science

Long March 4C

Long March 4C 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 Long March 4C rather than just read about it. In short: The Long March 4C, also known as the Chang Zheng 4C, CZ-4C and LM-4C, previously designated Long March 4B-II, is a Chinese orbital launch vehicle. It is launched from the Jiuquan, Taiyuan, and Xichang Satellite Launch Centers, and consists of 3 stages.

Key takeaways

Long March 4C belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Long March 4C to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Long March 4C from memory before moving on to harder problems.

Reference excerpt

The Long March 4C, also known as the Chang Zheng 4C, CZ-4C and LM-4C, previously designated Long March 4B-II, is a Chinese orbital launch vehicle. It is launched from the Jiuquan, Taiyuan, and Xichang Satellite Launch Centers, and consists of 3 stages. All stages use storable (rather than cryogenic) propellants. The Long March 4C is derived from the 3 stage Long March 4B, but features a restartable third stage, and a larger payload fairing.

Launch summary Long March 4C vehicles have been used to launch the Yaogan-1, Yaogan-3 synthetic-aperture radar (SAR) satellites and the Fengyun-3A polar orbiting meteorological satellite. On 15 December 2009, a Long March 4C was used to launch Yaogan-8. Because it was still designated as Long March 4B-II at the time of its maiden flight, the first launch is often mistaken for a Long March 4B. On 1 September 2016, the Long March 4C failed for reasons not yet known. A Long March 4C rocket blasted off from the Taiyuan Satellite Launch Center in Shanxi but failed to insert its payload, the Gaofen 10 satellite, into its designated orbit.

Launch statistics

List of launches

See also Long March 4B Long March (rocket family) Medium-lift launch vehicle

References

External links CZ-4C Long March Space Launch Vehicle GlobalSecurity.org

Illustrations

Worked examples

Example 1 — a first encounter with Long March 4C

Start with the simplest possible case. Write down what Long March 4C 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 Long March 4C 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 Long March 4C 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 Long March 4C

In research: Long March 4C 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 Long March 4C 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: Long March 4C is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2006 in China, 2006 in spaceflight, Long March (rocket family), so understanding it makes those chapters shorter.
In everyday life: Look for Long March 4C 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 Long March 4C in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Long March 4C 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 Long March 4C out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Long March 4C in simple terms?

Why does Long March 4C 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 Long March 4C?

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 Long March 4C.