science

Kimura HK-1

Kimura HK-1 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 Kimura HK-1 rather than just read about it. In short: The Kimura HK-1 was a glider built in Japan in 1939 to investigate the possibilities of tailless aircraft. It was a single-seat design with an open cockpit, swept wings, and a single tail fin.

Key takeaways

Kimura HK-1 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kimura HK-1 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kimura HK-1 from memory before moving on to harder problems.

Reference excerpt

The Kimura HK-1 was a glider built in Japan in 1939 to investigate the possibilities of tailless aircraft. It was a single-seat design with an open cockpit, swept wings, and a single tail fin. The HK-1 made a total of 169 test flights between 15 December 1939 and 7 March 1940, towed aloft behind a car. By this time, the glider's success had attracted the attention of the Army, which arranged to purchase the aircraft. It was taken to the Tachikawa factory for testing, but crashed after only 13 flights, on 16 April 1940. The design proved sufficiently interesting for the Army to commission further research into the tailless concept, which would lead to the Kayaba Ku-2.

Specifications

General characteristics

Crew: One pilot Length: 3.50 m (11 ft 6 in) Wingspan: 10.00 m (32 ft 10 in) Height: 1.80 m (5 ft 11 in) Wing area: 14.0 m2 (151 sq ft) Performance

Maximum speed: 85 km/h (53 mph, 46 kn)

References

Wooldridge, E.T. "Japanese flying wings". History of the Flying Wing. Retrieved 29 April 2007. 日本飞翼的短暂研究 Archived 2012-02-13 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with Kimura HK-1

Start with the simplest possible case. Write down what Kimura HK-1 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 Kimura HK-1 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 Kimura HK-1 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 Kimura HK-1

In research: Kimura HK-1 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 Kimura HK-1 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: Kimura HK-1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930s Japanese experimental aircraft, Aircraft first flown in 1939, Glider aircraft, so understanding it makes those chapters shorter.
In everyday life: Look for Kimura HK-1 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 Kimura HK-1 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kimura HK-1 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 Kimura HK-1 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kimura HK-1 in simple terms?

The Kimura HK-1 was a glider built in Japan in 1939 to investigate the possibilities of tailless aircraft. It was a single-seat design with an open cockpit, swept wings, and a single tail fin.

Why does Kimura HK-1 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 Kimura HK-1?

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 Kimura HK-1.