Who Invented the Helicopter? Detailed answer

BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

Who Invented the Helicopter? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Did you know?

Who invented the helicopter?

The idea of an aircraft that could take to the air arose long ago. Leonardo da Vinci already in 1500 AD drew a drawing of a huge helical helicopter. But he never tried to build a helicopter because he didn't have a motor. In 1783, a toy helicopter known as the "Chinese top" was shown in France. It is still not known who invented it. In 1796, Sir John Cayley made prototypes of Chinese tops and also designed a helicopter that was powered by steam.

Over the next hundred years, many people were involved in the construction of helicopters. Some of these models were fantastically complex, some were simple, but only a few of them could fly. The most difficult thing was that there were no powerful, but light engines. Such an engine was made only during the First World War. He allowed the construction of a helicopter that took off from the ground with a man on board.

In 1909 and 1910, Igor Sikorsky designed two helicopters. One of them could lift his own weight. In late 1917, two Austro-Hungarian officers built a helicopter to replace the tethered observation balloon. He made several takeoffs to high altitudes, but this helicopter could not be freely maneuvered. Work on helicopters continued in many countries. But none of the machines met the expectations of the designers.

In 1936, a message came from Germany that a successful helicopter design had been manufactured by the Focke-Wulf company. In 1937, he flew over the entire country at a speed of about 70 miles per hour and at an altitude of more than 335 meters.

In 1940, Sikorsky demonstrated his first operational helicopter. This helicopter was adopted by the US Army in 1942.

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Why does a skunk smell?

If there is an animal in the world that you would not want to be at all, then it is most likely a skunk. However, the skunk is a friendly creature and quickly becomes a pet. What makes the animal so unpopular? Of course, this is his famous smell.

Why does a skunk smell? It turns out that he has special odorous glands that contain a fetid liquid. Skunk releases it with amazing accuracy.

Two glands are located under the tail. The animal aims at its enemy and shoots out a jet of liquid that can hit at a distance of 2,7 m and even more. Sometimes a skunk works with only one gland, sometimes with both. Each of them contains "ammunition" for 5-6 shots.

The jet has a suffocating effect, and therefore, being nearby, it is impossible to breathe. And if the liquid gets into the eyes, it can lead to temporary blindness!

But a skunk won't "hit" without warning. At first, he raises his tail or stomps his feet, so you have enough time to run away.

Since skunks have been farmed and their fur has been used, the scent glands have been removed for obvious reasons.

Now there are three types of skunks: striped, spotted and spotted. They live in North, Central and South America. The striped skunk has a white stripe from the nose to the short ears, another one starts on the neck and splits into two on the back. Striped skunks live from Canada to Mexico. The largest has a length of 76 cm and a 23 cm tail and weighs 13 kg.

The front paws of the animal are armed with long claws, with which it pulls out insects and their larvae from the ground. If you suddenly see many small holes on the ground, this most likely means that a skunk has passed through here.

Skunks bring many benefits to humans, as they feed mainly on beetles, crickets, wasps, grasshoppers, rodents, and even snakes.

Test your knowledge! Did you know...

▪ How long ago was the Great Wall of China built and how big was it?

▪ Why does the highest peak in the world have an English name?

▪ Why is one of the most popular toys named after US President Theodore Roosevelt?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Taste of meat and humane treatment of livestock 19.09.2016

You can often hear that meat (and products from it) that comes from farms that take care of the humane treatment of animals is tastier than meat that is made in enterprises that are focused on the product itself - to make it bigger, faster, etc. But such taste differences, apparently, are just our imagination.

Eric C. Anderson of Tufts University and Lisa Feldman Barrett of Northeastern University and Massachusetts General Hospital conducted the following experiment: they asked people to taste jerky, roast beef, and ham, and evaluate the taste of each product. The differences were that, for example, on one ham it was written that it was made from pigs that walked through green meadows and communicated with their own kind (socialization reduces psychological stress and improves well-being), and on the other ham there was a label of meat economy, which defiantly focused purely on production, and not on the well-being of animals.

As an alternative to both, there were labels of the third kind, on which the origin of the product was described in a neutral way, without humane and inhumane accents. The meat itself was the same in one and in the other case, only the labels differed. It is also worth adding that all participants in the experiment first tried meat products without any labels - so that they could generally assess how they feel the taste.

The results were as follows: "inhumane" foods were generally eaten less, while saying that in the future they would try not to buy them or, in extreme cases, not pay too much for them. Even the immediate sensations of smell and taste changed after meeting the "inhumane" description: the ham seemed too greasy and salty. At the same time, products supposedly made with livestock in mind did not differ much in subjective taste from those that either did not have a label at all or were kept in neutral colors.

Perhaps, because of the "humane" recommendations, the taste did not improve because all the meat for the experiment was taken from those farms where they care about the well-being of animals.

Other interesting news:

▪ Testing self-driving cars with a remote driver

▪ Named the maximum life expectancy of a person

▪ Quectel UC3T 2G/200G/GPRS module

▪ New image recognition processors from Toshiba

▪ Electric coupe-crossover Skoda Enyaq Coupe iV

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Microphones, radio microphones. Article selection

▪ article Semenov Nikolay. Biography of a scientist

▪ Article What Causes a Stomach Ulcer? Detailed answer

▪ article Work on the device of ultrasonic diagnostics. Standard instruction on labor protection

▪ article Small-sized frequency meter. Encyclopedia of radio electronics and electrical engineering

▪ article Grounding and electrical safety protective measures. Grounding conductors. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews