The SAAB 21 was a Swedish fighter/attack aircraft from SAAB that first took to the air in 1943. It was described as a very efficient weapons platform. It was designed as a twin boom pusher configuration, where the propeller is mounted in the rear of the fuselage, pushing the aircraft forward.
Read more about Saab 21: Design and Development, Operational History, Variants, Operators, Survivors, Specifications (Saab 21A-3)