Titanium can withstand comparable loads better than aluminum, has minimal fatigue concerns, and is highly resistant to corrosion. Titanium use has been expanded on the 787 to roughly 14 percent of the total airframe.
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Titanium has been replacing aluminum parts in aircraft manufacturing because of its ability to resist heat and corrosion when it comes in contact with carbon-fiber reinforced polymers (CFRPs). Titanium is now used in the fastening elements, airframe and landing gear of airplanes.
The 787 Dreamliner offers a number of operational benefits due to the airframe comprising approximately half (by weight) carbon fiber reinforced plastic and other composites. As airlines add the 787 to their fleets, they are increasingly interested in repair methods for the airplane's composite structure.
This high aspect ratio wing design combined with efficiency enhancing raked wing tips allow the 787 to be one of the fastest commercial aircraft (Mach 0.85 cruise speed) while consuming less fuel than today's comparably sized aircraft.
The Boeing 787 aircraft is 80% composite by volume. By weight, the material contents is 50% composite, 20% aluminum, 15% titanium, 10% steel, and 5% other [11].
The 787's latest problem mirrors production issues discovered over 2020 and 2021 that included improperly fitted shimming that led to paper-thin gaps between surfaces on the Dreamliner's fuselage.
The Air InsideThe cabin pressure on the 787 is higher and the humidity higher than other airplanes. Basically, passengers on board will feel like they are at an altitude of 6,000 feet, 2,000 feet lower than a standard flight.
The Boeing 787 Dreamliner has revolutionized flying for both passengers and pilots. Taking a leap into the future from its predecessors, the designers incorporated a number of new features that make the Dreamliner one of the most fuel efficient and comfortable aircraft in the skies.
The thin plastic skin on Boeing's 787 Dreamliner is an engineering marvel, a mix of carbon fibers and epoxy molded into large barrel-shaped sections that are then baked at up to 350 degrees in giant ovens.
The A350-900 has a 665 nautical mile advantage in range, while the 787-9 has a lighter maximum take-off weight by 62,408 pounds. The A350-900 offers more seating in a typical configuration, which we would expect to result in a lower seat-mile cost.
The Boeing 787 8 Dreamliner is a mid-size, twin-engine, wide-body jet developed by the Boeing company. The decision to develop such a plane was brought about by the need for a replacement for the aging Boeing 767 which was experiencing falling sales, due to stiff competition from the Airbus A330-200.
Disadvantages of TitaniumIt is not suited in high-temperature ranges, above 400 degrees Celsius, where it begins to lose its strength and nickel-based superalloys, are better equipped to handle the conditions.
The seats are so cramped in economy that the legroom of a similar seat on a 777 or a 747 feels like a business-class seat. Intelligent engineering allows for seat-backs to recline but to compensate, the seat bottom lunges forward — thereby only providing an illusion of a recline.
As Boeing examined its 787 production, certain defects came into focus: improperly sized shims that fill tiny gaps between sections of the airplane body, known as the fuselage, and variations on skin flatness in certain sections of the interior of the fuselage.
Jun. 28—After debuting in 2011, Boeing Co.'s 787 Dreamliner has become popular among the world's airlines. But heightened scrutiny both inside and outside the company in recent years has revealed a number of production flaws and largely prevented it from delivering new Dreamliner jets for nearly two years.
The issue pertains to wrinkling in the forward pressure bulkhead in the jets' noses, the person said, asking not to be identified because the details are private. The defect isn't considered a threat to flight safety, the person said.
We have suspended purchasing titanium from Russia. Our inventory and diversity of titanium sources provide sufficient supply for airplane production, Boeing said in an emailed statement.