science

Soyuz 34

Soyuz 34 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 Soyuz 34 rather than just read about it. In short: Soyuz 34 (Russian: Союз 34, Union 34) was a 1979 Soviet uncrewed space flight to the Salyut 6 space station. It was sent to supply the resident crew a reliable return vehicle after the previous flight, Soyuz 33, suffered an engine failure.

Key takeaways

Soyuz 34 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Soyuz 34 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Soyuz 34 from memory before moving on to harder problems.

Reference excerpt

Soyuz 34 (Russian: Союз 34, Union 34) was a 1979 Soviet uncrewed space flight to the Salyut 6 space station. It was sent to supply the resident crew a reliable return vehicle after the previous flight, Soyuz 33, suffered an engine failure. Mission control decided to re-design the engine used on Soyuz craft as a result of the Soyuz 33 failure, and to return the Soyuz 32 craft which transported Vladimir Lyakhov and Valery Ryumin to the space station to Earth uncrewed as it had the same suspect engine as Soyuz 33. Soyuz 34 successfully returned the crew to earth 73 days after launching.

Crew

Mission parameters Mass: 6,800 kg (15,000 lb) Perigee: 199 km (124 mi) Apogee: 271.5 km (168.7 mi) Inclination: 51.62° Period: 88.91 minutes

Mission highlights Soyuz 34 had been intended to have been launched around 6 June 1979 with a two-man Hungarian/Soviet crew. That crew would have presumably returned in Soyuz 33 which had been planned to be docked at the Salyut 6 space station. Suspicions this was originally to be a Hungarian/Soviet flight were confirmed in 1980 when press releases for an upcoming joint mission were still dated June 1979. However, the engine failure during Soyuz 33's flight in April necessitated a shuffling of planned missions. Because the engine used in that flight was the same model already docked at the space station on Soyuz 32 and the resident crew of Vladimir Lyakhov and Valery Ryumin needed a reliable craft to return to Earth in, it was decided that the engine needed to be modified and a fresh return vehicle sent to the station - vacant. Soyuz 34 was launched uncrewed on 6 June, and docked at the aft port of the space station on 9 June. The flight itself was a test of the new engine and its success meant the crew had a reliable return craft. Since the craft was uncrewed, some biological samples for experiments were included on the flight. Soyuz 32 was loaded with 130 kg of replaced instruments, processed materials, exposed film and other items with a total weight equal to that of the two cosmonauts. On 13 June, it undocked and returned to Earth uncrewed 295 km northwest of Dzhezkazgan. The craft was found to be in good condition. The next day, the crew redocked Soyuz 34 at the forward port to clear the aft port for Progress 7, a supply tanker. On 19 August, the resident crew returned to earth in Soyuz 34, establishing a new space-endurance record of 175 days, surpassing the 139-day mission by the Soyuz 29 crew in 1978.

Legacy Years later, a similar scenario of crew return was required in 2022. As Soyuz MS-22 was unable to perform crew return due a coolant leak in external radiator, it returned uncrewed with cargo instead of crew like Soyuz 32, and Soyuz MS-23 was launched unmanned with cargo like Soyuz 34 as a replacement to return the crew.

Illustrations

Worked examples

Example 1 — a first encounter with Soyuz 34

Start with the simplest possible case. Write down what Soyuz 34 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 Soyuz 34 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 Soyuz 34 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 Soyuz 34

In research: Soyuz 34 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 Soyuz 34 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: Soyuz 34 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1979 in the Soviet Union, Crewed Soyuz missions, Human spaceflights to Salyut space stations, so understanding it makes those chapters shorter.
In everyday life: Look for Soyuz 34 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 Soyuz 34 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Soyuz 34 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 Soyuz 34 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Soyuz 34 in simple terms?

Why does Soyuz 34 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 Soyuz 34?

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 Soyuz 34.