Red Bull's route to preparing for 2016 was fraught with indecision over its power unit.
It is invariably a team that leaves a new car's completion until the last minute anyway, so expect the RB12 to change a great deal over the two weeks of testing.
The car has shown some of its secrets so far, but there is also evidence that Red Bull is holding its final specification back to maximise development time and exploit all possible gains in the windtunnel.
The perfect Formula 1 car from 2016 Mercedes swept all before it again in 2016, but it was not the perfect car - take some bits from rival teams and you'd have quite the potent racer... F1
F1's new development war has already begun The last grand prix weekend before the winter offered teams a great opportunity to get a headstart on work for 2017 F1
F1 teams still pushing with an eye on 2017 The F1 development race hasn't slowed down as much as expected in the final races of the current rules cycle, with teams still pushing to maximise running before the winter break and Mexico-specific solutions on show this weekend too F1
A glimpse at McLaren's 2017 work at Austin? McLaren struggled at Suzuka, but on Friday at Austin it introduced developments to its MP4-31 that could well have next season in mind F1
The big questions for F1 2020 2.0 Formula 1 will finally get under way with back-to-back races in Austria, but the championship has been forced to make tough choices to ensure it can function responsibly while COVID-19 continues to ravage the planet. Ahead of the first race, BEN ANDERSON explains the key aspects of F1 2020 2.0 F1
Why 2020 will be a defining year for Vettel One of the most significant stories during Formula 1's lockdown period was the news Sebastian Vettel will be leaving Ferrari at the end of the year. But there's still one more - potentially awkward - season with the Scuderia ahead of an uncertain future F1
Is Red Bull F1's only hope of a Mercedes challenge in 2020? As Ferrari seems to have lost its way, it's for Red Bull to take up the cudgels against Mercedes. And it's ready for the fight in a way we haven't seen since its championship-winning heyday F1
The new rules of F1's tech war Nobody really knows how much will have changed on the Formula 1 cars during the recent months of inactivity, but there can be no doubting the rule changes made in the name of cost saving mean the game will be played differently this year and next F1
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