Captain Hammer wrote:Jynister wrote:Seems all a bit faffy from turns 4-17.
Then what, exactly, makes a good circuit? Don't just say Spa or Silverstone, actually tell me what makes for a good circuit.
I might as well take the bait and have a go at answering this. After all, whilst there have been (and still are) some excellent tracks for F1, there have been some really atrocious ones along the way (the Las Vegas GP, anyone?), which are conveniently forgotten when people hark back to the good old days and the good old circuits...
OK, I think that the first thing that a good track needs is a blend of variable speed corners. Spa comes to mind, because there are some very high speed corners (Blanchimont, Eau Rouge/Radillon), tempered with a mix of partial throttle corners (Pouhon in particular), where driver skill can gain time, and slow corners where a bold driver can potentially make up places (La Source and Les Combes). This is one failing of chicanes, which Tilke uses liberally - it is easier to defend, because if your opponent overcooks it in the first part, chances are he'll be too far offline to make the next corner, and have to give up on the attempt.
Making it so that the set up is always a compromise is between one part of the circuit and another seems to work well too - Interlagos, for example, where you can either go for a lower downforce setting and maximise the first two sectors, or higher downforce and make up time in the middle sector.
Elevation changes and surface imperfections can also be used to challenge a driver and make a track a bit more special - Istanbul Park is one of the better Tilke circuits, because he was able to use the natural topography to make the turns more difficult. Perhaps this is where a few of the older circuits fall down - for example, Silverstone is as flat as they come, because it was built over an old air force base. As a drivers track, it is quite popular, because of the high speed nature of the circuit - however, because there are only a limited number of slow speed corners, it is tricky to overtake, and it becomes less exciting as a circuit (although the weather has commonly intervened there to liven things up).
Equally, the fact that areas such as the braking zones are so smooth means that the drivers are less likely to make mistakes - perhaps the best corner that Tilke came up with is turn 12 at Bahrein - trying to slow the car down for that corner whilst taking the corner is surprisingly challenging, as we have seen during free practise sessions over the years.
Most of the modern circuits are custom built in totally flat areas (take the latest one, in Abu Dhabi, as an example), so you can't play around with the terrain that much, and since the circuits are usually part of a complex (the Valencia street circuit, for example, formed part of the city's regeneration program), a certain amount of the groundwork has already been set out by alternative architects. And the fact that Tilke is always asked (although, to be fair to him, there is only one other company apart from his which specialise in track design) means that we don't have enough variety - if we had a few more new designers, then we might see a bit more experimentation with corner layouts and so forth.