On Wednesday, June 11, 2003, at 10:57 AM, Rcgibbert_at_aol.com wrote: > In a message dated 6/10/2003 1:46:34 PM Central Daylight Time, > michaeldaly_at_rogers.com writes: > > >> . However, Nick Schade has presented >> convincing reasons for believing that the lift on a GP doesn't >> actually contribute to the forward motion as such (this discussion is >> achived in QajaqUSA's web site) or at least not in the way that wing >> paddles do. >> > > Then I have a question: When one slices the paddle verically down a few > inches into the water, absolutley perpendicular to the boat, then > flatten the blade > so that the entire width of the blade is popped upwards, one will get > forward > motion. Is that not lift generating forward motion? > > We did that scenario at the recent greenland symposium here on the west > coast. we sliced the blade down just a few inches, flattened it and > popped it back > up. No rotation, no sweeping, nothing. We did it many times on each > side, > achieving about a knot, maybe more of speed. I have done that too and I agree that what you are doing uses lift almost exclusively. It is kind of an entertaining way to move. However it helps demonstrate why I don't think lift is a big constituent in most paddle strokes. Your really need to move your paddle fast to go only 1 knot using this pure lift stroke. Cruising along at 3 or 4 knots requires significantly more power yet most people are quite able to make their boat move at those speeds with a much more relaxed cadence. It seems obvious to me that if you can go significantly faster with a conventional stroke than you can with a pure lift stroke, most of the power in the conventional stroke must come from something other than lift. I also just don't see a lot of transverse (side-to-side) or vertical (up-or-down) motion in most peoples stroke including the various forms of Greenland strokes out there. The Wing paddle stroke does include a fair amount of transverse motion, but even with the wing paddle which was invented on the theory of incorporating lift, there is some question as to whether lift is a significant portion of its power. Nick Schade Guillemot Kayaks 824 Thompson St Glastonbury, CT 06033 USA Ph/Fx: (860) 659-8847 http://www.guillemot-kayaks.com/ *************************************************************************** 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 Wed Jun 11 2003 - 10:49:05 PDT
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