The P&W also failed to deliver its rated power as it put out only 738 hp, and top speed was again well below 300 mph. Whilst more expensive than the Curtiss and Vought designs, the Seversky was a clear winner of the Air Corps' competition, with an order for 77 P-35 fighters and spare parts equivalent to eight airplanes being placed on 16 June 1936 at a cost of $1,636,250. Modifications from SEV-1XP to production P-35 standard included partial instead of complete mainwheel fairings and seven degrees of dihedral to the outer wing panels.