I'm only seeing one twist in the picture from the OP Elf...am I being dim?
But one twist or two I can't imagine that there's much slip action to be had there. And no matter how soft and elastic that rubber is (and from the way it is sitting it doesn't actually look that soft) I can't imagine that it is pleasant having a resistance band strapped around your airway
Thanks Elf.It's made of rubber and usually only has one twist in the front. That one was obviously too big so they double twisted it. They are commonly used in racing. They are very flexible and forgiving compared to how tight a lot of people do up normal grackles and flashes.
Eta - single twist
Thanks Elf.
On my phone so a bit blind - in your photo, is it attached to the cheekpiece or does it have its own headpiece? I've had a google of NH horses, but mostly seeing the leather grackle: is there a behavioural/medical reason that a horse might have this type of grackle rather than leather, or this just trainer preference? Does the twist ever rub their nose? Does it have a name?
(Apologises for the mini interrogation! I really appreciate you sharing your knowledge.)
It looks like it must have a really uncomfortable pressure point where the knots cross over.
The rubber is a full circular piece, there are no buckles or anything so you put your bridle on with part of the loop under the cheek at the back, take the front piece and cross it over itself just once into a figure of 8, stretch the second rubber loop and put it down under the mouth to behind the chin under the bit. This is the normal way of doing as per my picture.
The one in the OP's picture has had the rubber loop crossed over, twisted round on itself and then looped down under the mouth. Which will make it slightly tighter.
I would far rather have these than the horrifically tight grackles and flashes you see so often in dressage and eventing. These have a lot of give in them. Leather does not and can be done up as tight as the human hand can make it.
Ah right I see, so correct is no twists. That is at least slightly better.
Not sure I buy the mechanical explanation tbh. I have more than a passing knowledge in the properties and mechanical behaviour of rubber and personally wouldn't dream of putting a rubber strap around my horse's nose. The fact that people abuse other types of noseband is not really particularly relevant to my mind. No leather doesn't give like rubber but it also doesn't increase in return force the more it's stretched in the same way as rubber does
You beat me to it!It looks like it must have a really uncomfortable pressure point where the knots cross over.
Elasticated fabric is so different to a rubber band as per the OP Mechanical properties-wise though that this is like comparing apples to a lump of cheeseIf I wanted an elastic grackle (which def has its place) there are nicer designs out there eg Kate negus
As an aside, I hadn't heard of kate negus before but oh my gosh some of that tack is absolutely stunning