STONES & ICE Programs and Services Aberdeen

© World Curling Federation2 | STONES Stone information during the open forum this afternoon

© World Curling Federation3 | “Fast and swingy” We need a better definition than: to hand over to the Chief Ice Technicians we use ICE

© World Curling Federation4 | ICE WCF’s Definition of Competition Ice: The ice has to be keen and honest. The ice should have a movement and speed that gives advantages to the player's skill and also gives the guarantee of an interesting game.

© World Curling Federation5 | Parabolic curl 4 feet guard on 2 meters Aggressive curl with no dive 4 feet guard on 0,5 meters Aggressive curl with dive 4 feet guard on 0,5 meters Different movements

© World Curling Federation6 | ICE The curl should be between 4 and 5 feet (no more, no less) and with aggressive movement without “dive” at the end. The speed should be between seconds (no more, no less) hog line to tee line. The surface should be keen and easy to sweep. The WCF demands these Ice Conditions: The above conditions should stay during the whole competition To be a WCF Chief Ice Technician these demands should be followed.

© World Curling Federation7 | Technical requirements for good playing and environmental conditions in a new curling rink How to build a curling rink (on the way) CIE handbook ICE (Curling Ice Explained ) Technical advice for good playing conditions in curling rinks (Documents) WCF SUPPORT

© World Curling Federation8 | HOW TO BUILD A CURLING RINK NEED: An English speaking volunteer with technical background. Notify: Leif Öhman Based on Norwegian building traditions and Norwegian costs.

© World Curling Federation9 | HOW TO BUILD A CURLING RINK STILL NEED: An English speaking volunteer with technical background. Notify: Leif Öhman International manual for all our members Technical requirements are already available

© World Curling Federation10 | Facilities (8 curling rink projects) Stones (5200 stones) Equipment (20 Scrapers) Economic support WCF SUPPORT

© World Curling Federation11 | The board is working on a new strategy how to give economic support to the member associations in this area Economic support WCF SUPPORT

R&D Research & Development STONES & ICE WCF and SCF in the drivers seat (Per Näsman, ECF board is also in the SCF-R&D group) Aberdeen

© World Curling Federation13 | R&D STONES R&D about stones is presented during the open meeting this afternoon

© World Curling Federation14 | Hair A hair is approx. 50 um thick = ggr thicker than the water film On the top of all ice crystals there is an extreme thin water-like film As colder as thinner Ice Crystal Thin watery film app. 0,002-0,1 um R&D ICE This gives wet friction

© World Curling Federation15 | R&D ICE Wet friction is a prerequisite to have a curling stone to curl. But why will a curling stone curl?

© World Curling Federation16 | R&D ICE On wet friction surfaces the friction coefficient changes with the speed and the temperature

© World Curling Federation17 | Stone speed Curl Stone curl Stone speed R&D STONE CURL

© World Curling Federation18 | Resulting Stone speed Curl Stone curl R&D STONE CURL Resulting Stone speed Stone curl

© World Curling Federation19 | Development and testing in progress Measuring stone positions automatically using camera R&D THE GAME

© World Curling Federation20 | THE END (questions)