1. You can not make any kind of a cast, until you get the end of your fly line moving.
2. A fly rod is nothing but a very expensive lever-The further you move the lever, the more it helps you make the cast.
3. Your fly line is going to travel in the direction the rod tip travels at the end of the casting stroke.
4. The size of your loop is determined by the distance the rod tip travels during the speed-up-and-stop.