As I thought about what the paravane should look like so it would stay near the surface and off to one side I realized that it should look very much like my boy Amoni's toy sailboat. So I explained to him that I could figure out better how big my paravane should be if I did some tests with his sailboat with the sail off and he agreed. I put on 3 strings tied together and will do a long string from that to the scale (in Teryn's hand). The strings should hold the boat at the right angle, like strings to a kite. If we can walk at 3, 4, or 5 MPH we can see how much the boat will pull on the string. Then I can have some idea what size the paravane should be. Plan is to head to the dock after school gets out.
We put the model in the water and measured 3 to 6 lbs force on the string with probably 3 or 4 MPH. It works!
You can see more pictures.