAS, for example, the need to see in banked turns is (theoretically) greatly diminished, thus the window is no longer useful. Also, how many MD80/737 eyebrows do you see with safety cards jammed in them? The sun comes through right into crew's eyes more often than not.
odwyerpw From Mexico, joined Dec 2004, 645 posts, RR: 3 Reply 13, posted (10 months 6 days 10 hours ago) and read 1948 times:
When I first saw the new interior, with the reshaped reveals, I did wonder if it was a step to introducing 777/764/748 windows on future 737 derivatives. But like most, concluded there would be no cost justification, even if the newer windows themselves were cheaper/lighter.
Because the 737NG is still a 737 why would you change much of an already FANTASTIC plane, cheap to operate why would you change that! make sense well done Boeing
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