FS98 CFS Swiss Air Force F-5B Freedom Fighter. FS98 CFS Swiss Air Force F-5B Freedom Fighter. The Northrop F-5 is an American supersonic lead in fighter jet which comes with excellent handling, reliability, visibility and economy. It entered service in 1963 and it remains in service with many air forces throughout the world. Original model developed by Paul Hartl. Upgraded with full moving parts and many other improvements developed by Stephan Scholz, textures painted developed by Udo Entenmann, adjusted flight dynamics developed by Andr Lederer.
