Build a working ROTARY ORDER BOARD.

This article from Model Railroader discusses the process of building a working rotary order board for a model train layout. The author describes the historical background of rotary train order signals and their use on railroads in the early 20th century. The article provides step-by-step instructions for constructing the order board, including details on creating the signal blades, axle for rotation, staff and bushing, movement assembly, lantern and wiring, and the servo motor and control. The author also shares photos of the completed order board on their model train layout. [Extracted from the article]