On Jul 17, 11:06*am, Galen Hekhuis wrote:
On Fri, 17 Jul 2009 03:50:22 -0700 (PDT), Davej
wrote:

So what sort of an adjustable handicapping device could be used for
rolling practice to properly simulate aerated water -- and how could
you calibrate it? Thanks.

Maybe you could use aerators like in ponds and calibrate it by the cfm
consumption.

Well, I was thinking more in the direction of a counter-torque applied
to the kayak by something like a float -- but maybe a better idea
would just be a paddle with extra small blade or maybe a blade drilled
full of holes?