What construction technique minimizes the impact of a motor failing to ignite in a cluster rocket?

Aligning holes to the rocket's centerline is vital in minimizing the impact of a motor failing to ignite in a cluster rocket. When the ignition holes are aligned with the rocket's centerline, it ensures that the thrust generated by the ignited motors is directed in a straight line through the rocket's center of gravity. This alignment helps maintain stability and control, reducing the chance of the rocket veering off course if one motor fails to ignite.

Maintaining proper alignment allows the thrust from the operational motors to work in unison, providing balanced lift and preventing any lateral forces that could result from misaligned thrust. In the case of cluster rockets, where multiple motors are used, the duty of each motor is to contribute evenly to the overall thrust. Should one motor fail, the aligned configuration ensures that the remaining motors can still effectively manage the rocket's trajectory, compensating for the loss of thrust from the unignited motor.

The other options, while may have their own purposes within rocket design, do not directly address the stability and control issues related to a cluster motor's failure to ignite.