Lewis Hamilton set the quickest lap-time in the second practice session for the Russian Grand Prix, while Sebastian Vettel stopped on track with a car problem on Friday.
Defending world champion Hamilton edged Vettel by .652 seconds.
Vettel was fast early on but came to a halt on the start-finish straight just before the halfway point of the 90-minute session, saying over the team radio he “lost electronics.”
Hamilton’s Mercedes teammate, Nico Rosberg, was top in the first session but was third in the second, .867 seconds behind Vettel.
Daniel Ricciardo successively tested aeroscreen cockpit protection system in an installation lap early in the morning session.x
F1 wants to improve drivers’ safety from 2017, and the aeroscreen is the second model tested, after the so-called halo developed by Mercedes was used by Ferrari’s Kimi Raikkonen for one lap in pre-season training.
Red Bull also posted videos in their website of static tests, with the screen being hit by a wheel and a 1-kilo projectile at more than 220kph.
Kimi Raikkonen set fourth fastest ahead of Ricciardo, 1.501s off the pace set by Hamilton. Williams’ speedy Bottas and Kvyat made sixth and seventh respectively, separated by just two-tenths of a second.
McLaren shows an encouraging performance with Jenson Button’s pace; he ended second practice in eighth place. Felipe Massa and Fernando Alonso rounded out the top 10 positions.
Near the end of the session, Manor’s Pascal Wehrlein stopped on the track, too, telling his team he suffered a power failure.
In the morning session, championship leader Rosberg led Hamilton by .722 seconds. Vettel was third fastest, trailing Rosberg by 1.048, with this teammate Kimi Raikkonen in fourth, and the Williams of Felipe Massa in fifth.