The way I think of my forehand is like a double pendulum.
Imagine your hand as the first pendulum and the racket head as the second. Imagine you are ready for the swing, you drop your racket hand and let it gain speed, the racket would lag behind because of the loose wrist.
At some point the racket really starts gaining speed and without using any force, it simply whips around.
Think about Trebuchets as well.
Wilson [K]Six-One LITE
Wilson nSix-One Tour