American racer Santino Ferrucci admits he struggled to adjust to Haas VF17 when he took to the track at the Hungaroring on Tuesday morning.
Swapping his Trident Formula 2 car for an F1 machine for Day One of the two-day Hungarian test, covered 102 laps of the 4.381-kilometer circuit.
His best time for the day, a 1:21.185, put him 10th of the 12 runners present, some four seconds behind Ferrari tester Charles Leclerc.
"This morning I struggled a lot to adjust to the car," Ferrucci said. "It’s a lot different to anything else out there, especially the F2 car.
"It took three or four runs before I was acclimated and happy with how I was in the car. In the afternoon, we made really good changes.
"At the end of the day, I was able to push a bit more and work on my own driving to where I now feel like I’m using almost 95 percent of the car to its optimum.
"Tomorrow, I’m really looking forward to getting on some supersoft tires and doing some qualifying runs."
Ferrucci will be back in action on Wednesday, the final day of testing.
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