I'll start with a philosophical introduction ...
Our world consists of two phenomena, this is matter and "pure" energy. We are interested in such a phenomenon as movement, movement of energy. Energy can only move through matter.
For example, electric current, what is it? The movement of electrons along the conductor, which acts as a wire.
Or, say, sunlight - in essence, this is the transfer of energy from the sun to the Earth with the help of the smallest particles. Or, say, heat is the distribution of energy through atoms and electrons.
My theory is based on such a phenomenon as the movement of energy in the form of a wave. Imagine a lake into which you throw a stone.
A fallen stone gives its energy to the water, crashing into it, this generates a wave. The wave in this case is the energy that spreads through matter.
Waves are different, it all depends on the type of matter where they are born. It can be sound waves, "mechanical", which your phone generates in vibration mode, as well as electromagnetic ...
Now closer to the idea ...
1. As an example, consider the waves that form on water. What is their feature? They expand relative to their epicenter. The wave itself is a ~ low-pressure region (located in front) and a high-pressure region (located behind). Thanks to this structure, the wave moves as they move until the opposing factors have exhausted their energy supply.
2. Any wave is the movement of energy through matter, and any matter has mass.
3. Any movement is accompanied by support. When we go, we lean on the road, although we can say that the road rests on us. A flying plane relies on air, and a ship on water, as an example.
As for the wave on the water, it rests on an area with higher pressure on a section of water.
Actually, the idea ...
So, we have a wave on the water, we know that this wave has mass and also has support. To make a wave propulsion, we must make our support, on which outgoing waves could lean. It is perfectly suited as such a support cone.
Suppose we have a cone, at the very beginning there is a "vibrator" that creates waves.The waves propagate from the center and meet an obstacle on their way - the walls of the cone, they have no choice but to lean on these walls and move to the wider part of the cone. (this is how the speaker works).
We know that the waves move to the end of the cone, leaning on its walls, which means that the opposite force acts on the cone - it wants to move in the opposite direction! Well, actually this is how this theoretical engine works.
Of course, such an engine is unlikely to find application in modern aviation, since it has a relatively low power in comparison with classical propellers. But on the other hand, the wave engine has no "anti-action", the helicopter will not need a tail rotor for stabilization, as an example.
The wave engine can be used under water, installed on ships and submarines, it will be much safer and more reliable than a screw.
And finally, if such an engine can be made on the basis of electromagnetic waves, it can be used in space. This will allow you to travel through space using the electricity that you can get from the sun!
That's all, intelligible criticism is welcome) Maybe I was wrong. Is mover possible?