Mercedes engines and F-ducts on Friday lead the speed through opening practice for the Canadian GP. As predictable at the unique Circuit Gilles Villeneuve, it was the most powerful engine related with the down-force-stalling 'F-duct' technology that looks the perfect package.Four Mercedes-powered McLarens and Mercedes cars monopolized the pinnacle four positions at the end of the morning 90-minute session, with Red Bull's Sebastian Vettel just fifth position.
"It is a circuit that should play to the advantage of the Mercedes-powered teams and the teams with the F-duct -- and we have neither!" laughed team boss Christian Horner.
Mercedes GP, who’s Michael Schumacher ran McLaren's Jenson Button close up for the top morning lap time, is believed to be running a more refined version of its F-duct system this weekend.
"When it works properly it is a very, very powerful tool -- and we are persevering with it," Ross Brawn said
