science

Sukhoi Su-12

Sukhoi Su-12 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 Sukhoi Su-12 rather than just read about it. In short: The Sukhoi Su-12 (Aircraft RK) was a prototype Soviet reconnaissance and artillery spotter aircraft developed during World War II. Development In November 1943, the Sukhoi OKB designed an artillery spotter aircraft based on the German Focke-Wulf Fw 189.

Key takeaways

Sukhoi Su-12 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sukhoi Su-12 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sukhoi Su-12 from memory before moving on to harder problems.

Reference excerpt

The Sukhoi Su-12 (Aircraft RK) was a prototype Soviet reconnaissance and artillery spotter aircraft developed during World War II.

Development In November 1943, the Sukhoi OKB designed an artillery spotter aircraft based on the German Focke-Wulf Fw 189. As designed, the aircraft had a crew of three and was powered by a pair of Shvetsov M-62 engines. The aircraft was initially denied funding but was eventually approved thanks to an intervention by the Soviet Chief Marshal of Artillery N.N. Voronov. As a result of evolving specifications, the crew was increased to four and the engines were changed to more powerful Shvetsov ASh-82M with 1,640 kW (2,200 hp). The Su-12 prototype flew on 26 August 1947 with N.D. Fikson at the controls. The test flight program was completed by 30 October. Due to problems with the ASh-82M engines, the powerplant was changed to ASh-82FN making 1,380 kW (1,850 hp), but while reliable, the less-powerful engines caused the Su-12 to miss its top speed and service ceiling specifications. The Su-12 successfully completed government testing in September 1949 and was recommended for production. Due to lack of production capacity in the USSR, in October 1949 it was proposed to build the airplane in Czechoslovakia. However, the application for production was denied, citing failure to meet performance specifications. Subsequent efforts by the Sukhoi Design Bureau to secure funding and continue work on the Su-12 were denied.

Operators Soviet Union Soviet Air Force

Specifications (Su-12)

Data from Shavrov, and OKB Sukhoi General characteristics Crew: 3 Length: 11.92 m (39 ft 1 in) Wingspan: 21.57 m (70 ft 9 in) Height: 5.54 m (18 ft 2 in) Wing area: 52 m2 (560 sq ft) Airfoil: root: NACA 23014; tip: NACA 23009.25 Empty weight: 6,970 kg (15,366 lb) Gross weight: 9,610 kg (21,186 lb) Fuel capacity: 620 L (160 US gal; 140 imp gal) in two wing tanks and two engine nacelle tanks Powerplant: 2 × Shvetsov ASh-82FN 14-cylinder air-cooled radial piston engines, 1,380 kW (1,850 hp) each Propellers: 4-bladed AV-9VF21K, 3.6 m (11 ft 10 in) diameter feathering constant-speed propellers Performance

Maximum speed: 531 km/h (330 mph, 287 kn) at 5,600 m (18,400 ft) Range: 1,140 km (710 mi, 620 nmi) at 1,000 m (3,300 ft) Endurance: >4 hours at 1,000 m (3,300 ft) Service ceiling: 11,000 m (36,000 ft) Time to altitude: 5,000 m (16,000 ft) in 7 minutes 30 seconds Take-off run: 230 m (750 ft) Landing run: 320 m (1,050 ft) Armament

Guns: 4 × 20 mm Berezin B-20 autocannon (1 fixed forward-firing, 2 in the upper turret, 1 in the tail turret) Bombs: Up to 800 kg (1,765 lb) of bombs

Illustrations

Worked examples

Example 1 — a first encounter with Sukhoi Su-12

Start with the simplest possible case. Write down what Sukhoi Su-12 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 Sukhoi Su-12 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 Sukhoi Su-12 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 Sukhoi Su-12

In research: Sukhoi Su-12 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 Sukhoi Su-12 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: Sukhoi Su-12 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1940s Soviet military reconnaissance aircraft, Abandoned military aircraft projects of the Soviet Union, Aircraft first flown in 1947, so understanding it makes those chapters shorter.
In everyday life: Look for Sukhoi Su-12 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 Sukhoi Su-12 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sukhoi Su-12 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 Sukhoi Su-12 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sukhoi Su-12 in simple terms?

The Sukhoi Su-12 (Aircraft RK) was a prototype Soviet reconnaissance and artillery spotter aircraft developed during World War II. Development In November 1943, the Sukhoi OKB designed an artillery spotter aircraft based on the German Focke-Wulf Fw 189.

Why does Sukhoi Su-12 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 Sukhoi Su-12?

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 Sukhoi Su-12.