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. It now turns out the engines are supplied by Ford. Boeing is using a 2.3L supercharged four-cylinder that Ford has been using in experimental Ford Focuses for the past several years. The engines have been tested running continuously for four days under conditions simulating flight at 65,000 feet. The HALE aircraft is designed to fly for up to seven days at a time.
[Source: The Telegraph]

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