The Brno round of MotoGP turned out to be a veritable bonanza of aerodynamic developments. Honda turned up with their previously homologated fairing, and Yamaha debuted a new fairing with a modified upper half at the test on Monday. But it was Ducati who stole the show, with a radical new design featuring a large side pod which looked remarkably like a set of wings with a cover connecting them.
That fairing triggered howls of outrage from fans. How, they asked, was this legal? The fairing appeared to have two ducts which came out at the top at right angles, then return to the fairing at right angles. That turned out not to be the full shape of the fairing, when Danilo Petrucci sported one where the bottom half of the side duct extended lower. It seemed to be a blatant breach of the rules.
The problem, MotoGP Technical Director Danny Aldridge explained, lay in part with framing of the rules. When Dorna demanded a ban of the original winglets, they sat with the manufacturers to draw up a set of regulations which would limit aerodynamics and eliminate the risks, yet at the same time would allow some amount of development. That proved impossible to do with the manufacturers so split among themselves, and so Dorna had to try to come up with a set themselves.