This is pretty funny. I just did this demo two weeks ago at work. We had two motors that were neck and neck for a project, then when we put them both in am alum

This is pretty funny. I just did this demo two weeks ago at work. We had two motors that were neck and neck for a project, then when we put them both in am aluminum housing, one drew 50% more current at full speed idle. I found both this demo, and the demo of dropping a big magnet on to an aluminum sheet. I for sure need to play more with magnets, In fact I am lusting for the big magnet that jacquesm talked about.