The program included the X-26A Frigate sailplane and the motorized X-26B Quiet Thruster versions: QT-2, QT-2PC, and QT-2PCII.
Program ini termasuk sailplane Frigate X-26A dan versi bermotor X-26B Quiet Thruster: QT-2, QT-2PC, dan QT-2PCII.