"The Muskrat"
Archimedes Screw
Steam Engine

The Muskrat is a concept vehicle, demonstrating the technology available during the American Civil War and utilizing the opposed screw drive. With extensive sabotage and damage to the rail infrastructure during the war, this steam powered vehicle would have allowed travel through swamps and fields of 19th century America. Designed as an artillery hauler and support vehicle, it would have performed similarly to an army tank in the field, on paved roads or rocky ground, however, it would have a tendency to skew sidewise rather than moving forward in a straight line.