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PostPosted: Fri May 19, 2017 7:32 am 
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Exediron wrote:
rodH wrote:
I don't think the wt is going to make any measurable difference. In Karting some of the highest level guys and mechanics say that 5-10 pounds is worth about .2-.3 of a sec. This is a 360 pound weight limit class with a small 2 stroke engine and no torque and a single speed (125cc TAG). So 2kg (4.4 lbs) on a 1550 lb car? We are talking thousandths of a second, maybe

It's supposedly 10kg = 0.3 seconds, or at least that's the number that's been bandied around F1 circles for the longest time. Who knows how accurate it is anymore.

For 1kg, that would imply 0.030, so hundredths instead of thousandths. Over the course of a 66 lap race, 0.030 per lap = 1.98 seconds. Races have been won or lost on less than that, so maybe it isn't as crazy as it sounds.

Had Bottas been 33 grams lighter he would've outqualified Vettel in China according to these figures :lol:

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PostPosted: Fri May 19, 2017 8:39 am 
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Covalent wrote:
Exediron wrote:
rodH wrote:
I don't think the wt is going to make any measurable difference. In Karting some of the highest level guys and mechanics say that 5-10 pounds is worth about .2-.3 of a sec. This is a 360 pound weight limit class with a small 2 stroke engine and no torque and a single speed (125cc TAG). So 2kg (4.4 lbs) on a 1550 lb car? We are talking thousandths of a second, maybe

It's supposedly 10kg = 0.3 seconds, or at least that's the number that's been bandied around F1 circles for the longest time. Who knows how accurate it is anymore.

For 1kg, that would imply 0.030, so hundredths instead of thousandths. Over the course of a 66 lap race, 0.030 per lap = 1.98 seconds. Races have been won or lost on less than that, so maybe it isn't as crazy as it sounds.

Had Bottas been 33 grams lighter he would've outqualified Vettel in China according to these figures :lol:


If only he'd had that extra wizz.

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PostPosted: Fri May 19, 2017 10:13 am 
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Back to the weight penalty, I didn't see those replies up there. 0.3-0.4 for 10kg I believe covers most of the tracks but most of those comments come from the V8 era. Monaco and Spa are the extremes. They used to be 0.070 and 0.150 penalty for carrying 1 extra lap of fuel back in the V8 days.

Most tracks the teams are running 85-90kg of fuel. If it was 0.3 at say Spain, that would mean being about 2.5 seconds a lap slower at on full tanks vs no fuel. That seems a little low but could be correct given qualifying modes, tyres usage etc. Vettel was in the 26.1 -26.3 range at the start of the race, he qualified with a 19.2, 7 seconds faster.

Hamilton did the equivalent of a 21.7 on his out lap from the pits trying to undercut Vettel, this was new soft tyres and probably engine in the same mode as qualifying. That was with about 45kg of fuel on board, 1.35 second penalty and he was 2.7 off of his qualifying lap but that 21.7 time he only had clean air in 2 of the three sectors so probably would have been a bit closer.

It seems about right, but I suspect closer to 0.4 might be a more accurate figure for Barcelona and also when the car is very heavy it might not just be losing time to the weight but also the affect that weight has on tyres and balance etc.

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PostPosted: Fri May 19, 2017 9:47 pm 
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So, when a car goes offline and picks up marbles, how much slower is the next lap :twisted:


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PostPosted: Sat May 20, 2017 3:43 pm 
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Taking that logic to extreme, the car with the fresh rubber will be slower than that with worn out ones, because of the extra weight. :lol:

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PostPosted: Sat May 20, 2017 6:10 pm 
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pendulumeffect wrote:
The thing is if the cars are so close in speed that they are nearly identical then you have to try every single trick to find performance.

But to be frank, I would carry a can of Monster and a packet of twiglets and then eat them in front of at the camera after winning the race in parc ferme. That would be class. The champagne sponsor would not be happy however!


This rig would work quite nicely!

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