laidbackdood wrote: With my diagram above......the knot on the left.......I will draw another analogy....... when swimming freestyle and you need to take a breath......if you turn your head back.....there is always a pocket of air there because your head creates a bit of a break........there is no need to lift your head out of the water because that pocket is always there.........i think those ridges act a bit like that.......the knot is not steamlined...smooth like a torpedo for less resistance.......the ridges create some resistance and the pockets are always there..........only way would be to test one long pr against a long PR coated with knot sense(smooth as) and watch. |
fish i wrote: It's actually real simple. No, it isn't. Your post was though. No need for a scientific explanation here starship enterprise. Some people actually want to learn, some even want to understand, and some can't do either, so mock both. Dive down 20m. Wave your arm around. No bubbles. Kick your fins. Hmmm no bubbles. Get someone to drop a jig and crank it up. No bubbles Correct, and none would be expected. Your point is ? The snakes/bubble theory was spouted about a decade ago by someone on this very forum who really didn't think about what they were saying. Impressive memory. You know they didn't think about it - how ? Now there are still people believing it, without thinking for them selves. People are discussing it, and thinking about the different responses. Like adults. My neighbour still thinks the earth is flat. It's quite entertaining listening to his explanations and answers to my questions. Perhaps one to many St Pedro's special teas. Run the subject of cavitation or PR/FG knots past him - that's what this thread is about. My surfboard fins form cavitation... No they don't. ...and a mean bubble off the trailing edge. Due to bubble entrapment similar to the venturi effect. Especially when not sanded blunt. Ever wondered why ? They are near the surface. Air is near the surface. Well spotted. Actually, air is on the surface. Everywhere. Fortunately. From Dr Titahi's post "The effects of cavitation are especially important near the surface of the ocean, where the ambient water pressure is relatively low and cavitation is more likely to occur"" Now you're a Doctor Jason I'd go for a pay rise. Tell them Fish-i OK'ed it. And Mike, up there for thinking, down there for dancing +) Mike knows. Let me rephrase that. MIKE knows. Get out there guys. Good advice Dose of sunshine and saltwater needed here. Helps the fishing, and the thinking, and the dancing. Oh and Smudge, looked up the definition of trawling troll. I tried too as well. Even Google was confused. Scary thought though - a troll who trawls. Think you may need some reflection on time on here vs time on the brine. I'm sure Smudge will be learning a great deal from this thread. If it wasn't for cavitation, anyone could catch gurnard. Gotta love what you do I guess. Lter You bet. Cya. |
fish i wrote: Oh and Smudge, looked up the definition of trawling troll. Think you may need some reflection on time on here vs time on the brine. Gotta love what you do I guess. Lter |
fish i wrote:
I think for all of us, you should test this swimming theory out under water. |
Tasman and Golden Bay snapper still running hot We are not far away from daylight... Read More >
Variety is the spice of life On one recent trip, the plan was to spend a... Read More >
Fish where the fish are! Catching fish or just going fishing? I tackle this issue... Read More >
Thoughtful tactics required for better fish Over the course of each year the fishing varies,... Read More >