DE20011295U1 - Device for achieving variable lift in airships - Google Patents

Description

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Dipl. Ing. (FH) Hennig Rüstau 10115 Berlin Schröderstraße 12 Tel /Fax- ?.R?.?.<n6

GERMAN PATENT AND TRADEMARK OFFICE
80297 Munich

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030-2822936, Rüstau 3 June 2000

Application on Registration a utility model

Ladies and Gentlemen

In accordance with the attached application form G 6003, utility model protection is requested.

Description: a device for achieving variable lift in airships

At present, the use of airships is only possible to a limited extent, because (water) ballast with the same mass as the goods to be transported is required at the destination of the goods.

The reason for this is that an airship rises according to the "lighter than air" principle. This means that small differences in the total mass of the airship cause it to rise or sink. Therefore, the total mass of the airship must be kept constant.

If the goods are now unloaded at the destination, buoyancy occurs which must be compensated for by the addition of (water) ballast.

This problem can be solved by changing the buoyancy of the airship according to needs.

As the total mass of the airship decreases when it is unloaded, the lift must also be reduced. This prevents an unwanted ascent.

The solution to the problem is to reduce the volume of the buoyancy gas in the airship's support cells. This is done by blowing ambient air into the support cells. To prevent the buoyancy gas and air from mixing, a highly elastic membrane is built into the support cell. In contrast to the support cell walls, the membrane can expand within the support cell (like a bubble).

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expand. The support cell is thus divided into a part containing lifting gas and an air
containing part. The volume of the lifting gas is reduced and with it its buoyancy. See drawing 1

For example, to halve the lift, the volume of the lifting gas in all the lifting cells must also be halved. The overpressure required for this is calculated as follows:
Formula: pi*Vi=p2*V2 P2 ⁼ 2pi

where pi is the ambient pressure, P ₂ is the pressure after air has been blown in, Vi is the original volume of the lifting gas in the cell and V ₂ is the volume of the lifting gas after ambient air has been blown in. In the example, twice the ambient pressure must be generated. This can be achieved with simple compressors.

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Claims (1)

Lifting gas cell for airships, which is divided into two parts by a highly elastic and gas-tight membrane.
One part of the lifting gas cell is connected to the ambient air via a drain valve and a compressor. The other part of the cell is filled with lifting gas as usual, so much that the entire volume of the cell is taken up.
The membrane is now pressed against the cell shell.
The compressor can be used to blow ambient air into a part of the lifting gas cell. Since the cell shell is made of non-elastic material, the volume of the part of the cell filled with lifting gas is reduced.
After opening the release valve, the air that was blown in flows out again. The volume of the part of the cell filled with lifting gas increases again to its original size.