Boeing is currently working on a new unmanned high-altitude spy plane fueled by hydrogen. Unlike some other recent fuel cell-powered research planes this one uses internal combustion engines.

This is where hydrogen ... altitude,” explained Nicolas Noiray, professor at ETH Zurich, in the press release. In addition, the researchers can recreate the acoustics of various combustion ...

"Our facility allows us to replicate the temperature and pressure conditions of an engine at cruising altitude ... of ...

The task of an high-altitude simulation test facility is to provide this ... The steam is then accelerated to supersonic speed in the ejectors of the vacuum system, drawing the combustion gases from ...

GE Vernova Inc. has completed a successful validation test campaign for its advanced Dry Low NOx (DLN) hydrogen combustion ...