KAWAGUCHI & ENGINEERS

Jumbo Koinobori (1988)

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• Location Saitama, Japan
  (Annual event of the Kazo city, cerebrated at the beginning of May)
• Designers Volunteers of the city
• Advisor Mamoru Kawaguchi

Children’s Day, May 5, is celebrated in Japan by flying carps made of fabric. The normal size of flying carps is 3 to 5m in length. Kazo is a city which is famous for production of the fabric carps. In 1988, the city people consulted us after a failing experience about the possibility of flying a 100-meter-long carp that they had made for the purpose of advertising their city. There were three questions asked; Could the jumbo carp fly? If it could fly, how would it fly? Could the cotton skin stand stress during the flight? A dimensional analysis for flying conditions of the jumbo carp, a calculation of membrane stresses, and a series of wind-tunnel tests were undertaken, and the answers to the above questions were all obtained. After implementing improvements to the original design, the jumbo carp, a huge flying membrane, began to fly with the breeze and swam elegantly in the sky.

Yoyogi Olympic Stadium Sant Jordi Sports Palace Namihaya Dome Nara Convention Hall Xativa Bullring The Expo’70 Space Frame for the Festival Plaza Expo’70 Fuji Group Pavilion Pavilions for the 12th World Orchids Conference Onishi Hall
Aira Gymnasium Hyuga-shi Station JR Kochi Station Ceramic Park MINO Inachus Bridge Yong-Le Bridge Genome Tower Tianjin Monument Jumbo Koinobori