Rajan Wilcox
The Boeing 777 is a long-range wide-body airliner that first entered service in February 1997 with British Airways. The aircraft has undergone several design changes over the years, with different variants being introduced, including the 777-200, 777-200ER, 777-200LR, and 777F. The fuel capacity of the 777 varies depending on the variant, with the 777-200 having a fuel capacity of 117,350 litres, while the 777-200LR can carry up to 47,890 US gallons (181,300 litres) of fuel, allowing it to operate ultra-long-distance routes. The fuel capacity of the 777 has been a key factor in its design and development, with Boeing aiming to increase the range and efficiency of the aircraft.
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What You'll Learn
- The Boeing 777-200LR can carry up to 47,890 US gallons of fuel
- The 777-200ER has an increased MTOW and fuel capacity for transoceanic routes
- The 777-300ER received enhancements for reduced drag and weight
- The 777-200LR set a world record for a non-stop commercial flight
- The 777-200 has a fuel capacity of 117,350 litres
The Boeing 777-200LR can carry up to 47,890 US gallons of fuel
The Boeing 777 is a wide-body airliner with a long range. The 777-200LR (long-range) Worldliner is an ultra-long-range version, designed to be the longest-range aircraft in the world. The aircraft first flew in October 1996 and entered service in February 1997 with British Airways. The 777-200LR can carry up to 47,890 US gallons (181,300 L) of fuel. This capacity allows the 777-200LR to operate ultra-long-distance, trans-polar routes such as Toronto to Hong Kong.
The 777-200LR Worldliner set a world distance record for a commercial aircraft non-stop flight in November 2005, flying 21,601 km (11,664 nm) from Hong Kong to London Heathrow. The aircraft has additional fuel tanks in the rear cargo hold, bringing its total fuel capacity to 195,285 L. The main fuel tanks are installed in the wing torsion box, with reserve and surge tanks on the inboard side of the wing.
The wings on the 777 are designed with increased thickness and a longer span than previous airliners, resulting in greater payload and range, improved takeoff performance, and a higher cruising altitude. The wings also serve as fuel storage, with longer-range models able to carry more fuel. The 777-200LR's range is 17,446 km, and it can carry 301 passengers.
The production freighter model, the 777F, was rolled out in May 2005 and used the structural design and engine specifications of the 200LR, along with fuel tanks derived from the 300ER. The 777F can carry a revenue payload of 103,000 lb (46,720 kg) up to 9,195 km.
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The 777-200ER has an increased MTOW and fuel capacity for transoceanic routes
The Boeing 777 is a long-range wide-body airliner with a fuel capacity of up to 47,890 US gallons (181,300 L). The aircraft was first introduced in the late 1990s with the 777-200 model, primarily aimed at US domestic airlines. Over time, Boeing introduced longer-range variants, including the 777-200LR Worldliner, which broke a world distance record for commercial aircraft with a non-stop flight from Hong Kong to London Heathrow.
The 777-200ER ("ER" for Extended Range), originally known as the 777-200IGW (increased gross weight), is a variant of the 777-200 with additional fuel capacity and an increased maximum takeoff weight (MTOW), enabling transoceanic routes. The 777-200ER features a centre section tank that increases its fuel capacity to 171,175 litres, compared to the 777-200's capacity of 117,350 litres.
The 777-200ER's increased fuel capacity and MTOW allow it to operate on longer routes, such as transoceanic flights. This extended range capability is further enhanced by the aircraft's efficient design, including its supercritical airfoil wings, which are optimised for cruising at Mach 0.83 (and revised after flight tests up to Mach 0.84). The wings are designed with increased thickness and a longer span than previous airliners, resulting in greater payload and range, improved takeoff performance, and a higher cruising altitude.
The 777-200ER's increased MTOW also contributes to its ability to carry more fuel and fly longer routes. The aircraft's powerful GE90-115B engine, rated at 511kN (115,000 lb), provides the necessary thrust to handle the increased weight during takeoff and cruising. Additionally, the 777-200ER may benefit from other improvements introduced in later variants, such as raked wingtip extensions that enhance fuel efficiency and reduce takeoff field length and climb performance.
Overall, the 777-200ER's combination of increased fuel capacity, efficient design, and higher MTOW enables it to operate on transoceanic routes, providing airlines with the flexibility to serve longer-haul destinations.
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The 777-300ER received enhancements for reduced drag and weight
The Boeing 777 is a large commercial airliner with different variants, including the 777-300ER, which is an extended-range version. The 777 can carry up to 47,890 US gallons (181,300 L) of fuel in its wings, which also serve as fuel storage. This capacity enables the 777 to operate ultra-long-distance routes.
The 777-300ER received enhancements to reduce drag and weight, addressing the four fundamental principles of aircraft design and flight: lift, weight, thrust, and drag. Lift counteracts weight, allowing the aircraft to ascend, while thrust opposes drag, propelling the aircraft forward. Therefore, balancing these forces is critical for stable flight and efficient aircraft design.
To reduce weight, the 777-300ER features a unique main landing gear with six wheels on each strut, reducing the need for an additional centerline gear. This design also simplifies the braking and hydraulic systems. Each tire can carry a load of 59,490 lb (26,980 kg), which is heavier than other wide-body aircraft.
To reduce drag, the 777-300ER features raked wingtips, a strengthened fuselage, and modified main landing gear. The raked wingtips are extended and elongated, distinguishing the 777-300ER from earlier models. The fuselage is also strengthened, and the wings are modified to improve takeoff performance and cruising altitude.
In 2010, the 777-300ER received an engine and aerodynamics improvement package, increasing the maximum zero-fuel weight by 5,000 lb (2,300 kg) and enhancing the thrust of its GE90-115B1 engines by 1-2.5%. These improvements allowed for a higher payload and improved takeoff performance at higher-altitude airports.
Additionally, in 2015, further details of the improvement package were unveiled, including replacing the fuselage crown with tie rods and composite integration panels, resulting in an 1,800 lb (820 kg) weight reduction. New flight control software was also introduced, eliminating the need for a tail skid. Boeing also redesigned the inboard flap fairings to reduce drag by lowering pressure on the underside of the wing. These changes aimed to increase fuel efficiency and allow for additional seats, improving per-seat fuel efficiency.
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The 777-200LR set a world record for a non-stop commercial flight
The Boeing 777 is a large, long-range, wide-body airliner. The 777-200LR (Longer Range) variant of the aircraft set a world record for the longest non-stop commercial flight by a jetliner. On November 9, 2005, the 777-200LR flew 11,664 nautical miles (21,601 km) in 22 hours and 42 minutes from Hong Kong to London Heathrow Airport. This distance is over halfway around the world and farther than any previous commercial jetliner had flown. The aircraft was crewed by eight pilots and carried 27 passengers.
The 777-200LR is capable of carrying up to 301 passengers and their baggage. The aircraft can fly up to 9,420 nautical miles (17,445 km) when fitted with three optional fuel tanks in the cargo area. The 777-200LR is powered by two General Electric GE90-115Bs, the world's most powerful jet engines. The aircraft's wings also contribute to its long-range capabilities, with a supercritical airfoil design that is swept back at 31.6 degrees and optimized for cruising at Mach 0.83. The wings are longer and thicker than those of previous airliners, providing greater fuel storage capacity and resulting in greater payload and range.
The 777-200LR's record-breaking flight exceeded two notable previous distance records. The first was a 747-400 that flew 9,200 nautical miles (17,039 km) non-stop from London to Sydney in 1989. The second was a 777-200ER (Extended Range) that flew 10,823 nautical miles (20,044 km) from Seattle to Kuala Lumpur in 1997, setting a speed and distance record for its weight category.
The 777-200LR's ability to operate ultra-long-distance routes has been a significant advantage for airlines, allowing them to offer non-stop flights between distant city pairs and reducing the number of stops required for passengers' travels. This capability has contributed to the 777-200LR's market leadership and helped build brand image and loyalty among flyers. The aircraft has been operated by various airlines, including Qatar Airways, British Airways, United Airlines, Emirates, China Airlines, Cathay Pacific, and Singapore Airlines.
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The 777-200 has a fuel capacity of 117,350 litres
The Boeing 777 is a wide-body airliner that first entered service in February 1997 with British Airways. The 777-200 variant, aimed at US domestic airlines, has a fuel capacity of 117,350 litres. This is due to the main fuel tanks being installed in the wing torsion box, with reserve and surge tanks on the inboard side of the wing. The wings on the 777 are designed with increased thickness and a longer span than previous airliners, resulting in greater payload and range, improved takeoff performance, and a higher cruising altitude.
The 777-200 is no longer marketed by Boeing, having been removed from the manufacturer's price listings for 777 variants as of 2019. However, during its production run, the 777-200 competed with the Airbus A330-300. The B-market 777-200ER ("ER" for Extended Range) is a variant of the 777-200 that offers additional fuel capacity and an increased MTOW, enabling transoceanic routes.
The 777-200LR (long-range) Worldliner is an ultra-long-range version of the 777-200, designed to be the longest-range aircraft in the world. This variant features additional fuel tanks in the rear cargo hold, increasing the total fuel capacity to 195,285 litres. In November 2005, the 777-200LR Worldliner set a world distance record for a commercial aircraft non-stop flight, travelling 21,601 km (11,664 nm) from Hong Kong to London Heathrow.
The production freighter model, the 777F, is based on the structural design and engine specifications of the 777-200LR. It rolled out in May 2008 and received FAA and EASA type certification in February 2009. The 777 has faced competition from Airbus' A350 XWB and Boeing's proposed 787 series, both of which offer improved fuel efficiency.
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Frequently asked questions
The fuel capacity of the 777-200 is 117,350 litres. The 777-200ER and 777-300 have a centre section tank that increases the fuel capacity to 171,175 litres. The 777-200LR has additional fuel tanks in the rear cargo hold, bringing the total fuel capacity to 195,285 litres, or 47,890 US gallons.
The 777-200LR has a range of 17,446 km, and can cover ultra-long-distance routes such as Toronto to Hong Kong. In 2005, a 777-200LR set a world distance record for a commercial aircraft non-stop flight, flying 21,601 km from Hong Kong to London Heathrow.
The 777-200LR can carry 301 passengers.
