Abstract:
For small-scale farmers living far from main roads, effective transportation is essential for
promoting economic and social development. It provides access to agricultural inputs,
facilitates the marketing of products, and reduces time and effort. This paper aims to design
and analyze a modified mule cart suitable for Ethiopian conditions. In Ethiopia, existing
carts are often heavy and costly, which does not align well with local working conditions.
To address this, two types of mule carts were designed: a two-wheel cart with a carrying
capacity of 6 quintals and a four-wheel cart with a carrying capacity of 10 quintals. Both
designs incorporate modifications to improve mass and performance, using analytical and
numerical methods (Finite Element Analysis). These mule carts are simple and effective for
transporting goods up to a 10° incline. The two-wheel cart is pulled by a single mule, while
the four-wheel cart can be pulled by either a single mule or a pair, providing flexibility. A
key focus during the design process was mass reduction and simplicity to minimize overall
weight and cost. The designed two-wheel cart weighs 122.6 kg, and the four-wheel cart
weighs 178 kg. The ratio of useful load to cart mass was used for comparison with existing
designs. The ratios for the two-wheel and four-wheel carts are 4.9 and 5.6, respectively,
which are higher than those of existing models. The estimated cost of the modified twowheel
cart is 24,029 birr, and the four-wheel cart costs 36,682 birr, making them
economical options.
Key words: Four-wheel cart; Two-wheel cart; Mass reduction; Modified design; Useful
load to cart mass ratio.