Which of the following best describes the impact on running load when weight is added to a longer side?

When weight is added to a longer side, the overall running load decreases due to the distribution of weight and its effect on the aircraft's center of gravity (CG). In aviation, the running load refers to the load that the aircraft structure experiences during operation, which is influenced by how weight is allocated throughout the aircraft.

Adding weight to a longer side causes the center of gravity to shift, causing the aircraft to aim for a new equilibrium. This shift often results in a decrease in the load experienced on the opposite shorter side, as the weight tends to create a more balanced condition. The further weight concentration yields a tendency to equalize or stabilize the loads across the aircraft's structure.

Understanding this dynamic helps in maintaining safety and efficiency. In practice, if the longer side is overburdened with weight, the aircraft may experience potential structural issues or handling difficulties. Properly analyzing the impacts of load distribution is crucial for flight safety and performance during takeoff, cruising, and landing phases.