The theoretical physicist Robert D. Hunt has proposed an interesting aircraft propelled by the effect of gravity, the Gravity Plane.

“Gravity Plane drawing”

-The airplane itself, with a double fuselage, are like two airships swollen with helium and the wings are extendable with a variable surface.

-With this gas, the device becomes light and by means of compressed-air jets it rises.

-Once at level it remains as floating and through descents (effect of gravity), turbines mounted at the top of the central part rotate and move compressors that charge air that is used to push the device up again. And so cyclically.

Throughout the text of this publication we have also seen an airplane operating by the effect of terrestrial magnetic lines.

-The human imagination has no limits.