Scissor-Lift Column

September 26 2015: Finally I have completed the design of the central column of the Earth Antenna. Having tried many variations on the theme, I have settled on pneumatic pistons positioned at regular intervals up the column – the reason being that it brings additional stability along the structure. Motorising this (with vertical actuators) brought too much weight, additional movement, and complication, so I switched to pneumatic pistons. Pneumatic pistons can have their power source far away, and as a result more can be used without disrupting the stability of the mechanism.

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