The vacuum airship could be made differently. Instead of one large chamber, we will make something like a whale's lung. Many individual bladders, spheres with a diameter of 10 cm. Then we need a voltage of about 10 x 6 volts. This voltage can be further reduced or the diameters of the bladders can be increased, assuming that such a airship will only operate at an altitude of 10 km. Then the air pressure is 1/3 of the pressure on the Earth's surface. Since the bladder shell would be very thin, so these whale lungs would weigh little, we must assume that after some time air will get inside. Therefore, after some... (read more)
The vacuum airship could be made differently. Instead of one large chamber, we will make something like a whale's lung. Many individual bladders, spheres with a diameter of 10 cm. Then we need a voltage of about 10 x 6 volts. This voltage can be further reduced or the diameters of the bladders can be increased, assuming that such a airship will only operate at an altitude of 10 km. Then the air pressure is 1/3 of the pressure on the Earth's surface. Since the bladder shell would be very thin, so these whale lungs would weigh little, we must assume that after some time air will get inside. Therefore, after some... (read more)