The tyres for animal-drawn vehicles (ADV) are available in the common sizes of 5.00–19 (127–182 mm), 6.00–19 (152–482 mm), 7.00–19 (178–482 mm) and 7.50–16 (188–400 mm). These tires were tested at 5 deflection levels (15, 20, 25, 28, and 30%) and 4 inflation pressure levels at a constant forward speed of 2.41 km/h. Based on the study, it was concluded that the tire sizes 5.00–19 and 6.00–19 may be used on sandy clay loam soil based on the draftability of the bullocks and the size 7.00–19 may be used for hard surface based on coefficient of rolling resistance and draftability. An empirical model was developed to predict rolling resistance of pneumatic wheel as a function of mobility number. The model predicted rolling resistance within 10% accuracy.
Draft animals, Animal-drawn vehicle (ADV), Inflation pressure, Draftability, Towed force (TF), Clay mobility number (Nc)
