So that's the end of my F1 testing for 2018. I didn't take many photos today, and we spent less time out on the circuit as we also had a paddock tour booked. A few observations after watching the cars for two days, and I'll post what I saw rather than voice my own opinion on whether it is positive or negative - others here can be the judge.
The weather was far, far colder than the previous six years of testing I've done in Spain. At times, the cars were acting in the same way that they would putting on a set of slicks just as conditions changed from wet to dry, i.e. ice rink. Once up to temperature though, it looked like business as usual, other than perhaps at the end of the straights.
I use turn 9 as a very crude measurement of the car's aero. There's heavy braking into turn 7 (and drivers often mess up there on the exit) before an uphill climb through turn 8. Turn 9 is very borderline on whether it can be taken flat out. Stroll crashed there last year trying to do that, and Hamilton binned it yesterday late on trying to do the same after the rain got a bit heavier. Today was quite interesting.
The Ferrari took a good few laps, presumably getting heat into the tyres and burning off fuel, before it didn't have to change down for turn 9 and could just lift. After a few more laps it was pretty much flat out. The Toro Rosso never quite got there, always either changing down or noticeably lifting. The Mercedes just lifted a little, but also often used that corner for some sort of engine mapping testing (spanners in a washing machine sounding stuff). Haas managed a couple of mild lifting laps but mostly changed down a gear. The Red Bull, three laps into a stint once their fuel issues were sorted, just hammered straight around the turn like it wasn't there.
The track was very cold, and it was changing quite rapidly as the weather changed. Kubica was dreadful for his first couple of laps, but then managed to get up to a decent pace quite quickly. Force India and Renault took longer (although Renault were up to speed more quickly yesterday). I couldn't see the slower corners in sector three, as they've torn down the stands there and it is all fenced off.
On his fastest laps today, Vettel was really pushing hard, especially in sector three. He consistently ran wide more than other drivers, and often put two wheels in the gravel in the stadium section. Sauber seemed very slow, if they're truly running a 2018 Ferrari engine. Force India were also slow, but they seemed to have some problems getting heat into the tyres, more so than other teams. I didn't see enough of McLaren today, as most of their running was while I was doing the paddock tour.
The circuit tour was pretty good - we saw the driver briefing area where they also do the press conferences, got to stand on the podium and saw race control too. We met Alain Prost in the paddock and saw a couple of non-driving drivers. Anyway, just a few photos from the day: