Katerina Swanson
The Boeing 737 is a popular commercial jet airliner with a wide range of variants. The fuel consumption of a 737 depends on the model and flight conditions, with estimates ranging from 746.27 gallons per hour to 850 gallons per hour. For example, the 737-800 burns 850 gallons of jet fuel per hour, while shorter flights using this model consume about 2.5-3 tons (5,500-6,600 pounds) per hour. The 737 Classic series, which includes the -300, -400, and -500 variants, offered improved fuel efficiency over the earlier 737-100 and 737-200 models. The latest generation, the 737 MAX, features upgraded engines that further enhance fuel efficiency.
| Characteristics | Values |
|---|---|
| Fuel consumption per hour | 746.27 gallons or 5,000 pounds |
| Fuel consumption per minute | 12.44 gallons |
| Fuel flow per engine | 1231 kg/h |
| Fuel consumption for a 1000 NM trip with 162 passengers | 96 mpg per passenger or 0.593 mpg for the whole plane |
| Fuel consumption for a transatlantic flight from New York to London | 36,000 gallons or 136,275 liters |
| Fuel capacity of 737-200 Advanced | 15% increase compared to original -200s and -100s |
| Fuel efficiency of CFM56-3 engine compared to P&W engines | 25% increase |
| Fuel efficiency of CFM56-3B-1 engine compared to original Pratt & Whitney engines | Significant gains |
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What You'll Learn
Fuel usage varies by model and flight conditions
The first generation 737-100/200 variants were powered by Pratt & Whitney JT8D low-bypass turbofan engines. The 737-200 Advanced, an improved version of the -200, offered a 15% increase in payload and range over the original -200s and -100s.
The second-generation 737 Classic -300/400/500 variants were launched in 1980 and introduced in 1984. These models were upgraded with more fuel-efficient CFM56-3 high-bypass turbofans. The CFM56-3 engine offered a 25% increase in fuel efficiency over the older 737-200s P&W engines.
The third-generation 737NG -600/700/800/900 variants were introduced in 1997. These models feature updated CFM56-7 high-bypass turbofans, a larger wing, and an upgraded glass cockpit. The 737-600 replaced the 737-500, which faced accelerated retirement due to its smaller size.
The fourth and latest generation, the 737 MAX -7/8/9/10 variants, entered service in 2017. These models are powered by improved CFM LEAP-1B high-bypass turbofans.
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Fuel efficiency measures differ per flight phase
The fuel economy of an aircraft is the measure of its transport energy efficiency. Fuel efficiency measures differ per flight phase, and pilots employ various strategies to improve them.
Takeoff
Takeoff is a highly dynamic phase that requires the engines to work overtime to generate the thrust needed to overcome gravity and reach cruising altitude. While it may seem like a fuel-guzzling spectacle, the shorter duration of this stage compared to the cruising stage keeps its overall fuel consumption lower.
Climb
The climb stage also burns fuel at a high rate per minute, but for a shorter duration. Aircraft can employ optimum climb engine thrust and climb speeds until reaching their cruising levels, which results in time being spent at more fuel-efficient, higher cruising levels.
Cruise
The cruising stage typically accounts for 95-96% of total fuel consumption on long-haul flights. As the plane burns fuel, it becomes lighter and can reach higher altitudes, where it is usually more efficient. Cruising altitudes offer thinner air, reducing drag and allowing engines to operate more efficiently. Additionally, cruising maintains a steady speed, optimizing fuel burn for distance traveled.
Descent
Pilots can plan to fly a Continuous Descent Approach (CDA) or Continuous Descent Operations (CDO) to minimize fuel-intensive level-offs. These techniques ensure a smoother and more efficient transition between flight phases, reducing unnecessary thrust adjustments.
Landing
The landing phase is another dynamic phase that requires significant thrust adjustments.
Overall, by employing various strategies such as optimizing climb and descent operations, choosing direct routes, and reducing weight, airlines and pilots can improve fuel efficiency during each flight phase. These measures not only reduce operational costs but also contribute to sustainability efforts in the aviation industry.
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Fuel economy per seat
The fuel economy of a 737 plane per seat depends on several factors, including the variant of the aircraft, the number of passengers on board, the load factors, and the distance travelled.
The 737-800, the most common variant of the 737NG (Next Generation) family, can carry 162 passengers on a 1000 NM trip, achieving 96 mpg per passenger. This amounts to 0.593 mpg for the entire aircraft.
The 737-800's predecessor, the 737 Classic -300/400/500 series, offered 110 to 168 seats. The -500 variant, in particular, could accommodate up to 140 passengers and provided a 25% increase in fuel efficiency over the older 737-200 models.
The third-generation 737NG -600/700/800/900 variants can seat 108 to 215 passengers. These newer models feature updated engines, larger wings, and upgraded glass cockpits, contributing to improved fuel efficiency.
The latest generation, the 737 MAX -7/8/9/10, can accommodate 138 to 204 passengers. These planes entered service in 2017 and are powered by improved CFM LEAP-1B high-bypass turbofan engines, which likely further enhance fuel economy.
It's worth noting that fuel efficiency can vary widely depending on the operational phase of the flight, such as cruising altitude or takeoff, and other factors like passenger load and distance travelled. Therefore, the fuel economy per seat for a 737 plane can range significantly depending on these variables.
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Fuel flow per engine
The fuel flow per engine of a 737 plane depends on several factors, including the model of the plane, the flight conditions, and the number of passengers on board.
The Boeing 737 is a widely used airliner, and its fuel consumption can vary depending on the specific model and flight conditions. However, a commonly cited figure for the fuel usage of a 737 is approximately 5,000 pounds or 746.27 gallons per hour, which equates to approximately 12.44 gallons per minute. This fuel consumption rate is primarily used to overcome air resistance, which remains relatively consistent regardless of the number of passengers on board.
The 737-800, one of the most common variants of the 737NG (Next Generation) family, burns 850 US gallons (3,200 litres) of jet fuel per hour. This particular model is used by Ryanair, serving routes across Europe, the Middle East, and North Africa.
The fuel efficiency of a 737 plane can also vary depending on the different phases of flight, such as cruising altitude or takeoff. For example, shorter flights using a 737-800 model typically consume about 2.5-3 tons (5,500-6,600 pounds) of fuel per hour.
The original 737-100/200 variants were powered by Pratt & Whitney JT8D low-bypass turbofan engines. The second-generation 737 Classic -300/400/500 variants introduced in 1984 featured more fuel-efficient CFM56-3 high-bypass turbofans. The CFM56-3 engine offered a 25% increase in fuel efficiency compared to the older 737-200 P&W engines.
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Fuel consumption index
The fuel consumption of a Boeing 737 varies depending on the model and flight conditions. For instance, shorter flights using a Boeing 737-800 burn about 2.5-3 tons (5,500-6,600 pounds or 746.27 gallons) of jet fuel per hour. On the other hand, the 737-800, the most common variant of the 737NG (Next Generation) family, burns 850 US gallons (3,200 litres) of jet fuel per hour.
The 737 Classic series, which includes the 737-300/400/500 variants, offered improved fuel efficiency over their predecessors, thanks to the more fuel-efficient CFM56-3 high-bypass turbofans. The CFM56-3 engine provided a 25% increase in fuel efficiency compared to the older 737-200s P&W engines.
The third generation 737NG series, including the --600/700/800/900 variants, further improved fuel efficiency with updated CFM56-7 high-bypass turbofans. The latest generation, the 737 MAX series, features the CFM LEAP-1B high-bypass turbofans, which are even more fuel-efficient.
The fuel consumption index, or FF (Fuel Flow), is a measure of fuel consumption per distance, rather than per time. For example, the fuel flow per engine for a 737-800 cruising at FL370 with a weight of 65 tons is 1231 kg/h. This corresponds to a speed of Mach 0.793 and a fuel efficiency of 0.593 mpg for the whole plane or 96 mpg per passenger for a plane carrying 162 passengers on a 1000 NM trip.
In summary, the fuel consumption of a Boeing 737 depends on various factors, including the model, flight conditions, passenger load, and engine type. The 737 series has undergone several generations of improvements, each offering increased fuel efficiency over its predecessors. The fuel consumption index, FF, provides a measure of fuel efficiency in terms of fuel consumption per distance.
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Frequently asked questions
The fuel consumption of a Boeing 737 varies depending on the model and flight conditions. The 737-800 uses about 2.5-3 tons (5,500-6,600 pounds or 746.27 gallons) of jet fuel per hour. The 737-800 is the most common variant of the 737NG (Next Generation) family.
A 737 plane uses about 12.44 gallons of fuel per minute.
For a 737-800 with 162 passengers on a 1000 NM trip, it's 96 mpg per passenger, or 0.593 mpg for the whole plane.
The fuel consumption of a 737 plane depends on the model and flight conditions, but it generally falls within the range of 2.5-3 tons of fuel per hour. In comparison, a Boeing 747-400 burns around 10-11 tons of fuel per hour, while an Airbus A320 typically burns around 2.5 tons of fuel per hour.
