Gerald Foodman wrote: > It is called the power phase because that is when the power that moves > the boat forward is applied. Please note that I don't claim that lifting your arms is the _only_ source of power. As I explain in the video, there are many ways to add extra power - but using gravity is a good start. > While changing sides, no power at all is applied to moving the boat > forward. > I assume that most of the energy a paddler expends is to move the boat forward. While changing sides, no paddler energy is moving the boat forward. > Do you remember old-fashioned mechanical clocks? Those things used to have a weight to store energy. That weight would slowly move down, giving energy to move the pendulum and rotate the arms of the clock. My explanation builds on that same principle: That energy can be stored as potential energy, reclaimed when moved by gravity, and converted into force and movement. The main difference would be, that a clock needs its weight lifted once a day, while a paddler needs it lifted once a second. Up till now, your arguments are easily refuted with a little knowledge of classical mechanics. I still value your comments, though. I will probably get the same comments from my own students and peers, and you give me a good chance to prepare my answers. Niels *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Sun Apr 24 2011 - 10:41:57 PDT
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