Regan Brown
The Boeing 747, also known as the Queen of the Skies, is a highly recognisable aircraft with a long range and high passenger capacity. The amount of fuel burned by a 747 depends on several factors, including the aircraft model, engine manufacturer, take-off location, weather conditions, aircraft load, and cruise altitude. Generally, a 747 burns approximately 1 gallon (about 4 litres) of fuel every second, or about 10 to 11 tonnes of fuel per hour when cruising. On a 10-hour flight, a 747 might burn 36,000 gallons (150,000 litres) of fuel, with a fuel capacity ranging from 48,400 to 63,034 gallons. Takeoff is the most fuel-intensive part of the flight, with the aircraft burning up to 5,000 gallons of fuel during the process.
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What You'll Learn
Fuel burn rate depends on aircraft load, take-off location, weather, and engine manufacturer
The fuel burn rate of an aircraft depends on various factors, including the aircraft load, take-off location, weather conditions, and engine manufacturer.
Aircraft load refers to the weight of the aircraft, including cargo, passengers, and fuel. A heavier aircraft requires more fuel to generate lift and overcome drag, leading to a higher fuel burn rate. Additionally, the configuration of the payload and the design of the aircraft can impact fuel efficiency. For example, a wide-body aircraft like the A330 is generally more fuel-efficient for long-range flights due to its ability to carry more fuel and optimize cruise operations. On the other hand, narrow-body aircraft are typically more efficient for shorter routes as they have better takeoff and landing fuel efficiency.
Take-off location and weather conditions also play a role in fuel burn rates. During takeoff, aircraft engines operate at high power settings, consuming more fuel. The climate and altitude of the departure airport can influence fuel efficiency. For instance, in hot weather, the engine cooling fan operates more frequently, reducing fuel efficiency by up to 12%. Similarly, rain, snow, or slush can increase rolling resistance, leading to higher fuel consumption.
The engine manufacturer and specific engine model can significantly impact fuel burn rates. Newer aircraft engines are often more fuel-efficient due to advancements in technology. For example, the Boeing 787 Dreamliner is 20% more fuel-efficient than previous-generation aircraft due to improvements in engine design and the use of lightweight composite materials. Additionally, the number of engines and their configuration can also impact fuel burn rates, with some aircraft types being more efficient than others.
Other factors that contribute to fuel burn rates include the operator's technique, aircraft maintenance, and routing. Aggressive operation of the aircraft, such as rapid loading cycles, can increase fuel consumption. Proper maintenance practices and optimized routing can help improve fuel efficiency and reduce overall fuel burn.
To provide a specific example, let's consider the Boeing 747. This aircraft burns approximately 5 gallons of fuel per mile or about 1 gallon per second. Over a 10-hour flight, it may burn up to 36,000 gallons of fuel. However, when considering the number of passengers, the fuel efficiency improves significantly. With a capacity of up to 568 passengers, the fuel burn rate per person is much lower, resulting in a more favorable fuel efficiency rating.
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A 747 burns 3,600 gallons of fuel per hour
A Boeing 747 burns approximately 3,600 gallons of fuel per hour, or about 1 gallon (around 4 litres) of fuel every second. Over a 10-hour flight, this amounts to 36,000 gallons (150,000 litres) of fuel burned. The 747 burns approximately 5 gallons of fuel per mile (or 12 litres of fuel per kilometre).
While this may seem like a poor miles-per-gallon rating, it's important to consider the number of passengers a 747 can carry—up to 568 people. When calculated per person, the plane achieves 100 miles per gallon (42 kilometres per litre) per passenger. This calculation demonstrates a more favourable fuel efficiency when considering the number of individuals transported.
The fuel efficiency of aircraft has improved significantly over time. Jet airliners, for instance, became 70% more fuel-efficient between 1967 and 2007, with a 40% improvement in engine efficiency and a 30% improvement from airframes. Additionally, newer aircraft, such as the Boeing 787 Dreamliner, Airbus A350, and Bombardier CSeries, are 20% more fuel-efficient per passenger kilometre than previous generations.
The fuel economy of an aircraft is influenced by various factors, including the aircraft and engine model, seating configuration, passenger load factor, and air cargo. For instance, in 2017, Norwegian Air Shuttle had the highest fuel efficiency among transatlantic airlines, thanks to its fuel-efficient Boeing 787-8 and high passenger load factor. On the other hand, British Airways was the least efficient due to the use of less fuel-efficient Boeing 747-400s and a lower passenger density.
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Jet fuel costs: £18,500 from London to New York
The fuel efficiency of an aircraft depends on the aircraft and engine model, as well as the airline's efficiency in terms of seating configuration, passenger load factor, and air cargo. The Boeing 747, for example, burns approximately 5 gallons of fuel per mile (or 12 litres of fuel per kilometre). That's about 36,000 gallons or 150,000 litres for a 10-hour flight.
However, when you consider the number of passengers, the fuel efficiency per person improves significantly. A 747 can carry up to 568 people, so for every mile, each person only accounts for 0.01 gallons of fuel burned, resulting in 100 miles per gallon per person.
Now, let's focus on the London to New York route. A Boeing 747 Jumbo Jet flying this route burns approximately 70,000 kilograms of fuel, which equates to 82,300 litres given jet fuel's specific gravity of approximately 0.85. The cost of this fuel is approximately £53,500, or £118 per person if the plane is carrying 450 passengers.
While this may seem like a high fuel cost, it's important to consider the number of passengers and the efficiency gains made over the years. Jet airliners became 70% more fuel-efficient between 1967 and 2007, with a 45% reduction in average fuel burn from 1968 to 2014. Additionally, new technologies and aircraft designs, such as the Airbus A380 and Boeing 787 Dreamliner, have further improved fuel efficiency, reducing engine fuel consumption and improving aerodynamics.
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A 747 burns 5 gallons of fuel per mile
A Boeing 747 burns approximately 5 gallons of fuel per mile, or about 4 litres of fuel every second. Over a 10-hour flight, this amounts to around 36,000 gallons of fuel burned. While this may seem like a high fuel consumption rate, it's important to consider the number of passengers a 747 can carry, which is up to 568 people. When calculated per person, the fuel efficiency of a 747 improves significantly, achieving 100 miles per gallon per person.
The fuel efficiency of aircraft has improved over time, with new aircraft models being more fuel-efficient than their predecessors. For example, the Airbus A380, which is even larger than the 747, burns an average of 4,600 gallons of fuel per hour. This translates to a 20% increase in per-passenger fuel efficiency compared to the older 747.
The type of fuel used also impacts the overall fuel efficiency of an aircraft. Jet airliners primarily use Jet A or Jet A-1, which are kerosene-based fuels with high flash points, making them safer than gasoline. The use of kerosene-based fuels contributes to the improved fuel efficiency of modern aircraft.
The seating configuration, passenger load factor, and air cargo also play a role in fuel efficiency. Airlines aim to optimize these factors to increase fuel efficiency and reduce costs. For example, Norwegian Air Shuttle was the most fuel-efficient airline in 2017, thanks to its efficient Boeing 787-8 and high passenger load factor.
Overall, while the 747's fuel consumption rate of 5 gallons per mile may seem high, advancements in aircraft technology and fuel efficiency have contributed to more sustainable air travel.
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A 747 burns 5,000 gallons of fuel from takeoff to cruise altitude
A Boeing 747 burns approximately 5,000 gallons of fuel from takeoff to cruise altitude. This large capacity jetliner has four engines that burn roughly 10 to 11 tonnes of fuel per hour during the cruise phase of flight. The 747's fuel efficiency is impressive, burning about 5 gallons of fuel per mile or 0.9 gallons every second while in flight. This equates to around 100 miles per gallon per person when carrying 500 passengers.
The 747's fuel efficiency is further demonstrated when compared to other modes of transport. For example, a typical car achieves 25 miles per gallon, and driving from New York to Los Angeles would consume 112 gallons of gas for a distance of 2,797 miles. In comparison, a 747 flying the same route with 200 passengers would burn approximately 5,325 gallons of jet fuel, resulting in 27 gallons per person.
The fuel economy of aircraft has improved significantly over time. Jet airliners became 70% more fuel-efficient between 1967 and 2007, with a 45% reduction in average fuel burn 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 generations.
Additionally, wingtip devices have played a crucial role in improving fuel efficiency. These devices increase the effective wing aspect ratio, reducing lift-induced drag and improving the lift-to-drag ratio. Airbus has utilized wingtip fences and Sharklet blended-winglets, offering a 3.5% fuel burn reduction on flights over 2,800 km.
The type of fuel used also impacts the 747's fuel efficiency. Jet A and Jet A-1, which are kerosene-based fuels, are commonly used in turbine engine airplanes due to their higher flash point compared to gasoline. Aviation gasoline (AVGAS) is used in small piston-engine airplanes but is less efficient and powerful than kerosene-based fuels.
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Frequently asked questions
A 747 burns approximately 5,000 gallons of fuel during takeoff. This is based on a specific consumption of 0.5 lb of fuel per hour per lb of thrust and a fuel density of 6.50 lb/gal. The actual number will be affected by various factors, including the weight of the aircraft, runway length, altitude, and headwind component.
The four engines of the 747 burn around 10 to 11 tonnes (3,500 gallons) of fuel per hour when cruising at altitude. This equates to roughly 1 gallon (approximately 4 litres) of fuel every second.
It costs around $140,000 to $170,000 to refuel a 747, but the exact price depends on factors such as the fuel market price, the flying route, the aircraft model, fuel type, and taxes.
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