The BrainFood Show

Why Don't Plane Windows and Seats Line Up?


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While airplane manufacturers do design the planes with general row

positioning and pitch (the measurement from one seat to the same exact
point on the seat in front or behind it) in mind, with the windows often
lining up with the seats, the designers' exact recommended arrangement
is rarely, if ever, followed. You see, the final placement of seats is
left up to the individual airlines that purchase the plane.
To make the seating arrangement as flexible as possible for airlines,
there are multiple tracks on the floors that the seats are mounted on.
This allows the seats to easily be moved closer together or farther
apart. The airlines can even switch the aisle arrangement via moving a
line of seats to a completely different track.
For example, on some versions of the Boeing 777, Boeing recommends a
layout of 3+3+3 with a 32 inch (81.2 cm) pitch for economy passengers.
In this layout, you need a passenger density of 67% before a passenger
may be required to sit next to someone else. And if some passengers
choose to sit next to one another, the percentage is even higher before
other passengers must sit next to someone. Boeing recommends this layout
because, in internal studies they've conducted, they claim that one of
the biggest factors in passenger perception of comfort on a flight is
whether there is someone directly next to them or not.
Nevertheless, disregarding the manufacturer recommendation, pitch on
a...


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