Used Jcb Telehandler Canada How Can I Work Out The Forces Required In An Hydraulic Arm Like A JCB Arm?

How can I work out the forces required in an hydraulic arm like a JCB arm? - used jcb telehandler canada

I'm trying to create a hydraulic arm with gas shocks in the same position as an arm of the JCB, but you do not know, are the calculations needed to develop the forces and distances. Can anyone help?