biology

TMK

TMK is a biology 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 TMK rather than just read about it. In short: TMK (Russian: Тяжелый Межпланетный Корабль, romanized: Tyazhelyy Mezhplanetnyy Korabl', lit. 'Heavy Interplanetary Vessel') was the designation of a Soviet space exploration project to send a crewed flight to Mars and Venus (TMK-MAVR design) without landing. The TMK-1 spacecraft was due to be launched in 1971 and make a three-year-long flight including a Mars flyby, at which time probes would have been dropped.

TMK — main illustration — TMK — illustration

Key takeaways

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

Reference excerpt

TMK (Russian: Тяжелый Межпланетный Корабль, romanized: Tyazhelyy Mezhplanetnyy Korabl', lit. 'Heavy Interplanetary Vessel') was the designation of a Soviet space exploration project to send a crewed flight to Mars and Venus (TMK-MAVR design) without landing. The TMK-1 spacecraft was due to be launched in 1971 and make a three-year-long flight including a Mars flyby, at which time probes would have been dropped. Expanded project variations, such as the TMK-E, Mavr or KK, including a Venus flyby, electric propulsion or a crewed Mars landing were also proposed. The TMK project was planned as a response to the United States' crewed Moon landings. An earlier Martian Piloted Complex mission was proposed in 1956. The project was never completed because the required N1 rocket never flew successfully.

TMK-1

The first flight to Mars of the TMK-1 was planned to begin on June 8, 1971. The 75 metric ton TMK-1 spacecraft would take a crew of three on a Mars flyby mission. After a 10½ month flight the crew would race past Mars, dropping remote-controlled landers, and then be flung into an Earth-return trajectory. Earth return would happen on July 10, 1974, after a voyage of three years, one month, and two days. Spacecraft configuration:

A habitation or pilot compartment, with an internal volume of 25 cubic meters A work or equipment section, including the hatch for extra-vehicular activities and a solar storm shelter should solar flares increase radiation to dangerous levels. Total volume of the section would be 25 cubic meters A biological systems compartment, with the SOZh closed-cycle environmental control system, with a total volume of 75 cubic meters An aggregate section, with the Mars probe capsules, the KDU midcourse correction engine, the SOZh solar concentrator and solar panels, and radio antennas The SA crew Earth reentry capsule, about 4 m in diameter.

TMK-E

This variation was proposed in 1960, and consisted of a complete Mars landing expedition to be assembled in Earth orbit using several N1 launches. The spacecraft would be powered by nuclear electric engines and five landers would deliver a nuclear-powered Mars Train on the surface for a one-year mission. The TMK-E would be capable of a three-year flight to Mars and return, of which one year was powered flight. It would measure 175 m in length and house a crew of six. Six landing craft were included, two for the crew and four for the Mars Train vehicles.

Mavr (MArs - VeneRa)

A variation of the TMK mission planning involved a flyby of Venus on the return voyage, and was given the code name "Mavr" (MArs - VeneRa), meaning Mars - Venus.

KK - Space Complex for Delivering a Piloted Expedition to Mars

In 1966, a final version of the TMK studies was known as KK - Space Complex for Delivering a Piloted Expedition to Mars. Nuclear electric propulsion was to be used for the 630-day mission. The craft structure consisted of:

EK - Expeditionary spacecraft: command center for piloting in interplanetary space OK - Orbital Complex: living and work compartments and the life support systems SA - The Landing Module, AV - The Ascent Module and RV - The Ascent Rocket stage PS - The Planetary Station: used by the expedition on the Martian surface for life support and scientific research The launch was planned for 1980, with a crew of three cosmonauts. Mars stay duration would be 30 days. Mission data:

Total Payload Required in Low Earth Orbit-metric tons: 150 Total Propellant Required-metric tons: 24 Number of Launches Required to Assemble Payload in Low Earth Orbit: 2 Launch Vehicle: N1

See also Human mission to Mars Manned Venus flyby

References

Illustrations

Worked examples

Example 1 — a first encounter with TMK

Start with the simplest possible case. Write down what TMK claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 TMK 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 TMK 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 TMK

In research: TMK appears in biology 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 TMK 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: TMK is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cancelled Soviet space probes, Human missions to Mars, Human missions to Venus, so understanding it makes those chapters shorter.
In everyday life: Look for TMK 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 TMK in 20 minutes

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

Frequently asked questions

What is TMK in simple terms?

Why does TMK matter?

Because it connects several biology 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 TMK?

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 TMK.

TMK