On Mon, 18 Dec 2006 11:41:53 -0700, "Gilligan"
wrote:

Frictional resistance varies as the wetted surface area.
ok

Frictional resistance varies with the square of speed.

ok (force)

Power to overcome skin friction (speed x force) varies with the cube
of speed.


The speed will change as of the square root of wetted surface area change.


Not "for a fixed power input"

V=(P/k * A)^1/3
V speed, P power k a constant

For small increases in area, the decrease in speed will be a third. 3%
increase in area will give 3/3 = 1% decrease in speed.