Which is most efficient - snatch block or snatch ring?

#snatchblocks #snatchrings #recoveryrings #efficiency

When you rig a double-line pull you are halving the effort required for the pull, but trading that against distance and time.  But, it's never exactly half, or a perfect 2:1 mechanical advantage. Energy is used to rotate the pulley, and also to form then deform the rope as it goes around the pulley - whether that pulley is a snatch block or snatch ring. 

But how much energy is lost? Do you end up with a 1.99:1 advantage, or 1.5:1? And what of the new snatch rings...are they really so inefficient they can't be used?  Watch this video to see the results of real-world 4X4 testing with three snatch blocks and six snatch rings...the definitive answer!

Tested

Rings
RED Winches
Saber
Factor 55
George 4x4
CampBoss
Drifta

Blocks
ARB
Ridge Ryder
"Crap"

Want to know more about pulleys, snatch blocks, snatch rings, mechanical advantage and 4X4 recovery?  Watch these:

Reverse winching https://youtu.be/nVnbPNyLu_c
Single block rigging https://youtu.be/oBYa28i_K9Q
Twin block rigging https://youtu.be/Z8kiz4bsaXk
The Snatch Block Myth https://youtu.be/s1h9whPOPn0

Post questions as comments!

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