linesiderdemdnj

How do those bumpy ruts form?

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Hi all

 

question - how do those horrendous bumps form in the ruts at AI?  I am almost certain it is from people leaving traction control on.  Just wondering if anyone knows for sure. Thanks. 

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I have always thought it was from lazy pricks not airing down, coupled with

" I dont have to air down, or for that matter, use 4 wheel drive, watch this"

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Short answer = physics :howdy:

 

Long answer:

 

Some experts who maintain dirt roads say that your car's suspension system causes the problem as it actually tries to smooth out the bumps in the road [source: U.S. Forest Service]. As a wheel moves over a bump, the suspension system absorbs the shock and then pushes back against the road surface. On a soft surface like a dirt road, the push back either packs or displaces the dirt it hits. Over time, as more and more cars go over the bump, the washboard pattern develops.

 

However, in the summer of 2009, physicists from Canada, France and the United Kingdom published a new study about the physics of washboard road formation. They discovered that ripples will form, even when the springy suspension of a car and the rolling shape of a wheel are eliminated [source: American Physical Society].

 

They built an experimental vehicle, replacing the wheel with a suspension rolling over a road with a simple inclined plow blade, without any spring or suspension, dragging over a bed of dry sand. Ripples appear when the plow moves above a certain speed.

 

After observing the results, they compared this phenomenon to the physics of stone skipping: A stone needs to be thrown above a specific speed in order to have enough force to bounce of the surface. A wash boarding plow is similar, except the sandy surface remembers its shape and the effect is amplified.

 

They concluded that the formation of a washboard pattern is inevitable. The ridges will form, even if the wheel diameter, suspension or surface is changed. The only way to avoid the effects of a washboard road is to stay below a certain speed, but that's impractical: you'd usually have to drive at 3 miles per hour (4.83 kilometers per hour) to eliminate the problem altogether.

 

Some day, such discoveries may lead to improved suspension systems or improved road surfaces that smooth out a bumpy ride. In the meantime, there's not much you can do about washboard road except brace yourself, watch your speed and hang on for the ride.

 

https://adventure.howstuffworks.com/outdoor-activities/ranch-life/what-causes-washboard-roads.htm

 

 

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the worse is when you get a stretch of ruts where the horses walk down the tracks, talk about rattling your teeth out... 

 

Nice SW or NW blow seems to fill them in nicely, and rain.

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Once you leave the ruts for fresh tracks, they start again.. lol 

And all the beer is flat after 5 miles..

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1 hour ago, luckyOC said:

the worse is when you get a stretch of ruts where the horses walk down the tracks, talk about rattling your teeth out... 

 

Nice SW or NW blow seems to fill them in nicely, and rain.

Looks like Saturday night - Sunday should do the trick.

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oh, over-wash trumps it all....  at this point i bet its all nice and smooth in most places.

its so nice to be the first fracks down the beach, well other than the rangers meandering all over the beach....

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4 hours ago, luckyOC said:

 well other than the rangers meandering all over the beach....

I have more issues with the "research" SUV. They have no issues driving between rods and vehicles with no regard for children or pets that may dart out. Apparently they are used to being flipped off as well. Never a problem with rangers at all.

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Many surfcasters have asked this same question over the years but none has been able to find the truth. 
 

Some have thought it was ignorant folks not airing down or leaving the dreaded traction control on…

 

others have opined that physics was to blame… 

 

And yet we still do not know the true answer

 

could it be horses or birds? Neigh. Not likely. 
 

please tell us when you have come to a reasonable conclusion :)

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3 hours ago, AI GUY said:

I have more issues with the "research" SUV. They have no issues driving between rods and vehicles with no regard for children or pets that may dart out. Apparently they are used to being flipped off as well. Never a problem with rangers at all.

Is that a white expedition by any chance?  A group of people, looked to be in their 70s, were driving by and stood around me while I was reeling in a fish, to “make sure I released it”. My buddy told me they said that after I released the fish and they left. Thought that was absolutely ridiculous. 

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1 hour ago, judahL said:

Many surfcasters have asked this same question over the years but none has been able to find the truth. 
 

Some have thought it was ignorant folks not airing down or leaving the dreaded traction control on…

 

others have opined that physics was to blame… 

 

And yet we still do not know the true answer

 

could it be horses or birds? Neigh. Not likely. 
 

please tell us when you have come to a reasonable conclusion :)

The reasoning behind traction control is because the tires are slipping while driving thru sand and the computer wants to slow the wheels down and they might hesitate when trying to slow down, without being able to stop them well enough because of being in sand, making them stutter, and create the bumps. The physics thing is probably the real reason. 

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55 mins ago, linesiderdemdnj said:

Is that a white expedition by any chance?  A group of people, looked to be in their 70s, were driving by and stood around me while I was reeling in a fish, to “make sure I released it”. My buddy told me they said that after I released the fish and they left. Thought that was absolutely ridiculous. 

That's them. I'd be curious to see what the actual description is for that job and the amount of the budget allotted for it.

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