cockpitvisit
1st Apr 2008, 02:20
Dreamliner to feature lie-flat seats in all travel classes
April 1, 2008
Boeing announced radical changes in the flight control software and the wing design of the 787 today. Following the
changes, the fuselage in the straight level flight will not be horizontal, but will have a pitch of 20 degrees,
allowing the installation of lie-flat seats in all three travel classes.
The changes were made at the request of airline customers. According to a Boeing spokesman, "it is not the first
time the delivery of a new airplane model is delayed by customer requests. But for the very first time, the only
reason for a delivery delay is to improve the passenger comfort."
The changes came after wind tunnel tests revealed that the 787 wing had a surprisingly high lift even at slightly
negative angles of attack. This allowed changing the design so that the fuselage would be tilted in straight level
flight and at the same time still allow takeoffs and landings like a conventional airplane.
In the first and business classes, seat rows will be laid out as individual terraces, allowing more privacy than on
conventional airplanes with a horizontal floor. A prototype business class cabin design by the launch customer ANA
shows orchids hanging from the seatbacks. In the economy class, the seats will look more like hammocks than
conventional airline seats.
The new layout required redesign of many systems, from the hydraulics system that will now have to deal with
pressure differentials, to the way the service trolley moves on the now tilted cabin floor. The service trolley
will now be hooked to a cable with a counterweight mounted under the cabin floor. This brings a safety improvement
too, because when the Dreamliner hits turbulence, a pulley will automatically move the trolley to a safe position
while the flight attendants head for the nearest seats available. Airlines are exploring the option of mounting the
trolley on rails, so that the passengers could call it and serve themselves even during turbulence.
Ironically, the new layout will require the installation of handrails in the cabin, which will make the Dreamliner
cabin look a bit like commuter buses which are dreaded by most frequent flyers.
(Source (http://tinyurl.com/395w9a))
April 1, 2008
Boeing announced radical changes in the flight control software and the wing design of the 787 today. Following the
changes, the fuselage in the straight level flight will not be horizontal, but will have a pitch of 20 degrees,
allowing the installation of lie-flat seats in all three travel classes.
The changes were made at the request of airline customers. According to a Boeing spokesman, "it is not the first
time the delivery of a new airplane model is delayed by customer requests. But for the very first time, the only
reason for a delivery delay is to improve the passenger comfort."
The changes came after wind tunnel tests revealed that the 787 wing had a surprisingly high lift even at slightly
negative angles of attack. This allowed changing the design so that the fuselage would be tilted in straight level
flight and at the same time still allow takeoffs and landings like a conventional airplane.
In the first and business classes, seat rows will be laid out as individual terraces, allowing more privacy than on
conventional airplanes with a horizontal floor. A prototype business class cabin design by the launch customer ANA
shows orchids hanging from the seatbacks. In the economy class, the seats will look more like hammocks than
conventional airline seats.
The new layout required redesign of many systems, from the hydraulics system that will now have to deal with
pressure differentials, to the way the service trolley moves on the now tilted cabin floor. The service trolley
will now be hooked to a cable with a counterweight mounted under the cabin floor. This brings a safety improvement
too, because when the Dreamliner hits turbulence, a pulley will automatically move the trolley to a safe position
while the flight attendants head for the nearest seats available. Airlines are exploring the option of mounting the
trolley on rails, so that the passengers could call it and serve themselves even during turbulence.
Ironically, the new layout will require the installation of handrails in the cabin, which will make the Dreamliner
cabin look a bit like commuter buses which are dreaded by most frequent flyers.
(Source (http://tinyurl.com/395w9a))
