Martin Aircraft specialists are ready to realize a person’s desire to fly like a bird. Despite the promise of the company's management to release to the market a certified and technically superior version of the demonstrated prototype - the P12 Martin Jetpack model - by the end of last year, it was decided to postpone the serial launch. However, already in 2016, if you believe the promises of Martin Aircraft management, everyone who wants to become the owner of a single-seat vehicle, which falls into the category of first-class ultralight aircraft, will be able to do so for “only” $200 thousand.

One of the first variations of the “flying pack” of the Martin Jetpack series

The final modification of the 180-kg device is capable of moving a pilot through the airspace at an average speed of 56 km/h, and its maximum speed threshold is about 74 km/h. The thrust for the duct fans is provided by a two-liter engine with a power of 200 hp. With. and a torque of 245 Nm, which theoretically will allow the unit and the pilot to rise to a height of up to 1520 m.

The maximum flight duration of the P12 Martin Jetpack is about 30 minutes, and a mixture of gas and gasoline is used as fuel. A 45-liter tank and relatively low fuel consumption for this type of design will allow you to cover a distance of about 30 km using a “flying pack.”

Don't worry if you lose control or experience critical equipment problems while testing the P12 Martin Jetpack at high altitude. For emergency descent, the developers have provided a parachute system and a durable frame, which is designed to protect the pilot upon landing. True, to ensure maximum safety, the manufacturer recommends not to be reckless and to adhere to an altitude six times lower than the 915 m specified in the product data sheet (the 1.5 km altitude mentioned above was set during preliminary tests of the device).

In addition, Martin Aircraft is ready to organize special training courses for potential buyers, where future sky conquerors will be able to learn the basics of operating a jetpack and feel confident in the air.

And although the company has not yet launched the P12 Martin Jetpack for sale, therefore it can only predict the demand for its invention and is not able to guarantee its commercial success, Martin Aircraft engineers have already taken up the next and more complex project - the creation of a two-seat analogue of the P12 Martin Jetpack.

Inventor Richard Browning, known as “Iron Man,” has put his own jetpacks on the market. The first buyers were residents of London. But, if you have 440 thousand dollars, then right now you can become a superhero.

Richard Browning is an English inventor and entrepreneur who received the nickname “Iron Man” from journalists. In March 2017, Browning founded the company Gravity Industries, where the jetpack was developed, and in April of the same year he presented his invention.

In July 2018, the device went on public sale. The Tony Stark-style flight suit is equipped with five jet engines for vertical flight, and each of them is rated at 22 kilograms of pressure, and it weighs 27 kilograms. The direction and speed of the jetpack's flight is controlled by hand movements, and information on fuel consumption and other data is displayed on the display inside the helmet.

Londoners can be the first to buy a jetpack at the city's oldest department store, Selfridges on Oxford Street. Other buyers can search for information of interest on the company’s website, but for the toy they will have to pay 443,428 US dollars (about 28 million rubles), writes the New York Post. For now, Browning is only giving away copies purchased in advance and made to order.

And here is Browning himself, flying not far from the sale.

The backpack runs on jet or diesel fuel, is capable of reaching speeds of up to 50 kilometers per hour and rising to a height of up to 3.6 kilometers. However, during a demonstration of the backpack outside a department store, Browning floats just a few meters above the ground, explaining this for safety reasons.

It consumes about four liters of fuel per minute when floating freely. Therefore, for three or four minutes you can fly quite easily. We have another version - when flying on cold days, the thrust of the pack increases, and it flies for about nine minutes.

Browning admits that the backpack's runtime isn't ideal, and Gravity Industries is continuing research into improving it. In the meantime, the company offers those who decide to buy a suit to undergo free training on its use and first try themselves as a pilot at the test site.

The invention of the first jetpack is equivalent to the first flight of an airplane. In fact, these flights are amazing - calm and soft. The backpack flies passively, gently.

In the spring of 2017, Browning and his invention broke a world record and ended up in the Guinness Book of Records for the fastest flight in a flying suit in human history. At the same time, the speed of the flying Browning was 32.02 miles per hour (51.53 kilometers per hour).

American inventors are also selling devices from science fiction films. To distribute the first batch of flamethrowers, engineer Elon Musk organized a whole party at SpaceX. .

But Briton Ross Cairns arranged secret agent-style surveillance for his ex-wife. The man subjugated the gadgets surrounding his beloved, and then...

During the first two weeks of November, jetpacks (controllable jetpacks) began to be frequently discussed in the media. Within a month, two models from different companies were announced, several colorful presentation videos were shown, and one of the manufacturing companies entered into a contract with Dubai firefighters. Many publications report that the future is already close, but rumors about the imminent mass production of such technologies have been circulating for several years. The question “Where is my jetpack?” has become a popular title for books and articles, but there is still no answer to it.

TJ decided to figure out when people would be able to buy their own jetpack, and whether it could transform the modern flight transport system.

From comics to Bond

On November 9, 2015, David Mayman flew a jetpack around the Statue of Liberty in New York. So he presented his invention - the JB-9 jetpack. After the flight, the video of which received 1.3 million views on YouTube in two weeks, Mayman declared that he had created "the world's only true jetpack."

However, the jetpack is not a new development. Jetpacks first appeared in the pages of American science fiction comics Amazing Stories in 1928. The cover of one of the issues depicted a man flying with the help of a special backpack on his back.

Until the sixties of the twentieth century, jetpacks existed in cinema (the American TV series “Rocketman”) and legends: there were rumors that during the Second World War a prototype of the Himmelstürmer (“Sky Stormtrooper”) jetpack was created in Germany, but there was no information about it.

The first real flights using a device called the Rocket Belt took place in 1961. Both lasted only 14 seconds, but were proof of a breakthrough in technology. Then the backpack was planned to be used for military purposes, but later abandoned this idea: by 1962, the creators of the prototype, Wendell Moore and Harold Graham, were able to improve the performance only to 21 seconds.

In subsequent years, jetpack technology failed to make significant progress. The devices could take off, the altitude and duration of the flight gradually increased, but they were not adapted to be used in any field other than entertainment. Therefore, the creators of the backpacks staged aerial shows for the public. Such inventors - or "rocketmen" - attracted stadiums of spectators who wanted to look at the jetpack. The device was also popularized by the fourth James Bond film, Thunderball, released in 1965: in one of the scenes of the film, Sean Connery's hero used a jetpack.

The most famous “Rocketman” of the mid-20th century was Bill Suitor, who was Connery’s stunt double and starred in the flight scenes. For 30 years, Sutor has shown the jetpack in 40 countries, performing more than a thousand times. In 1984, he flew on a jetpack during the opening ceremony of the Los Angeles Olympics, which was watched by 2.5 billion people.

The next stage in the development of jetpacks is associated with the Swiss inventor Yves Rossy. In 2002, the pilot decided to create his own jetpack, which he spent more than two years developing. On June 24, 2004, Rossi made its first flight.

His JetCat P400 device can hardly be called a jetpack in the classical sense - the technology is more reminiscent of wings than a backpack. Taking off and landing with their help is impossible: Rossi begins the flight by jumping out of an airplane or helicopter, and lands with a parachute. However, it was the numerous flights that attracted increased attention from the media and the public. The inventor has spoken at a Ted conference and been interviewed by the technology blog Gizmodo. The nickname Jetman stuck to him, and one of his flights over Dubai in May 2015 received 10 million views on YouTube.

34 years of waiting

Currently, most of the hopes of jetpack enthusiasts are connected with Martin Aircraft. Its founder is Glenn Martin, who dreamed of his own jetpack since he was five years old. He has connected his entire life with this technology since 1981.

New Zealand developers first learned about it in 2008, when the first sample called Martin Jetpack was presented. The results were not impressive: the maximum height did not exceed a meter, the flight lasted 45 seconds, and the pilot was constantly supported by assistants. The prototype had little resemblance to jetpacks from science fiction films, but the name “jetpack” itself became an excellent marketing ploy that attracted the attention of major Western media.

Since then, the company’s founder has announced mass production of the technology almost every year. According to him, the first batch of jetpacks was supposed to appear in 2010. This influenced the choice of Time, which included the backpack in its list of the “50 biggest inventions of the year” along with the iPad, the Kickstarter crowdfunding platform and Google’s self-driving car. But then the release date of the first batch shifted first to 2012, and then to another year.

Over the years of development, the jetpack has changed a lot: in 2013, a new model P12 appeared, the maximum flight altitude of which reached 900 meters, the speed increased to 74 kilometers per hour, and the duration increased to 30 minutes. However, it still has significant shortcomings of the previous version. The main one is its massiveness, which makes the device practically useless in everyday life. It’s difficult to talk about a new way to get to work and back if the jetpack weighs 200 kilograms.

During each announcement, the “personal jetpack” seemed to be a real technology, which could only be deterred by the price: in each announcement it varied from 70 to 250 thousand dollars. The last time Martin Aircraft moved the release date to 2017 (pre-orders will be available in 2016). However, it cannot be said with certainty that jetpacks will actually go on sale this time.

This is also due to the financial capabilities of Martin Aircraft. Despite successful presentations and attracting investors, the company suffered losses of five million dollars in the first year after going public. The Popular Science portal notes that this is normal for a company that has not started its sales. But at the same time, she hasn’t started them for almost seven years, and has been working on the technology for 34 years.

In November 2015, Glenn Martin faced competition from the founders of JetPack Aviation, who built their company on the image of "the world's only true jetpacks." “This is different from anything that has happened in the history of flight,” said company CEO David Mayman, talking about the JB-9 model. He showed the development in action, using it to fly around the Statue of Liberty.

The JB-9 is the result of 25 years of development by Mayman and Nelson Tyler, a three-time Oscar winner for technical achievements in cinema. In the 70s, Tyler's jetpack was widely used in Hollywood, but only worked for about 30 seconds. According to the developers, today using the JB-9 you can spend no more than ten minutes in the air.

The main difference from Martin Aircraft technology is that the pack is powered by small single-circuit turbojet engines, like those used on MiG-15 fighters. According to the creators, in the distant future they plan to replace them with more economical dual-circuit ones, like those used in modern jet aircraft. The developers call Martin's jetpacks “virtually a drone,” hinting at the P12 turboprop engines. Another advantage of Mayman and Tyler's design is "true vertical takeoff and landing" while a competitor uses parachutes for landing. At the same time, the JB-9 is much lighter - Mayman noted that the backpack does not prevent him from running several kilometers. But the maximum height at which you can rise with the help of the device is only 300 meters.

JetPack Aviation is focused on developing various air shows for Hollywood, but hopes that the technology can become widespread. However, as of today there is not even an estimated release date for this jetpack model.

Nuclear reactor behind

However, not everyone shares the desire to purchase such a backpack. Despite quite working samples, the device regularly ends up on various lists of unrealized science-fiction technologies such as teleports or flying cars. Critics blame the backpacks for their high price, increased danger during use and negative impact on the environment.

But the main argument of critics is that jetpacks are not needed in the modern world.

Back in September 2014, The Guardian journalist Dean Barnett said that the real problem with the technology is not the limitations of the laws of physics and human anatomy, but that it is simply a “terrible idea.” According to Barnett, most jetpack fans don't think about the impracticality and danger of this method of travel: the author compared a rocket pack to a powerful blowtorch pointed directly at their feet for a long time.

Some people don't want jetpacks because want, but because they were promised this. However, it is not indicated anywhere by whom and when these promises were made. Usually the statements are attributed to "scientists" or simply "science", but it may well be that some people confuse the concepts of "science" and "science fiction", since the idea of ​​​​jetpacks mainly came from there. Science fiction has also promised us a zombie apocalypse, but you rarely see people complaining that it hasn't happened yet.

Dean Barnett, Guardian journalist

Barnett noted several other reasons why the jetpack will not become a mainstream technology in the coming years: environmental pollution, the need to prepare for a flight for years, and the large size of the backpack. The journalist proposed to solve the short duration of work using a miniature nuclear reactor, but noted that “if people are panicking, being ten miles from a nuclear power plant, then, perhaps, they will refuse to carry something like this with them.”

Elon Musk does not share the euphoria about jetpacks. He spoke on this topic on The Colbert Report, answering Stephen Colbert's latest question: “Where is my jetpack?” The head of Tesla Motors and SpaceX said he was “not sure” about these devices, but acknowledged the need for such technologies.

There are several fundamental points in physics that make using jetpacks too inconvenient. But, you know, sometimes I think it would be great to have a vertical takeoff and landing aircraft. Like Harrier attack aircraft, but with more fun in flight.

Elon Musk, head of Tesla Motors

Nikolai Kovshov, a leading analyst at the Quantum Wave fund, recalled in a column for Wired that many technologies, the ideas of which appeared in science fiction of the early 20th century, never took root in everyday life. According to the analyst, the main problems of such devices are very similar - mainly people’s prejudices about some technologies and high expectations from others. Some inventions cannot yet be used en masse, although they were created quite a long time ago. Kovshov gave the example of holograms from popular science films: the technology has existed for more than half a century, but is too expensive, which reduces its use to isolated cases.

Russian scientists and developers have never announced the creation of their own mass jetpack. At the same time, the Zvezda research and production enterprise in the spring of 2014 announced the creation of a solar-powered jetpack for Russian cosmonauts. It was based on an American development from 1994 called SAFER, also intended for moving astronauts in space.

Ordinary people, for now, can count on the maximum on the so-called “water jetpacks”, which have gained a certain popularity in Russia. One of these devices became part of the Olympic torch relay in 2013. Then Mikhail Chuev with a torch over Lake Baikal. However, he used a Jetlev-Flyer JF-260 jetpack made in Germany.

Providing astronauts with equipment for comfortable and efficient work in outer space is reaching a whole new level. Russian scientists have created a jetpack, called a safer in American terminology, necessary for moving between space modules and during rescue operations.

Jetpack Aviation is best known for its jetpacks. However, she recently began taking orders for the Jetpack Speeder flying motorcycle. In accordance with the information published on the manufacturer’s website, there are plans to develop 4 versions of the hoverbike: cargo, military, ultra-light and for outdoor activities. The differences between them will be in maximum speed and flight duration.

The concept of jet or has been implemented by engineers from all over the world for a long time, but the inventions have not yet become a mass-produced product everywhere. Partly due to the difficulty of controlling the device in the air, which is comparable to the skill of piloting a small aircraft, but mostly due to the personal means of transportation.

Waiting for the time when jetpacks will go beyond science fiction and burst into real life, Jetpack Aviation has announced its readiness to move into the exciting world of jetpack racing. And to prove their concept, the developers recently performed a pair of test flights in which two pilots wearing jetpacks flew in close proximity to each other.

Developers and manufacturers of personal jetpacks - Jetpack Aviation, headed by inventor David Maiman, strive to create products that are as safe and easy as possible for ordinary consumers to use. The JB-10 model, presented this year, is positioned by the developers as the most convenient and easy-to-use device designed for individual flights.

Do you remember how, as a child, my mother shouted from the window of the house that it was time for lunch or the festivities were over for the day? Headlong, we hurried to the table so as not to upset our parents or get punished for being late. The children have become adults, but the desire not to be late for important meetings remains, no matter what it is caused by - obligations or other circumstances. How to arrive at the appointed place at the specified time without being late? Filip Flisar, leader of the Slovenian ski cross team, has assembled his own jetpack, which in tandem with skis allows him not to be late, especially for a delicious dinner.

Three extreme athletes, Yves Rossy, Vince Reffet and Fred Fugen, with jetpacks-wings, made an incredibly difficult and exciting flight together with 8 aircraft of the French aerobatic team “Patroul de France”. The aerial performance took place at an altitude of 1,200 meters in the sky over the southern part of France, the flight speed was 260 km/h. During the performance, extreme sports enthusiasts managed to get within a few meters of the planes without consequences. The Jetman Dubai team was the first in the world to make such a crazy and exciting flight until the last second.

After a series of successful tests in Europe, David Maiman and Jetpack Aviation have announced the official launch of sales of the JB-10 jetpack "to highly qualified buyers." Presumably, the device will be available for purchase in the spring of next year, but only for those who undergo the appropriate training - just anyone will not be able to buy the equipment.

Looks like there's a new use for the jetpack. Professional golfer Bubba Watson, who in 2013 collaborated with Oakley and Neoteric Hovercraft to create the Golf Cart Hovercraft, a hovercraft designed to get you around the course quickly and comfortably, has now partnered with Martin Aircraft to develop a golfer-specific Golf Cart Jetpack. . Currently, thanks to the 210 hp engine. With. and two impellers, the pre-production prototype of the car is capable of flying at a speed of 74 km/h at an altitude of up to 914 m. Externally, the Golf Cart Jetpack is no different from the original version, except for the presence of additional compartments for gaming equipment.

The jetpack is a technological device, thanks to which people managed to learn to move in space in a non-standard way. A jetpack is a prototype of a rocket engine. Structurally, the device is made using the same technologies for generating thrust due to the discharge of reactive gases. But the peculiarity of the jet module in the form of a backpack is that it is applicable exclusively for one person. So, is it possible to make a jetpack with your own hands?

Testing of invented rocket packs, as a rule, takes place with the participation of volunteers. A rare engineer-inventor is willing to take personal risks

As always, it all started with science fiction literature and cinema. In a modern interpretation, the idea was picked up by the creators of computer games. As a result, it came to real inventions, starting in the 20s of the last century and continuing to the present day.

The topic of rocket packs excites modern society incredibly. In the future, we see massive sales of rocket modules for personal use and endless queues for them. The boom is comparable to the beginning of the era. Only the stakes for the backpacks are too high.

The personal use rocket pack was first mentioned in 1928. Then a popular magazine publication published the science fiction novel “Armageddon 2419” on the pages of its next issue.

The plot of the film placed great emphasis on rocket packs as a means of transportation in the near future. In fact, the author of the story turned out to be right.

True, the creator of the novel did not guess the date of the first tests of rocket modules for personal use. However, the pioneer is considered to be the American Thomas Moore, the inventor of the Jet West apparatus.

In 1952, he was the first to manage to stay in the air for 2 seconds. Thomas had a rocket pack over his shoulders.

So far, it is only possible to see a person flying without problems only on the film sets of Hollywood directors.

Jetpack design

The history of the design of such devices has preserved information about two types of prototypes:

1. Equipped with a rocket module (Rocket Belt).
2. Equipped with a turbojet module (Jet Belt).

The design of devices of the first type is characterized by a simple design. It was this factor that became the reason for the high popularity of Rocket Belt.

If desired, even the possibility of assembling a classic design in a handicraft production environment is not excluded. But the advantageous factor of Rocket Belt negates another point - a significant limitation of flight time.

The record figure for these devices is no higher than 30 seconds of flight. At the same time, the consumption of hydrogen peroxide is incredibly high. Therefore, the scope of application of devices such as Rocket Belt is so far limited only to the boundaries of demonstration shows. Here we can only recall the US Olympics (1984), where a demonstration flight was demonstrated.

Now there are already modifications that are more advanced than the one in the picture. Capable of moving a person through the air for about 1 hour

Elements of the Rocket Belt jet module:

• durable corset (fiberglass),
• fastening belt system,
• chassis based on light metal tubes,
• a pair of hydrogen peroxide cylinders,
• a cylinder filled with compressed nitrogen,
• rocket module on hinges.

Elements of the rocket module (Jet Belt):

• gas generator,
• jet nozzles (2 pcs.),
• control levers (2 pcs.),
• rotary rod,
• fuel supply control mechanism,
• jet nozzle control mechanism.

Jetpack: Technology Basics

Test flight among skyscrapers with a Rocket Belt rocket pack

The rotary rod raises the fuel filling valve. Nitrogen gas with a pressure of 40-50 ATI crushes a mass of hydrogen peroxide. The substance rushes into the generator chamber.

There, active contact occurs between silver plates treated with samarium nitrate and hydrogen peroxide filling the chamber.

The contact is accompanied by an active reaction and contributes to the rapid formation of a vapor-gas mixture. The resulting vapor-gas environment of high temperature and pressure rushes through the channels into the area of ​​the jet nozzles.

Here the gas mixture expands sharply, accelerates to supersonic speed, and is thrown out. A jet thrust effect is created.

Turbojet version of the device (Jet Belt)

Experiments with this modification continue to this day. There are results, but production costs do not allow the backpack to be put into production

A device of a slightly different configuration - a turbojet backpack for personal use, was invented in 1969. The prototype of the WR-19 turbojet unit, weighing 31 kg, was created by engineers Wendell Moore and John Hulbert.

The first tests of the Jet Belt prototype were carried out the same year and obtained interesting results - a flight of a distance of 100 meters at a seven-meter altitude.

Jet Belt energy is based on mixing kerosene and air. The mixture is compressed to several tens of atmospheres and supplied by a compressor to the working chamber - one of the two working compartments of the apparatus. The second compartment is dedicated to the cooling module, which makes up the cooling circuit of the combustion chamber.

The air-kerosene mixture fills the combustion chamber and ignites. The resulting jet stream rushes out through the nozzles. The nozzle control mechanism makes it possible to regulate the strength and direction of the jet flow.

The turbojet design is characterized by pronounced efficiency. This installation option shows the best flight parameters: duration, acceleration, altitude. But turbojet packs have inherent system complexity and significant financial production costs.

It is even more impossible to make such devices with your own hands. This requires unique equipment and specialists. Unless you just try to build a rocket launcher yourself purely for experimental purposes.

DIY jetpack

The experimental jetpack design is essentially made by hand within one to two working days.

It’s quite possible to do this kind of installation, which is relatively simple from a constructive point of view, with your own hands in a couple of days

The set of necessary parts differs significantly from the set that is required for the production of truly “lifting”, professionally made models:

1. Two metal nozzles.
2. Steel strip (400x40x5).
3. Tin sheet (500x500x0.7).
4. Steel studs (2 pcs.), bearings (4 pcs.).
5. Propane cylinder (small capacity).
6. Gas distribution manifold.
7. Two small-sized 12V electric motors.
8. High pressure hose.
9. Radio control system.

However, personally assembling a jetpack as part of an experiment allows us to better understand the principle of operation of the device and evaluate the possibilities of its manufacture.

Turbine diagram: 1 - intake blade; 2 - high pressure compressor; 3 — high pressure compressor shaft; 4 - high pressure turbine; 5 - low pressure compressor; 6 — low pressure compressor shaft; 7 - combustion chamber; 8 - low pressure turbine; 9 - nozzle

The work, however, is quite dangerous, involving flammable substances. Therefore, before repeating the experiment, you should take care of your own safety.

Preparation of components and assembly

Nozzles suitable for a jetpack turbine can be found on old processing equipment that was used, for example, in the dairy industry. There are a lot of suitable parts on cream and milk dispensing machines.

These are the parts taken from old equipment that, after appropriate processing, can easily be transformed into nozzles for the power turbine of a future aircraft

Old rusty nozzles must be cleaned, carefully processed, and sanded. These operations are easy to perform using widely used instrumentation equipment. Drill holes on the sides of the nozzles to connect the gas distribution manifold bushings.

Small electric motors will need to be placed inside the jetpack nozzles. They are equipped with a long shaft on which several impellers are mounted.

The shaft with impellers is mounted on installed support bearings. The shaft is made of metal pins, and the impellers are made of sheet metal.

Impellers of different diameters are made from sheet metal. A round shape is cut out, divided into sectors, then the work plates are cut with scissors

The prepared nozzles are fastened together by welding with a metal strip. The internal spaces of the nozzles are connected through a gas distribution manifold.

The parts of the gas distribution manifold are turned on a lathe. Hollow threaded bushings, made with your own hands, are easily assembled into a single structure.

In this way - by ordinary drilling with a drill - hollow bushings of the gas mixture distribution manifold are made. A thread is cut for the inter-sleeve connection

The collector design also contains:

• check valves,
• injectors,
• mechanisms for igniting the gas mixture.

Gas (propane) enters through the manifold into the working area of ​​the jetpack nozzles from a small propane cylinder. The volume of the cylinder is enough for 30-40 minutes of intense action.

Fan control system

By adjusting the rotation speed of the fan impellers (turbines), it is convenient to increase or decrease the power of the jetpack.

Therefore, the experimental design is equipped with a radio transmitter and receivers, thanks to which the fan motors are controlled.

Option for controlling the rotation speed of turbine electric motors. Transceiver radio equipment is used, which is equipped, for example, with children's radio-controlled toys.

The transceiver module can be purchased ready-made. Quite suitable receiving and transmitting devices are sold inexpensively through popular online stores.

The fan motors are connected through the controller circuit to the signal receiver. gas mixture ignition system.

During the experiment, the transmitter is located at an arbitrary distance. Subsequently, if it comes to a real takeoff, the device will be attached to the pilot’s body.

Jetpack tests

That's all, actually. A self-made jetpack was successfully tested at home.

Using a simple device - electronic scales, we were able to determine the power of a homemade jetpack

True, the usual trade steelyard acted as a load moved in space. On the scale, the turbine thrust force was quite a bit short of the value - 10 kg. More details in the video below.

Homemade turbine for lifting into the air

Latest Advances in Jetpack Development