Craft Team STARSS

Introduction

past activities

In 2020, the Roller Coaster activity started at the Koryo Festival held at Oyama Kosen. The next year, however, the Koryo Festival did not give permission for the public to ride the roller coaster, so the public was not allowed.

In 2022, the coaster "Eagle," which was built for the third Koryo Festival, was finally manned and operated for the general public. The results were amazing, and more than 180 people were able to ride the coaster during the two-day operation. The Koryo Festival ended with a great success, receiving much praise not only from the visitors but also from the faculty members of the school.

The scale of the coaster has expanded every year, and while the total budget for 2020 was approximately $660, the budget for 2022 was over $4,600. At the Koryo Festival 2022, the Shimotsuke Shinbun, a local newspaper in Tochigi Prefecture, interviewed us and published our work in the newspaper.
Furthermore, a professor of Oyama Kosen and others suggested that the "Eagle" produced in 2022 could be preserved and that activities after the Koryo Festival could be carried out. As a result, we were able to obtain the cooperation of a kind-hearted person who lent us his private property, which made it possible to preserve the work and smoothly carry out activities after the festival.
In addition, a company run by an alumnus of Oyama Kosen offered to sponsor the event, and we decided to participate in the "Oyama-ichi" event in Oyama City.

2022's Work - Eagle

The 2022 activities are the culmination of three years of work. Last year we had about 20 members, but this year we had a small group of 6. We welcomed as regular members only those who could spend almost all of their summer vacation time and bear the expenses, which amounted to several tens of thousands of yen.

Of course, there were many family members and classmates of the participating members who helped out with the work and with the transportation of supplies. With the help of these kind-hearted people, we were able to make this production a great success. We also received generous support from companies, including bolts and nuts from Kikaku Kogyo, steel from Oyama Kozai, and advice from Oyama Kosen alumni on the structure of the machine and how to assemble it. (URL of the company's website)

The design of the "Eagle" began in May, and from the early stages of design, it was decided that it would be annular in shape and that a winch winch mechanism would be implemented. At this point, the plan was to make a significant evolution from last year and to create something of high difficulty. As we proceeded with the design, we spent a great deal of time examining the structure, including the implementation of canting in curves and devising a cart to accommodate three-dimensional turning.

The summer production was a camp production for more than three times longer than last year. However, due to the scale of the project and the implementation of new plans, we were unable to complete it during the vacation period, and it was not until one week before the Koryo Festival that we were able to confirm that the car was running in its complete state.

After overcoming repeated problems, the train was finally manned in the afternoon on the day of the Koryo Festival. On the second day of the Koryo Festival, there was a problem with the rear wheel, but the train was back in operation in the afternoon, and a total of more than 180 people rode on it over the two days of the festival.

The following images are screenshots of the CAD software, while the other photos are snapshots or souvenirs taken during production.