When securing an assembly, why are spring clamps preferred?

Spring clamps are preferred for securing an assembly primarily because they provide constant pressure. This is essential in many aerospace applications, as maintaining consistent force on components ensures proper alignment and fit. The constant pressure helps prevent any movement or misalignment during assembly and curing processes, which is critical for ensuring the structural integrity and performance of the assembly.

In aerospace, where precision is paramount, utilizing a clamp that can maintain uniform pressure reduces the risk of gaps or inconsistencies that could potentially lead to structural failures or complications during operation. The ability to adjust and maintain this pressure over time through the spring mechanism allows for a stable and secure assembly process without the need for continual adjustments.

The other options, while potentially beneficial in certain contexts, do not emphasize the advantages that constant pressure offers in securing assemblies in aerospace applications.