Big Red has nothing on the Dakar

Submitted: Saturday, Jan 23, 2010 at 23:29
ThreadID: 75436 Views:3133 Replies:6 FollowUps:9
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Just been browsing through the Dakar website and came across this photo of the sand dunes they were driving across.
Not for this black duck.

Some sandhill

Dave
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Reply By: Member - John - Saturday, Jan 23, 2010 at 23:36

Saturday, Jan 23, 2010 at 23:36
imagine going up it, LOL
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Reply By: Member - Fred B (NT) - Saturday, Jan 23, 2010 at 23:58

Saturday, Jan 23, 2010 at 23:58
Hey Guys,
I think you have been sucked in... have a look at the angle of the helicopter in the original photo, and then look at the one I have adjusted below. Which one do you think is the more likely attitude of the helicopter? Mind you, the dunes are still pretty big, but the first one (in my opinion) is definitely not the truth. A very good award winning photo though...

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Follow Up By: Dave B ( BHQ NSW) - Sunday, Jan 24, 2010 at 00:05

Sunday, Jan 24, 2010 at 00:05
Fred, I reckon you would need a skyhook to get up that dune if your adjusted photo was right.

Dave
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Follow Up By: Member - Fred B (NT) - Sunday, Jan 24, 2010 at 00:40

Sunday, Jan 24, 2010 at 00:40
OK, so I have overdone the alteration... but the 1st one is just not possible, even going down it. At top left (1st pic) the car would be travelling on a 45 degree angle on the side of the top of the dune, before turning right to drop down the slope. Just have a good look at the dust and the wheel tracks at the top. My adjustment shows them traveling (flat) along atrack between two crests before going over... Mine is still closer to the truth.... the 1st is great photography...
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Follow Up By: Member - Doug T (NT) - Sunday, Jan 24, 2010 at 02:05

Sunday, Jan 24, 2010 at 02:05
Fred

Yes, I'm with you on that, with Computer software it's just too easy to make photo's look bigger, or worse or higher than they really are .

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Like this


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Follow Up By: Member - Graham H (QLD) - Sunday, Jan 24, 2010 at 10:28

Sunday, Jan 24, 2010 at 10:28
I reckon you could rotate it anticlockwise till the corner was under the D in

Dakar and then the valley floor would be level as it probably is.

Would be interested to see what it would look like

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Follow Up By: Tonyfish#58 - Sunday, Jan 24, 2010 at 11:58

Sunday, Jan 24, 2010 at 11:58
Yep - Sucked in - They were also going the other direction :-)



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Reply By: CJ - Sunday, Jan 24, 2010 at 10:10

Sunday, Jan 24, 2010 at 10:10
Phoshopped.

The specific properties of sand simply does not allow a steepness greater than a certain degree, perhaps add 1 oto 4 degrees for the influence of the prevailing wind...

But this is way way more. It can't be sand

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Follow Up By: Geoff (Newcastle, NSW) - Sunday, Jan 24, 2010 at 10:44

Sunday, Jan 24, 2010 at 10:44
It's called the "Angle of Repose" for sand have a look in this table: Angle of Repose

Geoff

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Follow Up By: Geoff (Newcastle, NSW) - Sunday, Jan 24, 2010 at 10:51

Sunday, Jan 24, 2010 at 10:51
I should have added it's measured this way:



Geoff

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Follow Up By: Dave B ( BHQ NSW) - Sunday, Jan 24, 2010 at 10:51

Sunday, Jan 24, 2010 at 10:51
CJ, I probably used a misnomer in saying it was a sandhill.

When you have a look at the tyre tracks it doesn't look like it is the typical sandhill. The tyre tracks look somewhat compacted.

I have not been to the Andes, so cannot substantiate the photo, but have watched each episode of the Dakar highlights on SBS, and the terrain was just mindboggling.

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Follow Up By: The Explorer - Sunday, Jan 24, 2010 at 11:25

Sunday, Jan 24, 2010 at 11:25
Yes - its not a sandhill, plus Big Red isnt actually that big (as far as sandhills go) anyway so not the best comparison in the first instance. All good fun though.

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Reply By: Member - Graham H (QLD) - Sunday, Jan 24, 2010 at 12:17

Sunday, Jan 24, 2010 at 12:17
How about these two with the valley floor flatter as it probably would be.

The helicopter is probably climbing anyway.

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Reply By: Bonz (Vic) - Sunday, Jan 24, 2010 at 14:00

Sunday, Jan 24, 2010 at 14:00
Some if the hills the OBC guys drive down are awesome, this one looks huge, altered or not its still a big hill
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Reply By: Member - Campergirl (NSW) - Monday, Jan 25, 2010 at 09:24

Monday, Jan 25, 2010 at 09:24
Oh you people that doubt! Funny

Bruce Garland and the boys came back to Oz on Friday. I showed Bruce this pic last night and yes "IT WAS THAT BIG AND STEEP". He and Harry said it was the steepest sand decent they have ever encountered and even they were "S*&^ing" themselves!

There was another way around but you had to travel a fair way out then back again to make the waypoint. Apparently only the really brave (or silly) had a go.

All I can say is I'm glad it was them and not me.


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