Helicopter - Crane
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Helicopter - Crane

Helicopter - crane.

 

Helicopters are widely used as air cranes for lifting, transporting and installing various materials, equipment and structures. They are used to build power and communication lines, relay stations, telegraph cables, they are installed and installed (poles and supports, then the cable is attached with the help of helicopters.) When laying pipelines, helicopters are used to deliver pipe sections to their installation sites. Helicopters are transported, rigs are installed and serviced, and fences in areas, territories, and easily-assembled houses are delivered in hard-to-reach places.

Helicopter - Crane 1

Helicopters-cranes are used for lifting and installing steel beams and other materials necessary for construction on the upper planes of skyscrapers, as well as for installing construction equipment and air conditioners on the roofs. Helicopters are used to build light bridges. The helicopter is sometimes used as a means of communication with people on earth. In this connection, communication is carried out with the help of inscriptions in the sky, signal strips or missiles, spreading leaflets, signals, dropping-on parachutes relevant information, voice transmission through the loudspeaker.

Read about the helicopter Mi-10 - Crane.

Sometimes, the helicopter is used as a transmission or a relay station for radio-television transmission. The air jet from the helicopter rotor is used to prevent podmorazhivaniya flowers and fruit in the orchards, to accelerate the drying of the trees of ripe fruit, to accelerate the drying of sports fields and playgrounds, to harvest fruits and nuts, scaring birds from crops, dumping snow from the roofs, trees and to clear snow in the avalanche-prone mountain bridges. Stages of work were reduced in the US, Canada and Germany.

Due to its speed and ability to penetrate into hard-to-reach areas, the helicopter hover over the object is used in emergency situations for search and rescue: works in the sea, mountains, forests, deserts, marshes, etc. Helicopters are used in ambulance for emergency ambulance and Medical service. They are used to deliver food, clothing and personnel to disaster areas. These works are used in many developed countries of the world. Although the vast majority of multi-purpose helicopters can be used for the transport of goods outside the external suspension, the area of ​​their use as helicopter cranes in the technical and economic aspects is limited. It can be significantly expanded if the design of the helicopter is adapted to the purposes of its application. The basis for the appearance of a special helicopter crane was the analysis of the design of multipurpose helicopters used for transporting goods on external suspension. Typical disadvantages are: poor viewing conditions; Large weight of the structure of the cargo cabin of the helicopter; General structural scheme unsuitable.

Helicopter - Crane

First wormwood create a helicopter-cranes have been made already 50-ies. However, due to various difficulties it came just before the creation of prototypes. Only in the early 60-ies were the first successful helicopter design cranes, which until now are widely used. Features of the application of helicopters, cranes and helicopters used for the transport of cargo on the external load requires review and resolution of many issues in their design.

The helicopter crane, having a small range of flight with cargo, does not enjoy a good sale. Many consumers operating helicopters need a helicopter that would not only work as a helicopter crane, but could transport cargo on an external suspension to the distances common to other types of helicopters. Cargoes carried on the external suspension can be transported in different ways (as the elements of building structures on the freight crane, passenger cabins, containers, platforms or grids suspended to the power units of the fuselage structure, etc.). Analysis of the capabilities of the helicopter crane shows that with a relatively low cost of maintaining a sound technical condition and economy of use, the range of its use can be so expanded that its use as a special transport helicopter will not give way to a conventional helicopter with a cargo cabin.

Foreign experts have concluded that now -time modern helicopters cranes not yet meet all the requirements imposed on them. This is because the value of the helicopter based on the weight of the rod or transported (raises) the load is still high. The reasons for this - the high cost of development and construction of helicopters and their use is unsatisfactory. The absolute reduction in costs (reducing the cost of production of helicopters, cranes) it is hardly possible in the near future, but you can have thishour increase the number of flight hours and thus reduce their costs relative.

It is also necessary to improve the indicator such as the ratio of flying hours to non-working time, and to reduce the time and costs of maintenance, which is possible with the use of structures with minimal maintenance. This indicator (the ratio of flying hours to non-working time) can be increased by reducing the restrictions imposed on the flight operation of the helicopter by the meteorological situation, which can be ensured by the introduction in flight practice of autonomous navigation, i.e. instrument flight (flight to the work site Or a flight with a suspended load), and, on the other hand, a reduction in the minimum requirements for visual flight rules (for example, for performing loading and unloading operations).

Helicopter - Crane 23

In the future, through the use of appropriate equipment to make foreign firms suggest possible helicopter and cranes at night. All these activities, in their view, would increase the interest of entrepreneurs in the use of helicopters, Crappie in the industry.

(Many companies in the world use helicopters and other types of work. The airline "Okenegen helicopter" is used on some of its helicopters bucket for transport of bulk and liquid cargo on external sling. - Bucket is made of magnesium alloy, and compared to the old design, made of steel, It provides weight savings to 12%, as the. allows to move more material and reduce by half the voyage.

This company is one of the largest commercial helicopter companies in the world. Its fleet consisted in 1970 50, about helicopters. She is one of the first companies in Canada began to use helicopters for laying power lines. In remote mountainous areas, power lines and long 900 250 km were laid by helicopter.

In the jungles of Colombia, 22 miles from the port of Assis, was built drilling station. On the construction of the main station it took 6 months, as first it was necessary to pave the way, which is due to continuous rains again and again rendered impassable. Shuttle and the material workers came up against all sorts of obstacles. Other drilling stations were built with the help of helicopters S-58C, owned by the company "Petroleum helicopters." Construction of one station only required two weeks.

Helicopter - Crane of-10

Helicopter - Crane Mi-10

In the US, it was necessary to lay a cable through the air plains and forest areas. The targeted areas for the reinforcement of the masts were planted builders who were digging trenches.

The fresh concrete is brought up by helicopter S-58C in buckets that were attached to the cargo hook under the fuselage of the helicopter. With slings builders could empty the bucket during a helicopter hovering above the pit. With this foundation to fill each required only 20 min. After setting concrete mass to bring up and installs steel masts.

In the Black Forest in a wooded ravine 2 km wide had to pave the high-voltage line. By conventional means required in a wooded area along the planned road clearing and cut down extra mast to pull the cable. Instead, with the help of a helicopter Bell-47, which was assigned to the drum with a rope from one mast -k another were stretched ropes Perlon.

In West Virginia (USA) with the help of a helicopter required to install one after another truss masts 169 354 power in kW. Masts 16 and 30 m and weight 1,5- 2,6 t partly transported by helicopter or truck exploded vision. Installers delivered to each installation site in a helicopter; This has been achieved record success when one working day were set 32 mast. Foreign airlines were also conducted experiments on the use of a helicopter for drilling in remote northern regions of Canada.

 

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