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stroke [2026/10/01 19:53] pstureavley |
stroke [2026/10/01 19:54] (current) pstureavley |
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| - | From [[https://guillemot-kayaks.com/how-paddle-works#:~:text=Ventilation is what you call,average kayaker creates is ventilation.|Guillemot Kayaks]]: | + | From [[https://guillemot-kayaks.com/how-paddle-works#:~:text=Ventilation is what you call,average kayaker creates is ventilation.|Guillemot Kayaks]] (with a couple of notes from our wiki editors): |
| <WRAP center round info 95%> \\ "**Ventilation** is what you call it when the paddle sucks air down the back of the blade. Many people call it **cavitation**, but that is when a propellor spins (Ed. or any object moving fast enough in water) so fast that it creates a vacuum behind the blade (Ed. Note: this is not really vacuum formation, but rather the formation of low pressure space behind the moving object or blade that causes water vaporization). Neither ventilation nor cavitation would help your paddling, but **what your average kayaker creates is ventilation**. The reason it is no good is you are moving air instead of water. Air weighs a lot less than water and if there is air behind your paddle instead of water the mass of water you are moving is decreased and thus creating the same momentum requires you expend more energy. | <WRAP center round info 95%> \\ "**Ventilation** is what you call it when the paddle sucks air down the back of the blade. Many people call it **cavitation**, but that is when a propellor spins (Ed. or any object moving fast enough in water) so fast that it creates a vacuum behind the blade (Ed. Note: this is not really vacuum formation, but rather the formation of low pressure space behind the moving object or blade that causes water vaporization). Neither ventilation nor cavitation would help your paddling, but **what your average kayaker creates is ventilation**. The reason it is no good is you are moving air instead of water. Air weighs a lot less than water and if there is air behind your paddle instead of water the mass of water you are moving is decreased and thus creating the same momentum requires you expend more energy. | ||
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