211 replies to this topic

[tkulla]

While the driver likely loses a couple of pounds at a hot race, he is wearing a helmet and driver's suit, so most of that weight (moisture) is absorbed into his clothes.

[Madras]

Originally posted by tkulla
While the driver likely loses a couple of pounds at a hot race, he is wearing a helmet and driver's suit, so most of that weight (moisture) is absorbed into his clothes.

True, they probably factor in a kilo or maybe even less actually.

[djellison]

Originally posted by tkulla
While the driver likely loses a couple of pounds at a hot race, he is wearing a helmet and driver's suit, so most of that weight (moisture) is absorbed into his clothes.

And then in the very high cockpit temperatures - evaporates away.

[stairpotato]

Originally posted by D A
I doubt any car weighs 605 kg without the fuel otherwise they'd be pretty screwed if the driver loses any weight during the race.

...this is why they weigh the drivers pre and post race..

[raiseyourfistfor]

Originally posted by F1Fund
So all the cars had to publish fuel loads and not just the top 10 then?

When did for Heidfeld for example have to announce his fuel load? Last year he would have been able to wait till Sunday and see what the weather is like then make a choice. Now it looks like he has to decide before qualy qualy.

This also means that teams must have to choose a fuel load before knowing if they will reach Q3 or not. It looks like Nakajima was going light in the hope of getting pole (or front row) but because he made a mistake he will now start 13th on low fuel which completely rules him out of any realistic hope for points!

Another example is Lewis will now start 18th (Toyota 19/20) with 655kg and Heikki will start 12th with 690kg. I must say I’m a little confused !

On the plus side I suppose it means Lewis and Nakajima will be able to pick there way through the field and overtake a few cars.

In Q2 they still qualify on fumes but last year they could choose how much fuel to put in the car on sunday and now they have to do it 2 hours after qualifying ends.

[Gilles12]

Visit FIA.com for all your regulatory needs

[sputnik]

Originally posted by stevvy1986
Rubens said after the session that his car developed ...

This is the only part of Brawn's emergence I am not looking forward to: the insufferable whiner will have a pulpit again.

[BMW_F1]

I am still trying to figure out what is Renault trying to accomplish with Piquet by having him carry so much fuel in qualy..

[magicon]

That fuel levels for cars that did not go into q3 were added after qualy.

[BMW_F1]

Originally posted by magicon
That fuel levels for cars that did not go into q3 were added after qualy.

Thanks for the clarification. I actually thought those weights were taken imediately after qualifying.

[ville]

Originally posted by D A
I doubt any car weighs 605 kg without the fuel otherwise they'd be pretty screwed if the driver loses any weight during the race.

You are right. Drivers sweat and tyres disintegrate (isn't this also a factor?) so there must be a safety margin. McLaren doctor Aki Hintsa says here (in Finnish) that drivers can sweat up to 3,5 kgs during the race.

My estimates were quite a bit off because of this I guess. Rosberg and Vettel pitted four laps earlier than predicted (lap 16 vs. 20). They were the only drivers that pitted normally because everyone else had to pit earlier than planned (deteriorating soft tyres and SC).

In the FIA paper Nakajima had declared weight of 612.5 kg by mistake, so let's guess that the safety margin is 612.5 kg - 605 kg = 7.5 kg. I also changed slow lap fuel consumption from 40 % to 60 % and redid the estimates. These new estimates agree with Rosberg and Vettel pitstops.

Fuel consumption: 2.48 kg/lap (Williams Australian GP preview)
Slow lap (pit to the grid + warm up) fuel consumption: 60 % (a guess) of 2.48 kg/lap
Time penalty from Q2-Q3 time differences: 0.097 s per lap of fuel and 0.039 per kg of fuel

Pit stops.

Driver		Team		  Calc pit lap  Pit lap guess Remaining laps
Kubica		BMW		   13.92		 13			45
Massa		 Ferrari	   15.53		 15			43
Hamilton	  McLaren	   15.94		 15			43
Räikkönen	 Ferrari	   16.14		 16			42
Vettel		Red Bull	  16.74		 16			42
Rosberg	   Williams	  16.74		 16			42
Trulli		Toyota		17.95		 17			41
Webber		Red Bull	  18.76		 18			40
Bourdais	  Toro Rosso	18.96		 18			40
Button		Brawn GP	  19.77		 19			39
Barrichello   Brawn GP	  20.57		 20			38
Glock		 Toyota		21.99		 21			37
Buemi		 Toro Rosso	24.20		 24			34
Alonso		Renault	   26.30		 26			32
Sutil		 Force India   27.83		 27			31
Nakajima	  Williams	  28.15		 28			30
Fisichella	Force India   29.65		 29			29
Kovalainen	McLaren	   30.29		 30			28
Heidfeld	  BMW		   30.65		 30			28

Fuel corrected qualifying performance.

FC Pos		Pos		   Driver		Team		  Q3-FC		 Q2			Q1			Gap		   Diff
1			 1			 Button		Brawn GP	  84.285		84.855		85.211					  
2			 2			 Barrichello   Brawn GP	  84.509		84.783		85.006		0.225		 0.225
3			 6			 Glock		 Toyota		84.842		85.281		85.499		0.558		 0.333
4			 3			 Vettel		Red Bull	  85.206		85.121		85.938		0.921		 0.363
5			 5			 Rosberg	   Williams	  85.349		85.123		85.846		1.064		 0.143
6			 8			 Trulli		Toyota		85.386		85.265		86.194		1.101		 0.037
7			 10			Webber		Red Bull	  85.426		85.241		85.427		1.142		 0.041
8			 7			 Massa		 Ferrari	   85.526		85.319		85.844		1.242		 0.100
9			 4			 Kubica		BMW		   85.564		85.152		85.922		1.279		 0.037
10			9			 Räikkönen	 Ferrari	   85.598		85.380		85.899		1.313		 0.034
11			11			Heidfeld	  BMW						 85.504		85.827		0.124		 0.124
12			12			Alonso		Renault					 85.605		86.026		0.225		 0.101
13			13			Nakajima	  Williams					85.607		86.074		0.227		 0.002
14			14			Kovalainen	McLaren					 85.726		86.184		0.346		 0.119
15			15			Hamilton	  McLaren					 999.000	   86.454		913.620	   913.274
16			16			Buemi		 Toro Rosso								86.503		0.049		 0.049
17			17			Piquet		Renault								   86.598		0.144		 0.095
18			18			Fisichella	Force India							   86.677		0.223		 0.079
19			19			Sutil		 Force India							   86.742		0.288		 0.065
20			20			Bourdais	  Toro Rosso								86.964		0.510		 0.222

Driver performance in Q3 compared to team performance in Q2. (Fuel corrected Q3 time minus best time of the team in Q2.)

Driver		Team		  Q3-FC BTQ2
Button		Brawn GP	  -0.5
Glock		 Toyota		-0.42
Barrichello   Brawn GP	  -0.27
Vettel		Red Bull	  0.08
Trulli		Toyota		0.12
Massa		 Ferrari	   0.21
Rosberg	   Williams	  0.23
Räikkönen	 Ferrari	   0.28
Webber		Red Bull	  0.31
Kubica		BMW		   0.41

Teammate battle. Fuel corrected time difference to teammate in the latest comparable of the three qualifying sessions. -/+ marks that times were not comparable because Hamilton had to abort his deciding lap due to gearbox failure. EDIT: Notice how Alonso is worth 0.6 seconds.;)

Driver	 Team		  Team Battle   TB Decider
Alonso		Renault	   -0.572		Q1
Rosberg	   Williams	  -0.484		Q2
Glock		 Toyota		-0.543		Q3
Buemi		 Toro Rosso	-0.461		Q1
Kubica		BMW		   -0.352		Q2
Kovalainen	McLaren	   -0.270		Q1-
Vettel		Red Bull	  -0.220		Q3
Button		Brawn GP	  -0.225		Q3
Massa		 Ferrari	   -0.071		Q3
Fisichella	Force India   -0.065		Q1
Sutil		 Force India   0.065		 Q1
Räikkönen	 Ferrari	   0.071		 Q3
Barrichello   Brawn GP	  0.225		 Q3
Webber		Red Bull	  0.220		 Q3
Hamilton	  McLaren	   0.270		 Q1+
Heidfeld	  BMW		   0.352		 Q2
Bourdais	  Toro Rosso	0.461		 Q1
Trulli		Toyota		0.543		 Q3
Nakajima	  Williams	  0.484		 Q2
Piquet		Renault	   0.572		 Q1

Time penalties per lap in the first stint compared to the lightest car.

Driver		Fuel Penalty
Kubica		0.000
Massa		 0.156
Hamilton	  0.196
Räikkönen	 0.215
Vettel		0.274
Rosberg	   0.274
Trulli		0.391
Webber		0.469
Bourdais	  0.489
Button		0.567
Barrichello   0.645
Glock		 0.782
Buemi		 0.997
Alonso		1.201
Sutil		 1.349
Nakajima	  1.381
Fisichella	1.525
Kovalainen	1.588
Heidfeld	  1.623
Piquet		1.725

Edit: Adjusted formatting for the new BB.

Edited by ville, 30 April 2009 - 14:58.

[Dalek Caan]

Very interesting ville.