"What we have here is a -NOT- 
failure to communicate!" by the great Beaufort T. Justice IIRC. Great discussion.
I learned sweating the rope by pulling sideways by accident, intuitively felling a medium tree many years ago. I grabbed the rope, considering trying to angle the fall a bit and when I pulled to the side - voila the tree moved real easy. Eureka.
I learned the multiplication of friction issue the hard way when I built a robotic mast with an internal cable and pulley system to raise and lower it. Tiny brass pulleys on steel drill rod shafts and tiny braided spectra "rope" probably actually fishing line. Mast refused to raise, 3 or 4 segment, can't recall. The first string segment at the drive motor was tight as a bowstring and the final segment of line was loose. Long story short, switched to micro ball bearing pulleys and the mast worked. Then we looked up why - multiply the friction loss proportion each stage you pass through. Who'da thunk all these years later it would come back to haunt me.
failure to communicate!" by the great Beaufort T. Justice IIRC. Great discussion.I learned sweating the rope by pulling sideways by accident, intuitively felling a medium tree many years ago. I grabbed the rope, considering trying to angle the fall a bit and when I pulled to the side - voila the tree moved real easy. Eureka.
I learned the multiplication of friction issue the hard way when I built a robotic mast with an internal cable and pulley system to raise and lower it. Tiny brass pulleys on steel drill rod shafts and tiny braided spectra "rope" probably actually fishing line. Mast refused to raise, 3 or 4 segment, can't recall. The first string segment at the drive motor was tight as a bowstring and the final segment of line was loose. Long story short, switched to micro ball bearing pulleys and the mast worked. Then we looked up why - multiply the friction loss proportion each stage you pass through. Who'da thunk all these years later it would come back to haunt me.
