An FIA statement said: “Following the eighth round of this year’s FIA Formula One World Championship, during which the phenomenon of aerodynamic oscillations (‘porpoising’) of the new generation of Formula 1 cars, and the effect of this during and after the race on the physical condition of the drivers was once again visible, the FIA, as the governing body of the sport, has decided that, in the interests of the safety, it is necessary to intervene to require that the teams make the necessary adjustments to reduce or to eliminate this phenomenon.”
The FIA has referred to two short-term means by which the technical directive will allow it to tackle the problem.
The first is described as “closer scrutiny of the planks and skids, both in terms of their design and the observed wear”.
This would suggest that any evidence of the underside of the car hitting the ground too aggressively could lead to instructions to alter set-ups, which could include the need to raise the ride heights that would mitigate the savagery of the impacts.
The second part is described as “the definition of a metric, based on the car’s vertical acceleration, that will give a quantitative limit for acceptable level of vertical oscillations”.
“The exact mathematical formula for this metric is still being analysed by the FIA, and the Formula 1 teams have been invited to contribute to this process.”
The timescale for the implementation of this metric has not been made public, although it is unlikely to be in effect during the Canadian Grand Prix weekend.
There is no lack of data for the FIA to refer to, as in addition to that gathered by the car the drivers also wear an in-ear accelerometer that can measure the forces they are subjected to.