Pulley Radius: how to factor this into calculations?

[artdutra04]

Originally Posted by LLogan

I don't know much about the cable other than the fact that it is 1/8inch in diameter and was taken from one of our mentors' planes.

How many strands does it have? The more strands it has, the more flexible it'll be.

[Teched3]

Minimum bend radius is very important - the more strands, generally the smaller the acceptable radius. Have you investigated Spectra cord? Very flexible, light weight, and stronger than steel cable for a similar cross section. Teams have been using it for years.
Here's an EBay item number to 1/8" cord at a very good price---180614836330

[IKE]

If you must have that small of a pully, you might want to look into Spectra or other performance kite strings. You can get a roll of 450 feet for about $100. Really great stuff.