Although the circuit layout at Silverstone has changed many times, one thinghas remained constant in the 61 years since it hosted the opening round ofthe Formula One World Championship: speed. By the mid-1980s, Silverstone wasthe fastest circuit on the calendar, thanks to its sweeping high-speedcorners; indeed, Keke Rosberg's 1985 pole lap, at an average speed of 259kph, stood as the fastest average lap speed in Formula One until 2002. Andalthough the old circuit was lengthened for 2010, it retained its essentialcharacter, and even gained another flat-out sweeper, at what is now TurnOne, in the new layout. No wonder Silverstone is praised every year as anexample of a true driver's circuit...How did the layout changes for 2010 alter the circuit's character?The new layout introduced last year lengthened the circuit by 750 metres,and added approximately ten seconds to the overall lap time. The circuit isnow 1241 metres (27%) longer than the circuit first used for Formula One in1950 and, coincidentally, the same length (3.67 miles) as the very firstlayout used in 1948. However, although the circuit layout was changedbetween 2009 and 2010, the average lap speed remained almostidentical: the fastest lap during qualifying in 2009 was at an average speedof 236.915 kph, while in 2010, it was at an average of 236.652 kph. Thecircuit includes eight corners that are taken at over 250 kph and just twobelow 100 kph; in complete contrast, Monaco has eight corners below 100 kphand none above 250 kph.What is the quickest corner at Silverstone?Using FIA numbering, the fastest corner on the circuit is Turn Two, known asFarm Curve, on the new section of the circuit - but this is more a flat-outsweep than a proper corner. The quickest true corner is Turn One, Abbey, theflat-out right-hander after the new pit complex.This requires a small confidence lift, but no braking, and is taken atapproximately 290 kph. It was "quite slippery last year because it was verynew," according to Michael, "but I expect it to be good this year."The drivers experience a peak g-force of 4.8G, and over 4G for 1.3 seconds,while the car experiences a peak vertical force, including car mass, of 22kN- equivalent to 2.2 tonnes. This means the car generates two and a halftimes its weight in downforce in the corner.The sequence from Copse through Becketts and down to Stowe is one of themost famous in Formula One. What challenges does it present?With the new corner numbering, Copse Corner is Turn Nine while the Beckettscomplex accounts for Turns 10 to 14, and Stowe is Turn 15. This section ofthe circuit is 1.88 km long (32% of the lap distance) and negotiated at anaverage speed of 272 kph - in around 25 seconds. The lowest speed of the carduring this sequence is 195 kph.What do the drivers experience through the Becketts complex?The Becketts complex includes five corners in total, through which thedrivers experience extremely high g-forces in opposite directions within anextremely short space of time. As Michael says, "Silverstone is a lot abouthigh-speed but it is also about getting the combination through Turns 11 to14 right - if you don't get the first one right, you will still suffer atthe last one." Nico echoes those thoughts: "It's a great part of the lap,and very challenging, because the car has so much grip through there! Youneed a perfect car balance to do a good lap." On the technical front, thissequence rewards both downforce and an agile change of direction; the carsexperience an average vertical force of 21 kN (equivalent to 2.1 tonnes).The drivers barely touch the brakes through here: there is gentle brakingbefore Turn 12, and a little more (but only 35% of maximum) before turn 13.The sequence of g-forces is asfollows:Corner Direction Speed G-ForceTurn 10 Left 300 kph 2.2 Turn 11 (Maggotts) Right 275 kph 4.8 Turn 12 (Becketts 1) Left 230 kph 3.9 Turn 13 (Becketts 2) Right 195 kph 3.9 Turn 14 (Chapel) Left 240 kph 2.2

The circuit presents two contrasting halves, with only fast corners from theexit of Turn Seven (Luffield) to braking for Turn 16 (Vale). How differentare these sections of track in actual terms?The section of track from Turns Seven to 16 is 3.2 km long, equivalent to54% of the lap distance. It takes around 41s to negotiate, at an averagespeed of 250 kph. The other half of the circuit, from Vale to Luffield,including the new Arena Loop, is 2.7 km long (46% of lap distance). This iscompleted in around 48s, at an average speed of 199 kph. In other words, thesection between Luffield and Vale is some 25% faster than the other half ofthe circuit.