DE2903434A1 - Tethering system for captive airborne load-carrying device - has hose from IC engine exhaust feeding thrust nozzles in lift rotor blades - Google Patents

Abstract

The captive airborne load-carrying tethering system includes devices generating their own lift using a supply connection from the ground. The rotor whose blades are equipped with thrust nozzles is supplied with exhaust gas from an IC engine through a hose e.g. 20 m long, suspended from the device. Over part of its length this hose is electrically conducting to form part of an aerial array, connected to the ground by a lead secured to the hose. Guyropes provide lateral stability.

Description

Carrier system with a tied up aircraft

The invention relates to a carrier system as in the Oberbegnff of the claim 1 specified.

Such a carrier system is known (Wehr und Wirtschaft 1-74, p. 58). It consists of an autonomous, tied rotor platform and a container as a ground station. The platform is powered by an air supply with compressed air driven reaction rotor, the air supplier designed as a turbine and mounted on the rotor platform. t'ter one from the ground station to the rotor platform leading fuel line will fuel the turbine from the ground station provided. In the known system, the rotor platform can with a payload of up to up to 150 kg can be stationed at a height of up to 300 m within 5 minutes. It also only takes a few minutes to retrieve.

The advantages of the system make it appear versatile, for example in the civil sector such as disaster control and the like. Here could the system can serve as a carrier for a mobile antenna, in particular a shortwave antenna.

However, it is precisely for such applications that the technical effort appears too high.

It is therefore the object of the invention to create a carrier system, which can be achieved with less technical effort.

This object is achieved by the carrier system with the features of patent claim 1 solved. Advantageous further developments are given in the subclaims.

With the new carrier system it is possible, for example, quickly and easily Positioning mobile shortwave transmitting antennas at heights of approx. 20 m, an application possibility which is also of interest for amateur radio, for example. On this and the like Areas are currently whip antennas for mobile use from beiQnielweise 5 m length or wire antennas are used between portable mast structures stretched. Whip antennas have a very poor efficiency, because of the low ratio of height to wavelength. The portable mast constructions hardly reach heights of more than 5 m, are very weighty, materially expensive and need a lot of working time for assembly and dismantling.

In contrast, the carrier according to the invention is characterized by its uncomplicated, little material, light structure, the larger one Efficiency when used for a mobile shortwave radio antenna and by short set-up times.

In addition, the energy expenditure in operation is due to the use of the exhaust gas energy very small, especially when the exhaust gases from that engine are used which are used to drive a (e.g. electrical generator for the power supply / elnes Sender) is required anyway.

Based on the drawing, a preferred embodiment of the Invention described in more detail: The engine exhaust gases of a radio vehicle 1 are exhausted 2 removed and through a light, heat-resistant, pressure-resistant gas hose 3 forwarded. The gas hose is approx. 20 m long and can be made of foil. At the end of the gas hose there is a buoyancy generating device 4, which is driven with the help of the exhaust gas energy.

A rotor aircraft is suitable with its rotor blades at the blade tips are driven by means of pressurized gas nozzles, but there are also other constructions conceivable.

The aircraft is in order to make the whole structure insensitive to wind 4 at the end of the gas hose 3 on three threads, each of which is by 1200 are offset, attached. These three threads 5 form in the operating state shown of the support system guyings, which each form an angle of approx. 450 form. Other suitable stabilization measures, such as gyroscopic systems, are memorable and the flight is located in front of the carrier system i with the gas hose 3 and the threads 5 still on the ground.

As well as the aircraft with its propellants, which in turn the exhaust gases are driven, lift develops, the aircraft 4 pulls the gas hose 3 vertically upwards and fixes the end of the Gas hose 3, with all three threads 5 being stretched. In this point is - how shown - a stable state has been reached.

The gas hose 3 can have a surface metallization as an antenna obtained via an antenna connection 7 with a transmitter and / or receiver is connected in the radio vehicle 1. It is conceivable instead of surface metallization of the gas hose 3 also a light metal foil strip or a thin wire, which is welded into the gas hose 3.

+ would get along without bracing.

The three threads 5 or parts thereof can also be used as antenna wires at will can be used so that with the arrangement shown both vertical and horizontal radiant and also spotlights with roof capacity can be realized.

The noise development is minimal, because with a slightly increased idle gas the internal combustion engine in the radio vehicle 1 has sufficient exhaust gas energy Disposal. Another advantage is that the current Mctor (i.e. the current Engine) charges the on-board batteries in radio mode.

The erected antenna system is because of the very little material required inconspicuous, easy to transport and cheap. To save weight can also make the Flugzenit 4 out of plastic, which makes it even more robust can.

The efficiency of such a shortwave antenna increases in the lower Shortwave frequency range (in-line radio) with the ratio of the square of the antenna height to the square of the wavelength. Improved compared to a 5 m high whip pole the efficiency increases by a factor of 6 at a height of 20 m.

To dismantle the carrier system, the gas hose 3 is simply pulled down and then the gas pressure generator (rotor) is switched off. The (foil gas hose 3 can be wound up on a roll a few centimeters in diameter. It proves it is particularly advantageous if the gas hose 3 is electrically conductive at the same time and is thus constructed as an antenna conductor at the same time; because that way will the winding and unwinding of the constructive with the electrical conductor for the antenna combined gas hose 3 particularly easily.

Claims (7)

P a t e n t a n s p r ü c h e 1) Carrier system with a tied up Aircraft as a carrier for a load and with a line from the ground to the aircraft, that generates the necessary buoyancy with the help of drive means itself, thereby characterized in that the line is designed as a gas hose (X), on the bottom a compressed gas generator is connected and in the aircraft (4) to the drive means leads, which in turn through the gas hose C)) supplied during operation Pressurized gas are driven. 2) carrier system according to claim 1, characterized in that the gas hose (3) is connected at the bottom to the exhaust (2) of an engine. 3) carrier system according to claim 1 or 2, characterized in that the aircraft (4) has a Rotbr with rotor blades, which are arranged by means of it Pressurized gas nozzles are driven. 4) carrier system according to one of the preceding claims, characterized in that that in operation in addition to the gas hose (3) an electrical conductor as part of a Antenna leads upwards. 5) carrier system according to one of claims 1 to 3, characterized in that that at least part of the gas hose (3) is electrically conductive and as part serves as an antenna. 6) carrier system according to one of the preceding claims, characterized in that that anchoring (threads 5) are provided for the restraint. 7) carrier system according to claim X, characterized in that on the Aircraft with propulsion means, which in turn can be propelled by compressed gas, for A gas hose (3) and an antenna conductor are attached to the supply of the compressed gas.