What component in an electrically-timed fuze replaces the arming vanes used in mechanically timed fuzes?

The correct component that replaces the arming vanes used in mechanically timed fuzes in an electrically-timed fuze is the electric charging assembly. In traditional mechanically timed fuzes, arming vanes are responsible for enabling the fuze mechanism upon deployment, as they rotate in the airstream. For electrically-timed fuzes, this mechanical arming system is replaced with an electronic mechanism that relies on a battery or other electrical power source.

The electric charging assembly plays a crucial role in this process by generating and regulating the electrical energy necessary for the fuze's operation. It ensures that the fuze is armed when appropriate conditions are met, based on electronic signals rather than mechanical movement. This advancement eliminates mechanical failure points and enhances the reliability and precision of the fuze.

This understanding positions the electric charging assembly as an essential component in modern fuzes, highlighting the evolution from mechanical to electronic systems in munitions technology.