"Very frustrating" race masked Honda gains in Spain
Honda believes a "very frustrating" Spanish Grand Prix masked the progress it made with Toro Rosso after two troubled race weekends.
Toro Rosso's form dipped significantly in China and Azerbaijan after Pierre Gasly scored the best result of Honda's return to F1 with fourth in Bahrain.
Gasly made it into Q2 for the first time since Bahrain but was wiped out on the opening lap, while teammate Brendon Hartley recovered to 12th from a back-of-the-grid start after a complete car rebuild.
Honda's technical Toyoharu Tanabe told Motorsport.com the team had been helped by an analysis into its energy management after weaker races at two tracks with very long straights.
Tanabe said: "We learned from the start to the end, and also applied our analysis from the previous race. I think, technically, we had a reasonably competent weekend. The actual race result was very frustrating.
"It is difficult to measure [the improvement from the last race] because of the different track, if we go back to Baku and try it different we can tell you exactly in laptime and speed!
"We learned better energy management from Baku and applied several calibrations to maintain the race situation, so it looks OK."
Tanabe acknowledged Honda could only prove its progress "a time or position, which is important for us" but the weekend boosted confidence that the team is back on the right path.
Toro Rosso's Friday form was not strong in Spain and both drivers complained about the balance of the car, before changes applied from FP2 to FP3 on Saturday morning boosted its competitiveness considerably.
"Initially we applied something from the previous investigation," Tanabe explained. "Friday was not good, so we applied something different from what we learned, and we improved.
"It means we could understand directionally we are OK."
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