Originally Posted by northswedish
I have never seen something like this employed. It looks very harsh and ineffective, however. I would not use such a thing.
The Jim Warner is harsh, due partial to the joint anndankev was talking about, and with shank to purchase ratios, it's probably a fivefold pressure magnifier. However, it is effective and gives clear signals. You see it a lot in barrel racing. The rope noseband is also abrasive and can cause sores even with relatively soft hands. Best to wrap it in Sealtex rubber.
This is my favorite type of mechanical hackamore; the leather-nose Little S (referring to the shape of the shanks). It's fairly mild and can be used for direct reining with a sidepull-like action.
The Stop and Turn is a piece of crap. Very harsh. Doesn't have a true curb, just a nasty straight bar to slam against the jawbone while the rope noseband cuts into the face.
here are some pictures that do not even show the english type or the longer shanks with different turns and angles I remember from ages ago someont told me no matter the curves the leveraje in the bit is the length I am ok with that explanation just interested in theturns providing specific delay action or smothness or is the bends merly decorative on longer shanks...
The length of shank itself is not what gives leverage power. It's the ratio of the shank to the purchase (in a bit, the parts below versus above the mouthpiece). So if you have a six-inch shank and a two-inch purchase, that's a 6:2 or 3:1 ratio, meaning a 3X magnification. To be honest, I am not entirely certain how shank curvature affects this balance. Curved shanks definitely remove some of the severity when swept back so that the rein attachment is behind the mouthpiece. This also changes the speed of action. But vertical distance, I believe, is still the determining factor in leverage increase.