What's the go for driving through bulldust?
Submitted: Monday, Apr 06, 2009 at 19:59
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Anthony (Vic)
A question for the luck (unlucky) one to driven through bulldust ...
I was reading Mick O Vic's blog on travelling along the Donohue Hwy heading west from
Boulia, with some heavy patches of bulldust, up to 60-70cm deep.
I was interested to find out what the issues are driving through bulldust that deep. I would think that the radiator would clog up a big ?,or is the dust soooo fine that it passes straight through the fins?
I would think that slow and steady is the go but does the bulldust slow the 4wd down much ?
Interested to hear from those in the know ...
cheers Anthony
Reply By: Rockape - Monday, Apr 06, 2009 at 20:21
Monday, Apr 06, 2009 at 20:21
Anthony,
your biggest worry is what is under the, always large potholes or severe corrugation's, nothing worse than coming over a
hill and finding a sharp bend or narrow
bridge, you try to wash off speed but all you do is bounce over the tops of the unseen corrugation's.
In my book slow and steady wins the race, also the dust is very, very fine.
Have a good one
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358453
Follow Up By: Anthony (Vic) - Monday, Apr 06, 2009 at 20:45
Monday, Apr 06, 2009 at 20:45
Rockape, I could just imagine that a hole or large stones sitting under the bulldust, waiting to greet a tyre and rim.
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Reply By: Kim and Damn Dog - Monday, Apr 06, 2009 at 21:31
Monday, Apr 06, 2009 at 21:31
Anthony
Bull dust holes have all sorts of configurations, so no single rule applies.
A long shallow hole requires some measure of momentum, and the car can be thrown around a bit.
The worse ones in my view are the deep buggars, which may only be 20-50m long. The first thing that happens is a compete obliteration of view. All of a sudden you won’t be able to see anything for a number of seconds.
Some of them have what I call Bull Dust Cliffs. This is where the dust bowl meets solid ground again.
Sometimes they can be up to 12” high and you can imagine what happens to the front
suspension when these are hit at any speed.
The last one I came across was on Halligans Track back in 2002 and I finished up losing a tooth.
Regards
Kim
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Follow Up By: Anthony (Vic) - Tuesday, Apr 07, 2009 at 13:06
Tuesday, Apr 07, 2009 at 13:06
Thanks Kim, it sounds like if a can avoid bulldust I should, ... you just don't what's under it until you hit it.
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Reply By: Crackles - Monday, Apr 06, 2009 at 22:35
Monday, Apr 06, 2009 at 22:35
Just like you can't see how deep a bog hole is, you can't tell what's under bulldust either so one needs to slow down to avoid dust coming over the window or rolling the vehicle in ruts. Deep holes like below can usually be tackled in 2nd gear. I haven't found the radiator to blockup despite many km's of roads like this but the main concern is obviously the air cleaner. A cyclonic pre cleaner on the
snorkel is a good investment if often doing this type of track. One finds on higher speed roads like the
Plenty Highway that short deep bulldust holes form in
places up to 500 deep & feels like the
suspension is going to be torn off the car when you take a chance & don't slow down.
Cheers Craig................
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Follow Up By: Anthony (Vic) - Tuesday, Apr 07, 2009 at 13:12
Tuesday, Apr 07, 2009 at 13:12
Thanks Craig, ... you answered my concern with the radiator. I would hate to clog the fins and overheat in the middle of no where. The pre cleaner on the
snorkel is a good suggestion ... I
check them out.
Cheers Anthony
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Reply By: P7OFFROAD Accredited Driver Training - Tuesday, Apr 07, 2009 at 06:02
Tuesday, Apr 07, 2009 at 06:02
momentum gets you into trouble.
Torque drives you through it.
sooo, slow down and be in a strong torque range.
as everyone has said, teh bull dust itself is not a major obstacle, but it does a great job of hiding other ones,
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Follow Up By: Anthony (Vic) - Tuesday, Apr 07, 2009 at 13:18
Tuesday, Apr 07, 2009 at 13:18
P7, ... less speed ... less hast ... thanks
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Reply By: Member - Oldplodder (QLD) - Tuesday, Apr 07, 2009 at 08:10
Tuesday, Apr 07, 2009 at 08:10
Good replies above.
Worst I have seen is on the Plenty, most probably the same Georgina River clay as the Donohue.
It is fine, if not finer than talcum powder.
First small patch we hit a bit fast (50km/hr) and it was like water, went over the car (
grey out) and tricked down the outside of the windows. Kids thought it was great.
Up to then had only seen small patches on roads.
It was as deep as the bottom of the bull bar in
places.
Dropped down to 1st gear and took it careful after that.
Patches over 50m across, and potholes in the bottom.
Friend decided to go around it. He kept going left and ended up where he started! Drove through it in the end.
Pushing through, it feels lighter than water.
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Follow Up By: Anthony (Vic) - Tuesday, Apr 07, 2009 at 13:23
Tuesday, Apr 07, 2009 at 13:23
We did the Plenty & Donohue in Dec '07 and were lucky with no bulldust. The camper was still full of dust by
Boulia. The laptop case was road dust colour!
I could imagine how much the bulldust would get into the camper. Hilary would really love that ... not.
Thanks
John for the tips - cheers Anthony
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Reply By: Member -Dodger - Tuesday, Apr 07, 2009 at 14:51
Tuesday, Apr 07, 2009 at 14:51
When we did the
Plenty Highway last it was a corrugated mess with lots of bulldust holes. They were mustering in the district so there were many stock road trains also. We were towing the van pictured below so each bulldust hole was treated with a GREAT deal of respect even to engaging low range on one very deep hole that covered the entire road for nearly 500mtrs. It was akin to driving thru deep water. Had the air on recycle and air con on.
We had no trouble and when we camped near Jervoise station made sure I shook both van and Nissan before setting up
camp. This was done by giving each end a violent shove and then running very quickly out of range from the dust.
At other times I have crossed the Plenty without a problem as it has been a good gravell road after grading.
Oh and make sure that you reduce all tyre pressures and travell slowly, after all you are a long time dead.
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Follow Up By: Anthony (Vic) - Tuesday, Apr 07, 2009 at 18:02
Tuesday, Apr 07, 2009 at 18:02
Yes, I'm a believer in reduced tyre pressures. Thanks Dodger.
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