On February 20 the
Olympic bobsledders will begin their downhill runs in the Canadian town
of Whistler, just outside Vancouver. Since its creation in the Swiss
mountain resort town of St. Moritz in 1897 as a way for the rich to get
their kicks, the sport has evolved in leaps and bounds. And by 1924 the
four-man bobsled was so popular that it became one of the official
events at the inaugural Winter Olympics in Chamonix, France.
These days the sleds
themselves are pieces of aerodynamic machinery bound only by the
specifications handed down by the International Bobsleigh and
Tobogganing Federation (FIBT). They are built of fiberglass and steel,
ride on four highly polished runners, and can reach top speeds of more
than 135 km/h (84 mph).
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mit der Bildunterschrift: The
FES optimizes all their sleds using computer simulations
Alpine nations have long held the top spots in the field, and that
includes Germany. The sleds for the national team are developed and
built at the Institute for the Research and Development of Sporting
Equipment (FES) in Berlin. They use the latest in computer and design
technology in a process that would give Airbus and Boeing a run for
their money.
FES Deputy Director Michael Nitsch said that of the three main
factors involved in a successful run - weight, speed and aerodynamics -
weight is the only one that can be easily altered. However, there are
minimum and maximum limits set by the FIBT.
A light sled is easier for the team to push down the first 50 meters
of ice before they all pile in, which makes for a faster start time.
Many coaches swear that it is the start that makes or breaks the race
and, by some estimations, a one tenth of a second lead at the start
turns into a three tenths of a second advantage at the bottom.
On the other hand a heavy sled is more susceptible to the pull of
gravity and will accelerate faster as it whips around the various
curves. A heavier sled is also more likely to maintain a straight
course, which results in a better run.
Skeleton controversy
The FES designs and builds much of the specialized equipment used by
athletes representing Germany in all international sporting events, both
summer and winter. That includes the skeleton, a perhaps unfortunately
named sled that shares the bobsled's Swiss origins, though it was
technically created by an Englishman.
Last week the German skeleton team rejected accusations of cheating
after Canada's Olympic skeleton silver medalist Jeff Pain suggested that
an electro-magnetic material in the German sleds was giving the team an
advantage.
Team spokeswoman Margit Denglar-Paar told Deutsche Welle that the
accusations "are total nonsense," adding that she had "never heard
anything like that" before.
"Our sleds constantly have been monitored by the material commission
of the FIBT and were found to be accurate," she said. "All German
skeleton sleds were checked during the World Cup season [at the end of
last year].”
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Germans put all their sleds through wind tunnel tests
Michael Nitsch from FES was also confused as to how magnets would
help the German team cheat, though he refused to speculate.
According to the FIBT, although a few natural ice tracks are still in
use today, most competitions take place on concrete-based tracks with
artificial ice surfaces. While concrete is often supported internally
with a network of steel rods, it would probably still be difficult to
rig a magnetic field that would successfully pull a sled down the track,
even if electro-magnets were utilized.
In addition skeletons, like bobsleds, are made of steel and
fiberglass and have to conform to FIBT regulations concerning size and
weight, and electro-magnets with enough power to pull a sled would
require more electricity than batteries could provide.
Perfecting the slalom
Of all the sporting equipment being put to use in Vancouver over the
next few weeks, nothing is quite as prevalent as the ski. In fact, of
the 15 official sport categories at the Games, six of them involve skis.
Currently the Swiss, Scandinavian countries and the United States are
leading the skiing sports, from the men's downhill to the lady's
freestyle. And while German athletes are not making the leader boards,
German skis are playing a big role, and have found Olympic fans from
several different nations, including Finland and Austria.
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mit der Bildunterschrift: Reducing
friction is key to a quick and successful slalom run
The current world champion slalom skier, Austrian Manfred Pranger,
will take to the slopes on February 23 using skis designed by Volkl, a
company based in Bavaria. Volkl spokesman Christian Geib told Deutsche
Welle that successful downhill skiing is all about reducing friction.
Volkl has developed a ski called the Speedwall, which, according to
Geib, takes critical advantage of more of the ski surface. Racing down a
slalom course involves a lot of rapid twists and turns, meaning the
sides of the skis come into contact with the ground just as much as the
bottoms do.
"So the sides of the Speedwall ski is made of the exact same material
as the base, which extends the running surface above and beyond the
edges," he explained.
Geib also pointed out that because the sides and the bottoms share
the same material, the sides can be waxed just like the base. Wax
reduces friction and means more speed.
Technological advancements are not just limited to winter sports.
Just about every piece of sporting equipment -- from running shoes to
kayaks -- goes through extensive research and development. And the more
they are improved, the more impressive athletes' performances will
become.
Author: Mark Mattox
Editor: Sam Edmonds
