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Hobble (device)

Hobble (device) is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hobble (device) rather than just read about it. In short: A hobble (also, and perhaps earlier, hopple), or spancel, is a device which prevents or limits the locomotion of an animal, by tethering one or more legs. Although hobbles are most commonly used on horses, they are also sometimes used on other animals.

Hobble (device) — main illustration
Hobble (device) — illustration

Key takeaways

  • Hobble (device) belongs to physics; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Hobble (device) to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hobble (device) from memory before moving on to harder problems.

Reference excerpt

A hobble (also, and perhaps earlier, hopple), or spancel, is a device which prevents or limits the locomotion of an animal, by tethering one or more legs. Although hobbles are most commonly used on horses, they are also sometimes used on other animals. On dogs, they are used especially during force-fetch training to limit the movement of a dog's front paws when training it to stay still. They are made from leather, rope, or synthetic materials such as nylon or neoprene. There are various designs for breeding, casting (causing a horse or other large animal to lie down with its legs underneath it), and mounting horses.

Types

Western horse hobbles "Western"-style horse hobbles are tied around the pasterns or cannon bones of the horse's front legs. They comprise three basic types:

The vaquero or braided hobble, which is often of a quite fancy plaiting and lighter than other varieties, and is therefore only suitable for short term use. The figure eight hobble or Queensland Utility Strap, a common style of hobble that stockmen wear as a belt and can be used neck strap, lunch-time hobble, or tie for a “micky”. This hobble is made with three pieces of leather and two rings, plus a buckle fastening. The twist hobble, made of soft leather or rope, with a twist between the horse's legs. The above patterns are unsuitable for training, as they can tighten around a leg and cause injury. Western hobbles are normally used to secure a horse when no tie device, tree, or other object is available for that purpose; e.g., when, if traveling across open lands, a rider has to dismount for various reasons. Hobbles also allow a horse to graze and move short distances slowly, yet prevent the horse from running off too far. This is handy at night if the rider has to get some sleep; using a hobble ensures that, in the morning, they can find their horse not too far away. Hobble training a horse is a form of sacking out and desensitizing a horse to accept restraints on its legs. This helps a horse accept pressure on its legs in case it ever becomes entangled in barbed wire or fencing. A hobble-trained horse is less likely to pull, struggle, and cut its legs in a panic, since it has been taught to give to pressure in its legs.

Other hobbles Breeding or service hobbles usually fasten around a mare's hocks, pass between her front legs to a neck strap. They are used to protect a stallion from kicks. Casting hobbles are the same as the above, but with another rope or strap attached to the other hind foot. When these straps or ropes are pulled up together, the horse will fall. Cattle hobbles are a strong strap with a metal keeper in the middle and a buckle at the end. They are used on the hind legs for a short period when capturing feral cattle. Drovers’ or grazing hobbles have a buckle on a wide double redhide or chrome leather strap and a swivel and 5 ring chain connecting them. They are placed around the pasterns. Hind leg pull up strap passes from a neck strap and around a hind pastern to draw up a hind foot for shoeing or treatment. Hopples (sometimes called hobbles) are a piece of equipment used by Standardbred pacers to help the horse maintain its pacing gait. Humble or one leg hobble is a strap placed around the front pastern, and then the leg is lifted and the strap is wrapped around the upper leg and then buckled, leaving the horse with three legs to stand on. Mounting hobbles are knee hobbles that are made with a quick release, on a lead that passes to the rider. They are used to mount fractious horses and when mounted the rider can retrieve them.

Picket hobble is a single hobble that is placed on a front pastern and then attached to a tether chain. Sideline hobbles may be made in the same manner as above, but with a longer chain to hobble a front and back leg. Rope may also replace the chain. They, too, are placed around the pasterns. This pattern may be useful on a persistent jumper or a horse that has mastered the art of travelling in front leg hobbles. The Somali side-lining method is a traditional technique for securing horses and mules using stiff leather thongs with loops and wooden buttons, which explorers found to be safer than conventional lariats or tethers. Three or four leg hobbles are made in a similar pattern to the above and hobble three or four legs. Used for securing legs for operations, etc.

History

Hobbles date at least as far back as Ancient Egypt. Two Egyptian hieroglyphs are believed to depict hobbles. A hobble is illustrated on a silver vase excavated from a 4th century B.C. tomb at Chertomlyk in modern day Ukraine. The Persians were also known for their custom of hobbling. In Anabasis, Xenophon claims "a Persian army is good for nothing at night. Their horses are haltered, and, as a rule, hobbled as well to prevent their escaping as they might if loose."

See also Hobble skirt Legcuffs

References

R. J. Sagely. "The How-To's of the Hobble". Archived from the original on October 27, 2005. Retrieved October 25, 2005. — A detailed discussion of the various types of Western hobbles Alan Henderson Gardiner (1957). Egyptian Grammar; Being an Introduction to the Study of Hieroglyphs. Griffith Institute.

Illustrations

Hobble (device): A hobbled donkey in Sardinia
A hobbled donkey in Sardinia
Hobble (device): Hind leg pull up strap
Hind leg pull up strap
Hobble (device): Drovers' and cattle hobbles
Drovers' and cattle hobbles
Hobble (device): Pacing hopples
Pacing hopples

Worked examples

Example 1 — a first encounter with Hobble (device)

Start with the simplest possible case. Write down what Hobble (device) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hobble (device) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hobble (device) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hobble (device)

In research
Hobble (device) appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Hobble (device) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Hobble (device) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animal equipment, Horse tack, Physical restraint, so understanding it makes those chapters shorter.
In everyday life
Look for Hobble (device) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Hobble (device) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hobble (device) means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hobble (device) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hobble (device) in simple terms?

A hobble (also, and perhaps earlier, hopple), or spancel, is a device which prevents or limits the locomotion of an animal, by tethering one or more legs. Although hobbles are most commonly used on horses, they are also sometimes used on other animals.

Why does Hobble (device) matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hobble (device)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hobble (device).

Tags

  • Animal equipment
  • Horse tack
  • Physical restraint

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