12/27/2022 0 Comments Flight plan fsx![]() While nearly all computer flight planning systems can optimize routes, many airlines still use fixed "company routes" most of the time. This route is 11 percent longer than a great circle route, but is 2 percent faster and uses 3 percent less fuel. This flight from Jakarta to Honolulu illustrates that a wind-optimal flight path may be far from the great circle. Because they are often making these decisions shortly before departure time, a user-friendly presentation of the relevant information is vital.įigure 3: Forecast winds must be considered to find the optimal route While the scenario chosen by the system might be used most of the time, dispatchers and operations managers at an airline's control center may choose another scenario to meet the airline's operational goals, such as routing of airplanes, crews, and passengers. As a result, tens to hundreds of thousands of individual calculations are required for a single flight.Īn optimal flight planning scenario for saving fuel and emissions involves calculating multiple routes or operating approaches for each flight, ranking these scenarios by total cost, choosing the scenario that best accomplishes the airline's cost objectives, and providing summaries of the other scenarios for operational flexibility (see fig. Some of the equations that describe the behavior are nonlinear and noncontinuous, and the airplane state is dynamic (i.e., it depends on how the airplane has gotten to a specific point, not just where it is). The mathematical nature of these constraints and the overall size of the calculation combine to make it a challenging problem, even by modern optimization standards. An optimized flight plan must not only take into account the correct physics (i.e., airplane performance and weather) but also route restrictions from ATC and all relevant regulatory restrictions. Optimization can be challenging because it involves a number of different elements. While flight plan calculations are necessary for safety and regulatory compliance, they also provide airlines with an opportunity for cost optimization by enabling them to determine the optimal route, altitudes, speeds, and amount of fuel to load on an airplane. These variations are subject to airplane performance, weather, allowed route and altitude structure, schedule constraints, and operational constraints.
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