telltales
Telltales are simple indicators designed to reveal the direction and quality of airflow or the status of a system. They are typically lightweight devices such as yarn, ribbon, or small flags attached to a surface, providing immediate, visual feedback without instruments. Telltales are used in sailing, aerodynamics testing, and various engineering applications to illustrate flow patterns and assist in adjustments or diagnostics.
In sailing, telltales are commonly attached to sails and sometimes the rigging. Small strands of yarn or
In aviation and aerodynamics, telltales serve as flow-visualization tools during development, testing, and training. Strands or
Beyond maritime and aeronautical use, telltales appear in other industrial contexts to indicate airflow or fluid