(...) Is it because the extension side of the piston face has a greater surface area than the retraction side? The connection between the piston face and the piston rod accounting for the difference. Steve (19 years ago, 16-Aug-05, to lugnet.technic)
(...) This phenomemon is the reason why any pneumatic mechanism (such as steering) that you intend to stop in the middle (with pistons at the half way point) should always use two opposing pistons. This equalises the total piston area for each (...) (19 years ago, 16-Aug-05, to lugnet.technic)