I was setting up my jigger and wanted to see what set up to use, so I pulled out my highly accurate hardware store fish scale to do some tests.
For weight I used a 5 gallon bucket with random stuff in it.
Up force is the force to start upward movement of the bucket.
Down force is the force at which the bucket begins to lower
Pulleys are CMI double micro bushing pulleys and PMI double becket (sp?) single pulleys.
Bucket Weight: ~27 lbs
Pulley system: 2:1 (One PMI single)
Up Force: 17 -18 lbs
Down Force: 11 lbs
Pulley system: 3:1 (One PMI single and One CMI micro double)
Up Force: 16 -17 lbs
Down Force: 5 lbs
Pulley system: 4:1 (Two CMI micro double)
Up Force: 15 -16 lbs
Down Force: 2 lbs
Bucket Weight: ~37 lbs
Pulley system: 2:1 (One PMI single)
Up Force: 22 -23 lbs
Down Force: 17.5 lbs
Pulley system: 3:1 (One PMI single and One CMI micro double)
Up Force: 21 -22 lbs
Down Force: 6.5 lbs
Pulley system: 4:1 (Two CMI micro double)
Up Force: 21 -22 lbs
Down Force: 4 lbs
I’m too lazy to figure out the loss for each pulley. For now I’m going to set the jigger up as a 3:1.
L.J.