I don't want to seem like a pain but I did teach this stuff in school for a while. Force and thrust and load are in pounds. When you multiply the force times a distance, you get foot pounds. Torque or moment are terms for that.
When a claim is made for a tractor's breakout or max digging force, the situation they are describing is where the FEL or backhoe bucket is pivoting about it's back edge. The hydraulic cylinders put a huge torque into the bucket, the back edge presses down hard against the ground, and there is big upforce available at the teeth. But raised off the ground, the down force moves much further away (like under the tires or stabilizers) so the upforce at the edge of the bucket is much less.
Another example might be to imagine carrying a 5-gallon pail of water along with your arm hanging straight down. You could reasonably easily raise it a couple inches at your wrist. But if you held your arm out straight, the torque at your shoulder would be pretty uncomfortable. Your whole frame would have to adjust.
As usual, prompt cheerful refund if unclear, confusing, misleading or otherwise bogus /forums/images/graemlins/grin.gif Take care, Dick B
