Regan Brown
The Boeing 747, also known as the Queen of the Skies, is a large aircraft with a high fuel capacity, allowing it to cover long distances. Its fuel capacity varies across models, ranging from 48,400 to 63,034 gallons, with an average of around 63,000 gallons. This large capacity enables the plane to carry a significant fuel load, weighing approximately 400,000 pounds, which is nearly equivalent to the weight of the empty plane itself. The 747's fuel efficiency is a topic of debate, with some considering it less efficient than other aircraft, while others highlight its efficiency in terms of maximum load per flight, which can be around 568 people. The plane consumes about 5 gallons of fuel per mile and burns approximately 1 gallon of fuel every second during a flight, resulting in substantial fuel usage for long-duration flights.
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What You'll Learn
A 747 burns 1 gallon of fuel every second
The Boeing 747, also known as the "'Queen of the Skies'", is a large aircraft with a long range and high fuel capacity. It burns approximately 1 gallon of fuel every second, which equates to 3600 gallons per hour or 60 gallons per minute. Over a 10-hour flight, a 747 might burn through 36,000 gallons of fuel.
The 747's fuel efficiency is a topic of interest. On the one hand, it consumes a large amount of fuel, especially when compared to more modern aircraft. For instance, the Airbus A380, the largest passenger aircraft, consumes only slightly more fuel than the 747 despite having a higher passenger capacity. Additionally, the 747 has a low miles-per-gallon rating, burning approximately 5 gallons of fuel per mile.
On the other hand, when considering the number of passengers it can carry, the 747 becomes more fuel-efficient. A fully loaded 747 with 568 passengers burns 0.01 gallons per person per mile, resulting in 100 miles per gallon per person. This is significantly more efficient than a car, which typically gets about 25 miles per gallon.
The 747's fuel efficiency has also improved with newer models. The 747-400, for example, has a 9% increased fuel capacity compared to its predecessors. Furthermore, the introduction of high-bypass turbofan engines in the 747 design allowed for double the power of earlier turbojets while consuming one-third less fuel.
Overall, while the 747 may burn a significant amount of fuel, its efficiency relative to the number of passengers it can carry and the improvements in newer models are notable factors to consider.
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The 747SR has 20% less fuel capacity than the standard 747
The Boeing 747 is a long-range wide-body airliner that was designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023. The 747-100SR is a "short-range" variant of the 747-100, developed in response to requests from Japanese airlines. The 747SR has a 20% lower fuel capacity than the standard 747, but can carry more passengers—up to 498 in early versions and over 550 in later models—due to increased economy class seating. This reduction in fuel capacity allows the 747SR to accommodate the additional stress from a greater number of takeoffs and landings.
The 747SR features structural modifications to withstand a higher cycle-to-flying hour ratio. It has extra structural support at the wings, fuselage, and landing gear. The 747-100BSR, a variant of the 747SR, debuted in 1978 and was powered by JT9D-7A or General Electric CF6-45 engines. This variant had a maximum takeoff weight (MTOW) of 600,000 pounds (270 tonnes).
The standard 747-100B model, which the 747SR is based on, has a fuel capacity of 48,070 US gallons (182,000 litres). This allows for a range of 5,000 nautical miles (9,300 kilometres or 5,800 miles) with a typical 452-passenger payload. The 747-200B, an improved version of the 747-200, also has increased fuel capacity and more powerful engines. It entered service in February 1971 and has a full-load range of about 6,857 nautical miles (12,700 kilometres).
The 747-300, which entered commercial service in 1983, was the first to introduce significant changes to the 747 Classics. These changes included an extended upper deck, improved engines with reduced fuel burn, and a 10% increase in passenger capacity. Overall, the 747SR's reduced fuel capacity enables it to cater to high-frequency domestic flights within Japan, while the standard 747 is designed for longer-range international operations.
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A 747 can carry 48,400 to 63,000 gallons of fuel
The Boeing 747 is a large aircraft with a long range and high capacity. It is an ideal choice for long routes and has a large fuel capacity to cover such distances. The 747's fuel capacity varies among models and configurations, with the earliest models holding less fuel than their successors.
The first 747, the 747-100, which launched in 1969, holds 48,400 gallons of jet fuel. The next two versions, the 747-200 and 300, featured a higher maximum takeoff weight (MTOW) and an increased fuel capacity of 52,410 gallons.
Later models of the 747 benefited from further developments in aviation technology, with the 747-400 becoming a popular choice among airlines thanks to its 9% increased fuel capacity compared to its predecessors (57,285 gallons). The 747-400 burns approximately 5 gallons of fuel per mile and can carry up to 568 passengers. At maximum seat capacity, its fuel consumption is 0.01 gallons per passenger per mile.
The 747's fuel efficiency has been a topic of discussion, with some noting that it burns about one gallon of fuel every second during flight. This equates to 18,000 gallons of fuel burned during a 5-hour flight. However, when considering the number of passengers it can carry, the 747 becomes more fuel-efficient per person than a car.
The 747's fuel capacity can range from 48,400 to 63,000 gallons, with most sources placing it at around 63,000 gallons. This weighs approximately 400,000 lbs, nearly as much as the empty plane itself.
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A 10-hour flight may burn 36,000 gallons of fuel
A 10-hour flight on a Boeing 747 may burn 36,000 gallons of fuel. This is because a 747 burns approximately 1 gallon of fuel per second or 5 gallons of fuel per mile. The amount of fuel burned will depend on the plane's speed and the number of passengers on board. For example, if the plane is flying at 550 mph with 500 passengers, it is getting 100 miles per gallon per person.
The fuel economy of an aircraft is a measure of its transport energy efficiency. Fuel efficiency can be increased by improving aerodynamics, reducing weight, and improving engine brake-specific fuel consumption and propulsive efficiency or thrust-specific fuel consumption. Endurance and range can be maximised by flying at an optimum airspeed and altitude. For example, economy is typically better at higher altitudes. An airline's efficiency depends on its fleet fuel burn, seating density, air cargo, and passenger load factor, while operational procedures like maintenance and routing can also save fuel.
Over time, aircraft have become more fuel-efficient. Jet airliners became 70% more fuel-efficient between 1967 and 2007, with average fuel burn falling by 45% from 1968 to 2014. Newer aircraft, such as the Boeing 787 Dreamliner, Airbus A350, and Bombardier CSeries, are 20% more fuel-efficient per passenger kilometre than previous-generation aircraft.
The amount of fuel burned on a flight will also depend on the type of aircraft. For example, a Boeing 747-400 may use 10-11 tons of fuel per hour, while a Boeing 737-800 uses about 2.5-3 tons of fuel per hour. The Airbus A380, the world's largest jet airliner, burns an average of 11,000-12,000 litres of fuel per hour.
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A 747-400 burns 10-11 tons of jet fuel per hour
The Boeing 747-400 is a large jet airliner with four engines. It is an extremely fuel-inefficient aircraft, burning approximately 10 to 11 tons of jet fuel per hour while cruising. To put that into perspective, this equates to roughly 1 gallon (approximately 4 litres) of fuel every second. Over a 10-hour flight, a 747-400 might burn 36,000 gallons (150,000 litres) of fuel.
The fuel efficiency of the 747-400 can be better understood when compared to other aircraft. The Airbus A380, for example, is a similar multi-story jumbo jet that can carry over 800 passengers. The A380 burns an average of 4,600 gallons (11,400 litres) of fuel per hour, which is a bit more fuel-efficient than the 747-400. When considering the number of passengers, the A380 achieves a 20% increase in per-passenger fuel efficiency over the 747-400.
The fuel efficiency of the 747-400 can also be compared to that of a typical car. A car with an average occupancy of two passengers achieves 56 gallons of fuel per person when travelling from New York City to Los Angeles, a distance of 2,797 miles. In contrast, the 747-400 can carry 500 passengers and achieves 0.01 gallons per person per mile, resulting in 100 miles per gallon per person.
The fuel consumption of the 747-400 also varies depending on the flight duration and route. For example, a 747-400 flying from London to New York burns approximately 70,000 kilograms of fuel, which equates to 82,353 litres or £18,500 based on the UK fuel price of 31 pence per litre.
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