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

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)