When Worlds Collide was a fun movie that was a double feature shown with the classic War of the Worlds, and had their ship launch via a ramp. The science for such a thing isn’t great, but it was the 50s and looked cool then. The biggest problem is the atmosphere thickness at lower levels. During rocket launches you can hear them talk about reaching max q, or maximum dynamic pressure, where the combination of velocity and air thickness puts the most stress on the structure. Above that it gets easier to go faster, and in the end you need to go fast to avoid falling back down.
When Worlds Collide was a fun movie that was a double feature shown with the classic War of the Worlds, and had their ship launch via a ramp. The science for such a thing isn’t great, but it was the 50s and looked cool then. The biggest problem is the atmosphere thickness at lower levels. During rocket launches you can hear them talk about reaching max q, or maximum dynamic pressure, where the combination of velocity and air thickness puts the most stress on the structure. Above that it gets easier to go faster, and in the end you need to go fast to avoid falling back down.