Paul di Resta, Force India, Silverstone, 2013

Di Resta sent to back of grid as car fails weight check

2013 British Grand PrixPosted on | Author Keith Collantine

Paul di Resta, Force India, Silverstone, 2013Paul di Resta has been excluded from the results of qualifying after stewards found his car was under the minimum weight limit.

Di Resta had qualified fifth for Sunday’s race. But his car failed a weight check conducted after the qualifying session.

The stewards ruled Force India had committed a “Breach of Article 26.1 of the FIA Formula One Sporting Regulations and Article 4.1 of the FIA Formula One Technical Regulations as defined in Article 1.9 of the FIA Formula One Technical Regulations.”

Technical delegate Jo Bauer explained how Di Resta’s car was found to be underweight:

“After the third qualifying session car number 14, driver Paul Di Resta, was weighed 641.5 kg, 0.5 kg under the minimum weight as required by Article 4.1 of the 2013 Formula One Technical Regulations.

“After this the car was completely drained in order to establish that the minimum weight of the car without fuel, 642 kg, was respected at all times during the qualifying practice sessions. Then the car was weighed again without any fuel on board and weighed only 640.0 kg, 2.0 kg below of the minimum weight.

“The scales were checked with the calibrated weights supplied by the organizer of the Event and they showed 599.5 kg when checking with 600.0 kg of weights. Taken this 0.5 kg into account, car 14 is still 1.5 kg below the minimum weight as required by Article 4.1 of the 2013 Formula One Technical Regulations.”

Di Resta will be allowed to start the race from the back of the grid.

Jules Bianchi was given a reprimand after failing to stop at the weigh bridge during the qualifying session.

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81 comments on “Di Resta sent to back of grid as car fails weight check”

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  1. There goes my predictions :(

  2. Out of interest, could anybody give me a rough estimation as to how much time DIR would’ve gained with that 1.5kg missing?

    1. The effect would have been almost negligible. However, the stewards are bound by the rules – they cannot say “well, you didn’t really get an advantage, so it’s okay this one time because it’s your home race/you asked us nicely/we’re drunk/Mercedes did it”.

    2. He was 0.0023% underweight on the minimun weight. So not alot!

      1. thatscienceguy
        30th June 2013, 2:43

        0.23% under, not 0.0023%

  3. If the scales had been properly calibrated for the first weighing he would not have failed, he would have been at exactly minimum weight, the missing 0.5 kg would have been added back. The subsequent draining test would not have happened and the missing 1.5 kg would not have been found. So he was unlucky to get caught. I doubt it was deliberate, it’s difficult and expensive to weigh accurately to 0.1% (0.64 kg) at several hundred kilos gross weight.

  4. While I feel for Di Resta, its important to note that there are 4 factors that effect the overall weight of a car:

    1. Dry Weight of the Car
    2. Fuel/Fluid Weight
    3. Driver Weight
    4. Tyre Weight

    I wonder which component is under weight? Is it the onset of a fluid leak?

  5. So how does this happen?

    I can’t imagine they’ve changed the cars dramatically enough to lose 500g, so where has the weight gone? Why aren’t both Force India’s underweight? Is it the driver?

    1. Autosport reports that the issue is with DiResta – that is, he weighed less than his normal weight and did not inform/advise the team of this, so they did not make a correction/update to the car’s ballast.

      Oh Paul…silly, silly Paul.

      No doubt he’ll blame it 100% on the team. F.I. would’ve protested/appealed/contested the stewards’ ruling if there was any possibility of their not being at fault – so no doubt they’re guilty and it’s once again the DiResta Follies.

    2. @dragoll @soundscape Paul was underwight, but the team should have known that and adjusted accordingly

      1. Exactly. The broadcast showed RBR weighing Vettel just before Q1 for example, so it seems some teams at least are mindful of it and plan accordingly.

        I also wonder where an F1 driver can even find a few lazy kg to lose, while they aren’t cyclist thin they are hardly packing on the weight.

  6. @keithcollantine , Now that Di Resta is sent to the back of the field , would it change the tyres on which button starts ( now 10th ) or does he still have the choice of starting on whatever tyres ?

  7. So, no one is going to comment how in the high-tech world of F1, the scales can be miscalibrated by half a kilo?

    1. I think that they should get a huge set of balance scales and just put a 642kg calibrated weight on one side and get the driver to drive on to the other and see if it balances.

    2. There is a half kilo leeway in the rules. It doesn’t mean that the scales are miscalibrated.

  8. After this news, I’ll be keeping an eye on Daniel Ricciardo at the start today. He’s been promoted to the clean side of the grid, only one place behind the notoriously slow-starting Webber, whose car he would dearly love to be driving next year, I’m sure. He will probably see the race as a chance to make a statement of intent.

  9. Michael Brown (@)
    30th June 2013, 13:02

    I see Di Resta is starting 21st. Penalties are applied in the order they were issued, so Van Der Garde who was originally 22nd, should have been promoted to 21st after the exclusion of Di Resta.

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