This is what I think about this "diffuser case". If the Brawn, Toyota and Williams diffusers comply with the rules, it would be wrong, and dangerous to the sport, to ban them because they don't comply with the rules' spirit.
The actual case was on the interpretation of the "holes" in the gap between the reference plane, which is regulated, and the diffuser-zone behind the rear wheel centreline.
But as for banning "because it's against the spirit", well - they did that often enough in the past. Michelin's 2003 tyres were within the regulations and outlined testing-procedures, but were banned because expanding tyres were "against the spirit" of the limitations (though, in this case, a serious safety risk), as was the 1978 Brabham BT46 Fancar, the Renault's mass-dampers, Williams' early-winter 2001 diffuser (which was similar to the current Brawn ones!), Ferrari's flexible wings - and later flexible floors. All despite conforming to the regulations currently at work.
Let's not forget that the diffusers were declared legal by Charlie Whiting befoe the season began, and by two sets of stewards at the Australians and Malaysian Grands Prix.
Two potentially incorrect declarations don't make a right. The Renault mass-dampers were declared legal by every stewards from it's introduction somewhere in 2005, up to and including the German GP 2006. By then, it was also a feature on the Ferraris and other cars. Didn't stop the FIA from declaring it illegal.
Photoshop. AtlasF1 forums show the original:
Are there any rules for wheelbase length
Yes, but you don't have to change the wheelbase - just the way the suspension itself is designed. If the mounts are moved forward, and the suspension itself "tilts" backwards, you maintain the same wheelbase.
Yes, but all we know is that Renault and Red Bull asked about the diffuser design. What we don't know is the specifics of that design; for all we know, the proposed diffusers were similar to those run by Brawn, Williams and Toyota but were different enough that they were outside the rules. I doubt Red Bull and Renault will give details of the design they were looking at since they're playing the double standards card.
You also have to consider the context this is in: for the first time in years, a team other than Ferrari or McLaren have proven that they can consistently win in Formula One, and I imagine it would have brought about a massive boost in ratings, particularly considering the idea that three months ago Jenson Button was almost out of the sport entirely and now he's leading the World Chamionship. The FIA have to do what is in the best interests of the sport, and declaring the diffusers to be legal may well have fallen in line with that agenda even if they would have been declared illegal if it were Ferrari or McLaren who had made them. If the FIA banned the diffusers and forced Brawn, Toyota and Williams to re-desgn their cars - and quite possibly amending the results of both the Australian and Malaysian Grands Prix - public interest would decline rapidly, with even a lot of long-standing fans of the sport rebelling because of the politics taking precedence over the actual racing. So if I were the FIA and my choices were to rule that the diffusers were legal and keep interest in Formula One going or to enforce the rules and regulations, change the results and risk a massive public backlash that would overshadow the new regulations designed to make the sport more competitive, I know which one I'd take every day of the week. Yes, I'd be a hypocrite, but the FIA cannot risk the future of the sport just to keep a handful of teams happy because they didn't think of a particular part the wa the others did.
Actually, now that spirits and stuff officially don't exist anymore (they used to use this argument quite often in the past), all sorts of interpretations will now have to be
technically legal. However, the decision was made in order to make some teams happy - just not the complaining teams. I'm not claiming this was the main factor for the decision... But look at the Diffuser-Three teams: BrawnGP/Honda was very nearly out of the sport just a month and a half ago. Toyota is under constant threat from management, and finally successful. Williams is nearly bankrupt, and losing sponsors every day. Telling these teams to bugger off and redesign their cars, and telling them their victories and podiums meant nothing, would've forced them out of the sport.
More than double the downforce? Do you have links to proof of that?
The interviews by Flavio, Byrne and Vasselon all talked about "from 15% diffuser-generated downforce, to 40%." Also, unlinkable, are Craig Scarborough's RCE articles. Considering you have far more volume, and more speed through the diffuser - thus lower pressures, that makes mathematical sense. Such an increase in downforce would correlate with the calculated 0.8-1s advantage enjoyed by these teams (race-pace, not qualifying). Remember, the diffuser is half the deal: As soon as you have more rear downforce, you can finally add downforce at the front without messing up the balance. The Renault, McLaren and Ferrari all use very simple front wings, simply because having more downforce would only create a bad balance.
Now that I think of it... Back in May 2008, an insider on F1Technical posted that Honda, apparently, already clawed back 80% of their 2008 downforce. We had a good laugh saying that 80% of their 2008 downforce could very well mean no downforce at all - but look what happened after all...