According to the Unified Theory antigravitational spacecrafts should affect at the stream of a gravitating ether, in which the specified kettle gets. In the given requirements this stream is guided to Earth.  

The following expedients of action at gravitating ether have erected (Gravity control see):  

1. By an artificial stream of ether - a magnetic flux.  

2. By stream of the free microvortexes of ether - free electrons. 

3. By travel of the bound microvortexes (body travel).  

By that the activity of ether on a natural stream can be carried out in one of two directions: a) in the direction of the main stream of ether and b) across the main stream. We will view the specified cases.  

Case 1 a. In such combination the artificial magnetic flux will destroy the natural stream of ether by the activity. It will lead to exclusion of a filtering of the gravitating ether through the kettle, that does it the unweighable. 

The specified magnetic flux can be created a constant magnet or the cylindrical reel reeled from a wire ("Gravity control" see). 

Case 1 b. In this case the gravitating stream of ether deviates from the direction to Earth at its approach to the kettle. It excludes an ether filtering through the kettle so, Gravity disappears in it. 

Here the magnetic flux can be created by a constant magnet, the cylindrical reel or by the densely reeled wire Archimedes spiral (Guidance of Inertia see).                                   

Cases 2 a and 2 b. Here the density and the electron stream cross-section should have rather great values. Therefore the electron stream is necessary for girdling. Thereupon the specified 2 cases are favourable for carrying out in unison. The motion of the dense electron stream towards or across the gravitating stream of an ether will create local return Gravity (Return Gravity look). The local Gravity will quench (case 2 a) the basic Gravity or to decline it (case 2 b) from the direction on the spacecrafts. 

For making of the electron stream with the specified performances  the use of materials in a regime of superconductivity and-or use of fine vacuum cabinets is required.  

Case 3 a. Travel of the bound microvortexes (body travel, chemical bond see) towards to the main stream of an ether for the Gravity counteraction is impracticable in the spacecraftss. 

Case 3 b. Travel of the bound microvortexes across the gravitating stream of an ether leads to transformation of the basic Gravity to the local Gravity. This Gravity will be guided aside from the spacecraft. 

The specified case can be carried out by gyration of the massive disk or the cylindrical ring ("Gravity control" see).