MFI 9 Junior was the first sales success of MFI and it was based on Björn Andreasson´s BA 7. MFI 9 Junior was first manufactured in Malmö and later on licenced manufactured at Bölkow in Germany (204 aircraft).
One reason that MFI Junior or MFI 9 became popular among the flying clubs was the good capabilities for glider towing.
The aircraft was on the small side. To solve this problem it was decided to build a bump on both sides of the cockpit to increase the room for the elbows. The wing construction was also reinforced and a more powerful landing gear installed. 47 aircraft was built in this version that was called MFI-9B.
Carl Gustav von Rosen in Biafra
“Disgusted at the suffering the Nigerian government inflicted on the Biafrans and the continuous harassment of international relief flights by the Nigerian Air Force, Carl Gustav von Rosen hatched a plan in collaboration with the French secret service to strike back at Nigerian air power. He imported five small civilian single engine Malmö MFI-9 planes produced by SAAB, which he knew could also be used for a ground attack role in warfare. He had the planes painted in camouflage colours and fitted with rockets from Matra, and proceeded with a crew of two Swedes and two Biafrans to form a squadron called 'Babies of Biafra' to strike the air fields from which the federal Nigerian Air Force launched their attacks against the civilian population in Biafra.”