I heard this idea that some guy said once on a FB wall that McLaren uses an engine without a crankshaft and instead uses magnets. Imagine a cylinder head and on top of it there is a magnet and also a magnet on the bottom, both are charged the same (+ or -). Then the piston would be charged the same as the magnets so they would be pushing the piston away and making it move up and down. Does it exist? Is it even possible? I think that would be very interesting to see and in my mind the benefits of that would be a lighter engine, because no crankshaft. Any other pros maybe? What do you think the cons would be?
This is how i imagine it:
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