F1technical.net

godlameroso wrote:It's likely to be hotter in Montreal than it has been at any other race this year. The Soft tire may actually be a good race tire, particularly since Canada places a big emphasis or rear tire wear. The softs like heat.

If Monaco is any indication (often it isn't) i would leave the SS's at home, the difference in durability between the SS and US is none (performance is also quite close to be fair) and it doesn't make much sense to run them.

Sevach wrote:

godlameroso wrote:It's likely to be hotter in Montreal than it has been at any other race this year. The Soft tire may actually be a good race tire, particularly since Canada places a big emphasis or rear tire wear. The softs like heat.

If Monaco is any indication (often it isn't) i would leave the SS's at home, the difference in durability between the SS and US is none (performance is also quite close to be fair) and it doesn't make much sense to run them.

Monaco was a lot cooler than previous years. Also Canada puts more energy through the tyre so I think US may last 10 laps if the weekend is hot. In qualifying they will be like chewing gum if it is warm.

It will be, ambient temperature is going to be in the low 30's track temperature in the high 40's but it's weird because there's a large body of water in direct proximity to the track which tends to limit convective heat with the asphalt, but there's also a fair bit of humidity in the air. At this time of year when the sun shines it's hot but it's not, it depends on the wind, of which there's usually a fair amount as well.

There's also a lot of heavy braking at this track so the front tires don't have much trouble getting into temperature.

Interesting. That must mean that Pirelli's mandatory two sets are the same compound for the first time. In all the races previously they have required one each of the two hardest compounds.

best info i have found to date about the tires.

http://www.motorsport.com/f1/news/analy ... es-774870/

Hard       High working range   105-135°
Medium     Low working range     90-120°
Soft high  High working range   100-125°
Supersoft  Low working range     85-115°
Ultrasoft  Low working range     85-115°

Haas's steiner on tyre struggles

"Absolutely. I think I can just speak for us.

"I look at other teams trying to do different things and you guys have seen what Force India did. It is the main objective – to get the tyre to work and then be prepared for the race that you know what will happen so you don't have graining or the pressure blowing up."


Was curious about force india did?

vas_04614 wrote:Haas's steiner on tyre struggles

"Absolutely. I think I can just speak for us.

"I look at other teams trying to do different things and you guys have seen what Force India did. It is the main objective – to get the tyre to work and then be prepared for the race that you know what will happen so you don't have graining or the pressure blowing up."

Was curious about force india did?

When I read that quote I got the impression that it was not any single magic thing that FI did, but rather the way the team focuses resources on the tyre, because of the following sentence about the main objective. This could be at the track and away from the track; for example instead of testing tiny things like monkey seats and whether 3 VG or 4 VG is better, perhaps they spend all practice getting their understanding of the tyres as best as they can - and this helps you in the race. Which is probably less money than Mercedes spend on understanding tyres, but for a small team like FI it might be a larger percentage of time and money than normal. Indeed in that same interview Steiner mentioned that the Haas team have almost no specialist tyre team.

Bad news for the people who think that a single 'push hard' tyre will solve all their disappointments:

http://www.motorsport.com/super-formula ... ar-802402/

You should be able to push hard for consecutive laps, but still degrade because of physical wear. What we have now are tires that degrade from thermal wear, not physical wear. The tires get too hot and they don't cool off unless you drop your pace dramatically. Every little mistakes pushes up the temperature taking them out of their grip window, so you drive below the limit so the tires stay constant. What they're trying to do is have tires that don't suffer thermal degradation, you can thrash them and the tires will take the temperature. The tire will simply lose grip from being physically worn, they don't even have to lower performance just change the balance enough to make someone feel uncomfortable.

Is that even possible in a rubber compound? On a sliding racing car we're talking about loads of friction and other forces which make heat. So heating the tyre in some way is practically unavoidable. And all rubber degrades from thermal temperature, it's just the property of rubber. How can you have a chemical compound like rubber not be affected by heat, especially such localised heat on the surface of a tyre?

Why not a multi layered compound that gets harder progressively?

That's what the tyre is now isn't it? Although with the only two layers instead of several.

Let's face it, we all know f--- all about tyre construction

zac510 wrote:That's what the tyre is now isn't it? Although with the only two layers instead of several.

Let's face it, we all know f--- all about tyre construction

Pirelli introduced a very hard layer under the main compound this year that was supposed to bring back "the cliff", but it hasn't worked. Perhaps there's too much regular tread depth that has to wear first, perhaps as it wasn't properly track tested it just went wrong somewhere.

In general though they use polymers in the construction to manage the thermal degradation.

FPV GTHO wrote:

zac510 wrote:That's what the tyre is now isn't it? Although with the only two layers instead of several.

Let's face it, we all know f--- all about tyre construction

Pirelli introduced a very hard layer under the main compound this year that was supposed to bring back "the cliff", but it hasn't worked. Perhaps there's too much regular tread depth that has to wear first, perhaps as it wasn't properly track tested it just went wrong somewhere.

In general though they use polymers in the construction to manage the thermal degradation.

You are right. The problem for this year is, that they wanted to build a tire that wears faster and which is softer. But instead they build a softer tire with less wear. The worst happened with the US, which wears like the SS.
Thus, you can not run down the tread without risking, that the tire explodes due to structural wear...

If Pirelli are to be believed, Vettel's tire blowout was caused by debris, not a structural failure of the tire.