Here are the data from the graph on the John Winters website.

"knots" is speed through the water in a dead calm,
a knot is 15% more than a mph
"friction" is hull surface friction resistance
"wave" is hull wave making resistance
"total" is the sum of the two kinds of hull resistance
"hp" is the horsepower needed to sustain that speed at that total resistance

knots: 2 2.6 3 3.5 4 4.6 5 5.5 6
lb friction: 2 2.5 2.75 4 4.75 5 7 8 9
lb wave: 0 0 0 .05 0.75 3 7 15 20
lb total: 2 2.5 2.75 4.5 5.5 8 14 23 29
================================================== =========
hp: .01 .02 .03 .05 .07 .10 .20 .40 .53


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