futureualpilot
Posts: 2402
Joined: Thu May 25, 2000 10:52 am

Why The Change In Pax Window Design?

Thu Dec 04, 2003 10:49 am

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...


View Large View Medium

Photo © PeachAir




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


View Large View Medium

Photo © Brett B. Despain




Thanks for the responses everyone!



[Edited 2003-12-04 02:50:08]
Life is better when you surf.
 
ConcordeBoy
Posts: 16852
Joined: Thu Feb 01, 2001 8:04 am

RE: Why The Change In Pax Window Design?

Thu Dec 04, 2003 10:55 am

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
Faire du ciel le plus bel endroit de la terre c'est impossible sans Concorde!
 
Areopagus
Posts: 1327
Joined: Thu Sep 20, 2001 12:31 pm

RE: Why The Change In Pax Window Design?

Thu Dec 04, 2003 12:11 pm

The more rounded windows reduce the stress at the corners, thus allowing lighter-weight frames, or higher cabin pressure (7E7).
 
bongo
Posts: 1783
Joined: Sat Oct 04, 2003 5:32 am

RE: Why The Change In Pax Window Design?

Thu Dec 04, 2003 12:22 pm

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!
 
futureualpilot
Posts: 2402
Joined: Thu May 25, 2000 10:52 am

RE: Why The Change In Pax Window Design?

Thu Dec 04, 2003 12:54 pm

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.
 
awschucksflyer
Posts: 135
Joined: Tue Nov 04, 2003 3:02 am

RE: Why The Change In Pax Window Design?

Thu Dec 04, 2003 12:59 pm

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.

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