Tractor Testing; Drawbar; Shaw Du-All

Test 136, 1927, Shaw Du-All model T25 being tested. The Adams test car is being used during the drawbar test. The operator, who is sitting on the test car, is holding the tractor control handles.The pull cylinder can be seen in front of his feet. The technician taking the data is sitting on the rear bench of the test car. This test car was apparently specially made for this test because this was an unusual tractor. It looks like it was made from the rear part of a passenger car. A large round tank was added in the back, and they probably used an axle-driven water or oil pump with a throttle valve to generate the drawbar load. The east campus power plant is in the background