science

Quickdraw

Quickdraw is a science 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 Quickdraw rather than just read about it. In short: A quickdraw (also known as an extender) is a piece of climbing equipment used by rock and ice climbers to allow the climbing rope to run freely through protection such as bolt anchors or other traditional gear while leading. A quickdraw consists of two carabiners connected by a semi-rigid material (sometimes called the "dogbone").

Key takeaways

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

Reference excerpt

A quickdraw (also known as an extender) is a piece of climbing equipment used by rock and ice climbers to allow the climbing rope to run freely through protection such as bolt anchors or other traditional gear while leading. A quickdraw consists of two carabiners connected by a semi-rigid material (sometimes called the "dogbone"). One carabiner has a straight gate and connects to an anchoring device. The other carabiner is for the climbing rope, and uses a bent gate. Quickdraws are manufactured with either a solid carabiner gate or a wire carabiner gate for their lighter weight.

Use A quickdraw is a specific type of runner. Runners are used by rock and ice climbers to extend the distance between an anchoring device and the rope. A quickdraw is differentiated from a simple open loop of webbing with 2 carabiners on it by the following attributes:

The material that connects the 2 carabiners is semi-rigid. It is not as flexible as an open loop of webbing. This rigidity facilitates quicker clipping to an anchoring device. The gate (on the carabiner that clips to a rope) is held in a specific orientation that facilitates quicker clipping to a rope. These two attributes differentiate a quickdraw from other types of runners. These two attributes are what makes this special type of runner "quick" to "draw". If either of these two elements is missing the runner is not a "quickdraw". The methods by which a quickdraw maintains gate orientation vary. The most popular method involves the use of an elastic polymer band around the outside of the point of connection between the carabiner and the semi-rigid material. The elastic band should only be installed on the rope-end, and not on the anchor end. The elastic band is not a load-bearing element, and the carabiner must pass through the dogbone to hold body weight. Incorrectly assembled quickdraws led to the death of Tito Traversa in 2013. While historically the orientation of the gates varied, it is now generally recommended that both gates face the same direction, and that the quickdraw is clipped with both gates facing away from the climber's path. This lessens the chances of the carabiner getting "nose-hooked" and breaking, or of either carabiner unclipping, during a fall or due to rope drag.

Permadraw A permadraw is a quickdraw that is made from steel cable that has steel carabiners and remains permanently attached to the bolts. Developed in places such as Rifle Mountain Park in Colorado as a safer alternative; steel is much harder-wearing than the aluminum used in normal quickdraws. In addition, unlike quickdraws, climbers don't need to retrieve the permadraws at the end of a climb. In indoor climbing gyms that offer wall space or lanes for lead climbing, permadraws are typically already placed on the wall with maillons.

Alpine draw Alpine quick draws feature long slings wrapped or folded multiple times to save space on a climbers harness in place of a dogbone. Alpine draws are often used to extend pieces of protection and reduce rope drag but may also be attached to the harness simply as a convenient way to store slings for other purposes, such as building an anchor or use in natural protection. The softer sling of an alpine draw may be considered superior to the stiffer dogbone of most quick draws as it causes less perturbation of traditional protection and may reduce the chance of the rope unclipping itself from the carabiner.

References

External links How to select Quickdraws for Climbing Media related to Quickdraws at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Quickdraw

Start with the simplest possible case. Write down what Quickdraw claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Quickdraw 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 Quickdraw 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 Quickdraw

In research: Quickdraw appears in science 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 Quickdraw 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: Quickdraw is common in secondary-school and first-year university syllabi. It links to neighbouring topics Climbing equipment, Sport climbing, so understanding it makes those chapters shorter.
In everyday life: Look for Quickdraw 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 Quickdraw in 20 minutes

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

Frequently asked questions

What is Quickdraw in simple terms?

Why does Quickdraw matter?

Because it connects several science 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 Quickdraw?

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 Quickdraw.