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Why The Change In Pax Window Design?  
User currently offlineFutureualpilot From United States of America, joined May 2000, 2608 posts, RR: 8
Posted (10 years 11 months 3 weeks 6 days 3 hours ago) and read 3150 times:

I've noticed that on new aircraft, the pax windows seem to be more oval-shaped than on older aircraft. FOr example, the windows on a 764 or 772 are more rounded than the windows on say a 744 or older 762 or 763. Why is this? What sparked the windows to be rounded off? I first noticed this on the Airbus A319/320 series for what it matters...

Note the more square windows on N108DE...


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Photo © PeachAir




As opposed to the more rounded windows of N825MH...


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Photo © Brett B. Despain




Thanks for the responses everyone!



[Edited 2003-12-04 02:50:08]


Life is better when you surf.
5 replies: All unread, jump to last
 
User currently offlineConcordeBoy From , joined Dec 1969, posts, RR:
Reply 1, posted (10 years 11 months 3 weeks 6 days 2 hours ago) and read 3125 times:

A better question would be... why not change them?

If it's inexpensive, pax-friendly, and can differentiate your product in any positive way (not matter how slight)... why not go for it  Smile


User currently offlineAreopagus From United States of America, joined Sep 2001, 1372 posts, RR: 1
Reply 2, posted (10 years 11 months 3 weeks 6 days 1 hour ago) and read 2872 times:

The more rounded windows reduce the stress at the corners, thus allowing lighter-weight frames, or higher cabin pressure (7E7).


User currently offlineBongo From Colombia, joined Oct 2003, 1863 posts, RR: 5
Reply 3, posted (10 years 11 months 3 weeks 6 days 1 hour ago) and read 2846 times:

Futureualpilot: They not only changed the windows !! they are changing everything in the planes !! better materials, better engines, better wings designs, better interior designs, better everything...everyday


MDE: First airport in the Americas visited by the A380!
User currently offlineFutureualpilot From United States of America, joined May 2000, 2608 posts, RR: 8
Reply 4, posted (10 years 11 months 3 weeks 6 days ago) and read 2734 times:

Haha, good point Bongo, but I was just wondering about this because it is one of the few noticeable design changes when just looking at an aircraft.

Thanks for the reply Aeropagus, that does make sense!



Life is better when you surf.
User currently offlineAwschucksflyer From Canada, joined Nov 2003, 150 posts, RR: 0
Reply 5, posted (10 years 11 months 3 weeks 6 days ago) and read 2717 times:

Areopagus is correct. Square windows have pressure points i.e. one in each corner. Round or oval windows distribute the pressure equally around the window. You see the same idea in arches. An arch carries the weight evenly throughout the structure.

AWSCHUCKS!


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