Block 1, with three pulleys 3, 4 and 5 rotating about axes B, C and D, is hung at fixed point A. Block 2, with three pulleys 8, 7 and 6 of sizes equal respectively to those of pulleys 3, 4 and 5, and rotating about axes K, F and E, carries hook L from which load 9 is suspended. Flexible link (rope) 10 has one end attached to hook Q of block 1 and runs consecutively over pulleys 6, 5, 7, 4, 8 and 3. When the other end a of link 10 is displaced a distance s, load 9 is displaced the distance S =s/6. Thus the 6 mechanical advantage equals 6.
$3559$CFL,MH$