What is the best technique to lock a trucker's hitch in a strong way that's also easy to release, but most important, that doesn't loose any (or the least amount of) tension in the line, when I lock it?
I tie two half hitches, with the second one being slipped. I don't have any trouble with tension, and it's easy to remove later.
I only tie one slipped half hitch(pulled really tight) but do a daisy chain after it. The loop created by that one slipped half hitch is the loop that starts the chain.
To keep it secure while I'm finishing the lock, I just pinch the rope around the midline loop and work the slipped half hitch w/ one hand. Once the slipped half hitch is tight and there are 2-3 'chains' after it, the load is held very securely.
This has two major benefits.
- To undo it, pull the loose end. Everything just cleanly falls apart.
- If you have extra rope, do more daisy chains to keep it tidy and 'use it up'.
I'm partial to the taut-line hitch, but you could also use a rolling hitch. I like using adjustable knots because they're easier to get tight, quick to re-tighten if they come loose for any reason, and easy to loose and untie. Simply tie the taut-line hitch back onto the same line after feeding it through the loop, you can then slide the knot along the rope as you tighten the trucker knot (or butterfly pulley as I've always called it), then tie the slack off around the whole system using slip-overhand knots.
No one ever seems to mention this but if you have enough rope pass the end of it through the loop a second time. When you pull down to tension, this second pass will tuck itself under the first pass and the friction will hold it in place. Then just tie your half hitch or whatever.