8.5-Ton kite
Naruto City, Japan -- In 1936, kite lovers here constructed what they say was history's largest kite. It was made of 3,000 sheets of ligh [sic] paper, each sheet measuring about 16 by 20 inches. The assembled kite weighed 8.5 tons.
-- from the Daily Courier, Connellsville, PA., 1 Aug 1972, page 18.
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My calculations
8.5 tons = 8.5 x 2000 pounds = 17,000 pounds
16 x 20 sheet of paper = 2 oz
8 sheets = 1 pound
3000 sheets = 3000 / 8 = 375 pounds of paper
weight of kite frame = 17,000 - 375 = 16,665 pounds
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Conclusion: They call it Mitsubishi Heavy Industries for a reason.
FYI: The largest kite ever flown, has a total lifting area of 950 m² (10,225.7 ft²). When laid flat, it has a total area of 1019 m² (10,968.4 ft²). The kite measured 25.475 m (83 ft 7 in) long and 40 m (131ft 3 in) wide. The kite was made by Abdulrahman Al Farsi and Faris Al Farsi and flown at the Kuwait Hala Festival in Flag Square, Kuwait City, Kuwait on 15 February 2005. -- Guinness Book of World Records