Скачать с ютуб Unassisted Mast Climbing using an GriGri with voice over. в хорошем качестве

Unassisted Mast Climbing using an GriGri with voice over.

Using a GriGri to climb a mast. This is a voice over of my other video. It is otherwise the same. Please visit https://L-36.com/more_mast_climbing.php for details on the method. Please be advised that this is a bit complicated and I do not recommend it and no longer use it myself. Please see    • Ultimate Unassisted Mast Climbing   for the method I use now. I am amazed that people who should know better do not understand the mechanical advantage of a pulley system. Not just the commenter below but even a physics professor I know! There are simple rules. "Count the number of lines that get shorter". In the case of this system count the number of lines that are holding you up. There are three. Two to the GriGri and one in the hand of the climber. Each line has 1/3 the climber's weight so the system is 3:1. But the efficiency depends on friction and the GriGri has a lot of friction. I measured the friction at about 60% so roughly the system has about the same net advantage as a 2:1 system even though it is 3:1. How about that for confusing it even more? Regardless, It is easier than the standard 1:1 methods.