A preview up an upcoming video featuring several hull riders:
Kevin Urban
Roger Proneman Kelly
Bryce Dewees
Orion Shepherd
Kiyofumi Yanagihashi
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Same Day, Two Hemispheres
5 weeks ago
Heavy, Round Bottom Stone Skip Further
From NPR research news...
When skipping a stone across water, most people look for ones that are flat and light. Now, a new study suggests that curvier, heavier stones can also yield impressive skips. And these findings won't just help you improve your game, they could be applied to the real world, like helping make airplanes more efficient.
Ryan Palmer is an applied mathematician at the University of Bristol in the U.K. and co-author of the study, published this month in the Royal Society.
He and his colleague created a model to learn how shape and mass affect the way objects interact with water. They found that, when skipping rocks over a lake, "if you pick something that's slightly heavier, you get something called a super elastic response," Palmer said.
In other words, a heavier object could yield an impressive bounce.
"What happens is, the rock touches down on the water layer, and because it's heavier, it sinks down further and stays in contact for longer," Palmer said. "This increases pressure on that rock, which then increases the force that lifts it out, and you can get an almighty leap in this response."
Now, Palmer admitted that, though you may get a big leap with heavier stones, they won't result in as many skips as with flat ones. The results also depend on the stone's shape, because one that is too heavy may not work.
"So the take home really is, for a heavier rock that might sink, if it is slightly more curved, it may be more likely to skim," he said.
"Since starting on this work it's become even more irresistible to try and skim stones, and particularly just sort of picking the slightly weirder stones," he said. "Ones that aren't necessarily so flat."
From Proneman
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This young UCLA student and hull rider (Arthur) made this little video today at Malibu. I had sold him the 9-8 Simmons some time back. You may remember that it was the one that broke in half one day at Malibu many years ago. I had it fixed but really wasn't riding it much. Arthur loves it and rides it well....He is prone riding it on the first two waves.....the other nice wave is being ridden by Orion on a Terry Topanga board...
I just got the 9-6 back
that had broken in the spring.....guy did a great job and hardly any
weight added and rocker perfect. You have to look close to see that it
was broke. I will message some pics later.
Heading
down to Mexico tomorrow for a couple weeks......Just had a loook at the
surf report and by golly it might be ok down there and here too!
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