Testers at Edwards AFB, Calif., are blasting volcanic ash through a C-17’s Pratt & Whitney F117 engines to test if, and how, aircraft could safely skirt eruption plumes. An Icelandic volcano in 2010 caused the Air Force to reroute flights in and out of Ramstein AB, Germany, and badly disrupted commercial air traffic around Europe. Agencies, including NASA, the Air Force, and several industry partners, launched the Vehicle Integrated Propulsion Research to explore ways of monitoring engine health and increase safety—including volcanic ash research—the same year. Since then, three tests using a pair of highly instrumented engines have been conducted, culminating in the July 9 test, according to Edwards’ release. “We can detect how the volcanic ash in many ways is affecting the engine real time, so we can also begin to develop the diagnostics capabilities,” explained NASA’s researcher John Lekki. “This test will definitely help us take the next step in understanding if we can fly close to these plumes,” added Air Force Research Laboratory researcher Jack Hoyning.
If the Air Force is in line for a big budget bump from President Donald Trump’s proposed $1.5 trillion defense budget in 2027, the head of Air Combat Command said he would make aircraft spare parts his top spending priority—but cautioned that more money to buy parts won’t equal a…
