Drones of a new class Dragonfly Pictures. Free Technical Library News

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New Class Drones Dragonfly Pictures

10.10.2020

Dragonfly Pictures Inc. (DPI) has developed a new class of drones - tethered drones that maintain a constant (stationary) position (hover-in-place) relative to a ship or other vehicle equipped with a base station.

Unlike battery-powered multicopters (multi-rotor drones, or quadcopters) that require battery replacement every 20 minutes, tethered drones are powered by a cable connected to a base station. With this capability, these devices can operate in flight for many hours and even days. Tethered copters track and accompany mobile platforms - sea ships, ships, trucks and other land vehicles.

Compared to fixed-wing drones, the new drones have several advantages, including vertical takeoff and landing. These drones do not require a landing strip, launch pad, or maintenance equipment. Unlike zeppelin drones, the new quadcopters remain continuously stationary even in turbulence and fast gusty winds.

A particular advantage of UMAR drones is that they are able to operate non-stop for more than 400 hours at an altitude of up to 500 feet thanks to continuous power supply over the cable. However, the design of this scheme is associated with significant difficulties. The power supply voltage that is supplied from the ship to the aircraft should be as high as possible to minimize the current, which allows the use of the thinnest and lightest cable possible. Such a drone is highly mobile and its payload is high.

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Airplanes will allow the use of mobile devices 05.12.2022

In its updated digital strategy, the European Commission has proposed defining 5G frequencies that will enable the use of phones and other connected devices during flights.

In practice, the solution will allow airlines to allow customers to make and receive phone calls and text messages, as well as use data in the same way they do on the ground. The service will be provided using special network equipment called pico-cell, which connects the aircraft's on-board system to the ground via satellite.

"The sky is no longer the limit when it comes to the opportunities offered by ultra-fast, high-bandwidth communications," Thierry Breton, European Commissioner for the Internal Market, said in a statement following the announcement of the European Commission's proposal.

The decision of the European Commission does not mean that the use of phones on the plane will be free. Cells and airlines are likely to charge a special rate, since the connection may involve connecting to networks from several countries, which generates roaming charges. In addition, airlines will have to invest heavily in equipment to connect land mobile networks to aircraft in flight.

So far, regulations require passengers on flights to the EU to turn off mobile phones or activate airplane mode before takeoff and throughout the flight. This practice is a safety measure to avoid interfering with the electrical and telecommunications systems of the aircraft.

Connecting to the Internet through wireless devices such as mobile phones, tablets and laptops is only possible through the internal Wi-Fi network offered by the airline, usually as a paid service.

In addition, the European Commission has introduced innovations for road transport: Wi-Fi with a frequency band of 5 GHz will be able to work in cars, buses and other vehicles.

The proposals announced by the European Commission will come into force no later than June 30, 2023.

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