Didn't they work with micro textures on the hulls of the America's Cup boats a few years ago? I seem to recall it was supposed to decrease drag. I seem to recall they also had something similar a few years back for the Olympic swim team suits. ------------------------------------------------------------------------------- When logic and proportion Have fallen softly dead, Remember what the dormouse said: "Feed your head. Feed your head. Feed your head" -WhiteRabbit > This is exactly correct. The reduction in drag that can be gained by > increasing the surface roughness, as in a golf ball, occurs over a very > narrow range of Reynolds number. As I recall it is in the 600,000 to > 1,000,000 range (about where a golf ball is at). It occurs in the > "transition" range, where the flow transitions from laminar to turbulent. > Kayak hulls are way beyond transition; 2 billion Rn (this is for a 16ft > LWL, 6 ft/sec speed, in cold water). There would be no benefit to the > dimpling of a kayak hull. *************************************************************************** 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 Tue Sep 28 2004 - 21:58:37 PDT
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