During September 1949, the Swedish Air Force, via the Swedish Defence Material Administration, released its recently formulated requirement for a cutting-edge interceptor aircraft that was envisioned to be capable of attacking hostile bomber aircraft in the transonic speed range.
Durante o mes de setembro de 1939 a Forza Aérea Sueca, a través da Administración de Materiais da Defensa Sueca, publicou o requerimento para un interceptor vangardista que foi concibido para ser capaz de atacar bombardeiros hostís a velocidade transónica.