CASA Northrop SF-5A Freedom Fighter – single-seat fighter version of the F-5A for the Spanish Air Force, manufactured under license in Spain by CASA. Initially designated as C.9 and until its withdrawal. The Northrop F-5 is a family of supersonic light fighter aircraft initially designed as a privately funded project in the late 1950s by Northrop Corporation. There are two main models, the original F-5A and F-5B Freedom Fighter variants and the extensively updated F-5E and F-5F Tiger II variants.
