NASA has published a new study which concludes that using biofuels to help power jet engines reduces exhaust particle emissions by 50-70%.

The survey was conducted as part of the Alternative Fuel Effects on Contrails and Cruise Emissions Study (ACCESS) and was based on flight tests using NASA’s DC-8 test aircraft held in 2013 and 2014 near NASA’s Armstrong Flight Research Center in Edwards, California. The four-engined DC-8 was flown up to 40,000ft powered by a 50-50 blend of aviation fuel and a renewable alternative fuel of hydroprocessed esters and fatty acids produced from camelina plant oil. The emissions and contrails from the DC-8 research aircraft were monitored at distances from 300ft to over 20 miles.


21 March 2017