science

Renfe Class 353

Renfe Class 353 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 Renfe Class 353 rather than just read about it. In short: The Renfe Class 353, formerly known as the T-3000 are a class of diesel-hydraulic locomotives built by Krauss-Maffei for express trains in Spain. Background and design The class could be described as the bigger and better version of the Renfe Class 352, being similar in design, and from the same builder, but with more power and also two cabins to simplify operation.

Key takeaways

Renfe Class 353 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Renfe Class 353 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Renfe Class 353 from memory before moving on to harder problems.

Reference excerpt

The Renfe Class 353, formerly known as the T-3000 are a class of diesel-hydraulic locomotives built by Krauss-Maffei for express trains in Spain.

Background and design The class could be described as the bigger and better version of the Renfe Class 352, being similar in design, and from the same builder, but with more power and also two cabins to simplify operation. They were delivered between 1968 and 1969, built to a similar two-engined hydraulic transmission design as the Class 352 but with Maybach 12-cylinder engine developing more power, 1,500 hp (1,100 kW) (at 1600 rpm) each, giving a tractive effort of 268 kN (60,000 lbf). Built with two interior walkways via the cabins, the locomotives were a little heavier than their predecessors at 88 t (87 long tons; 97 short tons). The locomotives were fitted with coupling screws and Scharfenberg couplers. Auxiliary generators provide electrical power for the coaches. Two sets of standard gauge bogies were also supplied, for cross border work (bogie exchange). The locomotives were painted in red-silver.

Operations A total of five diesel were acquired to pull the Talgo III coaches at a record speed of over 220 km/h (140 mph). Their commission was related to the inauguration of the Talgo III RD (dual gauge) coached train from Madrid to Paris via Burgos, Vitoria, Hendaya and Bordeaux. The trains also worked other international trains such as Barcelona to Geneva via Narbonne, Montpellier and Culoz, and the Paris to Barcelona; taking charge of the train after it passed the change of gauge to broad Iberian gauge at the stations of Irún and Portbou. In May 1972, one of them reached a speed of 222 km/h (138 mph) between Guadalajara and Azuqueca de Henares. Between Alcázar de San Juan and Rio Záncara, on 4 May 1978, 353-001 reached 230 kilometres per hour (140 mph), for some time the class held the world speed record for diesel traction. The mass electrifications in the eighties reduced the radius of action of both the Class 352 and Class 353, operating primarily in the axes Badajoz / Lisbon, Granada / Almería, Murcia / Cartagena and direct corridor from Madrid to Burgos. The standard gauge bogies found a use unexpected at the time of the locomotives inception – in 1991 was used to tow a Talgo Pendular train on the high speed Madrid to Seville AVE line. The class was retired on 25 September 2003. The 353-005-2 is preserved in working condition at the museum of Vilanova.

Fleet details

See also Renfe Class 352, Renfe Class 354 - Predecessor and successor classes, built to a very similar design by Krauss-Maffei.

References

"Maybach engines in Spain". Archived from the original on 21 June 2007. Salmeron i Bosch, Carles (1985). Las Locomotoras de España. Barcelona: Editorial Terminus.

External links

Photographs of the Class 353 fototrenes.tranvia.org

Illustrations

Worked examples

Example 1 — a first encounter with Renfe Class 353

Start with the simplest possible case. Write down what Renfe Class 353 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 Renfe Class 353 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 Renfe Class 353 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 Renfe Class 353

In research: Renfe Class 353 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 Renfe Class 353 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: Renfe Class 353 is common in secondary-school and first-year university syllabi. It links to neighbouring topics B-B locomotives, Diesel locomotives of Spain, Diesel–hydraulic locomotives, so understanding it makes those chapters shorter.
In everyday life: Look for Renfe Class 353 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 Renfe Class 353 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Renfe Class 353 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 Renfe Class 353 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Renfe Class 353 in simple terms?

The Renfe Class 353, formerly known as the T-3000 are a class of diesel-hydraulic locomotives built by Krauss-Maffei for express trains in Spain. Background and design The class could be described as the bigger and better version of the Renfe Class 352, being similar in design, and from the same bu…

Why does Renfe Class 353 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 Renfe Class 353?

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 Renfe Class 353.