On Aug 20, 9:19*pm, "Existential Angst" wrote:
Awl --

I made a setup of double compounds pulleys (National brand), with one block
having 2 sheaves side-by-side (one axle), and the other block similar.
Thus, 4 ropes are traveling between the two. * There is a considerable
length of rope between the two blocks, on the order of 4 feet.

The Q is: * How to keep these ropes from twisting around each other?
When the ropes twist around each other, very high friction results.

One block is fixed, the other travels, so I suppose the traveling block
could have its axle extended on both sides, and run through some kind of
channel/guide. *That's the only answer I see.

Unless it's the rope I'm using that's causing problems, and mebbe aircraft
cable would be better behaved.

Idears?
--
EA

Use braided rope.

jsw