what creates corragations
Submitted: Monday, May 31, 2010 at 20:25
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Member - Johny boy (NSW)
Hi all I'm sitting at a C/P in geralton and we are talking about road conditions on the
Gibb river rd ,and are worried about the corrugations,which is what brought up this question of what creates them and how do you best deal with them ,I'm still not sure if I want to tow my Windsor rapid. yet I'm not sure if I want to leave it parked up somewhere,but that's a whole other thread.
I'm going to sit by the laptop and wait for some info so please drop us a line .
Cheers.
Reply By: Member - Barnesy SA - Tuesday, Jun 01, 2010 at 12:04
Tuesday, Jun 01, 2010 at 12:04
There are links on the internet about this.
Basically the theory is that it begins with natural small indents in the dirt road and as the wheel drops into it it deepens the corrugation. As the wheel then rebounds it creates the rise. As the wheel drops again it creates the next indent. This continues on and on.
They're worsened by high tyre pressures, 2wd and high speeds creating wheel spin when the drive wheel is momentarily in the air and ripping into the crest of the corrugation when the drive wheel lands again.
Ways to make driving better:
reduce tyre pressure about 20%
use high range 4wd, NOT 2wd
slow down a bit, it's not a race
do your slowing down before a corner and slowly accelerate through corners allowing the front wheels to pull you in the right direction
make sure you have good shockers and take a spare for front and rear
AnswerID:
419088
Reply By: Matt M - Tuesday, Jun 01, 2010 at 14:56
Tuesday, Jun 01, 2010 at 14:56
Corregations are the natural state of the road....flat is not natural and all road surfaces are on a constant evolution back to corregations.
Look at desert sands...corregated...look at the ocean floor...corregated.
Drive on the Hume Hwy into
Sydney...the concrete sections are corregated just at a lowert fequency of dirt. Ie the harder the surface the lower the Freq of the waves and the longer it takes to form them.
Dr Karl has written a few articles on the subject...Google him.
Matt.
AnswerID:
419109
Reply By: Tonyfish#58 - Tuesday, Jun 01, 2010 at 17:44
Tuesday, Jun 01, 2010 at 17:44
Any road surface without sufficient binder will corrugate. Vehicle speed, Tyre pressures, driver styles all combine to determine the severity.
Roads that are never maintained, do not have binder material occurring naturally and a wet season to aid in compaction are corrugations
mine fields :-)
We have tried to repair sandy sections of road in the cape (that always corrugated) by mixing with imported gravel, failure was always a matter of time once the binder was worn from the surface.
The only way to fix these roads is to form from local material and sheet in a good roadbase.
;-) Now the locals way to beat it is to be the fastest on the road so your ride on top of the corrugations :-) The tourist way is as slow as you need to go to not shake your teeth out.
Cheers Tony
AnswerID:
419145