Steve, help yourself, if you blame me I'm going to deny it
Don't know if it'd be of any help but this gets into some of that.
http://windyhilllogworks.com/Calcs/linepullclc.htmYes on the teachers, most have been since school and I enjoy their classes.
I checked the chart I posted above from the Army Rigging Manual. It appears to check for me using some pretty nice spruce poles just about vertically. The table says they can be tipped down to 45 degrees at the stated load. I'll be behind the truck, unless I'm seeing it wrong they seem to be more optimistic than I'm comfortable with.
