Within the space advocacy circuit, I’m noticing that there’s been more attention buzzing about sea launch of rockets, and also recovery of reusable rockets. Particularly, SpaceX did their first “soft landing” tests of a first stage, working toward the goal of re-usability.
This connects to an intriguing technical issue within spaceflight. That…[Read more]
If that is held buoyant by the air bubble at the top, then a simple look would seem to suggest that it’s unstable.
Consider a ball which is filled with water except for an air bubble on top, and floating as this structure is. We would fully expect it to be unstable rotationally. That is, you could easily spin it in-place. Not only would that seem…[Read more]