Comment Re:Not same as elevator (Score 2, Interesting) 296
Actually, "out of Earth's gravity well" would truly be the "edge of space", i.e., infinitely far away. As I understand, the biggest problem in getting to space is to spend as little time as possible in the deepest part of the well, because, going straight up, maintaining that altitude costs a lot of power. But if the structure is self-supporting, then you can hoist up your fuel and payload using more efficient means, since you don't have to actively maintain your altitude. It's called "gravity drag". I'm not really up on the numbers, but the first 10% costs you a helluva lot more fuel than the "last" 10%, for most values of $destination.