http://northeastdiesel.com Northeast Diesel Thu, 07 May 2009 13:08:15 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 http://northeastdiesel.com/2009/05/one-more/ http://northeastdiesel.com/2009/05/one-more/#comments Thu, 07 May 2009 03:41:27 +0000 admin http://northeastdiesel.com/?p=21 There is such a thing as an external combustion engine. A steam engine in old-fashioned trains and steam boats is the best example of an external combustion engine. The fuel (coal, wood, oil, whatever) in a steam engine burns outside the engine to create steam, and the steam creates motion inside the engine. Internal combustion is a lot more efficient (takes less fuel per mile) than external combustion, plus an internal combustion engine is a lot smaller than an equivalent external combustion engine. This explains why we don’t see any cars from Ford and GM using steam engines.

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