 Re: Convert me from Natural crotch to Arbor block
Another big minus for blocks is the doubling effect of the load at the pulley.
If you do as Quercus suggests you actually 4x the load at the pulley.
If you use natural crotch then other than the initial dynamic load the force on the lowering point is the weight of the piece. Graeme McMahon rigs out large sections and takes the wraps up in the tree to prevent the doubling effect. |