Boeing 777 Motor

1991-09-01

Cops and donuts slot machine app. In 2011, Boeing started plans for improved versions of the 777-200ER and the 777-300ER. The 777X will enter service with 2 variants — the 777-8 and the 777-9. The -8 will be slightly longer than the -200ER and be able to carry 353 passengers 9,480 miles.

The electric power system chosen for the Boeing 777 is an example of the advances seen in response to market demands for superior performance and reliability. The main electric system includes two engine-driven integrated drive generators, a generator driven by the auxiliary power unit, three generator control units, and a bus power control unit. A backup electric system independent of the main system provides the redundancy of electrical sources equivalent to a three-engine airplane, considering the auxiliary power unit inoperative. Both systems are automated to minimize crew workload.

The new Boeing 777X will be the world’s largest and most efficient twin-engine jet, unmatched in every aspect of performance. With new breakthroughs in aerodynamics and engines, the 777X will deliver 10 percent lower fuel use and emissions and 10 percent lower operating costs than the competition. Boeing is set to debut its biggest plane ever next month, and the 777X has finally been paired with the gargantuan GE9X engine that will propel its flight. The plane is currently housed in Boeing's. Our Boeing 777-200ER aircraft offers a variety of signature products and experiences unlike anything else in the sky. Visit delta.com to learn more. Boeing 777-200ER Aircraft Seat Maps, Specs & Amenities: Delta Air Lines. With a cruise TSFC value of 0.520 for the 777's GE90-85B $^2$, the thrust can be anywhere between 18,300 and 8,600 lbf, per engine. Likewise for takeoff thrust, a lightly loaded 777 on a long runway and no obstacles will use a lower takeoff thrust than on a short runway with an obstacle to clear, so 45°F is not really the only variable.

The highly automated features of the 777 aircraft are enhanced by the equally sophisticated control units of the electrical power system. The state-of-the-art, microprocessor-based control units use a high-level software language to provide control and protection for the system, along with an elaborate built-in-test (BIT) capability.

Each control unit has two-way communication through a newly developed ARINC 629 communication bus. In addition to providing monitoring and built-in test information to the central aircraft information management system (AIMS) computer, an automatic checklist in each unit reports the real-time status of all main ac electrical power system control switches across the ARINC 629 communication bus for display in the flight deck.

DOI: https://doi.org/10.4271/912050

Boeing 777 Motor Carrier

Citation: Burns, J. and Tenning, C., 'Electric Power Generating System for the Boeing 777 Airplane,' SAE Technical Paper 912050, 1991, https://doi.org/10.4271/912050.
Download Citation

Pages: 12

Event: International Pacific Air & Space Technolgy Conference

e-ISSN: 2688-3627

Also in: International Pacific Air and Space Technology Conference and 29th Aircraft Symposium Proceedings-P-246

Related Topics:

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

We also recommend: TECHNICAL PAPER

Automatic Electric Load Management Centers

901804

TECHNICAL PAPER

Uninterruptible/Rapid Power Transfer for Critical AC Buses

2004-01-3157

Boeing 777 Motor Price

TECHNICAL PAPER

The Use of High Voltage Direct Current in Aircraft Electrical Systems - A Navy Perspective

Bingo sites with a $/€/£20 no deposit bonus. This is quite standard and will give you a nice chunk of change to game with. You can play, and hopefully win, with this kind of money, and then you can choose to cash out, or you can carry them forward to continue enjoying the site. Bingo sites with a $/€/£ 15 bingo No Deposit bonus. No deposit bonus. No download required. ECOGRA certification. Nodeposit.org choice. Hundreds of bonuses on the best bingo games. This is the list that you need to find the best online bingo.

912173

A recent 777-300ER delivery to Cathay Pacific Airways marks a major milestone between GE Aviation and Boeing Commercial Airplanes. The airplane is powered by the 2000th GE90 engine to Boeing for the 777.

Boeing 777 Motor Jet

“The GE90 engine along with the Boeing 777 aircraft helped revolutionize the twin-engine aircraft concept in commercial aviation,” said Bill Millhaem, general manager of the GE90/GE9X Program at GE Aviation. “Prior to its introduction, twin-engine airplanes were not viewed as a viable option for long-haul travel. Yet the proven performance and reliability of the GE90-powered Boeing 777 aircraft altered this mindset and made the engine-aircraft combination among the most successful long-range, wide body offering in service today.”

Close to 70 operators utilize GE90-powered Boeing 777 airplanes, with the 2000th engine powering a Boeing 777-300ER. More than 500 GE90 engines are on the order book, which continues to increase. “The customers love the airplane. It’s moneymaker for them. Which is most important thing-- that our customers make money and they like the airplane,” said Jim Petersen, senior chief engineer of Propulsion for Boeing Commercial Airplanes.

The GE90 engine family powers the Boeing all 777 models and is the exclusive powerplant on the 777-300ER, -200LR, and Freighter airplanes. Of the 2000 GE90 engines delivered to date, more than 400 were the earlier GE90-94B model and almost 1600 were the GE90-115B engine, which is the world’s most powerful jet engine. The family has accumulated more than 45 million flight hours and 7 million cycles since entering service in 1995.

The GE90 engine features several technology firsts, including carbon fiber composite front fan blades, the world’s largest front fan at 128 inches in diameter and the world-record setting thrust of 127,900 pounds during certification testing. The popular GE90-115B engine includes such performance-enhancing features as three-dimensional aerodynamic (3-D aero) compressor and wide-chord, swept composite fan blades for greater efficiency. The dual annular combustor emits no more than 40 percent of the hydrocarbons allowed by today's international standards. In addition, today's GE90-115B engines have been enhanced to reduce fuel burn by 3.6 percent from the 2000 launch specifications.

Boeing 777 Engine Fire

The GE90 engine provides the foundation for the new GE9X engine that will power the Boeing 777X. The GE9X engine will be in the 100,000 pound thrust class and features a 134-inch diameter composite fan case and 16 composite fan blades; a next-generation 27:1 pressure-ratio 11-stage high-pressure compressor; a third-generation TAPS III combustor for high efficiency and low emissions; and CMC material in the combustor and turbine. Almost 700 GE9X engines have been ordered by customers since it was launched last year. Technology maturation testing on key components for the GE9X will continue this year with the first engine scheduled to test in 2016.