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Join Date: Aug 2006
02-08-2007, 4:55 PM
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Check out the latest way to surf. http://www.break.com/index/dynamite_surfing.html Hey Ed, Do you think they would allow this on the Scioto River?
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Join Date: May 2005
02-08-2007, 4:57 PM
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That video is unbelievable. I woudn't want to know what the blast did to the fish or neighbors.
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Join Date: Aug 2004
02-08-2007, 6:40 PM
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That was sick!
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02-08-2007, 6:56 PM
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That's so crazy - Dennis, will you call out that wave for me?
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Join Date: Feb 2005
02-08-2007, 6:58 PM
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This is my second year planning Wakefest, a lot of things are going together so much easier now that I've done it once. Meeting city requirements however, is still challenging. I want to tell the city that wakefest is really cool so the city should let us do A, B, and C, but it's not that simple. I should put in explosive ordnance in my event plan to see if they pick up on it. I saw that post on the wakeboard forum. Early in the clip they show three sticks taped together. Wikipedia says that a typical stick is 8 inches by 1 inch, another common size is 2 by 16 inches. Those sticks looked larger than 1X8. I found references for the weight of a 2X16 stick ranging from 1.5 to 2.5 pounds each. That not too much to throw, the lighter 1.5 pound stick might float, the heavier 2.5 stick should sink. A deep sinking charge should make a bigger wave, right? Hmmm, I better stop spending so much time looking in to this, might end up on a watch list. I'd love to see myth busters test the concept.
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Join Date: May 2005
02-08-2007, 7:18 PM
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Jeff, When you hear the boom start paddling. Simple
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Join Date: Feb 2005
02-09-2007, 9:42 AM
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If we could just send surf boards to Iraq then they might use up their car bomb and IED ordnance on surfing. Doesn't Land locked surfing make the world a better palace, that's all I'm trying to say.
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Join Date: Nov 2004
02-09-2007, 4:24 PM
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Holy crap that was incredible...who come up with this stuff?
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Join Date: Feb 2005
02-09-2007, 4:27 PM
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The children of coal miners?
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Join Date: Jul 2006
02-10-2007, 5:44 AM
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Bad as hell!
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02-10-2007, 6:07 AM
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Did anyone read the comments on the site? That the video is fake, the water is only 1.5 m deep and was created for Quiksilver's fashion week? I still love the concept even if it turns out to be nonsense. Is it possible to create a wave through an explosion like that? Does anyone have any ordinace experience?
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Join Date: Feb 2005
02-10-2007, 6:52 AM
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There's a Navy explosive shock test, they basically mount equipment on a barge and detonate an under water charge. I haven't personally witnessed this test. The explosive charge is pretty big and really rocks the barge, I bet that would be a big enough explosion to create a wave. It would suck if you didn't catch the wave, you'd have to plant and set off another charge. These people might know: http://www.algor.com/news_pub/cust_app/Huber_DDAM/default.asp Read the first paragraph to get a feel for the shock test, also see the photograph. Or these guys might know, the Brits are supposed to be pretty good with explosives: http://www.marine.gov.uk/explosive_shock_test.htm All of the photos show a pretty good vertical plume but no wave. I think if you took the picture after the plume fell then you might have a wave. Would that wave be big enough to ride and would it have a lip like the video I don’t know.
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Join Date: Aug 2005
02-11-2007, 6:13 AM
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video is simply fake, computer composition for QS advertizing and trying this for real is stupid in 2 ways - extremly dangerous to you and for sure you kill everything under water. Ask Surfrider foundation what they think :/
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Join Date: Feb 2005
02-11-2007, 6:21 AM
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But what if you did it in the Dead Sea? I absolutely agree with you, this is far too dangerous to attempt. I'll I need is a boat to surf, that's much safer.
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02-11-2007, 6:30 AM
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I think we all argee it's a dangerous concept, but I was intriqued with the potential of the force. We normally push DOWN with weighted boats, but if the wave could be created with a force going UP and OUT - I may be totally off base, but it seems that the force from the explosion was in a different - what is direction the correct term? There is that one surfpark that I think Alan Bogdanoff asked about where the wave is created by dragging a wave shaped device through the water. Ed, you're the engineering genius, is ballasting a boat seriously inefficent? Is it possible to form a s'wake that is larger, longer and better formed that doesn't rely on the shape of the hull that was designed principally to minimize wake height?
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Join Date: Feb 2005
02-11-2007, 3:24 PM
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That’s a really complex problem and a little out of my field, but I’ll make a few conjectures anyway. I don’t think an explosion would be especially efficient, sure you don’t have to move a tow boat, but you might have to move a lot more water than you would with a boat. You're also moving water with a compressible gas, that makes the problem difficult. A poorly placed charge might send a lot of the force up, not out. The energy for the explosion would decrease with the radius, I think decreasing as the square of the radius. Unless you had a very specially shaped bottom surface wave would dissipate fairly quickly There are a series of small controlled explosions in each cylinder of your engine, you use that energy to propel your boat, and IC engines are a fairly efficient way to move your boat and generate a surfing wake. The level and energy of that wave is very consistent, relatively easy to make, and safe. I think those amusement park surf set ups may be more efficient. In these setups a sheet of water is pumped over a fixed wave form. I’d say that an 8 to 12 foot wide form would be the minimum width for an interesting ride. So you’d need to know how much energy it takes to push a sheet of water of the form then compare that energy demand to the power required by a surf wake generating boat. Free is best. Ocean waves have huge push, generated over miles and miles, and don’t cost a dime. My problem is that the ocean is too far away. Event with global warming I don’t expect to live near a surfable ocean wave anytime soon.
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Join Date: Aug 2005
02-11-2007, 3:26 PM
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Next adepts for Darwin prize --- Yea that wave created by dragging shape is some idea from www.waveloch.com/flash/index.htm called Moving Reef. Concept of creating sleek barrel wave with serial blasts of huge water guns www.vagabondsurf.com/WaveCannons.html http://www.popsci.com/popsci/bown/2003/article/0,18881,537103,00.html and look what new at Florida Ron Jons http://www.twsbiz.com/twbiz/features/article/0,21214,1572522,00.html
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Join Date: Aug 2005
02-11-2007, 3:47 PM
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Surf park from Florida is probably most energy saving system - Versa Reef http://www.aquaticgroup.com/media/pdf/WaveTek%20Surf%20Pools.pdf
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Join Date: Nov 2004
02-11-2007, 3:51 PM
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Holy crap that is freaking awesome.
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