Oh...if I did it wouldn't be the first time!
Nothing in the GCR implies a floorpan must be a 'single piece'. On the contrary, the glossary starts the "floorpan" definition with the words "The section(s)...", which clearly implies it may be a multi-piece device making up the floorpan. Just as "A carburetor" is an assembly of pieces, a floorpan may be as well.To reiterate:
R. Pare
...can the diffuser be split into two 47.5cm wide openings...?
Response: Stan:
Section 9.1.1.C.6. reads "A diffuser is permitted behind the front of the rear tires." The term "A diffuser" is singular, so I would think two diffusers are not legal.
If that is the logic flow that is to be used, then any car with a 2 (or more) piece stressed floorpan would be illegal.
F1000 rules, B.1.4 : "A stress bearing floorpan/undertray is permitted.......[/i]
Furthermore, there is nothing in the definition of an undertray or a diffuser which implies that it must be a single piece, and in fact they are NORMALLY an assembly of pieces. That said, what you specifically asked above was if I considered "two 47.5cm wide openings that are separated by a whatever-wide dropped section in between" to be legal. The key word is "two". That doesn't imply to my mind that it must have a "flat roof"...just as it doesn't imply that it has to have flat-vertical walls. But it does imply to me that one may not have two separate diffusers.
I cannot support this. For those who are not reading carefully, what Richard suggests here would open up diffusers to permit widths above the opening (when viewed from below) that could bulge out to whatever width would fit between the rear tires or 150 cm, whichever occurred first, so long as the bottom opening was no more than 95 cm wide.I would propose, therefore, that the rules be amended to state that the width of the diffuser opening as viewed from the underside be a maximum of 95cm wide for its full length, from the leading edge of the rear tire to its rear edge.
Stan