Re: Beginner... Have some questions
I agree Jackster.
It actually forces an arc. A straight rod (the forearm) rotating about a pivot point (the elbow fixed to the book) circumscribes and arc. This was a method for teaching casting with more flexible bamboo rods. The arc countered the bamboo fly rod shortening to form a rod tip SLP.
Modern casting technique frees the arm which allows the caster to use whatever casting stroke is appropriate for the rod and the casting distance. Unfortunately, it also allows a beginner to use the arm like a windshield wiper to flop the line back and forth. This may be the cause of the poor backcast.
When kbass says he does not to bend the arm but uses the forearm, it may be the push-pull technique of pushing and pulling (extending and contracting) the forearm like a piston. This can cause a tailing loop because it may not adequately compensate for the rod shortening during the casting stroke.
We need a video.
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy