You could do a "Hull drag" test with the help of
a friend and a second boat. You will need a "good"
knotmeter(0~10 Kt ? ) and a calibrated scale (0~100lbs. maybe
150 lbs the kind with hooks on both ends). The idea
is to measure the pounds of "pull" (on tow line)at
increasing speeds. Like 4kts. 25lbs, 5kts. 32lbs, and so on.
Then if you want to calcualte the power your hull is
dissipating (power your going to need also) then multiply the
speed (in knots) times the drag (in pounds) times
0.003068 (corrects for differences in units). Collect as
many data point as you can and make the "runs" inboth
directions to lower the errors.(wind~current)<br>Have
fun<br>Joe<br>ECB