The conformal fuel tanks (CFTs) on this aircraft were also aerodynamic shapes only. When compared to production CFTs on Block 52+ and Block 60 aircraft the shape differences are apparent.

The "internal FLIR antennas" on this aircraft were aerodynamic shapes only, not real FLIRs. Part of the "ES" flight test program was to determine how different FLIR sensor locations affected airflow, especially those placed under the nose in front of the inlet.