Balloon helicopter: Difference between revisions
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A '''balloon helicopter''' is a toy helicopter made of a latex [[balloon]] and a plastic [[propeller (aircraft)|propeller]]. The most important feature is the hollow propeller hub which directs air into a passage in each propeller blade. The air passages channel air to the blade tips such that air escapes in a fine jet tangentially. The air jets on the blade tips causes the entire toy to spin, the blades have a positive angle of attack so the blades experience a lifting force as they push air downwards. It can attain a height of approximately 12 meters (40 feet). Full-scale helicopters have been built around this [[tip jet]] configuration. |
A '''balloon helicopter''' is a toy helicopter made of a latex [[balloon]] and a plastic [[propeller (aircraft)|propeller]]. The most important feature is the hollow propeller hub which directs air into a passage in each propeller blade. The air passages channel air to the blade tips such that air escapes in a fine jet tangentially. The air jets on the blade tips causes the entire toy to spin, the blades have a positive angle of attack so the blades experience a lifting force as they push air downwards. It can attain a height of approximately 12 meters (40 feet). Full-scale helicopters have been built around this [[tip jet]] configuration. |
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==See also== |
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* [[List of inflatable manufactured goods]] |
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== External links == |
== External links == |
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Revision as of 21:00, 19 May 2013
A balloon helicopter is a toy helicopter made of a latex balloon and a plastic propeller. The most important feature is the hollow propeller hub which directs air into a passage in each propeller blade. The air passages channel air to the blade tips such that air escapes in a fine jet tangentially. The air jets on the blade tips causes the entire toy to spin, the blades have a positive angle of attack so the blades experience a lifting force as they push air downwards. It can attain a height of approximately 12 meters (40 feet). Full-scale helicopters have been built around this tip jet configuration.
See also
External links
- [1] Physics teacher Robert Douglas discusses Newton's Third Law and understanding force pairs with this demonstration using the Balloon Helicopter
- [2] A demonstration video of assembly and launch.
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