The D Plane is a model used to explain ball flight. The D Plane consists of two vectors: the top vector is the 3D Club Face and the bottom vector is the 3D Club Path. The ball will start between the two vectors and curve towards the Club Face vector.
*Note: The D Plane model assumes a perfect centered hit (i.e. no Gear Effect). Gear Effect can cause the D Plane’s predictions to be off.