Horner worried Shield "rushed through" without proper testing
Red Bull boss Christian Horner has warned Formula 1 chiefs not to rush through the introduction of the 'Shield' cockpit protection system, ahead of its first public run on a Ferrari this weekend.
F1's Strategy Group and the F1 Commission decided earlier this year to prioritise development of the Shield concept instead of the original plan for a Halo.
While the Halo was run several times on track last year, the Shield will make its track debut in practice for the British Grand Prix.
The FIA hopes that the Shield can be readied in time for 2018, but if not then the Halo will be introduced instead.
Horner fears, however, that the Shield is being rushed through without all the "due diligence being done properly" and reckons a 2019 introduction would make more sense.
"There are all kinds of issues concerning it," said Horner. "I am not sure it has been through the same amount of testing as the Aeroscreen and Halo did and the catastrophic effect [of big parts hitting it] has to be taken into account.
"So I would rather get the job done properly for 2019 than rushing something through for 2018.
"We will be relying on the feedback from one driver in one set of conditions. It won't be dark, there won't be lights, there won't be loads of oil on it, and those factors.
"I am concerned this is being rushed through without all of the due diligence being done properly."
Additional reporting by Jonathan Noble
Empty chair for Lewis Hamilton as F1 hosts London Street Party and looks to future
Renault going "step-by-step" with Kubica
What the FIA must do to restore F1's credibility
OPINION: The first stage of the 2022 Formula 1 pre-season is just over a month away, but the championship is still reeling from the controversial results of last year’s finale. The FIA acknowledges F1 has had its reputation dented as a result, so here’s how it could go about putting things right
The six subplots to watch in 2022 as a new F1 era begins
As Formula 1 prepares to begin a new era of technical regulations in 2022, We pick out six other key elements to follow this season
Why newly-retired Kimi Raikkonen won't miss F1
After 349 grand prix starts, 46 fastest laps, 21 wins and one world championship, Kimi Raikkonen has finally called time on his F1 career. In an exclusive interview with Motorsport.com on the eve of his final race, he explains his loathing of paddock politics and reflects on how motorsport has changed over the past two decades.
Unpacking the technical changes behind F1 2022's rules shake-up
Formula 1 cars will look very different this year as the long-awaited fresh rules finally arrive with the stated aim of improving its quality of racing. We break down what the return of 'ground effect' aerodynamics - and a flurry of other changes besides - means for the teams, and what fans can expect
Why F1's new era is still dogged by its old world problems
OPINION: The 2022 Formula 1 season is just weeks away from getting underway, but instead of focusing on what is to come, the attention still remains on what has been – not least the Abu Dhabi title decider controversy. That, plus other key talking points, must be resolved to allow the series to warmly welcome in its new era
The Schumacher trait that will give Haas hope in F1 2022
Mick Schumacher’s knack of improving during his second season in a championship was a trademark of his junior formula career, so his progress during his rookie Formula 1 campaign with Haas was encouraging. His target now will be to turn that improvement into results as the team hopes to reap the rewards of sacrificing development in 2021
The “glorified taxi” driver central to F1’s continued safety push
As the driver of Formula 1’s medical car, Alan van der Merwe’s job is to wait – and hope his skills aren’t needed. James Newbold hears from F1’s lesser-known stalwart.
When BMW added F1 'rocket fuel' to ignite Brabham's 1983 title push
There was an ace up the sleeve during the 1983 F1 title-winning season of Nelson Piquet and Brabham. It made a frontrunning car invincible for the last three races to see off Renault's Alain Prost and secure the combination's second world title in three years