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Author Topic: Heated skate blades faster?  (Read 11863 times)

Offline Mogen_david

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Heated skate blades faster?
« on: 03/10/2007 19:43:38 »
A product for ice skates is promoting a heated skate blade:



Quote
Gretzky is plugging a new, battery-warmed skate blade that melts ice to give its wearer — so the endorsements contend — more speed with less work and overall, a better hockey experience.

Hey, is it too late for the Leafs to place an order?

The Thermablade inventor, Calgarian Tory Weber, says the steamy steel is not a novelty item, like Cooperalls, nasal strips or pyramid power. The 43-year-old, who spent more than $5 million over five years to bring his idea to market, believes the “fairly simple physics” behind the electronic blade will revolutionize hockey for competitive players.

“I had a basic understanding that if you put something hot on ice, it’s going to melt and be slippery,’’ said the former steam engineer at the Banff Springs Hotel.

“It’s not super technical. We heat the blade and it creates a thin film of water between the skate blade and the ice and gives the user substantial performance benefits.”
newbielink:http://www.thestar.com/Sports/article/260714 [nonactive]

Another company claims:
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When you skate frictional heat is produced. With a conventional blade system this heat is lost, because the steel can not absorb any of it. The resin a t-blade runner is made of however, can store this frictional heat and the thin steel band heats up by up to almost 4?C. This, by the way, is what we call the thermo-effect which gave t-blade its name. How does this make you faster? When gliding over the ice smoothly the blade runs on a thin waterfilm. The more water, the smoother and the faster the glide! Of course a warmer runner melts more ice, meaning the waterfilm you skate on is more stable. The second reason why the t-blade system is faster than conventional runners is the smoothness of the gliding surface. Compared to a t-blade a freshly sharpened steel runner might have edges just as sharp, but the gliding surface is a lot rougher, it is striated from sharpening. This striation makes the waterfilm rip and therefore slows down the skater. The cold rolled steel strip of which the gliding surface of our runners consists is just a lot smoother, since it is never sharpened. Overall the gliding resistance of t-blade is approximately 35% lower than in any conventional blade. This has been proven by scientific tests. When talking to pro players who use t-blades, only few will tell you that they actually feel like they are going that much faster. What they do describe though, is the feeling that skating is more effortless with t-blades and that it saves energy.
newbielink:http://www.t-blade.com/features.php#more%20speed%20&%20agility [nonactive]

But does it really work that way?



Quote
Somorjai's recent discoveries have explained why skaters and pucks slide on the ice. These new findings challenge long-held theories about why ice is slippery. In the past, scientists believed that either pressure or friction melted the ice, creating a water lubricant that allows skates and pucks to slide. Berkeley chemist Michel van Hove, a colleague of Somorjai's, has done calculations which show that skates and pucks do not generate enough pressure to instantly liquefy ice. Somorjai has discovered that ice has a "quasi-fluid layer" that coats the surface of ice and makes it slippery.
[...]
According to Professor Somorjai, the "quasi-fluid" or "water-like" layer exists on the surface of the ice and may be thicker or thinner depending on temperature. At about 250 degrees below zero Fahrenheit (-157 centigrade), the ice has a slippery layer one molecule thick. As the ice is warmed, the number of these slippery layers increases. This may help explain in part the difference between "fast ice" and "slow ice." As the number of layers increases, the players' skates need to "slosh" through more of these "water-like" layers; more friction occurs in these conditions, slowing the players down.
[...]
The nature of ice was examined in "The Ice" section--including the latest findings by chemist Gabor Somorjai. This new information about ice changes the way we look at skating. For a number of years before Somorjai's research, there was a debate as to whether pressure or friction created the water lubricant that was believed to be required for skating. Most scientists seemed to think that it was pressure. According to Somorjai's findings this is not the case. So what do you skate on? Well, actually you skate on vibrating molecules.

newbielink:http://www.exploratorium.edu/hockey/index.html [nonactive]

So I don't know about you but it sounds like a gimmick to me.  But maybe I'm misunderstanding the physics/chemistry of the products and skating.  Will heating your skate blades help make you faster?


 

Offline lightarrow

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Heated skate blades faster?
« Reply #1 on: 03/10/2007 20:05:36 »

So I don't know about you but it sounds like a gimmick to me.  But maybe I'm misunderstanding the physics/chemistry of the products and skating.  Will heating your skate blades help make you faster?

Sincerely I haven't read all in those advert. but I can state heating the blades should indeed increase performance because of better melting of ice.
 

Offline syhprum

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Heated skate blades faster?
« Reply #2 on: 03/10/2007 22:28:57 »
I believe that competitors have been disqualified in winter sports competitions for using heated sledge runners or skis
 

Offline lightarrow

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Heated skate blades faster?
« Reply #3 on: 04/10/2007 12:46:11 »
I believe that competitors have been disqualified in winter sports competitions for using heated sledge runners or skis
If this is true, it's a confirm of my intuition!  :)
 

another_someone

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Heated skate blades faster?
« Reply #4 on: 04/10/2007 13:15:55 »
I believe that competitors have been disqualified in winter sports competitions for using heated sledge runners or skis
If this is true, it's a confirm of my intuition!  :)

Not necessarily - I can imagine that whether they are effective or not, heating the blades could well cause the ice to deteriorate and be less usable for subsequent skaters (this is not to say the concept is necessarily ineffective, only that the reason why they are banned may have nothing to do with whether they are effective or not).
 

Offline lightarrow

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Heated skate blades faster?
« Reply #5 on: 04/10/2007 19:33:17 »
I believe that competitors have been disqualified in winter sports competitions for using heated sledge runners or skis
If this is true, it's a confirm of my intuition!  :)

Not necessarily - I can imagine that whether they are effective or not, heating the blades could well cause the ice to deteriorate and be less usable for subsequent skaters (this is not to say the concept is necessarily ineffective, only that the reason why they are banned may have nothing to do with whether they are effective or not).
Right remark. However, the blades shouldn't deteriorate the ice very much, in order to get better performance: the more they cave the ice, the more difficult it is to make a bent.
 

lyner

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Heated skate blades faster?
« Reply #6 on: 05/10/2007 22:54:11 »
I think that the pressure under the skate or the runner must be relevant. The actual shape - hollow ground - of a blade is said to be quite important in performance so I can't see  how its only a function of the basic ice temperature. It would be reasonable to expect some 'adiabatic' effects right where the temporary high pressure exists.
If these fancy skates have an insulating layer, the effect could be stronger because the metal wouldn't conduct so much heat away.
 

paul.fr

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Heated skate blades faster?
« Reply #7 on: 06/10/2007 16:33:04 »
And there was i thinking that this was product placement, two posts in different sections of the forum with exactly the same text.
 

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Heated skate blades faster?
« Reply #7 on: 06/10/2007 16:33:04 »

 

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