Lewis Hamilton runs the halo at Spa The late addition of the controversial halo into Formula 1 this year has forced teams to heavily modify their chassis to accommodate the device. Fitted to a number of cars during practice sessions last year, the halo has become compulsory for the 2018 season as a standardised component for all teams. 'Adopting it has been a significant challenge,' said Mercedes technical director James Allison. 'This is not a light piece of work, it's several kilograms of titanium that need to be put on the car, and all the changes that we needed to do to accommodate it so that the overall car would still stay below the weight limit. 'We had to strengthen the design of...
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