A vacuum tube which means it must be a near-perfect seal for the entire length of it (hundreds of kilometers of a perfect seal while undergoing heat expansion) and if even a tiny puncture happens to the sealed passenger container they get turned into mashed potato
A vacuum tube which means it must be a near-perfect seal for the entire length of it (hundreds of kilometers of a perfect seal while undergoing heat expansion) and if even a tiny puncture happens to the sealed passenger container they get turned into mashed potato
Why did people ever entertain that nonsense?