redirect forces

Another approach to that is rig into a static sky hook set in the other 2 trees how different of force would it be between the static 2 dynamic lines? Would the pull be different on the 2 trees?
 
Side loading a rope isn't as much an issue as side loading your rigging points as far as I know. Your rope will sag all you let it then that pulls more on your rigging point. So I would assume the less sag the less pull. But there is likely some one who knows more.
 
The rope handles it the same. It's under tension and the load is exerted along it's length. The rope is in effect the force vector on the anchor points. What will reduce the ropes capacity is the type of knot and the bend radius through the pulleys.
 
The load on the 2 trees with your set up Kevin, is going to be more constant once the the load settles into the the "sky hook". Since the line running between the two tree is static essentially the load angles won't change much. In reality there will be movement of the "sky hook" since there is stretch in the line. Whereas two dynamic lines will see their angles change as the target tree is lowered.
 
I like to say if you are not sure about what the load is at certain angles try to keep the angle as close to 90 degrees as you can (71 percent of the load) for a track line angle. Although keep in mind that some climbers will get confused when it comes to a change of direction. If the line makes a 90 degree TURN at the change of direction, that point will see 141 percent of the load. Don't confuse the angle and the turn degree by mistake, it can make for a huge difference.
 
oh also loads placed on self equalizing anchors that have an angle of 10-30 can be trouble also during a load swing. you will greatly place more of the load to one anchor then the other with little movement. something to think about when you have a questionable anchor and that was the reason for two anchors.....
 
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