I am designing a block and tackle system to haul wood up a ramp onto my porch. The issue I am having is that the rope seems like it will rub against the top of the ramp and cause it to fray. How can I prevent this from happening?
Here is how I would solve this in true bodge-job fashion:
- 2x bricks, the type with holes in
- 1x short section of broom-handle
- 1x short plastic pipe, or toilet-roll tube (bigger than broom handle)
- 2x pencils, or bits of string, or something
- Put the pipe over the broom handle such that it can rotate freely
- Support the broom handle in the holes between the two bricks
- Optionally drill holes through the ends of the broom handle and put a pencil through it, to stop it sliding sideways and dropping out of the holes. Alternatively put a bit of string through it and tie to the brick, or anything really.
Place the roller at the apex of the hill. The rope will roll over the roller then lift off as the truck gets to the top. The truck will drive over the top of the roller assembly as you pull it onto the flat section.