小型牽引動力負荷試験車の試作研究

抄録

To measuring drawbar pull of garden-tractors, we made a small dynamometer car. The car is equipped with an air-compressor driven by a 2h. p. air-cooled engine, and an air-brake cylinder operated by tramcar type control valve. Any variable load can be applied on the testing tracter. A hydraulic type traction dynamometer is also attached to the car. The recording unit operated by a land-wheel, marks drawbar pull, No. of rotation of driving wheel and time mark per second, on a recording-paper. Then we can compute easily traction efficiency, coefficient of traction, slippage of driving wheel, running distance, and travel speed, etc. A few field-test results are shown on this paper, but other tests will be reported next time.