Bamboo-copter
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Bamboo-copter (竹蜻蜓 "bamboo dragonfly") is a Chinese children's toy invented around 400 BC [1]. It essentially consists of a propeller on a stick, and rolling the stick in the right direction spins the propeller, causing the toy to "take off" when it is let go of. This toy made its way to Europe and is depicted in a 1463 European painting.[2] "Bao Pu Zi" (抱樸子) was a 4th century book in China that described some of the ideas in a rotary wing aircraft[citation needed]. In the USA, these are sometimes sold as Wooden Puddle Jumpers[citation needed].
[edit] References
- ^ Leishman, J. Gordon (2006). Principles of Helicopter Aerodynamics. Cambridge University Press. p. 7. ISBN 0521858607, 9780521858601.
- ^ Goebel, Greg. "The Invention Of The Helicopter". Vectorsite.net. Retrieved: 11 November 2008.
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