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Advice, Suggestions and General Help New Topic Printer Friendly Version

  Winters
  Posted by: CEWilson on Feb-27-13 2:18 PM (EST)
 

John Winters, the Shape of the Canoe, has a cogent discussion of surface friction, pgs 21-22.

The formula is K=14/v, K being grain size in mils, v being in ft per second. He states a grain size of 3 mills starts increasing friction at the 3mph pace.

Bringing the pace up nearer race speed, 10 fps suggests we need a cleaner surface than that, more like 1,5 mils to minimize skin friction. 400 grit paper is 23 microns=1 mil, 600 grit paper is 16 microns, hence .75 mill, so either will do fine in prepping a scratched hull.

 Great Products from the Buyers' Guide:

Kayak Seats

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Cartop Kayak Carriers

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