CONTROLLER REGULATES FUEL CELL TRACTOR
March 24, 1959 (243-59)
This compact controller regulates the speed and reverses the Allis-Chalmers experimental fuel cell tractor. Electricity to drive the research vehicle comes from 1,008 fuel cells. A chemical reaction within each individual fuel cell produce direct current. The power thus generated goes through bus bars to the controller which places the four banks of fuel cells in series or parallel and thus varies the amount of electricity reaching the 20-horsepower motor. The reversing lever changes the polarity of the current reaching the motor.
Original Caption by Science Service