1. STONES & ICE Programs and Services Aberdeen 2009-12-06

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

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

4. © 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.

5. © 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

6. © 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 24-25 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.

7. © 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

8. © 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.

9. © 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

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

11. © 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

12. 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 2009-12-06

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

14. © World Curling Federation14 | Hair A hair is approx. 50 um thick = 500-50 000 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

15. © 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?

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

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

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

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

20. © World Curling Federation20 | THE END (questions)