As a result, in May 1940, it was decided that a dive-bomber using the good aerodynamics of the VI-100 would be designed and put into production. The new aircraft, now designated the PB-100 ("Pikiruyushchiy Bombardirovshchik" — "Dive-Bomber"), was required to achieve a maximum speed of 535 km/h at an altitude of 4800–4900 m, a range of 1,600 km at an altitude of 5,000 m, and a ceiling of 8000 m. Petlyakov and his team were instructed to redesign the two-seat high altitude fighter into a three-seat dive-bomber within 45 days. In order to meet this deadline, Petlyakov's team were assisted by some 300 specialists from other OKBs.