Ранее самолет N945NA участвовал в программе испытаний винтовентиляторной силовой установки Hamilton Standard с восьмилопастным винтом.
Progress with the propfan programmes is depicted by this photograph - the Lockheed PTA aircraft in flight with Allison propfan operating.

Progress with the propfan programmes is depicted by this photograph - the General Electric UDF installation in the MD-80