3 ms·
do you know how hard it is so keep vacuum? let alone massive tubes ? imagine just the temperature differences on day to night cycle and the overall length just
by emkoemko 5y ago
do you know how hard it is so keep vacuum? let alone massive tubes ? imagine just the temperature differences on day to night cycle and the overall length
just look at the energy cost and how much a pump can do in a reasonable time period vs the volume of a large distance tube.