Which of the following is required to calculate an aircraft bracket?

To accurately calculate an aircraft bracket, it is essential to consider several factors, which the correct choice outlines: setback, flat length, bend allowance, and developed length.

The setback is critical because it determines how much the material will be displaced when it is bent, which affects the overall dimensions of the bracket. The flat length represents the length of the material in its unmolded state before any bending occurs. Bend allowance is used to account for the extra length required due to the curvature of the bend; this ensures that the final product fits as intended in the assembly. Developed length is the total length of the material needed in the flat state to achieve the desired dimensions after all bends are made.

By taking into account these parameters, engineers can ensure that brackets are accurately manufactured to fit properly within the aircraft structure, maintain structural integrity, and perform their intended function. This comprehensive approach is necessary for achieving the required specifications in aerospace applications.