The Japan Institute of Technology opened a new "Practice" solar car developed for participation in the "World Solar Vehicle Challenge 2013" (WSC 2013) at the Global Solar Car Contest. This is the first time for the university.

WSC 2013 is the world's largest solar car competition with a distance of about 3,000km from Darwin, Australia to Adelaide. The schedule of the game is October 6-13, 2013. In 2009, the College of Engineering College launched the "Solar Car Project" and has been developing solar cars. In 2012, the university won the championship at the "World Green Challenge 2012" (WGC 2012) competition in Japan. Practice is a newly developed four-wheel solar car that inherits the concept of solar car (No. 1 car) used by WGC2012. New parts and new technologies were adopted with the assistance of the company.

According to the University of Technology's introduction, the tires were developed by Bridgestone based on the company's low-fuel tire "green song partner" technology to newly develop solar vehicle products with relatively small rolling resistance and air resistance. Tread patterns are also specially processed to achieve excellent running performance on dry roads.

Wheel bearings use deep groove ball bearings developed by Ceramics for Practice. The deep groove ball bearing precision grade is JIS-5 grade, two levels higher than the general JIS-0 grade, thus improving the rotation accuracy. From the perspective of the numbers, the bearing's accuracy grade is rather strange. It is 6 grades higher than 0 grade and 5 grades higher. The bearing changed the steel ball into a ceramic ball and reduced the contact area by optimizing the curvature of the rolling contact surface, while reducing the rolling resistance by using a low-viscosity oil. With these improvements, the rotational torque is reduced by 50% compared to the original product. In addition, in order to be able to travel in the desert, the steel sheet gasket has also been replaced with a non-contact rubber gasket, which has improved the ability to prevent the entry of foreign materials.

The Carbon Fiber Reinforced Polymer Matrix Composite (CFRP) used for the bodywork is provided by Teijin Group. Specifically, CFRP made from ultra-thin carbon fiber is used by Dongbang Tenax Co., Ltd. The strength is the same as that of the original carbon fiber, but its weight is only one-third. According to the University of Technology's introduction, this CFRP has been adopted by the body of the F1. By using this CFRP, the weight of Practice was reduced to 160kg, which was more than 30% lighter than the 230kg of No. 1 car. The motor is provided by Mitsubishi (MITSUBA). The university said that Sanye has developed an optimized winding motor for Practice. In addition, the details of the battery were not disclosed this time.

Although this is the first time that the university of technology has participated in the WSC, Bin Genyang, an associate professor of mechanical systems engineering at the Faculty of Engineering of the engineering group led by the project team, confidently stated, "I believe we can win." The reason for such confidence is not only that the vehicle adopts the above-mentioned new technology, but also that the University’s solar car development policy has met the new rules of WSC 2013 in advance. For example, the mainstream of WSC racing cars in the past was a three-wheeler model, and WSC 2013 stipulated that the participating vehicles must adopt a four-wheel design. In addition, the driver's posture must not be lying down, but must maintain a seated position, while also ensuring that the body can be tilted 45 degrees forward, tilted back 25 degrees of space. In fact, the university's solar car project has proposed the goal of "safety vehicles without human cost and practicality" since its inception in 2009, and has been developing a four-wheel solar car with a low center of gravity and seated driver's seat. Therefore, the university believes that it is easy to deal with the latest rules of the game, which has advantages over other teams. "We want to show the world the strengths of Japan" (Bingen). In addition, according to the university, the meaning of the name of the car name practice is to practice the university's solar car concept.

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