#7 Pulling Stumps With Snatch Blocks By Hand! 50:1 Mechanical Advantage Needed [4K 60FPS]
This is a 3 stage compound pulley system. It's a 5:1 simple driven by another 5:1 simple system in compound for 25:1. Then a doubling pulley to get to 50:1. I needed to recruit my wife to help me pull.