We have a museum here in Mulhouse France where they cut open a locomotive and added LEDs in blue and red to show the different tubes and exchange of heat. Quiet

We have a museum here in Mulhouse France where they cut open a locomotive and added LEDs in blue and red to show the different tubes and exchange of heat. Quiet interesting and helped me to understand how it works. Here an image of it: https://upload.wikimedia.org/wikipedia/commons/8/8d/Cite_du_Train_Mulhouse_2014_082_%2815952923997%29.jpg https://upload.wikimedia.org/wikipedia/commons/8/8d/Cite_du_... Edit: Typo