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How to make hydraulic powered robotic arm from cardboard

How to Make Hydraulic Powered Robotic Arm from Cardboard In this video I show you how to make robotic arm from cardboard, ...
New Atlas

Human-scale cardboard aircraft came surprisingly close to real flight

At first glance, a flyable airplane made of cardboard sounds almost like a joke – the sort of thing that collapses long before it ever leaves the ground. But YouTuber and serial tinkerer Peter Sripol ...