What function does the lock ring serve in a 30 mm M505A3 impact fuze?

The lock ring in a 30 mm M505A3 impact fuze primarily serves the function of holding the rotor in place. The rotor is a critical component of the fuze that must remain stable and properly positioned until the projectile impacts the target. By securely holding the rotor, the lock ring ensures that the internal mechanisms of the fuze are correctly aligned and ready for operation, allowing for accurate triggering upon impact.

This function is essential for the reliability of the fuze, as any misalignment or movement could lead to premature detonation or failure to detonate at the intended time. The lock ring's role is vital in maintaining the integrity and functionality of the fuze mechanism, making it a key element in the overall design of the M505A3 fuze.