Рет қаралды 60,901
When we posted the first video, we were really surprised at the response, at this point the original video is approaching 800k views. The comments were amazing. A percentage of them were about safety.
We designed and built this emergency brake modeled in a way after the original braking system designed by Elijah Otis. We don’t use a ratchet system or teeth because we don’t have that capability. We designed a system that is actuated if the hoist rope loses tension for any reason. If this were to happen, “jamming rods” will be pulled downward on one end, and pivot upwards on the other end. The upward moving side of the rods will contact the soft rough sided cedar planks we attached to the inside of the rails. The friction between the rough wood and the sharp edges of the jamming rods causes the rods to grab the wood and travel further upward as the carriage tries to travel downward, and the carriage jams between the Unistrut rails lined with the wood planks.
To test it, we engaged the brake and placed 300lbs of sandbags on it and it didn’t budge. Pretty cool. I hope you enjoyed the video and watch for our next one when we load it up with 300lbs of sand again, tie it off with a rope and then cut the rope to see what it does in an actual free fall possibility. Should be interesting. As always, please note that we are not experts. When we do this ourselves and use it ourselves, we know what we built, and we watch for any safety hazards. Please be very careful if you decide to do anything we talk about in our videos. Be safe and overbuild for strength. Thank you. Brian and Mitch