The document describes a sumo robot being built for a competition that will take place on April 18, 2009 at the Marion Ohio County Fairgrounds. The competition rules state that robots must be smaller than 2' x 2' x 2' and weigh 125 pounds or less, and must operate autonomously without remote control. The objective is to push the opposing robot out of a 15'2" ring. The economic analysis lists the electronic and mechanical components being used, with a total cost of $717.64. An environmental analysis notes that the batteries used do not vent gases. The document discusses problems encountered with the circuit board design, battle kit mounting, and axle machining, and solutions developed to address these issues.