The FIA knowledgeable groups on the finish of June that it might be transferring to decelerate pitstops on security grounds, eradicating some parts of automation.
It was a transfer that Horner stated on the time would “dilute” the occasions achieved by groups within the pits, however the FIA brought the clampdown into force from the Belgian Grand Prix.
In final Sunday’s Italian Grand Prix, Purple Bull – routinely the quickest group within the pits – struggled to finish its servicing of Verstappen in its traditional sub-two second time attributable to a difficulty on the front-right wheel.
It resulted in an 11-second pitstop that dropped Verstappen again, finally leaving him on the identical little bit of monitor as title rival Lewis Hamilton simply moments earlier than their collision.
Horner stated after the race that the sluggish pitstop was an “uncharacteristic difficulty” that will must be investigated, however has now revealed that it was a mistake that resulted from the FIA’s technical directive.
“There was a uncommon human error in our pitstop, because of the brand new technical directive however nonetheless one thing we have to study from,” Horner wrote in his common column for the Purple Bull group’s web site.
“That sluggish cease put Max out of synch from the place he ought to’ve been on monitor. Mercedes compounded that scenario as they faltered with their very own cease on Hamilton’s automotive, which meant each drivers had been neck and neck.
“Each drivers knew they wanted to be forward due to the problem to overhaul. Max was eager to grab the momentum and Lewis was wanting to retain monitor place.”
Max Verstappen, Purple Bull Racing RB16B, and Lewis Hamilton, Mercedes W12, collide
Picture by: Jerry Andre / Motorsport Images
Sochi penalty “not such a handicap”
Hamilton and Verstappen collided on the first chicane moments after Hamilton had exited the pits, with the crash ending each of their races.
Each drivers blamed one another for the incident, however the stewards dominated that Verstappen was predominantly in charge, resulting in a three-place grid penalty for the Russian Grand Prix in Sochi.
Horner’s rapid response to the crash was that each drivers might have given one another extra space, and he was unchanged in his opinion, feeling the FIA might have made a stronger assertion by penalising each drivers.
“I nonetheless share the identical perception immediately: each performed an element in it and it’s tough to apportion blame to at least one facet greater than the opposite,” Horner stated.
“If the FIA wished to make an announcement, they may’ve imposed the identical penalty on each drivers however the fault was deemed to be extra on Max’s facet and, as a result of he didn’t end the race, the one possibility was to offer him a grid penalty, which we settle for.”
Horner added that taking the penalty in Sochi can be “not such a handicap” for Verstappen due to the long term to the primary braking level, however was braced for Mercedes to be sturdy once more.
“I used to be wanting via the outcomes on the Russian Grand Prix and again in 2018, Max went from final to first earlier than needing to make his pitstop,” Horner stated.
“We had been second there final yr however it’s a circuit we now have by no means received at. It has been a Mercedes stronghold.
“For me, Monza and Sochi, I’ve them marked down mentally as Mercedes circuits so it will likely be a problem.”