Hobo locomotives, by Pacemaker

After Athearn introduced his widely acclaimed F7 under the Globe name, many companies took advantage of the inexpensive, highly detailed shells to place on drives of their own design. One such was Pacemaker, who came up with a novel idea. They built a battery powered chassis, insulated from the rails. The idea was that the loco could run randomly around the layout, adding a challenge to normal operations with a second train, running on the same rails. Block wiring, cab control, etc, quickly appeared, and doomed these locos to the bargain bins. Only two road names were ever produced, both were stock Globe shells, and stock schemes.