Discussion on “the educational value of an electric test car” at Milwaukee, Wis., May 30, 1906

P. M. Lincoln: What degree of accuracy can be obtained from the accelerometer? The accelerometer, as I understand it, operates from a change of voltage in the transformer, which is caused by a change in current, which in turn is caused by a change in speed. It seems to me that the magnetic lag of the transformer would cause a considerable error in regard to the change in voltage and change in current. Just how much that amounts to, and how an accurate result could be obtained is the question.