"Road To Dakar: PT2" December 24 @ 10pm/pt

Part 2 of Robby Gordon "Road To Dakar" airs on December 24th at 10pm/pt (1am on the December 25th calendar for eastern time zone)

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Permalink Reply by alan4s on December 27, 2014 at 3:44pm
My professional life changed drastically once I figured this out. Good thing it happened a long time ago.
Permalink Reply by ivanspeed on December 27, 2014 at 6:16pm
i think i knw who u are talking about loll i never reAd ur essay posts but this one takes the cake
Permalink Reply by zoomsss on December 28, 2014 at 3:51am

Thanks TOG.
Are we there yet? haha!

Permalink Reply by 7_fan on December 27, 2014 at 2:54pm

Question? Why wouldn't he use a nascar wind tunnel for the air flow instead of old school "redneck" highway testing?

Permalink Reply by TOG on December 27, 2014 at 3:05pm

No need to. They got the results they were looking for, doing it the way they did, while they were testing in the desert.

Permalink Reply by WJM on December 27, 2014 at 3:37pm

Attaching ribbons to key areas of the body and driving down a smooth road will provide information just as good as you would get in a wind tunnel using a smoke wand.

Permalink Reply by alan4s on December 27, 2014 at 3:46pm
And it made for a good scene in the video.
Permalink Reply by 7gason7 on December 27, 2014 at 3:53pm

As I posted before Zora Duntov did the same thing in the 50s to fix the 53/54 Corvette from sucking exhaust back into the cockpit. He also needed to find out why there was exhaust generated oil contamination on the rear. The result was to go from this:

to this:

Why pay for wind tunnel time when this does the trick?

Permalink Reply by mark roye on December 27, 2014 at 6:47pm

This technique has been around for many years and often gives better results than a wind tunnel, as a wind tunnel cannot easily simulate the relative motion of the car moving over a fixed surface (road)----unless it's a very special "moving plane" tunnel. The simple test of taping ribbon or yarn at critical points used to be known as "Tuft-testing"and has long been considered an excellent way to get good basic aerodynamic data, such as observing laminar flow as they did here, where it is not necessary to specifically quantify values such as lift or drag. This is particularly the case with relatively slow-speed aerodynamic testing such as this, where it is possible to have a chase-car film the test. No wind tunnel would have given better information for this particular purpose than did this test.

Permalink Reply by Tooltime on December 27, 2014 at 4:28pm

Not to mention, I could only imagine the wind tunnel time and the costs...I do remember when GM paid for some wind tunnel time tears ago, but this is on RGM's dime.

Permalink Reply by Tooltime on December 27, 2014 at 4:41pm

Since I live in Vegas, I just had to ask; Is there any over/under on how many times the Peugeot team puts one on its side or how many times on its lid?

Permalink Reply by J.R. Sands on December 27, 2014 at 5:25pm
The paint booth would work. Variable speed motors added as exhaust fans could be sped up to increase air flow in a contained environment ... IMO VFD would work.

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