What is the main function of a launch lug or rail buttons on a rocket?

The main function of launch lugs or rail buttons on a rocket is to guide the rocket along the launch rod or rail. These components are essential for providing stability as the rocket ascends at the initial phase of the flight. During launch, the lugs or buttons slide along the rail or rod, ensuring that the rocket maintains a straight trajectory while it gains speed. This guidance helps prevent any yaw or lateral movement that could destabilize the rocket during the crucial early moments of flight when it is most susceptible to aerodynamic forces. Proper alignment and guidance are critical at this stage to ensure safe and successful launch performance.