The F-15 Eagle is the latest jet fighter to receive the alternative fuels treatment, flying October 22 on a 50-50 blend of conventional jet fuel and an alternative—in this case made from specially processed animal fat: beef tallow bio-jet fuel.
Already, nearly the entire fleet of 40-plus aircraft flown by the U.S. Air Force has been certified to fly on jet fuels made from natural gas or coal—the exceptions being the drone aircraft that have been too busy abroad to be tested at home. The goal: "by 2016, to be able to replace up to half of the fuel used Air Force wide with an alternative blend that was both cost-competitive and had no worse greenhouse gas footprint than petroleum products," says Jeff Braun, chief of the Air Force's alternative fuels certification division.
By: Brant
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