Seyedreza Hamedmousaviyan
wheels on water.
Rel. Costantino Manes, Enrico Galvagno, Federico Colombo. Politecnico di Torino, Master of science program in Mechatronic Engineering, 2020
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Abstract
More than 70% of the earth is covered by water, thus, it plays a critical role in terms of transportations. For this reason, sailing is known as one of the greatest achievements of human beings. Though the water is known as an efficient way of transporting heavy objects over long distances, yet it is a time-consuming way of traveling. Due to the limitations caused by the water at high velocities, it is quite challenging for high-speed water-crafts to work efficiently. One of their biggest problems is the drag force due to the contact area between the water and body, that is opposing to the movement and is a function of velocity squared.
Since the drag force is strongly related to the velocity, even a small variation of the velocity can increase it significantly and consequently the power requirement can become large, that is the reason why the top speed of commercial water-crafts, such as jet-skis and boats is limited
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