Steam Powered Crane, 19th Century

Numéro d’image : 12626655
Steam Powered Crane, 19th Century
A steam crane is a crane powered by a steam engine. It may be fixed or mobile and, if mobile, it may run on rail tracks, caterpillar tracks, road wheels, or be mounted on a barge. It usually has a vertical boiler placed at the back so that the weight of the boiler counterbalances the weight of the jib and load. A steam engine is a heat engine that performs mechanical work using steam as its working fluid. Steam engines are external combustion engines, where the working fluid is separate from the combustion products. Water is heated and transforms into steam within a boiler operating at a high pressure. When expanded through pistons or turbines, mechanical work is done. The reduced-pressure steam is then condensed and pumped back into the boiler.
Licence : Droits gérés
Crédit: Science Photo Library / Science Source
Taille de l’image : 2885 px × 4800 px
Model Release : Non requis
Property Release : Non requis
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