Boeing's F-15 Silent Eagle and European Aeronautic Defense and Space Company (EADS)'s Eurofighter Tranche 3 Typhoon came within the given budget of the F-X program, an industry source said, Friday.
Both nations operate the Eurofighter Typhoon as well as the F-35B Lightning II. The agreement is intended to eventually extend to the GCAP airframe when it enters operational service.