1. Calculate the spring energy stored (in ft·lbf) in the rod just prior to release of the bait as a function of the bend in the rod (an expert caster will create maximum deflection in the rod).
2. Calculate the speed of the bait (in ft/s) assuming all the spring energy in the rod is transferred to the lure as Kinetic Energy. Assume the velocity imparted by the cast motion before the rod "snaps" is 44 ft/s, so the total energy of the lure is KE @ 44 ft/s + spring energy stored in rod.
3. Using a projectile calculator http://www.ajdesigner.com/phpprojectilemotion/range_equation.php
Calculate the cast distance of the rod.