Lewis Hamilton to start from back of grid due to penalties

World championship leader Lewis Hamilton will start the Belgian Grand Prix from the back of the grid after being hit with a grid penalty totalling 55 places.

It is a result of one of the more arcane rules of a sport that is necessarily complex because of the high levels of technology involved.

Some would argue it is a ridiculous situation; others that it is an inevitable result of a difficult set of circumstances. So what exactly has happened?

Why has Hamilton been given the penalty?

Formula 1’s rules permit drivers to use only five of the six constituent parts of the engine through this season.

The limitations on usage of parts are in the rules as an attempt to keep down costs – a decade or more ago, it was not unusual for teams to use three or four engines in a single weekend as they sought the best performance.

The penalties are there as a deterrent from using too many parts of the highly complex and advanced turbo hybrid ‘power units’ — which are the internal combustion engine – turbo, MGU-H, MGU-K, energy store and control electronics.

The MGU-H is the device that recovers energy from the turbo; the MGU-K from the rear axle.

The first time a sixth of the elements is used, it is a 10-place penalty. Each subsequent time a sixth element is used, it is a further five places. The same applies the seventh time an element is used and so on.

Hamilton is in this position because he suffered failures of the MGU-H at two consecutive early-season races in China and Russia. Each required a new MGU-H and turbo – the two units are combined – and made it inevitable he would have a penalty for using too many parts at some point later in the season.

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Mercedes are taking the penalty at Spa-Francorchamps this weekend for two reasons:

1) Although Hamilton could possibly have scraped through this race with the engine parts he had, there would be a reliability risk in doing so as they were high mileage

2) It is one of the easiest tracks on which to overtake, so it gives him the best chance to recover the best possible result.
How can he have a 55-place penalty in a 22-car race?

The size of the penalty in terms of places is academic because a driver can only be demoted as far as the back of the grid.

Mercedes have exploited a loophole that exists in the regulations, in order to put as many new engine parts in the ‘pool’ for Hamilton. The idea is to put him in the best possible position for the remaining nine races of the season.

Mercedes knew they needed two more turbo/MGU-Hs at a minimum to complete those grands prix. And the way the penalty system works, that would have itself added up to a 30-place penalty (10 + 5 places for the first two; and again for the second two).

That already put him at the back. So there was no extra penalty in adding a sixth ICE and MGU-K and an eighth MGU-H/turbo, effectively giving him three completely new power units for the remaining races of the season.

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Are place penalties not carried over?

The system is a modification of the one first introduced with the current engine regulations in 2014.

Governing body the FIA realised that the turbo-hybrid engines were highly complex pieces of kit, as well as introducing revolutionary new technology.

How revolutionary? A road-car petrol engine has a thermal efficiency – its ability to convert fuel-energy into usable power – of about 29%, a figure they have been stuck at for decades. A road-going turbo-diesel can be as efficient as about 35-40%.

Modern F1 engines, the best of which produce more than 950bhp, are approaching 50% thermal efficiency – and exceed it when the hybrid system is on full energy deployment.

It is a truly amazing step forward in technology in such a short amount of time, and these advances will soon filter down to road cars, which was the whole point of introducing them into F1.

That’s the benefit. The penalty is that the engines were expensive to develop and were liable to break quite often in their infancy.

To encourage manufacturers to keep costs down and reliability up, a complex penalty system was devised.

Initially, in 2014, if a driver’s penalty could not be fulfilled by the number of grid places he lost, he would be given additional time penalties in the race, in the form of having to drive through the pits, and sometimes stop there for a period of time, too.

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But there was a backlash against this as a number of drivers suffered in 2014 and eventually it was agreed that the system was overly punitive, so the extra in-race penalties were dropped.

The idea of carrying over penalties to future races was rejected before the rules were finalised in the first place, for similar reasons.

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