Now THAT'S a great explanation, AL. Thanks.
I now remember him mentioning the circular motion - and that makes perfect sense the way you explain it.
This was my favorite line of yours (with a bit of embellishment by me):
Quote:
Originally Posted by AdamLein
When the waves breaks on your transom, all of that energy is converted into heat, sound, deformation....and soiled foulies.
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So now that you've explained the sub-surface velocity in a breaking wave - what do you think about the issue of potential rudder damage using the JSD...that is the boat being essentially held in place stern-on by the drogue as the energy of the water moves past the rudder? From a physics perspective is rudder damage more likely with this orientation than bow-on?
A couple of other questions:
1. In actual surfing, in other words where you're on your board riding all the way into the beach - I assume you're NOT riding the SAME group of particles, but actually the "slope" of the wave made up by progressive "groups" as the sine wave moves. In other words - it becomes gravity, not "forward motion" or continuous "velocity" of the wave...is that right?
2. I think I understand the potential energy of the breaking water - that is the group velocity multiplied by the gravity and lack of resistance you mention. So I assume that the breaking water is both falling and essentially "surfing" as well - just at a much higher velocity than the boat. Is this right? If so - why is does it have so much more velocity and power?
Thanks for taking the time.