The Boeing 777X will be using a higher proportion of composite materials in construction than
the current model, in line with improvements in technology. The wing of the Boeing 777X
will be remarkably different from any found on a current commercial aircraft. One of the
biggest changes to the 777X is the use of GE9X engines.
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777X The New Twin-Engine Jumbo Coming Soon.” So without any further ado, Let's begin.
Boeing has come up with a way to compromise
between giving the aircraft a larger wingspan and thereby improving lift with the resultant
saving in fuel, whilst at the same time not impacting upon the aircraft’s ability to
use standard width gates at airports. The Boeing 777-8X has range capabilities that
are slightly better than that of the Boeing 777-200LR and can carry about as many passengers
as the Boeing 777-300ER and should compete with the Airbus A350-1000.
The company said the Boeing 777X combines
design elements from the twin-aisle 777 with "advanced technologies" from the 787 Dreamliner,
making it "the largest and most fuel-efficient twin-engine jet in the world." The aircraft
can carry up to 426 passengers and is set to compete with the A350-1000 recently introduced
by European rival Airbus. The aforementioned changes result in lower engine weight. Additionally,
the engine operates under higher pressure-ratio conditions.
The 777X with folding wingtips will come in
two variants, the 777-8 and the 777-9, as well as a cargo version to soon be made official.
Boeing also says that the newest version of planes can save 20% on fuel, reducing the
carbon emissions which contribute to global warming. The 777X, painted in the colors of
the Middle Eastern airlines, is anticipated to arrive in Australia within the next few
years. Etihad has ordered 25, Emirates has 115 and
Qatar 60, Singapore Airlines has 60, and Cathay Pacific has 25. Middle Eastern and Asian airlines
have placed most of the 777X’s orders. British Airways and Lufthansa’s only customers in
Europe, with US airlines waiting in the wings. A delay for the first deliveries of its new
wide-body 777X plane is costing the company $6.5 billion.
"Boeing has shifted the certification to July
2023 and we had a contracted delivery position for June 2020," Emirates' president Tim Clark
told reporters at the five-day event. "It's anybody's guess as to whether or not they
will achieve that."The delay has cost Emirates millions of dollars as they upgrade old aircraft
to retain them longer. "To restore our network, we need all our aircraft and we cannot allow
manufacturers to slow us down," Clark said.
While Al7055 has a density of 2.86 kg per cubic decimeter, CFRP has a density of 1.7
- 1.95 kg per cubic decimeter. This means that a wing made out of CFRP instead of aluminum
is 31.81% - 40.6% lighter. Additionally, the span will increase from 64.8 m (Boeing 777-300ER)
to 71.1 m, it is estimated that this will result in a wing area that is 10% larger than
that of the Boeing 777-300ER (427.8 m2).
This brings the wing area of the 777X to 470.58 m2. The aspect ratio of the 777-300ER is 9.815,
while the 777X has an aspect ratio of 10.74. By increasing the aspect ratio the lift-induced
drag coefficient possibly has been reduced by 11%. Conversely, on landing, the aircraft
will raise the tips as it leaves the runway so that obstructions on either side of the
taxiway are not struck and of course, the aircraft can fit into the terminal gate area.
The body of the aircraft will be built of advanced aluminum-lithium alloy.
The Boeing 777X will import a number of the
flight deck and flight control systems from the Boeing 787 Dreamliner. The 38.3cm flight
deck display will be similar to that of the 787. The cabin of the 777X will be spacious
with larger windows, new lighting, and new architecture.
"The 777X is a new airplane and a new production
system," said Josh Binder, vice president, and general manager of the 777X. "The 777-8X
will accommodate 350 to 375 people, while the 777-9X will have 400 to 425 seats. The
777X is being hailed as a replacement for the 747, a plane that has been adored for
decades. When the 777X was first planned, Qantas was supposed to be an early client;
however, the airline chose Airbus A380s and Dreamliner planes instead.
Qantas’ new order would push Boeing’s
777X to the back of the line, as the plane has been hampered by delays and is not expected
to enter commercial service until 2023 at the earliest. The 777X will introduce a number
of passenger experience improvements, including higher and larger 162 square inch windows.
By comparison, the windows on the existing Boeing 777 are 140 square inches and the windows
on the Airbus A350 are 125 square inches.
While still in its testing phase, the world's largest passenger jet flew for the first time
outside the United States at a major air show in the United Arab Emirates (UAE). The blue
and white twin-engine aircraft took to the sky, demonstrating sharp turns and rapid ascents
at the Dubai Airshow, the industry's first large gathering since COVID-19 clipped its
wings.
It is no coincidence that its first international flight was to Dubai, home to aviation giant
Emirates which has ordered 115 of the aircraft. It will have a range of 8,200nm (15,185km)
and a maximum take-off weight of 344t. The 777-8X has a range of up to 9,300nm (17,220km)
and a maximum take-off weight of 315t. Boeing decided not to design a fuselage made out
of CFRP to reduce the development costs.
If Boeing would have decided to make a fuselage out of composite the operational empty weight
of the Boeing 777X would have been reduced even further, enabling the plane to fly even
further or carry more passengers (or a combination of both) or size down the wings and engines.
But a redesign of the fuselage would be equivalent to designing a complete aircraft, making a
service entry in 2020 almost unreachable.
The aircraft's entry into the market at the end of 2023 would come at a time when the
industry is expected to have overcome its COVID-induced slowdown. "We're starting to
get into what we sometimes refer in the industry as a replacement wave, a lot of large wide-body
aircraft are going to begin to retire and we'll continue to see growth in the number
of retirements well into the 2030s," Boeing said.
Global air traffic has started to bounce back
from the worst of its pandemic decline, though in October it was still around half the level
before the global health crisis idled aircraft. But according to the International Air Transport
Association, global traffic is expected to double by 2050 from its pre-pandemic levels,
with Boeing saying they expect approximately 7,700 new wide-body aircraft will be needed
by 2040.
Boeing’s 777-8, the longer-range member of Boeing’s 777X family, might be a contender
for Project Sunrise. The 777-8’s normal version has a range of 16,170 kilometers,
which is insufficient for a nonstop journey from Sydney to New York, let alone Sydney
to London. With Airbus’s A350-900 Ultra Long-Range aircraft, Singapore Airlines could
fly nonstop from Singapore to New York City without refueling.
Looking at the current 777 family, it can
be seen that only the 777-300ER has a significant amount of unfilled orders. Taking into account
that Boeing has a backlog of 5100 airplanes valued at $374 billion, it can be said that
the contribution of the Boeing 777X to the order book is significant.
In the coming years, this number will grow even further as airlines will replace their
777/747 and start ordering airplanes to grow the fleet.
"We're sitting at about 600 flight tests or
1,700 hours, its performance is coming out very well," Boeing's senior vice president
of commercial sales and marketing, Ihssane Mounir, said before the air show. "We tend
to see a three-stage recovery, with the wide-body demand being the last to come back, returning
in approximately 2024," said Boeing's director of product marketing, Tom Sanderson, during
a virtual briefing before the air show.
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