Changes

| Nature of the revolutionary motor at the [[Twentieth Century Motor Company]]

| Nature of the revolutionary motor at the [[Twentieth Century Motor Company]]

| An [[John Galt#The electrostatic motor|electrostatic motor]]

| An [[John Galt#The electrostatic motor|electrostatic motor]]

| A '''[[John Galt#The quantum motor|quantum motor]].''' The explanation given in the film is less than accurate; it uses terms like "Casimir Effect" and "Atmospheric vacuum" in an attempt to explain something that the script writers probably did not understand. Nevertheless, a qoantum motor, using quantum vacuum and Casimir-Lorentz forces, ''would'' be feasible.

| A '''[[John Galt#The quantum motor|quantum motor]].''' The explanation given in the film is less than accurate; it uses terms like "Casimir Effect" and "Atmospheric vacuum" in an attempt to explain something that the script writers probably did not understand. (Its attempt to substitute [[helium]] atoms for the nanoparticles on which a real quantum motor would depend has earned much of the scorn of [[Mainstream Media]] critics—not that the critics themselves would grasp the concept of a quantum motor.) Nevertheless, a quantum motor, using quantum vacuum and Casimir-Lorentz forces, ''would'' be feasible.

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