Royalty Free Caloric Engine premium stock clip art

DESCRIPTION

Vintage engraving of a 19th Century Roper Caloric engine. A hot air engine (historically called an air engine or caloric engine) is any heat engine that uses the expansion and contraction of air under the influence of a temperature change to convert thermal energy into mechanical work. [b]View More:[/b] [url=http://www.istockphoto.com/file_search.php?action=file&lightboxID=10203398][img]http://www.walker1890.co.uk/istock/istock-mach.jpg[/img][/url][url=http://www.istockphoto.com/file_search.php?action=file&lightboxID=2789749][img]http://www.walker1890.co.uk/istock/istock-engraving.jpg[/img][/url]