Which component is essential for the operation of a Wheel device?

A Wheel device, used in fireworks and special effects, requires a framework to which the gerbs or rockets are attached. This framework provides the necessary structure for the Wheel, allowing it to rotate and display the desired effects safely and effectively. It serves as the foundation for mounting the pyrotechnic devices, ensuring stability and proper alignment during operation. The gerbs or rockets attached to the framework create the visual and auditory effects characteristic of Wheel devices.

While other components, such as an ignition source, continuous power supply, or timer mechanism, may play roles in specific types of fireworks or effects, they do not define the essential operational structure of the Wheel device itself. The framework is critical as it directly supports the entire assembly and its functioning.