Always appreciate
@Brocky and his input, and drawings. Regarding terminologies, technically, the term "knot" has multiple meanings and encompasses all "complications of cordage". Thus "Ashley's Book of Knots" is a appropriately named, and includes all types of knots, including Hitches, Bends, etc. A "hitch" is a type of knot that secures a piece of cordage to a host, which in the case of a "friction hitch", is another rope.
I have been studying friction hitches for a long time and created a few dozen of them. I have only published the JRB Ascender Hitch though, only because its the only one that has features above and beyond anything else. It was submitted and recognized as unique by the International Guild of Knot Tyers. I am not aware of a friction hitch in its league. It's a lot to tie, but I can:
- Break it under the load of my full body weight with one hand
- Execute a controlled rappel on it if I needed to
- Set it to automatically tend upward by pulling on the rope end, with no other device required
- Tie it so that it can't jam ('just published the Non-Jamming JRB Ascender Variant)
- Can tie it into SRT, MRS or JRB systems. An Arborist Hitch Climber Pulley setup was one of many tests I ran and it performed amazingly.