OK, by now you should know the basics of car handling, but that’s just the start. Do you think you’d be able to describe what your car feels like to drive? This is important if you’re going to be a first-class driver. In motor racing, there are lots of factors which affect your car’s handling. You don’t need to know all the details, but you do need to know how these factors can change the handling of your car during the course of the race. As your tyres wear out and your car gets lighter as the fuel is used up, the handling changes. Your car may start to feel ‘loose’ at the back end, which is also known as ‘oversteer.’ Or you may feel as though your car is ‘pushing’ towards the wall during cornering. This is sometimes called ‘understeer’. If your car suffered from heavy understeer, you’d have to slow down too much for each corner,which just isn’t competitive. And if you didn’t slow down, well, I think you can guess what would happen! Likewise, if your car suffered heavily from oversteer, you wouldn’t stand a chance. It would be uncontrollable; you’d be fishtailing all over the place and would be lucky if you didn’t spin out. Handling problems can be fixed back in the garage. In fact, it’s vital that you’re happy with the handling before each race. But we’ll cover that in a future lesson. So what do you do once you’ve set up your car right but the handling changes during the race? Well, this is what the weight jacker is for. As you can see, the car is about to take the corner. This is the path that the driver wants to take. But if this car was suffering from understeer, then the actual path the car would take would look more like this. Dummy If the driver did not correct this by counter-steering, then the car would spin. The weight jacker can be used to make small corrections to oversteer and understeer problems. The effects are subtle, so you shouldn’t rely on it to completely change the handling of your car, but it’s important to know how it works. By adding weight you can decrease understeer, so do this if you feel your car pushing too much. And if you subtract weight, you can decrease oversteer. You should do this if your car feels too loose in the corners. Got that? OK, time to move on. Another important skill in IndyCar Series racing is drafting. This can sometimes be called “picking up a tow,” or slipstreaming. It works like this. As the car in front cuts through the air, the air pressure in this ‘drafting zone’ is less than the air pressure on the outside. So, basically any car within this zone will encounter less air. This leads to less drag, which is what slows your car down. You can see when you’re in the drafting zone, as your draft meter will start to fill up. The more your draft meter fills, the more your car is experiencing the effect of drafting, which is reduced drag and greater speed. Also, as your car speeds up during drafting, the engine revs will increase, so you’ll need to change gear. This is where sixth gear comes in. When you’re in sixth, you can use the extra momentum to get past your opponent. You can also use sixth gear to save fuel. You don’t need to pass all the time to win a race; you just need to cross the finish line first. If you’re drafting someone and you’re in sixth gear instead of fifth, then your revs will be lower,which means your car will use less fuel. You can save about 5 percent of fuel a lap using this technique. This brings us to the last part of this lesson, your fuel mixture setting. Here’s the fuel mixture setting indicator. It’s currently set to four, which is the normal setting. Clicking it up increases the richness of the fuel. You get extra speed, but you burn more fuel. Clicking it down has the opposite affect. You save fuel, as the mixture is leaner, but you go a bit slower. You also can use a lower setting in conjunction with drafting to save fuel while keeping your speed up. OK, this is the last bit of advice. Whenever there’s a caution period, you should set your fuel mixture to zero. This saves you the most fuel, but be warned that it’s too slow for racing, so be sure to set it back once the race restarts. You’re going to start off by following the pace car as if you’re in pole position. When the pace car peels off, accelerate to race speed and then complete three full laps. As you complete each lap, the time limit shortens, so keep your speed up. Again, you’ll be on your own out there. You’ll fail if you come off the track or crash, or if you run out of time. Dummy Get ready to go! Three, two, one, GO! Well done; you made it around. Bronze medal. Good time, well done. That’s a silver medal. Excellent time, great use of the racing line, you’ve got the gold! Bad luck, try to keep your speed up in the first couple of laps. And if this car was oversteering, then the rear of the car would turn more than the front, making it unstable and very difficult to drive.