It's actually a lot of fun doing that!
We regularly used to take our Jeeps out to a local sand pit area before
it closed that is challenging in the summer and run it in the winter.
It is a blast and our 4x4's can climb wicked slopes in snow. Way more
than 37.5 degrees.
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pictures.html?id !15147590
(More Off Road album links at bottom of the view page)
And the explains the problem:
" is hard to believe that, after quite literally scaling new heights, he
has just parked his Atlas Grey Audi A6 4.2 quattro 47 metres off the
ground at an angle of 37.5 degrees and that is approximately equivalent
to an 80 percent gradient."
80%, not 80 degrees.
So how did they get 0.8 from 37.5 degrees?
Is that the tangent of the slope angle? It is close numerically, but
it doesnt sound right, as it can exceed 100%. Or is the sinus? That
doesnt match numerically with 0.8.
Your observation is correct, it's the tangent function. Gradient
is the ratio of vertical elevation -vs- horisontal displacement, and
with slopes greater than 45 degrees the vertical elevation goes up
faster - hence it is possible for gradient to measure past 100% .
For instance, the gradient of a ladder leaning against a wall can be
several hundred %'s, and the gradient of an upright wall itself is as
much as infinite... :-)
- Risto -
Percentage, as written down on the warning traffic signs (e.g.,
) is defined as the
vertical distance ascended (or descended) versus the horizontal distance
travelled, 100*b/a in the following diagram:
This is the tangens of the angle between sides c and a. The gradient is
also given as 1:X, but this is just the fraction b/a written as 1:(a/b).
Here's a table of some gradients in degrees and percentages, both rounded
to 0 decimal places:
deg | perc.
==========90 | infinity
45 | 100
31 | 60
30 | 58
27 | 50
17 | 30
14 | 25
6 | 10
Well Christ, it's a fraud!!
"The Audi A6 4.2 quattro with 6-speed tiptronic that drove up the ski
jump was otherwise a perfectly normal production version. Two minor
exceptions: the automatic transmission was kept in first gear - the
slight power loss that occurs when changing gear would have made it
impossible to climb such a steep gradient - and the tyres'
six-millimetre spikes. Tyres of this kind are also used in rallying."
"Minor Exceptions"?? 6mm spikes??? My Vette could make it up that
hill with freakin' spikes!
The article claims "back then and this time, both Audi models drove up
the ski jump under their own power; they were not pulled." I believe it;
I just don't see any use for being able to climb ski jumps in first gear
with special tires.
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.
That article was great. You can view the finished commercial at the
I'll defer all the calculations to the mathematicians in the group, I can
understand that 80 degrees is almost straight up so it must be 80% so
semantics is probably what's being debated.
I would submit to you this is what marketing is all about, making the public
aware of the product, generating discussion and creating an impression.
With the several dozen posts, in multiple newsgroups it has generated, and
the articles on how the commercial was made, IMHO this commercial has
accomplished its purpose. A bunch of guys were talking about it at my work
last week and I'm sure that wasn't the only place that discussion was taking
place. How many thousands of advertisements are we constantly exposed to on
TV, radio, the web, newspapers, magazines, and billboards that make
absolutely no impact on us?
Just my 2 cents
(top posted for your convenience)
Actually, it had a safety line attached in case it did slip and fall off the
ramp. Similar to that used by mountain climbers - it's slack, but there as
a precaution. If it's the same as the commercial for the 1987-vintage Audi
100/5000 quattro, then you'll see the tether in the film below the
centreline of the car. It was not winched up, though, it drove up:
Now the spiked tires.....that's grip, baby! Too bad spikes are illegal here
BTW, the ad with the Audi climbing the Andes in Chile with no rubber on the
- no spikes there!
There are many other films on the Nordic Audi web site (under "Filmer") -
there's probably the test that the German TV show did on the different SUV's
climbing the ski slope. Of course, they're essentially commercials,
caricaturing the selling points of the vehicle (hence, the use of spiked
tires). In my work I've driven my quattro-equipped sedan off-road (in
fields and various construction sites), but I'd never drive off-road like
the guy in our office that owns a Jeep. Of course, some say the difference
between 2 wheel drive and 4 wheel drive is the distance you drive in before
you're stuck.....and it holds true for our Jeep guy, who needed an excavator
to drag him out this past summer. ;-)
1987 Audi 5kTQ - never tried to climb a ski jump, no spiked tires, though
1980 Audi 5k - could negotiate the parking lot of the ski resort.
1962 and '64 Auto Union DKW Junior deLuxes - 36 Hp - gets stuck
contemplating climbing hills
(SPAM Blocker NOTE: Remove SHOES to reply)
Nice ad, but that's just it, advertising... How many people need/have
to do that in a car? My old landie could probably do it too (slower
tho') No tires? I reckon the rim sides with the asphalt/macadam? after
having worn down in the first few metres, would be probably be more
effective than spikes. I wouldn't advocate doing this yourself, unless
you were desperate to get to the top, or if you had a spare set of
PS I live in Switzerland, 4x4 is useful!... but, braking is like any
other car... Spikes are allowed here, but you are limited to 80kmh. My
best car ever on the snow was my '69 Beetle equiped with snow tyres.
SRX6 - hibernating
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