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I have heard of him, but i don't have his books and haven't memorized his works. So there is the rough formula, cool.

Yeah I've never seen that formula, it doesn't account for anything and I'm not sure how anyone came up with that. A falling body is constantly accelerating (at 32 feet per second per second), so any force calculation is far more complicated and exponential than that (it's called impulse in...

And no one said that line stretch is a bad thing. If you are natty crotching, and it's snubbed off, it's a fall factor of 2. I natty crotch a bunch, and run lines that can take the abuse, either arborplex or treemaster 3 stand. Having said that, you need to know the limits of that, and fall...

While if you are using blocks, since there's more rope in the system so it's not a true factor 2 fall, even though I think I've seen studies that show that the end takes far more abuse and stretch than the rest of the rope. Using natural crotch and the new friction devices such as the rings and...

When we are using different things to rig with, they all have different breaking ratings. So, how could we ever use them safely to do different tasks? The accepted method to add engineering tolerances and acceptable life cycles is to use a wll. Not all wll are the same, it depends what the use...