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Hand fan

Hand fan 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 Hand fan rather than just read about it. In short: A handheld fan, or simply hand fan, is a broad, flat surface that is waved back and forth to create an airflow. Generally, purpose-made handheld fans are folding fans, which are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve around a pivot so that it can be closed when not in use.

Hand fan — main illustration
Hand fan — illustration

Key takeaways

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

Reference excerpt

A handheld fan, or simply hand fan, is a broad, flat surface that is waved back and forth to create an airflow. Generally, purpose-made handheld fans are folding fans, which are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve around a pivot so that it can be closed when not in use. Hand fans were used before mechanical fans were invented. Fans work by utilizing the concepts of thermodynamics. On human skin, the airflow from hand fans increases the evaporation rate of sweat, lowering body temperature due to the latent heat of the evaporation of water. It also increases heat convection by displacing the warmer air produced by body heat that surrounds the skin, which has an additional cooling effect, provided that the ambient air temperature is lower than the skin temperature, which is typically about 33 °C (91 °F). Next to the folding fan, the rigid hand screen fan was also a highly decorative and desired object among the higher social classes. They serve a different purpose to the lighter, easier to carry hand fans. Hand screen fans were mostly used to shield a lady's face against the glare of the sun or fire.

History

Africa Hand fans originated about 4000 years ago in Egypt. Egyptians viewed them as sacred objects, and the tomb of Tutankhamun contained two elaborate hand fans.

Igbo Akupe (hand fan) Handfans have been found in Igboland dating back to the 9th-11th century in Igbo-Ukwu. Modern hand fans(Akupe) are usually associated with marriages, and special events, and ceremonies.

Ancient Europe

Archaeological ruins and ancient texts show that the hand fan was used in ancient Greece at least from the 4th century BC and was known as a rhipis, rhipister or rhipidion (Ancient Greek: ῥιπίς, ῥιπιστήρ or ῥιπίδιον). Fans were also used to keep flies away (like a fly-flapper), this kind of fan was less stiff and was named μυιoσόβη. Another use for a fan was to fan the flame, e.g. in cookery or at the altar. Christian Europe's earliest known fan was the flabellum (ceremonial fan), which dates from the 6th century. It was used during services to drive insects away from the consecrated bread and wine. Its use died out in western Europe, but continues in the Eastern Orthodox and Ethiopian Churches.

East Asia

China

There were many kinds of fans in ancient China. The Chinese character for "fan" (扇) is etymologically composed of the characters for "door" (戶) and "feather" (羽). Historically, fans have played an important aspect in the life of the Chinese people. The Chinese have used hand-held fans as a way to relieve themselves during hot days since the ancient times; the fans are also an embodiment of the wisdom of Chinese culture and art. They were also used for ceremonial and ritual purposes and as a sartorial accessory when wearing hanfu. They were also carriers of Chinese traditional arts and literature and were representative of its user's personal aesthetic sense and their social status. Specific concepts of status and gender were associated with types of fans in Chinese history, but generally folding fans were reserved for males while rigid fans were for females. In ancient China, fans came in various shapes and forms (such as in a leaf, oval or a half-moon shape), and were made in different materials such as silk, bamboo, and feathers. So far, the earliest fans that have been found date to the Spring and Autumn and Warring States period. It was suggested by the Cultural Relics Archaeology Institute of Hubei Province that these fans were made of either bamboo or feathers and were oftentimes used as burial objects in the State of Chu. The oldest existing Chinese fans are a pair of woven bamboo, wood or paper side-mounted fans from the 2nd century BC. The Chinese form of the feather fan, known as yushan, was a row of feathers mounted in the end of a handle. The arts of fan making eventually progressed to the point that by the Jin dynasty, fans could come in different shapes and could be made in different materials. The selling of hexagonal-shaped fan was also recorded in the Book of Jin. In later centuries, Chinese poems and four-word idioms were used to decorate fans, using Chinese calligraphy pens. The Chinese dancing fan was developed in the 7th century.

Wumingshan

The most ancient ritual Chinese fan is the wumingshan, also known as zhangshan, which is believed to have been invented by Emperor Shun. It is characterized with a long handle and the fan looks like a door in shape. This type of fan was used for ceremonial purposes. While its shape evolved throughout the millennia, it remained used as a symbol of imperial power and authority; it continued to be used until the fall of the Qing dynasty.

Tuanshan Silk round-shaped fans are called tuanshan (团扇), also known as "fans of reunion"; it is a type of "rigid fan". These types of fans were mostly used by women in the Tang dynasty and were later introduced into Japan. These round fans remained mainstream even after the growing popularity of the folding fans. Round fans with Chinese paintings and with calligraphy became very popular in the Song dynasty. During the Song dynasty, famous artists were often commissioned to paint fans. Lacquer fans were also one of the unique handcraft of the Song dynasty. Chinese brides also used a type of moon-shaped round fan in a traditional Chinese wedding called queshan. The ceremonial rite of queshan was an important ceremony in Chinese wedding: the bride would hold it in front of her face to hide her shyness, to remain mysterious, and as a way to ward off evil spirits. After all the other wedding ceremonies were completed and after the groom had impressed the bride, the bride would then proceed in revealing her face to the groom by removing the queshan from her face.

Pukuishan

Another popular type of Chinese fan was the palm leaf fan pukuishan (Chinese: 蒲葵扇), also known as pushan (Chinese: 蒲扇), which was made of the leaves and stalks of pukui (Livistona chinensis).

… excerpt ends here. Continue reading the full article.

Illustrations

Hand fan: Handheld Brise fan from 1800
Handheld Brise fan from 1800
Hand fan illustration
Hand fan illustration
Hand fan: A cocarda fan is one whose flight is 360°, meaning its surface unfolds around the axis of the pin until it completes a perfect circle. It evolved from the shape of oriental fans.
A cocarda fan is one whose flight is 360°, meaning its surface unfolds around the axis of the pin until it completes a perfect circle. It evolved from the shape of oriental fans.
Hand fan: Replica of a short-handled bamboo fan, Warring States period Tomb
Replica of a short-handled bamboo fan, Warring States period Tomb

Worked examples

Example 1 — a first encounter with Hand fan

Start with the simplest possible case. Write down what Hand fan 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 Hand fan 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 Hand fan 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 Hand fan

In research
Hand fan 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 Hand fan 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
Hand fan is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ancient Egyptian technology, Ancient Greek technology, Chinese culture, so understanding it makes those chapters shorter.
In everyday life
Look for Hand fan 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 Hand fan in 20 minutes

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

Frequently asked questions

What is Hand fan in simple terms?

A handheld fan, or simply hand fan, is a broad, flat surface that is waved back and forth to create an airflow. Generally, purpose-made handheld fans are folding fans, which are shaped like a sector of a circle and made of a thin material (such as paper or feathers) mounted on slats which revolve a…

Why does Hand fan 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 Hand fan?

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 Hand fan.

Tags

  • Ancient Egyptian technology
  • Ancient Greek technology
  • Chinese culture
  • Chinese inventions
  • Culture of Japan
  • Culture of Spain
  • Flamenco
  • Greek inventions
  • Hand fans
  • Japanese inventions
  • Romani culture

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