Those are some great photos Jeongyun! Nice variety too, different framing, some zoomed in tight, others farther out, and some very cool slow shutter speed panning shots too like #4 of the Toyota Echo.
It's very useful to be able to see and study outside shots of your car in action.
One of my students, Courtney in the red Hyundai Accent, is Greg Kierstead's niece. Smooth driving skills must be a genetic trait in that family. She was really very good.
That little Hyundai would have been an awesome car if it weren't hobbled with useless all-season tires. But Courtney used those tires to their absolute limit, rarely pushing them beyond that. And I mean that in a good way.
She wasn't at all afraid to push the car, but she immediately understood that the front tires are only capable of so much. She managed to hang those front tires right at the limit of grip, without excessive wheelspin under throttle, and without excessive steering wheel angles, all the time keeping the front wheels smoothly hooked up right at the very limit of traction.
Many students will come charging into a corner, crank the wheel over way too far, then stand full on the throttle believing their FWD will simply pull the car around. They're often surprised or frustrated to discover that the car instead plows straight ahead in massive understeer.
The lousy all-season tires on the Hyundai were actually a good demonstration tool for the school, because it was so much easier to make them lose grip. It required a very smooth approach to keep them hooked up with traction and Courtney managed to dance on that limit very well, the whole time keeping within a very narrow range of the limit of traction, neither too fast nor too slow.
You can see that clearly in the photos of her red car. The front tires are angled exactly the right amount, not quite sliding, not quite spinning, not kicking up a lot of snow. Very cool and very smooth.
The photos of Christoph in the BMW are really neat too. I'm very impressed with his driving.
In the first six photos you see him drifting the car into the right hand hairpin corner, yet the whole time the front tires are pointing almost perfectly in the same direction as the rear tires. It's not a wild crossed-up showing-off oversteering power slide, or steering wheel cranked way too far over into an understeering push. It's a picture perfect 4-wheel drift, crabbing the car through the turn at a controlled drift angle, while keeping all four tires loaded equally to the limit, just enough to kick some snow out to the side.
That's so cool!
It's a perfect illustration of how you really don't need a whole lot of steering input. The front wheels are hardly angled at all, they're practically pointed straight ahead the whole time. With just the right amount of throttle applied to the rear wheels, the car can be pivoted through the corner with all four wheels doing their equal share of the work. THAT is the perfect way to take a corner.
Of course we took full advantage of the great track conditions and safe environment to push Christoph well beyond this point too. As he became more confident he started to get more and more exuberant, spinning around completely backwards on several occasions, or getting into tank-slappers where he couldn't keep up fast enough with the steering inputs.
The wilder it got though, the more obvious it became that this was not the quickest way around the track. Even limited by her lousy all-season tires, Courtney's super smooth driving style was clearly way quicker everywhere through all the corners compared to Christoph's fishtailing flailing.
But that was exactly what we were here for to learn. Learn by pushing yourself and your car to the limits and beyond, as long as it is in a safe and controlled school environment where you can't hurt anything.
The fact that Christoph was having problems controlling those huge slides, and spun out frequently, was actually very reassuring to me. It tells me that he has not been out somewhere with my car practising this stuff on his own on open roads. I'm happy that he has had this opportunity to see for himself that big power slides and spin-outs can be fun, but that they are counter productive and slow.
Most of all, I'm thrilled at how well both of my student drivers saw, learned, and demonstrated, that smoothness is the key to good driving. What a fun day that was!