Rajan Wilcox
The Cessna Citation X is a high-performing, fast super-midsize jet that has a maximum speed of 0.92 Mach. It is powered by two Rolls Royce AE3007C engines, which generate a total of 13,528 lb f of static thrust while burning an average of 336 gallons of fuel per hour. This fuel burn rate will vary depending on the altitude and speed at which the jet is travelling. For example, at FL430, the jet will burn 2,000 pounds of fuel per hour, while at FL490, it burns 1,400 pounds or 210 gallons per hour. The Citation X has a range of 3,140 nautical miles and can remain airborne for 6 hours.
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What You'll Learn
Fuel burn varies by model
Fuel burn varies depending on the Cessna Citation model. The average fuel burn across all Cessna Citations is 175 gallons per hour, with very light jets burning an average of 110 gallons per hour. The Citation Mustang, for example, burns between 70 and 91 gallons per hour, with a fuel burn of 0.20-0.29 gallons per nautical mile.
The Citation X, on the other hand, burns an average of 336 gallons per hour, or 2,000 pounds per hour. This can vary depending on the altitude and speed of the aircraft. For instance, at FL430, the jet will burn 2,000 pounds of fuel per hour, while at FL490, it burns 1,400 pounds per hour or 210 gallons per hour. At a high-speed cruise of M 0.92 at FL470, the jet burns 1,433 pounds per hour, while at M 0.86 at the same altitude, it burns 1,600 pounds per hour.
The Citation X has a maximum ramp weight of 36,400 pounds, which includes 300 pounds of fuel that can be burned on the ground before takeoff. The aircraft can take on a maximum of 12,931 pounds of fuel, leaving 1,069 pounds for payload. This would allow for five passengers, assuming an average weight of 180 pounds per passenger, with 30 pounds of baggage each.
The Citation X is designed to be a high-performing, fuel-efficient business jet. Its engines have the highest thrust-to-weight ratio and the lowest specific fuel consumption in their class. The jet's speed and performance are due to months of aerodynamic analysis and fine-tuning by aerospace engineers. The result is a jet that can fly from Los Angeles to New York in under six hours and boasts a range of 3,140 nautical miles.
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Fuel burn varies by speed
The Cessna Citation X is a high-performing, fast super-midsize jet that has a maximum speed of 0.92 Mach. It is powered by two Rolls Royce AE3007C engines, which generate a total of 13,528 lb f of static thrust while burning an average of 336 gallons of fuel per hour. This fuel flow rate translates to an average fuel burn of 2000 pounds per hour when flying at FL510, which is the altitude at which the jet achieves its maximum speed.
However, the fuel burn of the Citation X varies with its speed and altitude. For example, at FL430, the jet will burn 2000 pounds of fuel per hour, while at FL490, the fuel burn decreases to 1400 pounds per hour or 210 gallons per hour. The jet's speed also affects its fuel consumption, with a high-speed cruise at M 0.92 at FL470 burning 1,433 pounds per hour, while a slightly slower speed of M 0.86 at the same altitude burns 1,600 pounds per hour.
The fuel efficiency of the Citation X is a result of Rolls-Royce's fine-tuning of the AE3007C1 turbofan engine, which delivers 8,600 pounds of thrust while running at a lower temperature, allowing the jet to operate its engines for extended periods. The engines have the highest thrust-to-weight ratio and the lowest specific fuel consumption for a private jet in its class. Additionally, the jet's precision instruments and aerodynamic structure, optimized through computational fluid dynamics and wind tunnel tests, contribute to its speed and efficiency.
The fuel burn of the Citation X also depends on the payload and range. The jet can take on a maximum of 12,931 pounds of fuel, leaving 1,069 pounds for payload, which includes passengers, baggage, and catering. With a full fuel load, the range of the jet is 3,140 nautical miles, and it can remain airborne for up to 6 hours. However, by sacrificing some fuel load, the range can be extended, and the payload capacity can be increased.
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Fuel burn varies by altitude
Fuel burn does indeed vary by altitude, and there are several factors at play here. Firstly, jet engines have an optimum altitude for economy, which is usually in the mid-30,000 feet range for airliners. As a jet climbs, the amount of air decreases, so to maintain the optimal fuel-to-air ratio, the fuel flow also decreases. This means that less fuel is burned at higher altitudes.
However, it is not as simple as saying that higher altitudes always result in less fuel burn. The efficiency of the engine also comes into play, and this can be affected by a range of factors, including temperature and pressure. For example, the decrease in pressure at higher altitudes can be mitigated by installing a turbocharger in a piston engine, which can improve efficiency. Additionally, the temperature at higher altitudes increases thermal efficiency, as the greater temperature differential between the outside air temperature and the temperature within the turbine results in more efficient thrust output.
The weight of the aircraft also plays a role in fuel burn at different altitudes. As an aircraft burns fuel and loses weight, its optimum cruising altitude increases. This is because, at a higher altitude, the aircraft experiences reduced drag, meaning less thrust is required to achieve the same speed. This results in improved fuel efficiency. Therefore, it is most efficient for an aircraft to cruise at an altitude close to the maximum altitude at which it can maintain sufficient lift.
Finally, it is worth noting that the specific aircraft and its engines also play a role in fuel burn at different altitudes. For example, the Cessna Citation X, a high-performing business jet, has an average fuel burn of 2,000 pounds per hour at FL510. At lower altitudes, such as FL430, the fuel burn increases to 2,000 pounds per hour, and at FL490, it burns 1,400 pounds per hour or 210 gallons per hour.
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Fuel burn and weight
The Cessna Citation X is a high-performing, fast super-midsize jet that has a maximum speed of 0.92 Mach. It is powered by two Rolls Royce AE3007C engines, which generate a total of 13,528 lb f of static thrust while burning an average of 336 gallons of fuel per hour. This equates to an average fuel burn of 2000 pounds per hour.
The fuel burn of the Citation X will vary depending on its altitude. At FL430, the jet will burn 2000 pounds of fuel per hour. Once at FL490, it burns 1400 pounds per hour or 210 gallons per hour. The jet's range is 3,140 nautical miles, and it can remain airborne for 6 hours.
The weight of the Citation X also affects its fuel burn. The aircraft has a maximum ramp weight of 36,400 pounds, which includes 300 pounds of fuel that can be burned on the ground before takeoff. The extra 300 pounds is advantageous during rush-hour takeoffs, as it eliminates the need to burn into fuel intended for the flight. The Citation X has a zero fuel weight of 24,400 pounds, which means that with a maximum payload, it can carry 11,700 pounds of fuel.
The Citation X's basic operating weight, which includes two crew members and catering, is 22,100 pounds, resulting in a maximum payload of 2,300 pounds. If extended range is desired, the jet can take on full fuel at the expense of some payload. In this configuration, the Citation X can carry a maximum of 12,931 pounds of fuel, leaving 1,069 pounds for payload, or approximately five passengers with baggage.
The fuel efficiency of the Citation X was a key consideration during its design. Rolls-Royce developed the AE3007C1 turbofan engine, which delivers 8,600 pounds of thrust while running at a lower temperature to extend the jet's range. The engines have the highest thrust-to-weight ratio and the lowest specific fuel consumption for a private jet in its class.
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Fuel efficiency
The Cessna Citation X is a high-performing, fast super-midsize jet. It is powered by two Rolls Royce AE3007C engines, which generate a total of 13,528 lb f of static thrust while burning an average of 336 gallons of fuel per hour. This works out at an average fuel burn of 2000 pounds per hour.
The amount of fuel burned per hour will vary depending on the altitude at which the jet is flying. At FL430, the jet will burn 2000 pounds of fuel per hour. At FL490, this reduces to 1400 pounds per hour or 210 gallons per hour. At a high-speed cruise of M 0.92 at FL470, the jet will burn 1,433 pounds of fuel per hour, while at M 0.86 at FL470, it will burn 1,600 pounds per hour.
The jet has a range of 3,140 nautical miles and can remain airborne for 6 hours. Its maximum ramp weight is 36,400 pounds, which includes 300 pounds of fuel to burn on the ground before take-off. The jet's zero fuel weight is 24,400 pounds, which means that with maximum payload, it can take on 11,700 pounds of fuel.
The Cessna Citation X is designed to be a fuel-efficient business jet. Its engines have the lowest specific fuel consumption for a private jet in its class, and it can fly from Los Angeles to New York in under six hours.
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Frequently asked questions
The Citation X burns an average of 336 gallons of fuel per hour. However, this may vary depending on the altitude. For instance, at FL430, it burns 2,000 pounds of fuel per hour, while at FL490 it burns 1,400 pounds per hour or 210 gallons per hour.
The fuel consumption of Citation jets varies depending on the specific model. For example, the Citation Mustang burns around 70 to 91 gallons per hour, while the Citation XLS+ burns approximately 211 gallons per hour. On average, Cessna Citations burn about 175 gallons of fuel per hour.
The fuel efficiency of the Citation X is influenced by various factors, including altitude, temperature, winds, and payload. The jet is designed to operate most efficiently at higher altitudes and speeds, resulting in significant fuel and time savings. Additionally, precise flight planning and calculations help optimize fuel efficiency by ensuring the necessary fuel load for each trip.
