| Name: |
CAT BOAT
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/6/2008 6:31:56 PM
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Video on Lake Ponchartrain. The lake was very smooth the day of the Tickfaw 200. That is the only way I got to run with these guys. Video shot around Madisonville, La. The blue Skater belongs to a guy named A.J., and Mark Boos (Precision Marine) was driving. The video was shot from an MTI Cat called "Spine Tingler". Me and Dee Dee driving ours. Was way fun . "Bling it on"
URL: Whar'd he come from
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| Name: |
Chevy4x4
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/6/2008 8:38:03 PM
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not sure what the MTI is packing, but you smoked him in that vid.
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| Name: |
Feb
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/6/2008 9:39:19 PM
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Was that with or without mufflers? It had my computer shaking. LOL
Awesome - Thanks for sharing.
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| Name: |
LifeTime Laker
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/6/2008 10:25:28 PM
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Thats one quick CAT.
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| Name: |
Summer Lover
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/6/2008 11:02:22 PM
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Now we know why we have the boat ban on the home field, did you see the horrendous wake caused by these boats? Come to think about it, neither did I. I did however make a run on LM to The Rock from Sandy Creek Sunday, and even with the small number of boats out that day, the wake was as expected – the puppy and the wife were complaining about getting bounced around. I will be forced by threat of bodily harm to operate the boat as a displacement hull, sorry about the wake guys, but at least we won’t have nearly as many of those assault boats to worry about..
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On the other forum you said that waves loose amplitude the further away from the source they get. So with so few boats, yet the water still too rough to comfortable, what casued the rough water? Could it be those same few waves being bounced around? NAH. All those proffessors and scientest I saw on TV just made it up.
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| Name: |
Summer Lover
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| Subject: |
But wait
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Date:
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5/7/2008 11:15:08 AM
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And I still maintain the view that waves do dissipate, else we would not have the glass smooth water in the morning. My point was that the larger/faster boats were not/are not the primary cause of wave action, that the number of boats has a far greater impact.
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| Name: |
DJ
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| Subject: |
But wait
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Date:
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5/7/2008 12:23:26 PM
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Wind also has a very big part in waves, I've been on our lake with almost no boats and there were four footers, not a fun time since the old boat I was in sheared the prop pin and we were being towed back to the dock.
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| Name: |
Summer Lover
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| Subject: |
But wait
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Date:
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5/7/2008 1:55:59 PM
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You are correct of course, Saturday morning, the boat traffic was zero in the slough, but waves were running about 1 1/2'.
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You act as if I said that waves last forever. I NEVER SAID THAT!! I said they are the closest thing to perpetual motion to be found on Earth. I have also stated SEVERAL times that many factors work to diminish the energy within the waves. Seawalls and land being the number one factor. I said SOME of the energy is reflected, not ALL. I also stated that the rip rap that is now required at the bottom of new seawalls is to help dissapate the energy.
Next time pay closer attention to what you read instead of jumping on bandwagons of folks who have an agenda.
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| Name: |
Summer Lover
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| Subject: |
But wait
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Date:
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5/7/2008 5:13:17 PM
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If a wave is generated in the back of a slough and radiates towards the big water; with no outside forces (such as wind, boats, shore, seawalls, etc) acting upon it, what would the omniscient person say the duration (distance) would be, and wouldn't frequency and amplitude have to be decreased near the end?
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| Name: |
LifeTime Laker
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| Subject: |
I'll tell you what....
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Date:
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5/8/2008 9:35:55 AM
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You go and find out for yourself. I am not going to argue the point ANY further. I know that what I have posted is correct. If you go back and look at the thread where PP reposted his and my original post, you will find a link posted ALSCN that back up everything I have posted. If you google waves, and especailly rouge waves, you will find thousands of documents to answer all your questions. I am not the expert, but I have seen the research done BY EXPERTS. I will jsut sit back and wait till you have educated yourself a little. Then maybe we can revisit the issue. Yea right, thats gonna happen....lol. <sarcasm OFF>
Knowledge is a wonderful thing, try it sometime.
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| Name: |
MartiniMan
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 9:58:27 AM
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Answer to your question about dissipation of wave amplitude. The amplitude of a wave is directly proportional to the energy that created it. As the wave migrates from the point of creation (known as propagation) it diminishes in amplitude as a result of several factors. The biggest factor is dispersion. The same energy is dispersed over a larger area as it propagates. Dispersion also caused when the wave impacts the shore (along with a certain amount of absorption of the energy). Rip rap is extremely effective because it disperses the available energy in multiple directions and when two waves of equal amplitude but opposite phase hit each other the energy is cancelled. If it hits a concrete sidewall some of the energy is absorbed but most is reflected and the amplitude is not reduced as much. Friction also occurs with water although it is usually a small factor when compared to the overall energy of a wave.
The fact is if you measured the amplitude of a wave propagating from the back of a boat it will diminish as it moves but the reduction would not be noticeable over short distances. So in a slough there would be minimal loss of amplitude from dispersion from the spreading of the wave and friction and most of the energy makes it to shore. A boat making a big wave on one side of an open area of the lake will not have as much impact because of the reduction in amplitude over a greater distance.
Finally, a M.Sc. in Geophysics paying off! By the way, lest you wonder about a tsunami traveling across the Ocean these same factors are in play. What is different is that the amount of energy created by the movement of a 10,000 foot column of water is amazing. Not a big deal when that energy is spread out over the 10,000 feet (only enough to make a surface wave of 6 inches) but when all that energy is piled up in shallow water it becomes a 10, 20, 30 meter pile of water moving at high speed.
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| Name: |
LifeTime Laker
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 10:19:18 AM
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Ok, so now tell me how this differs from anything I have said?
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| Name: |
MartiniMan
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 10:20:56 AM
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Probably doesn't. I was responding to the question about whether waves diminish in amplitude.
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| Name: |
LifeTime Laker
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 10:28:35 AM
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It's been a LONG time since my high school physics and I never took it at college level so I have a question for you. What is the correlation between amplitude and energy? Is the amount of energy contained in the wave decreased with amplitude or is it just spread over a wider band?
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| Name: |
MartiniMan
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 11:21:03 AM
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Generally speaking the greater the energy the greater the amplitude. For a boat the energy is created by the initial displacement of the water by the hull (potential energy) and then the return of the displaced water to the hole created by the hull (kinetic energy). That's why slower boats create bigger waves, because of the greater displacement. As the wave propagates the same amount energy is spread out over a larger area so the amplitude will be reduced. There is some transfer of energy to friction but very little so for all practical purposes the amount of energy is that same until it hits something. Knocking off the cobwebs you will remember conservation of energy, neither created nor destroyed but just transferred. Clear as mud?
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| Name: |
LifeTime Laker
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 12:09:17 PM
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Clear as murky mud....lol. Tha is pretty much what I thought from what I have read and seen, but TV documentaries generally steer clear of to much techspeek.
I remember seeing once where there is a 'school of thought' in acedemia that believes that all sound waves ever created still exist. They postulated that with the proper 'reciever' one could catch these sound waves and actually listen to every sound ever made on the planet. I remember thinking how cool would it be to be able to capture the actual voices from such events as the Founding Fathers debating the wording of the Declaration of Independence, and the Constitution. I decided I would just wait till get my first time travel machine and go back and observe first hand....lol.
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| Name: |
jalcz
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| Subject: |
Wave dissipation
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Date:
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5/8/2008 12:15:21 PM
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"As the wave propagates the same amount energy is spread out over a larger area so the amplitude will be reduced. There is some transfer of energy to friction but very little so for all practical purposes the amount of energy is that same until it hits something."
Do these two statements contradict each other?
Or, to bring a "bottom line" to this argument: does a wave get smaller as it travels, or is the wake thrown by a boat the same size when it gets to shore a mile later, assuming nothing interferes with it?
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| Name: |
CAT BOAT
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| Subject: |
Wait a dang minute.....
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Date:
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5/8/2008 10:13:53 PM
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I started this thread, and I will not sit here at see yall trash it... I posted a video link of us at the swamp, and yall (you too LTL, I'll come up there and whip your butt.) turn it into a wave amplitude, or whatever arguement. Just watch the video and leave my thread alone. DON'T make me come and whip all of yall. Just watch the video. "Bling it On"
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| Name: |
Lakeman
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 5:26:38 AM
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I bow to the Cat. LOL.
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| Name: |
DJ
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 8:17:28 AM
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The Cat is King, you and he should control the new BO'S organization that the HOBO’S Agreed we need, I'll send the first membership fee in give me a fax number and I'll fax the cash ASAP.
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| Name: |
cg
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 8:31:47 AM
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LMAO.....bling on the BO's....lol
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| Name: |
Summer Lover
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 9:16:34 AM
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Sorry CAT, enjoyed the video - and understand why they stopped filming so quickly. Standing down.
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| Name: |
CAT BOAT
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 9:36:48 AM
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lol, Yall kill me.
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| Name: |
LifeTime Laker
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 9:50:07 AM
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Is that what the term 'high speed' video refers too?
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| Name: |
Summer Lover
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| Subject: |
Wait a dang minute.....
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Date:
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5/9/2008 1:22:01 PM
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Actually, it is a matter of perspective - from the back - yes high speed video, from the CAT's eye view - slow speed.
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| Name: |
waterbaby
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| Subject: |
Cat huntin' in the swamp...
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Date:
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5/13/2008 7:56:54 AM
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Cool video CAT. Post more if you have time! I'll remember to turn the volume down next time. It woke the baby.
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