Jun.10 (GMM) Several more races could pass before Red Bull is ready to race a McLaren-style F-duct system.

The Austrian team tested an early prototype of the downforce-stalling concept during the practice sessions in Turkey, but it is believed the F-duct will not re-appear at all this weekend in Montreal.

According to Finnish newspaper Turun Sanomat, the subsequent Valencia and Silverstone rounds might also pass without a race-able version of the F-duct fitted to Mark Webber or Sebastian Vettel's RB6 cars.

The report said the German round at Hockenheim could be the earliest possible qualifying and race debut for the Red Bull F-duct.

Before then, new iterations of the Turkey-specification F-duct could be tested in practice as soon as the forthcoming European grand prix at Valencia late this month.

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