zipline - swinging limbs HD

Watch in HD setting. The video shows a controlled zipline, with the incentive being to maneuver/swing branches out of a confined area into a more open dropzone. In order for it to work you need to adhere to several points - The first is to establish a high-rigging point and an unimpeded (or as good as) route from the zipline to each individual limb. This usually means starting/removing the limbs around the rigging point and systematically working downwards. The slings are positioned between about two thirds along the length of the branches....which gives them support as they swing around before breaking free from the main stem. The ground anchor must be as far away as possible in order to guide and support the limbs as they swing around. The ability to take up slack at the ground anchor is a must....again to guide and support the limbs as they turn. The limbs on this alder were not heavy, so Bob the guy on the ground was able to muscle the line and manage ok. For bigger limbs though more help would be needed, or perhaps incorporate a 2 or 3:1 mechanical advantage to compensate for the extra weight. Big or small tree though, the principle of the technique remains the same. This was not a big tree by any means, but we made light work of it as you can see, and were easily able to turn the limbs 180 degrees at times. Footage is a little weak at first but gets better.