The boys are in Sheffield for the day.   

Stuart has found the most powerful working Steam Engine in Britain. Don’t be deceived it’s as high as a three storey building.

 
1200 horse power from three giant cylinders that are over a meter in diameter. When it runs a full speed the whole building shudders.

A Bessemer converter. Several tonnes of steel and fire clay balanced above Jorge. When running there would have been flames and sparks shooting out of the top.