an Entity references as follows:
The Hooterville Cannonball is a fictional railroad train featured in Petticoat Junction, an American situation comedy that originally aired on CBS from 1963 to 1970. The train was considered an "important character" by the show's producers, and producer Paul Henning hired railroad historian Gerald M. Best to make sure that the locomotive sounds used on the show were authentic to a train of the same type and age.