Jim Herber is 64 and still owns the Cushman Eagle motor scooter that he rode along the dirt roads of Sandusky, Ohio, when he was 13. The paint has faded, and the original tires have weathered a bit ...
In specific applications, jet engines are often the most efficient internal combustion engines available. Not just for airplanes, but for anything that needs to run on a wide variety of fuels, operate ...
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