@Rawpace: To check information from two sources and because the Toyota wind tunnel is more advanced (as explained below). However, some projects will continue in their own wind tunnel, which is cheaper for them to use.
@Rob: The Sauber probably has the least elegant rear end (if that's what you mean?!)
@Rawpace: Yep, its balanced against the use of CFD.
@TPH: If Marussia doesn't make the grid, our understanding is its prize money gets split among the others. The lack of the two teams at the bottom this year will be a relief for Sauber, which lost out on ninth place to Marussia last year.
@TPH: Although I should add, Sauber has not indicated that they do not want Marussia to come back. In fact Sauber has been one of the champions for a fairer deal for all teams and was the first to really start ringing alarm bells about the situation of Marussia and Caterham last year.
@Rawpace: It's the same size by regulation, so I'm not sure exactly what you mean
@Mattyc2003: That is possible, but the unusual bulkhead design (pictured below) is a feature on the MP4-30.
@Oliver: That will be taken into account but also the airflow around the airbox and towards the rear wing
@Dane: It's still a bit stop and start with no super long runs. But progress nonetheless for McLaren.
Vettel, Kvyat and Maldonado are all on track at the moment.
@QuickGunF1: Renault claims their power unit is capable of 850bhp. We know they are aiming to halve the gap they had last year to Mercedes, which was a 10% deficit. So that would put the Mercedes in the region of 893bhp this year. Ferrari is probably somewhere close to Renault, but I suspect none of them are hitting those figures just yet - maybe later in the year when the final updates come.
@AbhishekChoudhury: JEV is racing in Formula E as well as the Ferrari job. But he proved himself in the lower series already, so working with Ferrari is probably better for his personal development and understanding of a modern F1 car. I think he also has an eye on Kimi's seat should the Finn's season not go to plan this year.
@Oliver: Those are probably high-end figures based on Renault's optimistic press release at the start of the season! But they are definitely obtainable figures given the advance in technology. The only problem is that they then hit the law of diminishing returns and it becomes hard and harder to get more power from the hardware.
Those figures are for ICE and ERS running at their full capacity.
@jimdenne: Last year's car was the same - it's actually been a feature of the Williams for some time now. What you see here in Barcelona is very likely to be in Australia.
@QuickGunF1: That's one of the big questions about whether 1000bhp really makes sense. It's more a marketing thing now that WEC cars are running in excess of that.