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McKeen railmotor

McKeen railmotor 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 McKeen railmotor rather than just read about it. In short: The McKeen Railmotor was a 6-cylinder self-propelled railcar or railmotor. When McKeen Company of Omaha, Nebraska, U.S.A., first unveiled the car in 1905, the McKeen was among the first engines with a distillate-fueled motor.

McKeen railmotor — main illustration
McKeen railmotor — illustration

Key takeaways

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

Reference excerpt

The McKeen Railmotor was a 6-cylinder self-propelled railcar or railmotor. When McKeen Company of Omaha, Nebraska, U.S.A., first unveiled the car in 1905, the McKeen was among the first engines with a distillate-fueled motor. Revisions to the McKeen car led to the modern self-propelled gasoline rail-motor vehicle, and the "contours of the porthole windows, the front-mounted gasoline engines, and other features anticipated the streamline concept."

Design William R. McKeen was the superintendent of motive power and machinery at Union Pacific Railroad in 1904 when Edward H. Harriman, the head of UP, began encouraging him to develop the machine. The result of his experiments that year was a "knife-nosed" or "windsplitter" unit that slightly resembled a submarine on wheels, having a distinctive pointed nose, a rounded rear end, center-entry doors and porthole windows. Two lengths were offered, 55 and 70 feet (17 and 21 m), and both could be configured with either a large mail and express area ahead of the center doors, a smaller mail and express area, or fully fitted with seats, which provided a maximum passenger capacity of 64 or 105 respectively. Cheaper and more powerful than battery-powered vehicles, the McKeen was more flexible than steam locomotives and could operate at competitive speeds.

In service

Canada Two McKeen cars were operated by the Alberta and Great Waterways Railway between Edmonton and Lac La Biche.

United States

The McKeen was popular from 1915 through the 1930s throughout the United States, and the cars were featured on the Union Pacific and the Southern Pacific.

Victoria, Australia

Two McKeen railmotors were purchased by the Victorian Railways, and delivered in 1911. They were used to run the Ballarat to Maryborough and Hamilton to Warrnambool services, and briefly, between March and April 1913, the Maryborough to St Arnaud service. The railmotors proved to be very unreliable, and only lasted for about three years as self-propelled vehicles. They were de-engined in 1919, and converted to passenger cars numbered as 1 & 2 ABCL, for use on the Altona line. They were scrapped in August 1926.

Queensland, Australia In June 1911, Queensland Railways ordered five railcars from the McKeen Motor Co. at a cost of £4500 per unit. They were delivered in May 1913 and went into service with the running numbers one to five. The original seating capacity was 75, but that was later reduced to 69: 55 in the main section and 14 in the "smoker". The mechanical transmission proved to be unreliable and they were expensive to run, costing almost twice as much per mile as a steam-hauled passenger train. By 1920, Car No 1 was out of commission. Cars No 2 and 5 were modified as Tourist or Day Inspection Cars, which included luxury appointments and seating for 32 passengers. All five units were written-off between 1929 and 1931, and were broken up soon after at the Ipswich workshops.

Withdrawal

The Nevada State Railroad Museum completed the restoration of McKeen car, #22 of the Virginia and Truckee Railroad, a 70-foot (21.34 m) car by 9 May 2010. The original powerplant did not survive, but it was replaced with a modern engine and drive system to allow the car to transport visitors to the museum around its short track.

References

External links McKeen Rail Motor Cars Operating Manual from Victorian Railways Historic photo

See also Lakeside and Marblehead Railroad Railroads in Omaha Victorian Railways Weitzer railmotor, Europe's first railmotor produced in considerable numbers, at the same time as the McKeen Railmotor.

Illustrations

McKeen railmotor illustration
McKeen railmotor: Queensland Railways McKeen car, c. 1913
Queensland Railways McKeen car, c. 1913
McKeen railmotor: A McKeen car belonging to the Los Angeles and San Diego Beach Railway, the "La Jolla Line".
A McKeen car belonging to the Los Angeles and San Diego Beach Railway, the "La Jolla Line".

Worked examples

Example 1 — a first encounter with McKeen railmotor

Start with the simplest possible case. Write down what McKeen railmotor 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 McKeen railmotor 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 McKeen railmotor 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 McKeen railmotor

In research
McKeen railmotor 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 McKeen railmotor 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
McKeen railmotor is common in secondary-school and first-year university syllabi. It links to neighbouring topics Rail transportation in Nebraska, Railcars of the United States, Rolling stock innovations, so understanding it makes those chapters shorter.
In everyday life
Look for McKeen railmotor 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 McKeen railmotor in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what McKeen railmotor means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain McKeen railmotor out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is McKeen railmotor in simple terms?

The McKeen Railmotor was a 6-cylinder self-propelled railcar or railmotor. When McKeen Company of Omaha, Nebraska, U.S.A., first unveiled the car in 1905, the McKeen was among the first engines with a distillate-fueled motor.

Why does McKeen railmotor 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 McKeen railmotor?

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 McKeen railmotor.

Tags

  • Rail transportation in Nebraska
  • Railcars of the United States
  • Rolling stock innovations
  • Victorian Railways railmotors

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