Balloon helicopter: Difference between revisions

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A balloon helicopter is a flying toy consisting of a latex toy balloon and a plastic propeller, derived from the simple balloon rocket. 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.

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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-A '''balloon helicopter''' is a toy helicopter comprised of a latex [[balloon]] and a plastic [[propeller]].  The propeller is driven by the [[Pneumatics|pneumatic]] action of [[air]] escaping from the balloon, traveling through nozzles embedded within the center of the propeller.  The propeller's rate of rotation increases as air continues to leave the balloon, creating [[Lift_(force)|lift]] and causing the device to [[flight|fly]] in an upward direction.
+A '''balloon helicopter''' is a flying toy consisting of a latex [[toy balloon]] and a plastic [[propeller (aircraft)|propeller]], derived from the simple [[balloon rocket]]. 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&nbsp;feet). Full-scale helicopters have been built around this [[tip jet]] configuration.
+==See also==
-A typical balloon helicopter, at full capacity, can fly for approximately 20 seconds and can attain a height of approximately 12 meters (40 feet).
+* [[Balloon rocket]]
+== External links ==
-{{Toy-stub}}
+* [http://video.google.com/videoplay?docid=1410167926297575940] Physics teacher Robert Douglas discusses Newton's Third Law and understanding force pairs with this demonstration using the Balloon Helicopter
-[[Category:Toys]]
+* [https://www.youtube.com/watch?v=rtBWcSkpC3k] A demonstration video of assembly and launch.
+[[Category:Educational toys]]
-[[de:Ballonhelikopter]]
+[[Category:Inflatable manufactured goods]]
+{{Toy-stub}}