Moose wrote: ↑01 Mar 2018, 02:38
Just_a_fan wrote: ↑28 Feb 2018, 22:30
It was brought in to stop teams using certain parts to directly generate downforce.
It wasn't - it was brought in to stop double diffusers. by not allowing you to see bodywork through any cut in the floor, you could no longer put a top on the second diffuser.
No, it was introduced much earlier.
FIA Technical regulations'1994 wrote:Between the rear edge of the complete front wheels and the front edge
of the complete rear wheels all sprung parts of the car visible from
directly beneath the car must lie on one plane. All these parts must
produce a uniform, solid, hard, rigid (no degree of freedom in relation
to the body/chassis unit), impervious surface, under all circumstances.
The periphery of the surface formed by these parts may be curved
upwards with a maximum radius of 5cm.
Probably since 1983, when flat floor rules were introduced.