The thinking is this will help keep cornering speeds down and hopefully reduce the turbulence coming from the back of F1 cars, allowing them to follow each other more closely.
However with the teams already deciding to get rid of them in 2011, it does suggest a feeling that double diffusers may hamper the quality of racing this year.
Most if not all teams are likely to have an interpretation of the double diffusers on their cars. Teams like Red Bull and Ferrari, who did not have them on their cars at the start of 2009, will be able to fully integrate the designs into the 2010 designs.
Providing the teams can agree on a suitably tightly-worded rule this time, I think the double diffuser ban is a sensible decision. As I wrote earlier this week:
The design of the cars has a serious effect on how closely they can follow each other. If that’s going to be improved, the FIA needs to look at long-term changes as well as quick fixes it can make in the next two months.
Electing to get rid of double diffusers at the end of the year, when everyone has ample time to design revised cars to meet the new rules, makes a lot of sense.
While they’re at it, can they also do something about the less consequential but still quite ugly pod-wings which appeared on most cars last year, despite hopes we were going to see the return of clean sidepods?