stones & ice programs and services aberdeen 2009-12-06
TRANSCRIPT
STONES & ICE
Programs and ServicesAberdeen 2009-12-06
© 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 curl4 feet
guard on 2 meters
Aggressive curl with no dive
4 feetguard on 0,5 meters
Aggressive curl with dive
4 feetguard 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 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.
© 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&DResearch & 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
© 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 = 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
© 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 |
Sto
ne
spee
d
Curl
Sto
ne
curl
Sto
ne
curl
Sto
ne
spee
d
R&D STONE CURL
© World Curling Federation18 |
Res
ult
ing
Sto
ne
spee
d
Curl
Sto
ne
curl
R&D STONE CURL
Res
ult
ing
Sto
ne
spee
d
Sto
ne
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)