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f-22 raptor

Faulty vest valve blamed for F-22 pilots' hypoxia symptoms

The U.S. Air Force says it is it has identified the cause of potentially deadly oxygen deprivation problems experienced by pilots flying the F-22 Raptor fighter jet for years.

A faulty valve in pressure suits worn by pilots at high altitudes caused more than a dozen pilots since 2008 to experience dizziness, disorientation, and even blackouts, Pentagon spokesperson George Little told reporters today.

"I think we have very high confidence that we've identified the issues," Little said, according to an ABC News account of the news conference, before announcing the suspension of flight restrictions put in … Read more

NASA and U.S. Air Force eye chicken fat as jet fuel

Maybe it's to offset the high price of chicken, but NASA and the U.S. Air Force could soon be fueling their aircraft on jet fuel derived from recycled chicken fat.

Seventeen organizations are participating in Alternative Aviation Fuel Experiment II, or AAFEX II, to see if hydrotreated renewable jet fuel is a viable, eco-friendly fuel for jets.

"It's made out of chicken fat, actually," said Langley's Bruce Anderson, AAFEX II project scientist. "The Air Force bought many thousands of gallons of this to burn in some of their jets and provided about 8,… Read more