On Sun, Aug 1, 2010 at 2:15 AM, <rebyl_kayak_at_energysustained.com> wrote: Alternatively we could take the tri-axial data from the paddle and interpret it, if its coming fast enough. I haven't heard back from the Talon people about a definite meeting time though they did say they were happy to meet. I'll try putting the questions in an email to them. Craig Jungers wrote >>>>>>>Wouldn't this only measure the acceleration of the paddle and not the kayak? Don't you want both to determine the efficiency of the paddle and the strokes? I actually do think that a paddlewheel-type velocity sensor would give you the best instantaneous data (if sampled quickly enough) which can then be compared to the GPS data.<<<<< Since over time (after a few strokes) the paddle is moving at the same speed as the kayak the accellerometers in the paddle should be able to allow its average speed to be calculated. I don't know how well a paddle wheel can measure the surges and speed loss from the strokes but you will still be averaaging data over some time period to get the average speed for a given effort. Since we also know what the paddle angles are at all times the average speed could be determined from points when the paddle is at the same angle (point in the stroke) over several strokes. It would be nice if the Talon paddle data could just be calculated in a way to provide an average speed. *************************************************************************** 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 Aug 01 2010 - 16:54:26 PDT
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