砂上を進行する車輪の支えホークの傾き

抄録

It is desirable that angle of inclination of the supporting fork of wheels rooling on sand should agree with the direction of the combined force of resistances offered by the sand and the load. But since the direction of the combined resistance varies with the state of the sand, the shape of the rim and the velocity, it is required to change the inclination of the fork according to the working condition.