Embraer and GE recently held a series of test flights in an E170. The tests, flown out of Embraer’s Gavião Peixoto facilities, benchmarked the operational characteristics of the airplane and its GE CF34-8E engines when powered by HEFA (hydro-processed esters and fatty acids) fuel under a broad range of unique flight conditions. The flights involved powering one of the two GE engines with the maximum ASTM permissible mix of 50 percent jet-A and HEFA derived from camelina. Commonly known as wild flax, camelina grows wild in Northern Europe and Central Asia; it was introduced recently in the U.S. as a cattle and chicken feed supplement.
“HEFA fuel is a sustainable alternative fuel option, meaning this type of synthetic fuel is produced from renewable feedstocks that also reduce total greenhouse gas emissions. It has demonstrated its ability to be a possible alternative fuel for aviation use. It should be pointed out that it is not the only sustainable alternative fuel option as there are multiple alternative fuel offerings that have the potential to be used in aviation, but this is definitely a good, viable option,” Mike Epstein, leader of alternative fuels for GE Aviation, told AIN.