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The Hoppi-Copter was a functional backpack helicopter developed by the American company Hoppi-Copters Inc. founded by Horace T. Pentecost in the 1940s. The original Hoppi-Copter consisted of two contra-rotating rotors on a pole attached to a motorized backpack. Although it was capable of flight, it was extremely hard to control.
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References
- ↑ de Narbonne 2011 , pp. 78–79
- 1 2 3 de Narbonne 2011 , p. 79
- 1 2 Bridgman 1953, p. 151
- Bridgman, Leonard (1953). Jane's All the World's Aircraft 1953–54. London: Jane's All the World's Aircraft Publishing Co. Ltd.
- de Narbonne, Roland (July 2011). "Juillet 1951, dans l'aéronautique française: Une alouette...fait quelque fois le printemps". Le Fana de l'Aviation (in French). No. 504. pp. 74–79.