science

Reduced Gravity Walking Simulator

Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator rather than just read about it. In short: The Reduced Gravity Walking Simulator, or Lunar Landing Walking Simulator, was a facility developed by NASA in the early 1960s to study human locomotion under simulated lunar gravity conditions. Located at NASA's Langley Research Center in Virginia, it was designed to prepare astronauts for the Moon landing during the Apollo program.

Key takeaways

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

Reference excerpt

The Reduced Gravity Walking Simulator, or Lunar Landing Walking Simulator, was a facility developed by NASA in the early 1960s to study human locomotion under simulated lunar gravity conditions. Located at NASA's Langley Research Center in Virginia, it was designed to prepare astronauts for the Moon landing during the Apollo program.

Design and operation A reduced gravity simulator was needed to prepare astronauts for the Moon landing. It was proposed by the NASA engineer William Hewitt Phillips. The simulator was a part of the Lunar Landing Research Facility (LLRF) and was completed in 1965. In 1972, the LLRF was redesigned into the Impact Dynamics Research Facility. The simulator was made of "canvas slings, steel cables, a small trolley, and a wooden walking surface". The simulator consisted of an inclined walkway tilted at a 9.5° angle from vertical. Test subjects were suspended on their side via cables attached to different parts of their body, "a puppet-type suspension system at the end of a long pendulum", and were inclined on their side at the same 9.5° angle. This arrangement allowed them to walk along the inclined surface while experiencing only one-sixth (17%) of Earth's gravity — equivalent to the Moon's gravitational pull. The remaining weight was supported by the suspension system. The suspension system used multiple cables connected to an overhead monorail trolley that moved parallel to the walkway. This setup permitted subjects to walk, run, jump and perform other locomotive activities along the length of the walkway. However, lateral and rotational movements were restricted. According to Francis B. Smith, during the training, the suspended astronaut feels "approximately 1/6 of the earth's normal gravity field ... a 180 pound astronaut "standing" on the platform would exert a force of only 30 pounds — the same as if he were standing upright on the lunar surface". Scientists used the simulator to analyze the physiological effects of reduced gravity on various forms of locomotion: walking, jumping, and running; fatigue limit, energy expenditure, and speed of locomotion were also studied and measured. Subjects wore pressurized spacesuits during some tests to more closely replicate lunar surface conditions. All three astronauts of the Apollo 1 trained there; in total, 24 astronauts used the simulator to train for the lunar missions. The simulator became popular among journalists. In 1968, Walter Cronkite of CBS tried it himself for a "rather comical televised walk on the moon".

Gallery

See also Lunar Orbit and Landing Approach

References

Further reading Smith, F. B. (January 1966). "Simulators for manned space research".

External links Media related to Reduced Gravity Walking Simulator at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Reduced Gravity Walking Simulator

Start with the simplest possible case. Write down what Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator

In research: Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator 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: Reduced Gravity Walking Simulator is common in secondary-school and first-year university syllabi. It links to neighbouring topics Apollo program facilities, Human spaceflight, Langley Research Center, so understanding it makes those chapters shorter.
In everyday life: Look for Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Reduced Gravity Walking Simulator in simple terms?

Why does Reduced Gravity Walking Simulator 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 Reduced Gravity Walking Simulator?

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 Reduced Gravity Walking Simulator.