science

S-71 Monokhrom

S-71 Monokhrom 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 S-71 Monokhrom rather than just read about it. In short: S-71 Monokhrom (Russian: С-71 "Монохром") is a Russian air-launched unmanned aerial vehicle (UAV) with the characteristics of a cruise missile. History The Sukhoi Design Bureau began work on a new type of UAV in 2019.

Key takeaways

S-71 Monokhrom belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect S-71 Monokhrom to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of S-71 Monokhrom from memory before moving on to harder problems.

Reference excerpt

S-71 Monokhrom (Russian: С-71 "Монохром") is a Russian air-launched unmanned aerial vehicle (UAV) with the characteristics of a cruise missile.

History The Sukhoi Design Bureau began work on a new type of UAV in 2019. To facilitate operation and deployment, it was decided to base its design on the concept of a cruise missile dropped from an Su-57 carrier aircraft, where it is carried on AKU-58A or BD3-USK-A booms. Work intensified in 2022 and reached the flight testing stage in 2023. On August 1, 2023, the United Aircraft Corporation filed a patent application for an air-launched UAV with a warhead. It describes an unmanned aerial vehicle capable of operating as a loitering munition or cruise missile. In March 2024, the company received patent number RU2816326C1, and flight tests were completed the same year. Based on the developed design and the experience gained during its development, an unmanned aerial vehicle designated the S-71M Monochrom was put into production. It is capable of autonomous operation within a designated area, searching for and identifying targets. The S-71 is capable of independently making decisions about and carrying out an attack. Media reports indicate that it has been adapted for launch from the S-70 Okhotnik heavy drone and that a simplified version has been developed, designated S-71K Dyvan (Russian: С-71К «Ковёр»), with low detectability (RCS = 0.007–0.01 m²), capable of covering a distance of 200–350 km at low altitudes of 20–75 m above the ground and 5–15 m above water. The main application of the S-71K is to attack targets with fixed coordinates using a cluster warhead. The drone is manufactured at the Tactical Missile Armament Plant (Russian: «Тактическое ракетное вооружение»).

Combat Use The first combat use took place during Russian invasion of Ukraine. Russian media reported that in January 2026, near the village of Khlopyaniki, S-71 drones destroyed a HIMARS missile launcher that was participating in an attack on targets in the Bryansk Oblast.

Design The drone was built in a standard aircraft configuration, designed to reduce its radar signature. The fuselage is hexagonal in cross-section and terminated with a V-tail. It is powered by a TRDD-50 (Russian: ТРДД-50) turbojet engine or its modification, enabling sustained subsonic flight at low altitudes. The engine's exhaust nozzle is designed to reduce its thermal signature. The drone is armed with a 100-150 kg high-explosive fragmentation warhead. It is equipped with an inertial guidance system and a GLONASS satellite navigation module. The wings are foldable and deploy after airdrop. The S-71M's size allows four S-71Ks to be carried in the Su-57's internal bay; the S-71K must be carried on under-wing weapons mounts. The Su-57 can carry four S-71Ks. Remains of a destroyed S-71M, recovered by Ukrainian forces in mid 2026, showed that it was controlled by a Nvidia Jetson Orin NX, produced in March 2025, the most powerful board found on a Russian weapon used in Ukraine so far. Comparable with the performance of a GeForce-series RTX 3000 graphic card.

References

Worked examples

Example 1 — a first encounter with S-71 Monokhrom

Start with the simplest possible case. Write down what S-71 Monokhrom 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 S-71 Monokhrom 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 S-71 Monokhrom 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 S-71 Monokhrom

In research: S-71 Monokhrom 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 S-71 Monokhrom 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: S-71 Monokhrom is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aircraft first flown in 2024, Flying wings, Single-engined jet aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for S-71 Monokhrom 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 S-71 Monokhrom in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what S-71 Monokhrom 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 S-71 Monokhrom out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is S-71 Monokhrom in simple terms?

S-71 Monokhrom (Russian: С-71 "Монохром") is a Russian air-launched unmanned aerial vehicle (UAV) with the characteristics of a cruise missile. History The Sukhoi Design Bureau began work on a new type of UAV in 2019.

Why does S-71 Monokhrom 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 S-71 Monokhrom?

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 S-71 Monokhrom.