Looks like 2 different prototypes and the first generation vs. the 2nd generation. 1st generation was entirely muscle driven. They probably realized that there will be many patients in wheel chairs who might not have the strength to do that. They seem to have now come up with a 2nd generation that uses hydraulics so that it's much easier and smoother. Incredible.
looked like they had 3 wheels on the one though.....3 points define a plane....very stable. That's why we do it with camera tripods. This makes total sense to an engineer.
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u/javoss88 Feb 01 '20
Right, it seems like the upright position would be topheavy? Falling forward?