Military industrial hegemony

Chapter 184 Power Parachute (A)

While doing this here, Jiang Chen is also participating in a project under the service company.As mentioned before, a project between the engine laboratory and the fabric laboratory, the powered paraglider.A powered parachute is also called a powered paraglider, which is a kind of flying parachute, and its full name is a powered paraglider.It is a kind of personal leisure aircraft, which originated in Europe in the 70s and was introduced to my country in the late 80s.It is mainly composed of two parts, the paraglider and the engine. It is one of the extreme sports that is popular in the world.Jiang Chen just mentioned it casually at the beginning, but he didn't expect the researchers on both sides to pay attention, and then began to actively research and experiment.

Paramotor (Paramotor) comes from English Paragliding (paragliding) and motor (motorcycle).As the name suggests, a powered parachute is equipped with a power unit on a paraglider. In 1978, Mr. Beden, a French mountaineer, invented the paraglider, which made human's dream of flying in the blue sky come true.However, paragliding still has its deficiencies and defects. The most important point is that it cannot take off and land freely on flat ground. In 1984, a group of French paragliders full of romance and fantasy added a small engine to the paraglider, which was actually the engine removed from the motorcycle.Then, using the engine to drive the thrust of the propeller and the lift of the paragliding wing, the "free take-off and landing" problem that has plagued everyone for a long time has been successfully solved.The purpose of allowing it to fly higher, farther, and stay in the air for a longer period of time has created this emerging aviation sports.

In real life, this was invented in 1984, a year later, but here in Jiang Chen he was submitted to the golden finger.His purpose is to seize the high ground in this field, and then build the first brand in this field.In fact, there are still many functions, not only personal extreme sports, but also many economic, scientific, social and military uses.

This economic effect is mainly an eye-catching advertising effect. Before holding various large-scale events, I wanted to invite various aerobatic teams to perform. Although this is more exciting and spectacular, it costs a lot and is limited by the venue. And time and climate, and there are many unsafe factors, such as the mechanical failure or operational error of the plane participating in the performance, which caused the plane to crash or directly rush into the watching crowd, resulting in tragedy.And this powered paraglider can save a lot of work in this area. It is not only cheap, but also convenient and safe to operate, which greatly guarantees the safety of activities.And it is very important that its noise is very small, and basically has no effect on people on the ground.Unlike airplanes, every time they pass by, they will bring harsh noise to people, which will bring discomfort to people.In addition, his flying speed is slow and the time spent in the air is long, which gives people a lot of appreciation and influence.

This scientific research work is mainly in the monitoring and mapping of the ground.Powered paragliders are light in weight and easy to carry, and are not restricted by take-off and landing sites, so they are very suitable for scientific research teams to survey and map or monitor the field or other areas.Moreover, its price and cost are very low, which can reduce the economic pressure of the entire scientific research team, and because it is in the air, it can monitor or map a certain area more quickly and intuitively, which brings great convenience to scientific research work.

This social use is mainly in various service functions.The most representative is the ability to quickly inspect the disaster situation after the disaster.Because after some disasters, various infrastructures were damaged, roads were blocked, mountains collapsed, and some airports may also be damaged.As a very light aircraft, the powered paraglider can be quickly deployed to the front line of the disaster area.Then inspect a certain area, and then let the relevant disaster relief departments quickly understand the actual situation, make sufficient preparations for the next step, or give their targeted opinions on this area to guide the disaster relief work.In fact, there are many other uses like this, such as fire prevention work in forest areas, and inspection work of power or communication lines, all of which can be completed by powered paragliders.

The last military use is also one that Jiang Chen values ​​more.This powered paraglider is actually divided into two types, one is that the power device is carried on the back of the person, which is usually a single person, and the other is that a person sits on a simple steel pipe flying frame to slide The more take-off, and its power plant is behind this aircraft.This kind of powered paraglider has great uses. It can not only carry another person, but also carry other materials or weapons.The armies of many countries in later generations have introduced this kind of powered paraglider to equip their special forces or elite forces.This kind of umbrella is easy to carry due to its small weight and relatively small volume, so it can fly close to the ground under complex terrain conditions, which can effectively avoid being discovered by the enemy's Raydan.And its noise is small (compared to the aircraft, its noise is very small, and the engine can be turned off, and the paraglider close to it passes silently.), so that it can pass through the enemy's blockade silently.Another point is that it is not restricted by the landing site and can be used under various conditions, which provides great convenience for reconnaissance or special forces or special agents operating behind enemy lines or under complex conditions.

It is easy to say, but it is very difficult to develop.First of all, that is the problem of the fabric of the paraglider's umbrella surface, which cannot be solved.Although it is just a piece of cloth, its technological content is actually very high.This is not something ordinary cloth can do. He has to consider the weight of the cloth itself. If it is too heavy, it will be difficult for it to be stretched by the wind.The second is to ensure its strength and tear resistance while keeping it as light as possible.You must know that after the powered paraglider flies into the sky, the weight of people and equipment is provided by this umbrella. If the umbrella surface is torn apart due to insufficient strength, it will cause the plane to crash. tragedy.The flying altitude of this kind of powered parachute is very low, and you have no time to throw the parachute to survive, because you have already landed before the parachute is opened.Then the colleague who ensures its lightness must ensure the rideability of the umbrella.The reason why the umbrella can bear the weight of the person is because of the air resistance increased by its umbrella surface, because the size of the air resistance is proportional to the square of the speed of the object, so as the person's umbrella accelerates, the air resistance of the person's umbrella is also constant. get bigger.Finally, when the size of the air resistance equals the size of the gravity, the parachute is balanced in force.The parachute descends at a constant speed.

In fact, this is to find a balance of the various characteristics of the fabric.The weaving of cloth is made of warp and weft.The heavier the weight, the more warp and weft threads the fabric has, and the thicker the warp and weft threads themselves.In this way, the gap between the warp and weft threads of the fabric will be smaller, so its ride will be stronger.The fabric requires lightness, which means that its weaving is relatively sparse, so that each thread of it will be increased, thereby reducing the strength of the fabric.And because the gap is relatively large, the driving performance is relatively poor.So although it is a piece of cloth, its technological content is still very high.

(End of this chapter)