砂上における車輛の牽引抵抗について
1954 年 23 巻 2 号 p. 60-64
詳細
1954 年 23 巻 2 号 p. 60-64
Previously the anther measured the resistance of a single wheel rolling on dry sand and made a report.
From that experiment, he obtained the following results:
1. The depth of the wheel sinking into the sand and the horizontal or the vertical component of the resistance stand in logarithmic linear relationship.
2. In the case of a constant sinking depth, the larger the diameter and the thickness of the wheel, or the bigger the grain size of the sand, or the harder the state of the sand, the more the resistance with increasing rate.
3. Variation of the resistance accaording to the velocity is negligibly small. As the vertical and horizontal components of the resistance depend on the weight of a car and on the pulling resistance, the data for the single wheel can be applied for a car.
In this paper, relations between the traction resistance and the weight, the center of gravity, the velocity of the car, the shape of the wheel, the grain size and the state of sand are observed.
