In aircraft design, “twist” refers to the variation in the angle of incidence or the angle of attack along the span of an aircraft’s wing. Twist is a critical design parameter that can influence an aircraft’s aerodynamic performance, stability, and control.
Formula: The formula for calculating twist is not a single equation but rather a description of how the angle of incidence or angle of attack changes along the wing’s span. It is typically expressed graphically as a twist distribution.In more mathematical terms, you can represent twist as a function:
- θ(x) represents the twist angle (in degrees or radians) at a specific position x along the wing’s span.
- f(x) is the mathematical function that describes how the twist angle varies with spanwise position x.