pvn

They are not the same tube. They have the same width but the cross sections are different.

Scrooge McDuck

Almost all AB (and subsidiaries) planes are leased and the huge majority of them are already "taken" by either LH group or U2. Most of the rest will most likely go to whoever takes Niki. Almost no planes are left.

JSprague24

The 757 still feels "taller" on the inside, though the Boeing Sky Interior took a bit of that feel away. Still, sitting in a seat, I can tell I'm on a 757.

meh130

The 727, 737, and 757 use identical fuselage frames. The interior trim to trim widths are listed as slightly different. I think some of this may be due to the measurement point (wider at the windows, narrower between the windows where the fuselage frame is). Or it may be due to how the air conditioning ducting is done (the 737 and 757 use a few large ducts taking the place of a window, the 727 used two small ducts alongside each window--the 737/757 solution is much lighter). This large ducts may mark the narrowest part of the widest cross section.

Other factors could be insulation, but it seems over time thinner, lighter insulation would be the norm, resulting in wider cabins (like the 777X). So my guess is the narrower trim to trim difference between the 727 and 737/757 is the A/C ducting.

But for the typical non exit row seat with a window, there is no significant difference of interior cabin width.

meh130

This was definitely the "feel" of the original 757 overhead bin design, where there was a gap between the ceiling and the top of the bin. It was very different from the older 727 and 737 overhead bin design of the time. The intent was to make the ceiling feel wider, and make the airplane feel wider, but it made it feel higher as well.

Then they extended those bins which made the space above the aisle slightly narrower, which also may have had the side effect of making it feel higher.

Narrow-body airplane pivot bins create a challenge, because they return to the continuous trim like the early 1980s 727 bins.

Mountain Explorer

Great question. Was funny watching people squirm and make up stories about floor height (false), fuselage difference (false), takeoff roll (how does this possibly affect passenger comfort?)

pvn

Can anyone produce documentation that they are actually the same?

3Cforme

See slide 8 for detailed 757 interior dimensions, including prospective seating arrangements by cabin.

http://www.boeing.com/resources/boei..._passenger.pdf

737s have shared the same interior cabin width (3.53 meters) from -100s to -900ERs. I'll let others look for more detailed 737 specs if they feel the need.

Boeing 737 Detailed Technical Data

readywhenyouare

pvn

Cabin width being the same isn't in dispute. That's a necessary but not sufficient condition of showing they're the same.

jimrpa

Can't the door be moved forward? Also, I'm fairly surprised about the comment of a jet bridge strike. Seems like the 757s, which have similar passenger capacity to the A321s don't have that problem?

3Cforme

See PDF page 67 and describe what's meaningfully different from a 757 at cabin floor, passenger hip, or passenger shoulder height.

http://www.boeing.com/assets/pdf/com.../acaps/737.pdf

Are passengers on 739s complaining about the extra 1.9 inches of cabin height when they observe the config is tight?

readywhenyouare

pvn

"two things are different"

"OK, show me"

"here's a diagram of one of them, QED"

OK, I'm convinced

readywhenyouare