Malaysian GP 2011 - Sepang

[beelsebob]

Sorry i'm still not there with you. Are you saying the RBs would be drag limited at 240 km/h?

During the race... plausably... (numbers of course made up).

[beelsebob]

I'm wondering slightly if my use of an example corner and example speeds is confusing the issue – clearly I've not explained my assertion very clearly.

Basically – If there exists a turn such that with DRS both on and off red bull are limited by drag; but McLaren are limited by drag with DRS closed, but limited by downforce with DRS open, then during the race, the difference in lap time will be smaller than during qualifying, due to red bull being slowed by closing the DRS, but McLaren not being slowed (because they were limited by downforce anyway).

[ringo]

Fernando Petrov is quicker than ... you!

Q: Ferrari’s Fernando Alonso seems to be your favoured opponent. You’ve kept him behind your Renault twice now…
VP: No, that’s not fair. That’s racing - I have been quicker than him at just two races. But for sure, in the future, we will have big fights. You can be sure about that.

round 3?

[Shrieker]

I never looked at it that way. Now thinking, hot exhaust gases blowing towards the ground - in front of the rear wheels- really might give an advantage !

Ok, make that fast exhaust gases Can anyone calculate if it'll make a difference in terms of water reaching the rear wheels ? Approximate exhaust exit velocity needed maybe ? Since another poster mentioned it only takes the rear wheels to reach the exhaust exit spot 0.1 sec at 100 km/h, then maybe not lol.

[raymondu999]

I'm wondering slightly if my use of an example corner and example speeds is confusing the issue – clearly I've not explained my assertion very clearly.

Basically – If there exists a turn such that with DRS both on and off red bull are limited by drag; but McLaren are limited by drag with DRS closed, but limited by downforce with DRS open, then during the race, the difference in lap time will be smaller than during qualifying, due to red bull being slowed by closing the DRS, but McLaren not being slowed (because they were limited by downforce anyway).

I think at the end of it it'll still balance out, and I don't think there really is a corner where you have so much downforce that you're drag limited. That would just mean the driver is rubbish at setup Also, bear in mind that it seems Macca has a more effective DRS. Their speed differences with/without DRS are greater than RBR's, so RBR would lose less in terms of drag-efficiency

[WhiteBlue]

but as the track starts to dry it should help, being that almost all of the cars have the exhaust blowing on the difuser

It takes approximately 2,595,880 Joules of energy to evaporate 1 litre of water. F1 rain tyres can displace 60 litres of water per second, which sometimes isn't enough in wet races and they aquaplane. So in order for the exhaust to evaporate that much water it must impart 155,752,800 Joules of energy per second into the water on the track. That's 156 Megawatts of power assuming 100% efficiency....

That exhaust is not going to have any measurable effect on the water reaching the rear tyres.

=D> nice debunking of an ill considered speculation

[alelanza]

I'm wondering slightly if my use of an example corner and example speeds is confusing the issue – clearly I've not explained my assertion very clearly.

Basically – If there exists a turn such that with DRS both on and off red bull are limited by drag; but McLaren are limited by drag with DRS closed, but limited by downforce with DRS open, then during the race, the difference in lap time will be smaller than during qualifying, due to red bull being slowed by closing the DRS, but McLaren not being slowed (because they were limited by downforce anyway).

OK yeah i get you now, so basically we're talking about a section that is a curve for a McLaren but only a bend for RB, effectively allowing RB to use DRS during more meters in quali than other teams, and that advantage is gone during the race. And while there may not be a particular corner that fits that description, really you could say this applies to every corner out there in the sense that RB may be able to get on the DRS quicker out of corners than other teams during quali/FPs. And if they're feeling brave they may stay on DRS longer prior to a corner. SOmething in the back of my brain says there's something wrong behind this reasoning but i can't find what it is, so unless someone else indicates otherwise I think you've made a very good point.

[kalinka]

I think there's nothing wrong there. It was my theory too after Australia. Somehow that 8tenths advantage must have dissapeared/reduced during the race, and the difference was only the DRS use. Hamilton was as close as 1.5sec at the end of the first stint, after being down 5-6sec on the beginning. Neither of them could use DRS during first stint. Of course maybe I'm wrong too...maybe it's due to different track conditions, but the DRS use was the most plausible and simplier explanation for me.

[WhiteBlue]

Just a bit more than 3 hours until free practice again in glorious HD!

[andrew]

This time check was brought to you by a WhiteBlue corporation!

Sorry, couldn't resist!

Seriously though, it looks like being a wet one.



Source

[Just_a_fan]

but as the track starts to dry it should help, being that almost all of the cars have the exhaust blowing on the difuser

It takes approximately 2,595,880 Joules of energy to evaporate 1 litre of water. F1 rain tyres can displace 60 litres of water per second, which sometimes isn't enough in wet races and they aquaplane. So in order for the exhaust to evaporate that much water it must impart 155,752,800 Joules of energy per second into the water on the track. That's 156 Megawatts of power assuming 100% efficiency....

That exhaust is not going to have any measurable effect on the water reaching the rear tyres.

=D> nice debunking of an ill considered speculation

An unseemly display of Schadenfreude there WB...?

[WhiteBlue]

It takes approximately 2,595,880 Joules of energy to evaporate 1 litre of water. F1 rain tyres can displace 60 litres of water per second, which sometimes isn't enough in wet races and they aquaplane. So in order for the exhaust to evaporate that much water it must impart 155,752,800 Joules of energy per second into the water on the track. That's 156 Megawatts of power assuming 100% efficiency....

That exhaust is not going to have any measurable effect on the water reaching the rear tyres.

=D> nice debunking of an ill considered speculation

An unseemly display of Schadenfreude there WB...?

No, just pleasure to see someone use his head.

[Tamburello]

Has anybody got links to FP streams? I'd like to watch the practice sessions.

[narkie]

Quick question: while the forward blowing exhaust may not evaporate the water before it hits the rear tires could it not blow -some- of the water out from under the car, hence less water on track getting to the rear tires? if it did work we'd only be talking tenths here, but isnt that what F1 is about?

[WhiteBlue]

Live timing is actually working today. Track temp 28°C, Air 27. 82% humidity.



Screen shot of the live broadcast