The next major version of the DDS' F-10S fighter has begun flight testing before a planned entry into service next year. The F-10SEP (standing for Enhanced Performance) will take over from the SIM in production by Q3 2110 if all goes to plan, or sometime in Q2 if there are no glaring problems.
The SEP has a modified wing to enhanced agility and fuel economy, various avionic improvements, an improved databus, stealth improvements especially in terms of IR signature and a modest improvement in the engines.
