Electric aerial crane system

Pochari technologies’ has developed a revolutionary type of aerial crane system. The concept utilizes a coaxial rotor system, powered by electric motors receiving electrical powers from a ground-based power unit through electrical cables that remain attached to the lifter craft. The concept allows for much greater mobility and versatility than a conventional wheeled or fixed tower crane does. Although not as flexible as a conventional helicopter due to its electrical cables, it can be thought of as a combination between a conventional heavy-lift helicopter and a ground-based crane. The ground-based power unit consists of a truck with an electrical power plant mounted on providing continuous electrical power to 1500 feet electrical cables. The electrical cables are aluminum alloy 1315 to minimize weight and sheathed with high strength composite sheathing providing additional tensile strength and abrasion resistance.
The concept in total consists of three major components.
A ground-based highly mobile power unit carried by an all-wheel drive truck.
An intermediate hovercraft to carry the weight of the cable and keep the cable away from the load being carried by the lifter.
The lifter craft: A remote-controlled unmanned coaxial heavy lift fully electric rotorcraft designed solely to lift heavy loads. It has no cabin thus no fuselage reducing weight.
The conventional rotorcraft has not been competitive with cranes for heavy lift work aside for a very selective few situations that necessitate the use of a rotorcraft as road access or terrain prohibit the use of a truck crane or tower crane. Despite the almost total freedom to use a heavy-lift rotorcraft in any terrain bypassing obstacles and flying items directly to their destination, the rotorcraft has been constrained by excessive operating costs stemming from high overhaul cost of major components. Turbine engines have historically had high fuel consumption, and aviation fuels mainly jet fuel are typically quite expensive. Insurance is also a major contributor to high rotorcraft cost. In addition these aircraft not utilized very much, due to their limited application outside of heavy lift work, contributing to higher operating cost. Another factor is that most rotorcraft are certified by aviation safety agencies requiring a huge investment by manufacturers which is often hard to recuperate. This cost is passed onto to consumers. The combination of all these factor leads to a situation where available heavy lift rotorcraft are exorbitantly expensive to purchase, maintain and operate. A heavy lift helicoper with a 20,000 lb lift capacity can cost in excess of $20,000,000. The equivalent of 20 brand new large tower crane. For simple economic reasons the heavy lift helicopter has failed to carve a large market share in the global heavy lifting industry.
Pochari Hyperlift technology is not an aircraft, rather it’s an aerial crane system. It uses 100% sustainable electric power for it’s propulsion needs, eliminating the expensive Brayton cycle turbine technology. Electric motors are extremely competitive with conventional combustion engines. With power-weight ratios often exceeding that of state of the art turboshafts, requiring little to no maintenance and possessing a useful life significantly longer than that any combustion engine available. The electric engines is an aircraft designer’s dream. The major disadvantage of electric propulsion is the power supply. In the absence of an onboard turbogenerator, getting sufficient electrical power to the aircraft remains a huge challenge. Current energy storage technology, dominated by Japanese made Lithium ion batteries are not able to store enough electricity for their high installed mass. A pure lithium ion powered aircraft would not have sufficient lift capacity to do any useful work. Pochari Technologies has adopted a simple yet innovative approach to this challenge. By using lightweight Aluminum alloy power cables connected directly to the aircraft we can provide ample electrical power directly to the aircraft without any onboard generation required, saving considerable weight even over a traditional turbo machinery powerplant. The weight of the cables is tolerable. For 1000 feet of 1500 amp cables, around 1800 lbs is required. 1500 Amps is enough current to power a 2.5 MW or 3,300 HP electric motor.

Pochari Technologies’ Hyperlift concept provides comparable lifting capacity than large tower cranes at maximum radius while allowing for rapid moving of the unit thus allowing for much greater mobility. A conventional tower crane is built onto a concrete pad, requiring another tower crane to assemble. Transportation is often a challenge as individual parts of the tower can be quite large. The crane is typically used for an extensive period of time as moving the crane is incredibly difficult due to significant time required to assembly and disassembly. Although the load capacity at the center of the crane is quite high, at the tip of the arm it is a fraction of the capacity. The Hyperlift Heavy lift craft can carry as much as a large tower crane at tip capacity. 20,000 Lbs is the intended load capacity of Pochari Hyperlift. Thanks to the Hyperlift’s enhanced mobility the potential utilization is much greater, a crane may be stuck on a job site for extended periods not being utilized while Hyperlift can be immediately moved to another job site and put to work. This greater utilization will reduce operating costs and save consumers money by eliminating idle equipment from the job site.
The ground-based power unit can be situation 1500 feet away from the lifter craft.

As can be easily seen from this image a 1500 feet radius is quite large, over 40 acres. If the radius is exceeded the ground power unit can be moved closer.

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