NASA DC-8 before a test flight
NASA DC-8 before a test flight
During the research flights, the four CFM56 engines of the DC-8 alternated between regular JP-8 jet fuel and a one-to-one mixture of JP-8 and the biofuel HEFA (Hydroprocessed Esters and Fatty Acids). HEFA is obtained from the oil of Camelina plants.
