science

V-4 (rocket launch)

V-4 (rocket launch) 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 V-4 (rocket launch) rather than just read about it. In short: V-4 was the first mostly-successful launch of the Aggregat 4 rocket, later known as Vergeltungswaffe 2 (V-2). The launch occurred on the afternoon of 3 October 1942 and the rocket set a speed record of Mach 4, reached an apogee of 84.5 km (52.5 mi), thereby becoming the first artificial object to reach both the mesosphere and the thermosphere, surpassing the apogee of 42.3 km (26.3 mi) set by the Paris gun in 1918.

Key takeaways

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

Reference excerpt

V-4 was the first mostly-successful launch of the Aggregat 4 rocket, later known as Vergeltungswaffe 2 (V-2). The launch occurred on the afternoon of 3 October 1942 and the rocket set a speed record of Mach 4, reached an apogee of 84.5 km (52.5 mi), thereby becoming the first artificial object to reach both the mesosphere and the thermosphere, surpassing the apogee of 42.3 km (26.3 mi) set by the Paris gun in 1918.

At the time, the V-4 launch was considered the first time a man-made object reached outer space (Geburtstag der Raumfahrt, "Birthday of spaceflight"). That evening, Walter Dornberger declared in a speech at Peenemunde, This third day of October, 1942, is the first of a new era in transportation, that of space travel ... In 1960, the World Air Sports Federation (FAI) defined a boundary for space at 100 km (62 mi) (approximately the highest possible altitude where an aircraft can fly at less than orbital velocity in order not to stall), while the United States' Air Force, NASA and Federal Aviation Administration consider 50 mi (80 km) the space boundary, the lower mesopause. The V-4 launch satisfied the present-day American definition, while it did not cross the FAI's 100 km line. The 100 km boundary was established much later however, and the V-4 trajectory did reach the Kármán altitude range (c. 83–100 km or 52–62 mi), of which the 100-kilometer boundary is simply a round-number approximation.

See also List of V-2 test launches Spaceflight before 1951 MW_18014 a V-2 launched 20 June 1944 reaching 176km, crossing into outer space

References

Worked examples

Example 1 — a first encounter with V-4 (rocket launch)

Start with the simplest possible case. Write down what V-4 (rocket launch) 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 V-4 (rocket launch) 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 V-4 (rocket launch) 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 V-4 (rocket launch)

In research: V-4 (rocket launch) 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 V-4 (rocket launch) 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: V-4 (rocket launch) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1940s in spaceflight, 1942 in Germany, Short-range ballistic missiles, so understanding it makes those chapters shorter.
In everyday life: Look for V-4 (rocket launch) 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 V-4 (rocket launch) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what V-4 (rocket launch) 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 V-4 (rocket launch) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is V-4 (rocket launch) in simple terms?

Why does V-4 (rocket launch) 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 V-4 (rocket launch)?

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 V-4 (rocket launch).