Magnetohydrodynamics-propelled boat
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Uploaded by mhdphilandjulia on Dec 19, 2008
Boat 1 was of rather substantial mass (.6655kg), as was Boat 2 (.748kg), so if we had made them lighter they would have accelerated faster. The building of these boats was one part of an extensive investigative project on the phenomenon of magnetohydrodynamics (MHD). In this boat setup, we used polycarbonate, neodymium magnets, and naval brass electrodes (slightly less corrosive than copper). We uploaded this video mainly as a brief reference to show our teacher how we plotted the position vs. time graphs (and afterwards differentiated them to get velocity and acceleration graphs). Hopefully if you are studying this phenomenon this video may help.
-Phil and Julia
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Uploader Comments (mhdphilandjulia)
All Comments (8)
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very cool.
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Congrats to you and to your teacher
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i didnt understad what u did.. but julie is nice :)
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how does this work? I think I might have had the same Idea. I hate it when I have a great Idea and someone has already done it. but anyways I'd appreciate it if you could tell me what this is.
tyeabrzannn 1 year ago
@tyeabrzannn The phenomenon is magnetohydrodynamics and it arises from the Lorentz Force Law, which tells you that if you intersect a magnetic field with a moving charge, that charge will experience a force (in the direction of the right hand rule, i.e. v cross B).
mhdphilandjulia 1 year ago 17
@tyeabrzannn The magnetic field in our project was supplied by two long neodymium magnets along the length of the channel on top and bottom (that's the silvery bar you see below the battery pack). For the charged particles part, we used electrodes (naval brass sheets) to line the sides of the channel, and since we used saltwater, attaching these electrodes to a battery pack would run a current (thus, charged particles) through the water. The Lorentz force propels the boat.
mhdphilandjulia 1 year ago 16
@tyeabrzannn We built this particular boat model and its channel ourselves out of polycarbonate and wanted to put the entire battery pack on the boat as well (so it was really heavy). It went much faster with a lighter battery pack but would have lasted a shorter time.
mhdphilandjulia 1 year ago 16