Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

In search of speed

11.01.2010
You couldn't have asked for a better day for a competition. It's minus five degrees, the sun's shining and there's not a breath of wind.

The snow's perfect and the biathlete's in top form. He's one of the best – he can win the race. Often there's only a few thousandths of a second between the victor and the vanquished, so the gliding ability of his skis is very important. And this depends on several factors, not least whether the wax mixture he's applied suits the particular type of snow.

Anyone looking for optimal ski performance must first understand the laws of friction. That is why wax and ski coating manufacturers are counting on the expertise of researchers at the Fraunhofer Institute for Mechanics of Materials IWM in Freiburg. The scientists have been studying the gliding ability of skis and know how to make ski athletes go like the wind.

Prof. Dr. Matthias Scherge, Head of the new Microtrobilogy Center in Karlsruhe, says: »The snow, the ski coating and the wax that is applied all unite to form a single entity. We can't alter the snow, but we can adapt both the wax and the coating to suit particular snow conditions.« The researchers use a special technique to analyze the friction and gliding effects; they simulate the contact between a single snow crystal and the coating with the aid of a test rig, and then measure the coefficient of friction in relation to temperature.

»It's the first 10 to 15 nanometers of the coating surface that determine the gliding effects,« explains Scherge. And they have another item of equipment in their armory as well: a ski tribometer. Here, a small section of ski travels in a circle over a snow-covered disc, allowing the researchers to test different combinations of waxes and coatings and ascertain the optimum combinations for specific conditions such as temperature. The ultimate test is then conducted in the ski hall, where biathletes perform glide tests on a hundred-meter test run with a defined gradient. Their times are measured with the aid of a leg-mounted transponder, which guarantees split-second accuracy; this enables the researchers to establish how many thousandths of a second can be shaved off their times by the right combination of ski coating and wax.

The researchers are working with Holmenkol and other partners to develop novel waxes and super fast coatings. Scherge says: »We've talked with athletes and also with the technicians who wax their skis prior to every competition. It's only with their knowledge and experience that we'll be able to create skis that glide perfectly.«

Matthias Scherge | Fraunhofer-Gesellschaft
Further information:
http://www.iwm.fraunhofer.de

More articles from Materials Sciences:

nachricht Beyond conventional solution-process for 2-D heterostructure
22.06.2018 | Science China Press

nachricht Graphene assembled film shows higher thermal conductivity than graphite film
22.06.2018 | Chalmers University of Technology

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Graphene assembled film shows higher thermal conductivity than graphite film

22.06.2018 | Materials Sciences

Fast rising bedrock below West Antarctica reveals an extremely fluid Earth mantle

22.06.2018 | Earth Sciences

Zebrafish's near 360 degree UV-vision knocks stripes off Google Street View

22.06.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>