Maybe I'm thinking of this wrong, but does #4 being 4.33:1 mean that - if all loss is in the pulleys - that those pulley's are 96% efficient!? Holy cow. Before I did all the other calcs, I looked up some typical pulley efficiencies, and was seeing numbers in the 85-95% range.
Edit: indeed there was some seriously stupid stuff going on with these numbers. See later posts for what I believe is the correct analysis.
Just doing a little back-of-the-napkin calculation here...
If each sheave in the system is 80% efficient, then for a system having 24 sheaves, the...
Does this mean you're going to rig up each stage sequentially, record the output force for each stage when applying 50kg (as measured with input load cell), and then multiply all the ratios together to obtain what the actual output would have been if you rigged them all up at the same time and...
Anyone tested the knotted version from the videos against spliced ones? I've wanted to muck with soft shackles, but didn't want to be fiddling with splicing. So, the idea in that vid looks pretty attractive.
Does anyone yet know if there were any warnings signs on the run-up to the failure? E.g., the gap between the two halves of the swivel growing larger, etc.?
Edit: I guess I know the answer to this already. Unknown, otherwise the users would have removed them from service immediately. I'm...
So you formed the choking loop (running bowline) around the stem at ground level, then hoisted it up to near the stub using the thimbles *prior* to tightening it around the stem? I think I get it, possibly.
I'm - as per usual - having trouble visualizing the choking configuration. Why could you not use the stub to run your pulling line up and around, add a running bowline, and choke the stem that way?
(y)on the non-e; never will put that alcohol stuff in the tank if I can help it at all.
You know what the Madsen's mods are, btw? Standard stuff like porting, timing, de-restricting, etc?